Datasheet - Mouser Electronics
I2C-bus Components
Selection Guide
I2C-bus Components Selection Guide
Overview
TABLE OF CONTENTS
Overview . . . . . . . . . . . . . . . . 1
I2C-bus System Diagram . . . . 2
General Purpose Input
Output (GPIO) Expanders . . . 3
Thermal Sensors and
Voltage Management . . . . . . 6
LCD Display Drivers . . . . . . . 8
Clocks and
Real Time Clocks . . . . . . . . . 11
Tiny Serial Analog-to-Digital
and Digital-to-Analog
Converters . . . . . . . . . . . . . . 12
Multiplexers and Switches . . 13
Bus Buffers and
Voltage Translators . . . . . . . . 15
I2C-Controlled EEPROM,
RAM and DIP Switches
(multiplexed/latched
EEPROMS) . . . . . . . . . . . . . . 18
Intelligent Stepper
Motor Controller . . . . . . . . . 20
By replacing complex parallel interfaces with a straightforward
yet powerful serial structure, the Inter-Integrated Circuit (I2C) bus
revolutionized chip-to-chip communications. The I2C-bus shrinks
integrated circuit (IC) footprints by reducing connection count,
leading to lower IC costs, which in turn simplifies printed circuit
board (PCB) design complexity and reduces system cost. This bus
components selection guide provides an overview of NXP’s deep
I2C-bus solutions portfolio.
History
As electronic designs grew in complexity, a need developed for
an easy and more cost effective way to connect peripheral devices to their controlling microprocessors. To meet this need, Philips
Semiconductors (now NXP Semiconductors) invented a simple
bidirectional 2-wire bus. Originally created over thirty years ago
for television applications, the I2C-bus has since become a de
facto industry standard supported by many companies.
I2C Features
The I2C-bus requires only two lines: a serial data line (SDA) and
a serial clock line (SCL). Each device connected to the bus is
software addressable by a unique address, and simple master/
slave relationships exist at all times.
Operation
Serial 8-bit bidirectional data transfers occur at up to 100kbit/s
in the Standard mode, up to 400kbit/s in Fast-mode (Fm), up to
1Mbit/sec in Fast-mode plus (Fm+), up to 3.4 Mbit/s in high-speed
mode (Hs), and up to 5 Mbits/s (unidirectional) in the new UltraFast-mode (UFm).
I2C Applications
Blinkers, Dimmers, Drivers
(LED Controllers) . . . . . . . . . 23
Although originally designed to link a small number of devices locally, improvements to bus speed options and the introduction of
bus extension devices has allowed the use of the I2C-bus to grow
from applications such as cell phones and car radios to systems
spanning rooms and even buildings.
Capacitive Sensors . . . . . . . 25
I2C Specification
Demo Boards . . . . . . . . . . . 27
For the I2C-bus specification and user manual, please visit:
http://www.nxp.com/documents/user_manual/UM10204.pdf
Bridge Integrated Circuits
and Bus Controllers . . . . . . 21
Resources . . . . . . . . . . . . . . 28
Contact Information . . . . . . 29
1
I2C-bus Components Selection Guide
I2C-bus System Diagram
NXP divides the I2C peripherals portfolio into twelve families, one for each of the most common, everyday
design concerns.
2
I2C-bus Components Selection Guide
General Purpose Input Output (GPIO) Expanders
As applications demand more control and monitoring
features, the General Purpose I/O (GPIO) ports
on microprocessors become more valuable. GPIO
expanders provide expansion capability for most
microprocessor families, allowing designers to save the
microprocessor GPIO for other important functions.
Features
All of NXP’s I2C GPIO expanders offer similar
functionality, and most have an /INT output, but several
also have a /RESET input or /RESET and /OE input.
Applications
• LED control
• Hardware control
monitors
• Humidity sensors
• System monitoring
• ACPI power switches
• Push buttons
• Fans
GPIO Expanders Selection Guide
Device
# of
Outputs
Quasi
Output
Push-Pull
Output
Internal
Pull-up
Resistor/
Current Source
Vcc Range
(V)
I2C Max
Frequency
(kHz)
1.1 to 3.6
1000
2.3 to 5.5
400
/OE
Hardware
Reset
Interrupt
Output


PCA9570
4
Output Only
PCA9536
4

PCA9537
4

2.3 to 5.5
400
PCA9571
8
Output Only
1.1 to 3.6
1000
PCA6408A
8
1.65 to 5.5
400


PCA9538A
8

1.65 to 5.5
400


PCA9554B(C)
8


1.65 to 5.5
400
PCA9500
8


2.3 to 3.6
400
PCA9501
8


2.3 to 3.6
400
PCA9502
8

2.3 to 3.6
400

PCA9557
8

2.3 to 5.5
400

PCA9558
8
Open Drain
2.3 to 5.5
400
PCA9670
8


2.3 to 5.5
1000
PCA8574(A)
8


2.3 to 5.5
400

PCA9534
8

2.3 to 5.5
400

PCA9538
8

2.3 to 5.5
400
PCA9554(A)
8


2.3 to 5.5
400
PCA9672
8


2.3 to 5.5
1000
PCA9674(A)
8


2.3 to 5.5
1000

PCF8574(A)
8


2.5 to 6.0
100


2kbit
EEPROM
5-bit
Multiplex/
1-bit Latch
EEPROM













3
I2C-bus Components Selection Guide
Device
# of
Outputs
Quasi
Output
Push-Pull
Output
Internal
Pull-up
Resistor/
Current Source
Vcc Range
(V)
I2C Max
Frequency
(kHz)
/OE
Hardware
Reset
Interrupt
Output


PCA6416A
16

1.65 to 5.5
400
PCA9535A
16

1.65 to 5.5
400
PCA9539A
16

1.65 to 5.5
400
PCA9555A
16


1.65 to 5.5
400
PCA9671
16


2.3 to 5.5
1000
PCA8575
16


2.3 to 5.5
400

PCA9535C
16
Open
Drain
2.3 to 5.5
400

PCA9535
16

2.3 to 5.5
400

PCA9539
16

2.3 to 5.5
400


PCA9673
16


2.3 to 5.5
1000


PCA9675
16


2.3 to 5.5
1000

PCA9555
16

2.3 to 5.5
400

PCF8575
16


2.5 to 5.5
400

PCF8575C
16
Open Drain
4.5 to 5.5
400

PCA9505
40

2.3 to 5.5
400



PCA9506
40

2.3 to 5.5
400



PCA9698
40

2.3 to 5.5
1000




Open Drain

2kbit
EEPROM
5-bit
Multiplex/
1-bit Latch
EEPROM





GPIO Expanders Agile I/O Selection Guide
# of
Outputs
Quasi
Output
PushPull
Output
Internal
Pull-up
Resistor/
Current
Source
Vcc Range
(V)
I2C Max
Frequency
(kHz)
Hardware
Reset
Interrupt
Status
Interrupt
Output
Voltage
Translating
Capability
PCAL6408A
8
Open Drain


1.65 to 5.5
400




PCAL9538A
8
Open Drain


1.65 to 5.5
400



PCAL9554B(C)
8
Open Drain


1.65 to 5.5
400


PCAL6416A
16
Open Drain


1.65 to 5.5
400


PCAL9535A
16
Open Drain


1.65 to 5.5
400


PCAL9539A
16
Open Drain


1.65 to 5.5
400


PCAL9555A
16
Open Drain


1.65 to 5.5
400


Device



Unique “Agile I/O” Features
Incorporating many highly useful functions commonly added in system applications, the new I2C Agile I/O expanders
offer the following standard integrated hardware features:
• An interrupt pin that reports back to the control processor when an input has changed state
• A hardware reset pin to return the device to its default state without powering down the part
• Two power-supply pins to enable simple level-shifting between different voltage domains (PCA(L)64XX only)
4
I2C-bus Components Selection Guide
In addition, the Agile I/O expanders include important software-programmable features, including:
• A latched input to retain the input state
• Internal pull-up and pull-down resistors (PCA9554B(C) and PCA9555A default pull-up ON)
• An interrupt mask which reduces interrupt traffic to the microcontroller and improves interrupt service response
• Interrupt register reports to identify which input actually caused an interrupt
• An output drive strength control to minimize system noise when multiple outputs switch simultaneously
Need a Simple, Low-cost Way to
Add I/O and Voltage Level Shifting
to your I2C Design?
NXP’s low-voltage translating I/O expander is
the solution.
This part provides additional I/O while keeping
interconnections to a minimum.
It also simplifies interconnection of processors
running at one voltage level to I/O devices
operating at a different voltage level.
PCAL6416A
GPIO
FEATURES
``16-bit general purpose I/O expansion
``400 MHz Fast mode I2C-bus
``Independent operating supply voltage of 1.65 V to
5.5 V for both I/O and I2C-bus interface
``Bidirectional voltage-level translation and
GPIO expansion
``Schmitt trigger action for slow input transition and
better switching noise immunity at SCL/SDA inputs
``Latched outputs for directly driving LEDs
``Low standby current consumption
5
I2C-bus Components Selection Guide
Thermal Sensors and Voltage Management
NXP offers a wide range of temperature sensors to support system reliability and enhance performance. Sensor
options include: local-only, local and remote, and serial presence detect (SPD).
Features
• Wide supply range coverage (1.7 to 5.5V)
• Wide operating temperature range (-55 to 125 ˚C)
• Low power and standby current
• Programmable temperature set points
• Standby mode and one-shot conversion
• Programmable fault queue
• One remote channel
• One thermal alarm output
Applications
• Desktop and notebook computers
• Servers
• Power supplies
• Enterprise communication
Thermal Sensors and Voltage Management Selection Guide
A/D
Resolution
(˚C/#bits)
Supply Range (V)
Supply
Operating
Current
(µA)
Supply Operating
Current (µA)
(typical 25° C/max 125° C)
Package
Options
±0.5
0.0625/12
2.7 to 5.5
400
< 0.1/20
SO-8
TSSOP-8
HWSON-8
TSOP6
SE98A
±1
0.125/11
1.7 to 3.6
400
< 0.1/5
TSSOP-8
HWSON-8
PCT2075
±1
0.125/11
2.7 to 5.5
400
< 0.1/20
SO-8
TSSOP-8
HWSON-8
TSOP6
SE95
±1
0.03125/13
2.8 to 5.5
1000
< 7.5/NA
SO-8
TSSOP-8
WAFER
SE97B
±1
0.125/11
3.0 to 3.6
400
< 0.1/10
HWSON-8
LM75A*
±2
0.125/11
2.8 to 5.5
1000
< 3.5/NA
SO-8
TSSOP-8
LM75B
±2
0.125/11
2.8 to 5.5
300
< 0.2/1
SO-8
TSSOP-8
XSON-8
HWSON-8
Device
Fan
Control
Output
PCT1075
SA56004
NE1617A
1
Local Sensing
Accuracy (˚C)
Remote Sensing
Accuracy (˚C)
±2
±1
0.125/11
3.0 to 3.6
500
10/NA
SO-8
TSSOP-8
HVSON-8
±2
±3
1.0/8
3.0 to 5.5
70
3/10
QSOP-8
*Not recommended for new designs, use LM75B or PCT2075 instead.
6
I2C-bus Components Selection Guide
Precise Temperature Monitoring
Made Simple
NXP’s I2C-bus controlled
temperature sensors offer highresolution solutions for your
thermal management needs.
Ideally suited for personal
computers, industrial
controllers, and other electronic
equipment.
PCT2075
THERMAL
SENSOR
FEATURES
``Pin-for-pin replacement for industry standard
part LM75
``11-bit ADC with enhanced temperature
resolution of 0.125 °C
``Temperature accuracy of ±1 °C from -25 °C to
+100 and ±2 from -55 °C to +125 °C
``Power supply input range of 2.7–5.5 V
``Programmable temperature threshold and
hysteresis set points
``Shutdown mode for power conservation
``Small form factor packages
7
I2C-bus Components Selection Guide
LCD Display Drivers
NXP offers a wide range of LCD Segment, Character and Graphic Drivers for
the most challenging applications in automotive, industrial, and consumer. All
latest NXP LCD drivers are specifically designed for — but not limited to —
driving high-contrast, true black background Vertical Alignment (VA) displays
which offer a very wide viewing angle. Automotive AEC-Q100 compliant
qualification on a wide range of devices ensures highest robustness and
reliability under harshest conditions. Available as cased devices in a package
for Surface Mount Device (SMD) application or as bare die with gold bumps for Chip-On-Glass (COG) application.
Features
Applications
• Wide supply voltage range
• Wide VLCD voltage range
• Low power consumption
• Programmable multiplex rates
• Wide operating temperature range up to +105 ˚C
(selected devices)
• On-chip VLCD generation (charge pump)
(selected devices)
• On-chip VLCD temperature compensation
(selected devices)
• Programmable frame frequency (selected devices)
• AEC-Q100 compliant automotive qualification
(selected devices)
• Industrial
––e-meter (electricity, gas,
water)
––White goods
––Home appliance
––Test & measurement
systems
––Machine control systems
––Point of Sales (POS)
terminals
• Automotive
––Instrument cluster
––Climate control unit
––Car radio
––Tachographs
• Consumer
––Handheld electronics
––Battery operated
equipment
––General purpose display
modules
• Medical and health care
LCD Segment Drivers
Device
Max
number
of
elements
Number of elements at Multiplex Rate
MUX
1:1
MUX
1:2
MUX
1:3
MUX
1:4
96
MUX
1:6
MUX
1:8
VDD
MUX
1:9
VLCD
Frame
Frequency
(Hz)
On-Chip
VLCD
Generation
(Charge
Pump)
On Chip VLCD
Temperature
Compensation
[min]
(V)
[max]
(V)
[min]
(V)
[max]
(V)
128
1.8
5.5
2.5
6.5
82
N
Tamb
Package
AEC-Q100
compliant
85
TSSOP48
N
[min]
(°C)
[max]
(°C)
N
-40
PCF85162T
128
32
64
PCA85162T
128
32
64
96
128
1.8
5.5
2.5
8
110
N
N
-40
95
TSSOP48
Y
PCF85176T
160
40
80
120
160
1.8
5.5
2.5
6.5
82
N
N
-40
85
TSSOP56
N
PCA85176T
160
40
80
120
160
1.8
5.5
2.5
8
82
N
N
-40
95
TSSOP56
Y
PCF85176H
160
40
80
120
160
1.8
5.5
2.5
6.5
82
N
N
-40
85
TQFP64
N
PCA85176H
160
40
80
120
160
1.8
5.5
2.5
8
82
N
N
-40
95
TQFP64
Y
PCF85134HL
240
60
120
180
240
1.8
5.5
2.5
6.5
82
N
N
-40
85
LQFP80
N
PCA85134H
240
60
120
180
240
1.8
5.5
2.5
8
82
N
N
-40
95
LQFP80
Y
PCF8536AT
320
176
252
320
1.8
5.5
2.5
9
60-3001
N
N
-40
85
TSSOP56
N
PCA8536AT
320
176
252
320
1.8
5.5
2.5
9
60-3001
N
N
-40
95
TSSOP56
Y
PCF8537AH
352
44
88
176
276
352
1.8
5.5
2.5
9
60-3001
Y
Y
-40
85
TQFP64
N
PCA8537AH
352
44
88
176
276
352
1.8
5.5
2.5
9
60-3001
Y
Y
-40
95
TQFP64
Y
PCA9620H
480
60
120
240
320
480
2.5
5.5
2.5
9
1
60-300
Y
Y
-40
105
LQFP80
Y
PCA9620U
480
60
120
240
320
480
2.5
5.5
2.5
9
60-3001
Y
Y
-40
105
Bare die
Y
N
Y
PCF8576DU
160
40
80
120
160
1.8
5.5
2.5
6.5
77
N
N
-40
85
Goldbumped
die,
bare die
PCA8576DU
160
40
80
120
160
1.8
5.5
2.5
6.5
77
N
N
-40
85
Goldbumped
die
1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013.
8
I2C-bus Components Selection Guide
Max
number
of
elements
Device
Number of elements at Multiplex Rate
MUX
1:1
MUX
1:2
MUX
1:3
MUX
1:4
MUX
1:6
MUX
1:8
VDD
MUX
1:9
VLCD
[min]
(V)
[max]
(V)
[min]
(V)
[max]
(V)
Frame
Frequency
(Hz)
On-Chip
VLCD
Generation
(Charge
Pump)
On Chip VLCD
Temperature
Compensation
Tamb
[min]
(°C)
[max]
(°C)
Package
AEC-Q100
compliant
PCA8576FU4
160
40
80
120
160
1.8
5.5
2.5
6.5
200
N
N
-40
95
Goldbumped
die
Y
PCF85133U
320
80
160
240
320
1.8
5.5
2.5
6.5
82/1102
N
N
-40
85
Goldbumped
die
N
PCA85133U
320
80
160
240
320
1.8
5.5
2.5
8
82/1102
N
N
-40
95
Goldbumped
die
Y
PCA85233U4
320
80
160
240
320
1.8
5.5
2.5
8
150/2202
N
N
-40
95
Goldbumped
die
Y
PCF85132U
640
160
320
480
640
1.8
5.5
1.8
8
60-901
N
N
-40
85
Goldbumped
die
N
PCA85132U
640
160
320
480
640
1.8
5.5
1.8
8
60-901
N
N
-40
95
Goldbumped
die
Y
PCA85232U
640
160
320
480
640
1.8
5.5
1.8
8
117-1761
N
N
-40
95
Goldbumped
die
Y
PCF8538U3
918
102
204
408
612
816
918
2.5
5.5
4
12
45-3001
Y
Y
-40
85
Goldbumped
die
N
PCA8538U3
918
102
204
408
612
816
918
2.5
5.5
4
12
45-3001
Y
Y
-40
105
Goldbumped
die
Y
1. SW programmable. 2. HW selectable. 3. Release H1 2013. 4. Release H2 2013.
LCD Character Drivers
Number of Lines
x
Number of
Characters
Device
VDD1
Number
of Icons
Character
Set
VDD2
VLCD
[min] [max] [min] [max] [min] [max]
(V)
(V)
(V)
(V)
(V)
(V)
Frame
Frequency
(Hz)
On-Chip VLCD
Generation
(Charge Pump)
On Chip VLCD
Temperature
Compensation
Tamb
Package
AEC-Q100
compliant
[min] [max]
(°C)
(°C)
PCF2113AU
1 x 24
2 x 12
120
A
1.8
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2113DU
1 x 24
2 x 12
120
D
1.8
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2113EU
1 x 24
2 x 12
120
E
1.8
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2113WU
1 x 24
2 x 12
120
W
1.8
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2116AU
1 x 24
2 x 24
4 x 12
A
2.5
6
2.5
6
3.5
9
65
Y
N
-40
85
Gold-bumped die
N
4 x 12
PCF2116CU
1 x 24
2 x 24
C
2.5
6
2.5
6
3.5
9
65
Y
N
-40
85
Gold-bumped die
N
PCF2119AU
1 x 32
2 x 16
160
A
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2119DU
1 x 32
2 x 16
160
D
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2119FU
1 x 32
2 x 16
160
F
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2119IU
1 x 32
2 x 16
160
I
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2119RU
1 x 32
2 x 16
160
R
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2119SU
1 x 32
2 x 16
160
S
1.5
5.5
2.2
4
2.2
6.5
95
Y
Y
-40
85
Gold-bumped die
N
PCF2117RU2
1 x 40
2 x 20
200
R
2.5
5.5
2.5
5.5
4
16
45-3001
Y
Y
-40
85
Gold-bumped die
N
2
PCA2117RU
1 x 40
2 x 20
200
R
2.5
5.5
2.5
5.5
4
16
1
45-300
Y
Y
-40
105
Gold-bumped die
Y
PCF2117SU2
1 x 40
2 x 20
200
S
2.5
5.5
2.5
5.5
4
16
45-3001
Y
Y
-40
85
Gold-bumped die
N
PCA2117SU2
1 x 40
2 x 20
200
S
2.5
5.5
2.5
5.5
4
16
45-3001
Y
Y
-40
105
Gold-bumped die
Y
1. SW programmable. 2. Release H2 2013.
9
I2C-bus Components Selection Guide
LCD Graphic Drivers
VDD1
VDD2
VLCD
Max Display
Resolution
Rows x Cols
Multiplex Rates
PCF8539U2
18 x 100
Mux 1:12; Mux 1:18
2.5
5.5
2.5
5.5
4
PCA8539U2
18 x 100
Mux 1:12; Mux 1:18
2.5
5.5
2.5
5.5
PCF8531U
34 x 128 or
33 x 128 + 128 icons
Mux 1:17, Mux 1:26,
Mux 1:34
1.8
5.5
2.5
PCF8811U
80 x 128 or
79 x 129 + 128 icons
Mux 1:16 to Mux 1:80 in
steps of 8
2
3.3
1.8
Device
Tamb
Frame
Frequency
(Hz)
On-Chip VLCD
Generation
(Charge Pump)
On Chip VLCD
Temperature
Compensation
16
45-3001
Y
Y
-40
4
16
45-3001
Y
Y
4.5
4
9
66
Y
3.3
3
9
30-601
Y
[min] [max] [min] [max] [min] [max]
(V)
(V)
(V)
(V)
(V)
(V)
Package
AEC-Q100
compliant
85
Gold-bumped die
N
-40
105
Gold-bumped die
Y
Y
-40
85
Gold-bumped die
N
Y
-40
85
Gold-bumped die
N
[min] [max]
(°C)
(°C)
1. SW programmable. 2. Release H2 2013.
A8
Automotive AEC-Q100 compliant qualification
for highest robustness and reliability under
harshest conditions.
PC
Specifically designed for high-contrast, true black
background Vertical Alignment (VA) displays which
offer a very wide viewing angle.
537
Fully Featured LCD Drivers for High-Contrast
Vertical Alignment (VA) Displays
Fully featured with on-chip VLCD generation and on-chip VLCD
temperature compensation.
PCA8537
LCD DRIVER
FEATURES
10
``352-segment driver (44, 88, 176, 276 or 352 segments)
``Programmable frame frequency from 60 to 300Hz
``Extended VLCD supply voltage range to 9V
``On-chip VLCD generation (charge pump)
``On-chip VLCD temperature compensation
``Extended temperature range to +95 °C
``AEC-Q100 compliant
``TQFP64 package
I2C-bus Components Selection Guide
Clocks and Real Time Clocks
NXP offers a variety of real-time clocks to suit the many applications requiring accurate time keeping. Options include
ultra-low power, high-temperature tolerant, temperature compensated, and high-accuracy versions.
Features
• All addresses and data transferred serially via I2C-bus
Applications
• Mobile telephones
• Portable instruments
• Electronic metering
• Battery-powered products
Clocks and Real Time Clocks Selection Guide
Device
Bus
Feature
PCA8802
I2C Fm
Ultra low power Smartcard; integrated counter for initiating one time password generation
PCF8523
I2C Fm+
PCF8563
I2C Fm
Ultra low power clock/calendar
PCF85063
I2C Fm
Tiny RTC with 30s, 60s interrupt
PCF85063A
I2C Fm
Tiny RTC with alarm and 30s, 60s interrupt
PCA8565
I2C Fm
High temperature (-40˚C – +125˚C) clock/calendar
PCF8583
I2C
Clock/calendar resolution 0.01 s with 256x8 SRAM
Ultra low power with loss of main power detect and auto battery switch over
PCF2127A
I2C Fm
High-accuracy, low-voltage with 512x8 RAM; temperature compensated
PCA/PCF2129(A)
I C Fm
High accuracy; temperature compensated
2
Precision Timekeeping Doesn’t Have to
Consume Lots of Power
NXP’s PCA2129 Real Time Clock provides precision
timekeeping for automotive, electronic metering, GPS
equipment, or any other application that requires
accurate process timing.
PCA2129
REAL TIME
CLOCK
FEATURES
`` AEC-Q100 compliance for automotive applications
`` Typical accuracy of ±3 ppm from -30 °C to +80 °C
`` 32.768 kHz quartz crystal and oscillator integrated into one
convenient package
`` Battery backed output voltage and low battery detection
`` Temperature compensated crystal oscillator with integrated capacitors
`` Year, month, day, weekday, hours, minutes, seconds, and leap year correction
`` Programmable interrupts and watchdog timer
`` Clock operating voltage of 1.8 V to 4.2 V
11
I2C-bus Components Selection Guide
Tiny Serial Analog-to-Digital and Digital-to-Analog Converters
I2C Analog-to-Digital (A/D) and Digital-to-Analog (A/D) converters provide a way to convert between digital and
analog signals and send the information via the I2C-bus.
Features
• Convert four different analog voltages to
digital values
• Transmit converted data on an I2C-bus for
processing by microprocessor/controller
• Generate one analog voltage output from 8-bit
digital value
Applications
• Record analog information such as temperature,
pressure, battery level, signal strength
• Convert from digital signals to analog voltages
for LCD contrast or buzzer control
Tiny Serial ADC and DAC Selection Guide
Device
PCF8591
A/D
D/A
# Bits
I2C-bus Frequency
Maximum Conversion Rate (kHz)


8
100 kHz
11
Add Data Conversion Functionality
with Minimal Impact
NXP’s PCF8591 provides 8-bit digital-to-analog and
analog-to-digital conversion in a single chip, single
supply, low-power device.
PCF8591 A/D
AND D/A
CONVERTER
FEATURES
12
`` 8-bit CMOS data acquisition device using successive approximation
A/D conversion and multiplying D/A conversion
`` 4 analog inputs programmable as single-ended or differential
`` 1 analog output
`` Serial input/output via I2C-bus
`` Addressable via 3 hardware address pins
`` Sampling rate given by I2C-bus speed
`` Auto-incremented channel selection
`` On-chip track and hold circuit
`` Single operating supply voltage of 2.5 V to 6 V
I2C-bus Components Selection Guide
Multiplexers and Switches
I2C-bus multiplexers and switches provide capacitive isolation when connecting an upstream I2C-bus to a desired
combination of downstream buses. The software-controlled multiplexers and switches break the I2C-bus into two,
four, or eight sub-branches. Multiplexers allow selection of only one downstream branch at a time, while switches
allow selection of any individual downstream sub-branch or combination of downstream sub-branches.
Features
• Interrupt
• Hardware reset
• 2.3–5.5 V operating voltage
• 5 V tolerant input/outputs
• -40–85 ˚C operating temperature range
• 0–400 kHz operating frequency
• I2C and SMBus compatible
Applications
• Connection of I2C devices that operate at
different voltage levels but share a common bus
• Expanded ability to use multiple devices that
share a common I2C address
• Providing voltage level shifting
• Isolating devices when not in use to reduce overall system capacitive loading
Multiplexers and Switches Selection Guide
Multiplexer
(In/Out)
Device
Switch
(In/Out)
I2C-bus # of
Addresses
Interrupt
(IN-OUT)
PCA9540B
1-2
1
PCA9541A
2-1
16
1-2
1-2
8
2-1
4
2-1
8
4-1
4-1
PCA9542A
PCA9543A/B
1-2
1
PCA9544A
1-4
Hardware
Reset


Packages
Pin Count
SO
(Narrow)
8
SO
(Wide)
TSSOP
XSON or
HVQFN
D
DP
GD
16
D
PW
BS
14
D
PW
14
D
PW
20
D
PW
BS

20
D
PW
BS
PW
BS
PCA9545A/B2
1-4
4
PCA9546A
1-4
8

16
8

24
D
PW
BS
D
PW
BS
PCA9547
1-8
PCA9548A
1-8
8

24
PCA9646
1-4
8

16
3
D
D
PW
1. PCA9543A and PCA9543B are identical except for the fixed addresses allowing four of each version on the same bus
2. PCA9545A and PCA9545B are identical except for the fixed addresses allowing four of each version on the same bus
3. No offset bus buffer isolates capacitance to each channel, operates to 1 MHz on Fm+ bus
13
I2C-bus Components Selection Guide
Expand the Reach of your
I2C-based Application
Avoid complete system redesign: address
capacity via bus switches.
NXP’s I2C-bus switches allow selection of
any downstream branch, even those
operating at different voltage levels.
Plus, they reduce overall system
capacitive loading by isolating devices
not currently in use.
PCA9545A
BUS SWITCH
FEATURES
14
``Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and
5 V buses
``1-of-4 bidirectional translating switches
``0-400 kHz clock frequency
``5 V tolerant inputs
``Channel selection via I2C-bus, in any combination
``No glitch power-up
``Hot insertion support
``Power supply operating voltage range of 2.3 V to 5.5 V
I2C-bus Components Selection Guide
Bus Buffers and Voltage Translators
Bus buffers allow designers to expand use of the I2C-bus beyond the 400 pF maximum capacitive loading allowed by
the I2C specification, allowing bidirectional communication without a direction pin.
Features
• Voltage translation
• Opto-electrical isolation
• Bus buffering
• Bus isolation/multiplexing
Applications
• Add more I2C or SMBus devices in the
same system
• Extend the reach of I2C or SMBus over longer distances
• Isolate an I2C or SMBus segment
• Translate voltage levels to allow devices with different voltage requirements to work on the same bus
• Electrically isolate the I2C-bus
• Support multi-point distribution of the I2C-bus
Bus Buffers and Voltage Translators Selection Guide
Type of Capacitance
Isolation Buffer
Description
I2C-bus (V)
(Left)
Iol (mA)
(Left)
I2C-bus (V)
(Right)
Iol (mA)
(Right)
# of
Pins
Typical
Distance
Level Translation
Capability
None - Amplfier
Fm HV bus extender
0 to 12V
3
0 to 12V
30
8
> 20 m
None
PCA9510A
Incremental Offset
Fm hot-swap bus buffer (no RTA)
2.7 to 5.5V
3
2.7 to 5.5V
3
8
On Card
None
PCA9511A
Incremental Offset
Fm hot swap-bus buffer
2.7 to 5.5V
3
2.7 to 5.5V
3
8
On Card
None
PCA9512A
Incremental Offset
Fm VLT hot swap bus buffer
2.7 to 5.5V
3
2.7 to 5.5V
3
8
On Card
2 Supplies
PCA9513A
Incremental Offset
Fm hot-swap bus buffer (92 uA CS)
2.7 to 5.5V
3
2.7 to 5.5V
3
8
On Card
None
PCA9514A
Incremental Offset
Fm hot-swap bus buffer (0.8 V offset)
2.7 to 5.5V
3
2.7 to 5.5V
3
8
On Card
None
PCA9521
Incremental Offset
1 MHz HV Incremental
Offset bus buffer
1.3 to 10V
6
1.3 to 10V
6
8
<3m
Over voltage tolerant
PCA9522
Incremental Offset
1 MHz HV hot-swap bus buffer
1.3 to 10V
6
1.3 to 10V
6
8
<3m
Over voltage tolerant
PCA9525
No offset Buffer
1 MHz bus repeater
1.4 to 5.5V
4
1.4 to 5.5V
4
8
<3m
None
PCA9605
No offset Buffer
Fm+ bus repeater
1.4 to 5.5V
30
1.4 to 5.5V
30
8
< 20 m
None
PCA9646
No offset Buffer
4-channel Fm+ buffer/switch
with RST
1.4 to 5.5V
30
1.4 to 5.5V
30
16
< 20 m
None
P82B96
Static Offset
Fm HV for long distance
and opto-isolation
3.2 to 15V
3
1.4 to 15V
30
8
> 20 m
Over voltage tolerant
PCA9507
Static Offset
Fm VLT DDC buffer with accelerator
2.7 to 5.5V
6
2.7 to 5.5V
6
8
< 20 m
2 Supplies
PCA9508
Static Offset
Fm VLT hot-swap bus repeater
0.9 to 5.5V
6
2.7 to 5.5V
6
8
<3m
2 Supplies
PCA9509
Static Offset
Fm 1.0V LV VLT with current source
1 to 4V
6
3 to 5.5V
6
8
<3m
2 Supplies
PCA9509A
Static Offset
Fm 0.8V LV VLT with current source
0.8 to 1.5V
6
2.3 to 5.5V
6
8
<3m
2 Supplies
PCA9509P
Static Offset
Fm 0.8V LV VLT bus buffer
0.8 to 1.5V
6
2.3 to 5.5V
6
8
<3m
2 Supplies
PCA9515A
Static Offset
Fm bus repeater
2.3 to 5.5V
6
2.3 to 5.5V
6
8
On Card
Over voltage tolerant
PCA9516A
Static Offset
Fm 5-channel hub
2.3 to 5.5V
6
2.3 to 5.5V
6
16
On Card
Over voltage tolerant
PCA9517A
Static Offset
Fm 0.9V LV VLT bus repeater
0.9 to 5.5V
6
2.7 to 5.5V
6
8
<3m
2 Supplies
Device
P82B715
15
I2C-bus Components Selection Guide
Type of Capacitance
Isolation Buffer
Description
I2C-bus (V)
(Left)
Iol (mA)
(Left)
I2C-bus (V)
(Right)
Iol (mA)
(Right)
# of
Pins
Typical
Distance
Level Translation
Capability
PCA9518A
Static Offset
Fm expandable 5-channel hub
2.3 to 5.5V
6
2.3 to 5.5V
6
20
On Card
Over voltage tolerant
PCA9519
Static Offset
4-channel version of PCA9509
1 to 4V
6
3 to 5.5V
6
20
<3m
2 Supplies
PCA9527
Static Offset
Fm DDC VLT with accelerator
and CEC
2.7 to 5.5V
6
2.7 to 3.6V
6
14
< 20 m
2 Supplies
PCA9600
Static Offset
Fm+ HV for long distance
and opto-isolation
2.6 to 15V
3
1.6 to 15V
30
8
> 20 m
Over voltage tolerant
PCA9601
Static Offset
Fm+ HV with stronger 15 mA
local side drive
2.6 to 15V
15
1.6 to 15V
30
8
> 20 m
Over voltage tolerant
PCA9617A
Static Offset
Fm+ 0.8V LV VLT bus repeater
0.8 to 5.5V
6
2.2 to 5.5V
6
8
<3m
2 Supplies
GTL2000
None - FET
22-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
48
On Card
Voltage Clamp
GTL2002
None - FET
2-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
8
On Card
Voltage Clamp
GTL2003
None - FET
8-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
20
On Card
Voltage Clamp
GTL2010
None - FET
10-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
24
On Card
Voltage Clamp
NVT2001
None - FET
1-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
6
On Card
Voltage Clamp
NVT2002
None - FET
2-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
8
On Card
Voltage Clamp
NVT2003
None - FET
3-bit Fm+ Level Translator for
two power supply
1 to 5.5V
64
1 to 5.5V
64
10
On Card
Voltage Clamp
NVT2004
None - FET
4-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
12
On Card
Voltage Clamp
NVT2006
None - FET
6-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
16
On Card
Voltage Clamp
NVT2008
None - FET
8-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
20
On Card
Voltage Clamp
NVT2010
None - FET
10-bit Fm+ Voltage Level Translator
1 to 5.5V
64
1 to 5.5V
64
24
On Card
Voltage Clamp
None - FET
Dual I C/SMBus Fm+ Voltage
Level Translator
1 to 5.5V
64
1 to 5.5V
64
8
On Card
Voltage Clamp
Device
PCA9306
2
Got More Needs than Capability on
your I2C-bus-based System?
Expand your reach with Bus Buffers from NXP.
Add more devices on the same system bus, extend
the bus over longer distances, or isolate segments of
the bus if necessary.
PCA9525
BUS BUFFER
FEATURES
16
`` No offset allows communication with any other device and
multiple devices in series.
`` Impedance isolating buffer function for 2-wire buses
`` Fast switching times for operation > 1MHz
`` 4 mA maximum static open-drain, pull-down capability
`` Input hysteresis for noise immunity
`` Power supply operating voltage range of 2.7 V to 5.5 V
I2C-bus Components Selection Guide
Have Hot Insertion Needs for
Your Backplane?
Plug NXP’s PCA9522 Bus Buffer
into live backplanes without
causing data corruption.
Bring individual parts of your
system on-line successively using
the enable function, which
supports bus section isolation.
PCA9522
BUS BUFFER
FEATURES
``Dual, bidirectional, unity gain, isolating buffering
``Hot insertion logic to prevent data and clock bus corruption
in live backplane applications, specifically designed to
support Advanced TCA applications
``Support for I2C-bus Standard- and Fast-modes
``Enable function to allow bus segments to be disconnected
``Low noise susceptibility
``Support for connection of several buffers in series
``Voltage level shift capability from 1.8 V to 10 V
17
I2C-bus Components Selection Guide
I2C-Controlled EEPROM, RAM and DIP Switches
(multiplexed/latched EEPROMS)
Applications
Small-size serial memories (RAM and EEPROM) are
common and have wide applicability for data storage.
• Meter readings
• Electronic key
• Product identification numbers
• Serial presence detect
• DIP Switches
The multiplexed/latched EEPROMs may be used as
replacements for DIP switches or jumpers because the
settings can be easily changed via the I2C-bus without
having to power down equipment and open cabinets.
Features
• Retain data during power-off (except RAM)
• Address and data transferred serially via the I2C-bus
• Built-in word address register automatically increments
after each byte written or read (EEPROM)
• All bytes may be read in single operation (EEPROM)
• Up to 8 bytes can be written in one operation
(EEPROM)
I2C-Controlled RAM Selection Guide
Device
Power
Supply
Address
Pins
# of Blocks
(256 bytes)
# of Bits
Temperature
Range
(˚C)
Clock
Frequency
(kHz)
PCF8570
2.5–6 V
3
1
2K
-40 to +85
100
I2C-Controlled EEPROM Selection Guide
Device
Power
Supply
Address
Pins
# of Blocks
(256 bytes)
# of Bits
Data
Retention
(Years)
Temperature
Range
(˚C)
Clock
Frequency
(kHz)
PCF8582C-2
2.5–6 V
3
1
2K
10
-40 to +85
100
PCF85103C-2
2.5–6 V
3
1
2K
10
-40 to +85
100
PCF8594C-2
2.5–6 V
2
2
4K
10
-40 to +85
100
PCA24S08A
2.5–3.6 V
0
8 (128 Bytes)
8K
10
-40 to +85
400
PCA9500
2.5-3.6 V
3
1
2K
10
-40 to +85
400
PCA9501
2.5-3.6 V
6
1
2K
10
-40 to +85
400
I2C-Controlled DIP Switches (Multiplexed/latched EEPROM) Selection Guide
# of Pins
# of Non-volatile
Registers
# of
Register
Bits
# of
Hardware
Input Pins
# of
Multiplexed
Outputs
Non-Multiplexed
Inputs
Data
Retention
Temperature
Range
(˚C)
Clock
Frequency
(kHz)
PCF8550
15
1
5
4
4
Yes
10
0 to 70
400
PCA9558
28
1
6
5
5
Yes
10
0 to 70
400
PCA9559
20
1
6
5
5
Yes
10
0 to 70
400
PCA9560
20
2
6
5
5
Yes
10
0 to 70
400
PCA9561
20
4
6
6
6
No
10
0 to 70
400
Device
18
I2C-bus Components Selection Guide
Still Opening Cabinets and
Powering Down Equipment to
Change Manual Switches?
Move to I2C configurable, non-volatile
memory controlled settings with NXP’s
EEPROM DIP switches.
Set these switches easily via the I2C-bus,
controlled by the system microprocessor.
PCA9561
EEPROM
DIP SWITCH
FEATURES
``6-bit 5-to-1 multiplexer DIP switch
``400 kHz maximum clock frequency
``Operating supply voltage of 3.0 V to 3.6 V
``5 V and 2.5 V tolerant inputs/outputs
``Selection of non-volatile registers via I2C-bus
19
I2C-bus Components Selection Guide
Intelligent Stepper Motor Controller
The PCA9629 provides all the logic and control required to drive a four-phase stepper motor via the I2C-bus.
Features
• Generate motor coil drive phase sequence signals with
four outputs for use with external high current drivers
to off-load CPU
• Four balanced push-pull type outputs capable
of sinking 25 mA or sourcing 25 mA for glueless
connection to external high current drivers needed to
drive motor coils
• Up to 1000 pF loads with 100 ns rise and fall times
• Sensor enabled drive control: linked to interrupt from
I/O pins
• Direction control of motor shaft
• Selectable active hold, power off or released states for
motor shaft
• Four general purpose I/Os:
––Configured to sense logic level outputs from optical
interrupter photo transistor circuit
––Configured as outputs to drive (source/sink) LEDs or
other loads up to 25 mA
––Programmable interrupt Mask Control for input pins
• Package offered: TSSOP16
Applications
• Car mirror control
• Automated door windows
• Printers
• Scanners
• Toys
• Robotics
Stepper Motor Control Doesn’t Have to
Consume Valuable Microprocessor Cycles.
NXP’s I2C-bus controlled, low-power-consumption stepper
motor controller provides highly flexible operation.
Control step size, number of steps per command, number
of rotations, direction of rotation and more, all via I2C
programmable control registers.
PCA9629
STEPPER
MOTOR
FEATURES
20
`` 1 MHz Fast-mode Plus (Fm+) I2C-bus operation
`` Built-in oscillator requires no external components
`` Four balanced push-pull type outputs capable of sinking or sourcing 25 mA
`` Drive capability of up to 1000 pF loads with 100 ns rise and fall times
`` Programmable step rate of 344.8 kpps to 0.3 pps with ±5% accuracy
`` Programmable rotation control
`` Programmable watchdog timer
`` Four general purpose I/O for sensing and signaling functions
`` -40 °C to +85 °C operation
I2C-bus Components Selection Guide
Bridge Integrated Circuits and Bus Controllers
Bridge integrated circuits allow designers to connect together devices that use different serial buses. Bus controllers
serve as interfaces between most standard parallel bus microcontrollers/microprocessors and the serial I2C-bus, and
allow bidirectional communication between the parallel bus and the I2C-bus.
Features
• Operate at low voltages
• Consume little power
• Come in a variety of ultra-small package types
Applications
• Host processor communication with disparate serial, wireless, and GPIO interfaces
Bridge Integrated Circuits Selection Guide
Bridge Type
UARTs
GPIO
IrDA SIR Speed (Maximum)
SPI Speed (Maximum)
FIFO (Bytes)
SC16IS740
I2C/SPI Slave to UART
1
0
115.2 Kbps
4
64
SC16IS741
I C/SPI Slave to UART
1
SC16IS750
I C/SPI Slave to UART
1
8
115.2 Kbps
4
64
SC16IS752
I2C/SPI Slave to UART
2
8
115.2 Kbps
4
64
SC16IS760
I2C/SPI Slave to UART
1
8
1.152 Mbps
15
64
SC16IS762
I2C/SPI Slave to UART
2
8
1.152 Mbps
15
64
SC16IS850L
1.8V I2C/SPI Slave to UART
1
SC18IS600
SPI Slave to I2C Master
4
1
Internal
SC18IS601
SPI Slave to I2C Master
3
3
External
SC18IS602B
I2C/SPI Slave to SPI Master
4
1.8 Mbps
Internal
SC18IM700
UART to I2C Master
8
Device
2
2
115.2 Kbps
Oscillator
64
115.2 Kbps
128
Bus Controllers Selection Guide
Type
Voltage Range (V)
Maximum I2C Frequency (kHz)
Clock Source
Parallel Interface
Package
PCA9564
Parallel bus to I2C-bus
controller
2.3 to 3.6 with 5V
tolerance
360
Internal
Fast
DIL-20
SO-20
TSSOP-20
HVQFN-20
PCA9661
Parallel bus to 1 channel
Fm+ I2C-bus controller
3 to 3.6V core
3 to 5.5V I/O
1000
Internal
(trimmed)
Fast with 4k Byte
Buffer
LQFP48
PCA9663
Parallel bus to 3 channel
Fm+ I2C-bus controller
3 to 3.6V core
3 to 5.5V I/O
1000
Internal
(trimmed)
Fast with 4k Byte
Buffer
LQFP48
PCA9665
Fm+ parallel bus to
I2C-bus controller
2.3 to 3.6 with 5V
tolerance
1000
Internal
(trimmed)
Fast with 68 Byte
Buffer
SO-20
TSSOP-20
HVQFN-20
PCA9665A
Fm+ parallel bus to
I2C-bus controller
2.3 to 3.6 with 5V
tolerance
1000
Internal
(trimmed)
Fast with 68 Byte
Buffer
TSSOP-20
PCF8584
I2C-bus controller
4.5 to 5.5
90
External
Slow
DIP-20
SO-20
PCU9661
Parallel bus to 1 channel
UFm I2C-bus controller
3 to 3.6V core
3 to 5.5V I/O
5000
Internal
(trimmed)
Fast with 4k Byte
Buffer
LQFP48
Device
21
I2C-bus Components Selection Guide
Type
Voltage Range (V)
Maximum I2C Frequency (kHz)
Clock Source
Parallel Interface
Package
PCU9668
Parallel bus to 2 channel
Fm+ and 1 channel UFm
I2C-bus controller
3 to 3.6V core
3 to 5.5 V I/O
5000
Internal
(trimmed)
Fast with 4k Byte
Buffer
LQFP48
PCU9669
Parallel bus to 1 channel
Fm+ and 2 channel UFm
I2C-bus controller
3 to 3.6V core
3 to 5.5V I/O
5000
Internal
(trimmed)
Fast with 4k Byte
Buffer
LQFP48
Device
Transmitting Large Amounts
of Serial Data?
NXP’s advanced single master
mode I2C-bus controller supports
8-bit parallel bus to I2C-bus
protocol conversion.
Designed specifically for data
intensive I2C-bus transfers.
PCU9669
BUS
CONTROLLER
FEATURES
22
``Parallel bus to I2C-bus protocol conversion
``5 Mbit/s unidirectional data transfer on Ultra
Fast-mode (UFm) channel (push-pull driver)
``1 Mbit/s and up to 30 mA SCL/SDA IOL Fast-mode
Plus (Fm+) capability
``Individual 4352-byte buffers for the Fm+ and UFm
channels for a total of 13056 bytes of buffer space
``Internal oscillator trimmed to 1% accuracy to reduce
external component requirements
``SCL clock stretching support (Fm+ only)
``Operating supply voltage of 3.0 V to 3.6 V
``I2C-bus I/O supply voltage of 3.0 V to 5.5 V
I2C-bus Components Selection Guide
Blinkers, Dimmers, Drivers (LED Controllers)
Designers commonly use LED controllers/drivers for blinking, dimming, and color mixing LEDs in I2C, SMBus, IPMI and
PMbus applications. Using separate I2C LED controllers limits bus traffic and frees the I2C master for other purposes.
Features
• Any bits not used to drive an LED can be used as normal GPIO
(Dimmers/Blinkers)
• Industrial operating temperature range
• Low standby current
• Offered in a variety of package types
Applications
• Operating number displays such as 7-segment block
• Driving photo flash LED in mobile phones and PDAs
LED Dimmers/Blinkers Selection Guide
LED RGB Color Mixers Selection Guide
Device
# bits
Type
Feature
Bus
Device
# channels
Feature
Bus
PCA9530
2
LED Dimmer
Programmable brightness
I2C
PCA9622
16
100mA 40V
Fm+ I2C
PCA9531
8
LED Dimmer
Programmable brightness
I2C
PCA9624
8
100mA 40V
Fm+ I2C
PCA9532
16
LED Dimmer
Programmable brightness
I2C
PCA9626
24
100mA 40V
Fm+ I2C
PCA9533
4
LED Dimmer
Programmable brightness
I2C
PCA9632
4
Low power
Fm+ I2C
PCA9550
2
LED Driver
Programmable blink rates
I2C
PCA9633
4
Optimized for RGBA
color mixing
Fm+ I2C
PCA9551
8
LED Driver
Programmable blink rates
IC
PCA9552
16
LED Driver
Programmable blink rates
I2C
PCA9634
8
Optimized for RGBA
color mixing
Fm+ I2C
PCA9553
4
LED Driver
Programmable blink rates
I2C
PCA9635
16
Optimized for RGBA
color mixing
Fm+ I2C
PCA9685
16
PWM LED controller
Fm+ I2C
PCU9654
8
100mA 40V
UFm I2C
LED Segment Drivers Selection Guide
2
Device
Feature
PCU9655
16
100mA 40V
UFm I2C
SAA1064
4-digit LED driver
PCU9656
24
100mA 40V
UFm I2C
PCU9955
16
57 mA constant current
UFm I2C
PCA9952
16
57 mA constant current
Fm+ I2C
PCA9955
16
57 mA constant current
Fm+ I2C
LED Flash Drivers Selection Guide
Device
Feature
SSL3250A
Dual LED 500mA Flash driver with Torch and Indicator Modes
SSL3252
Dual LED 500mA Flash driver with Torch and Indicator Modes
23
I2C-bus Components Selection Guide
Add Pizzazz to Your
Product with NXP’s Highly
Configurable LED Drivers
Control blinking and dimming
of RGBA LEDs to support
status, display, backlight, or
amusement functions.
PCA9955
LED DRIVER
FEATURES
24
``16 LED drivers, each programmable for brightness,
dimming/blinking modes, and on/off states
``1 MHz Fast-mode Plus (Fm+) compatible
I2C-bus interface
``Four hardware addressable pins to support
16 devices connected to the same I2C-bus
``8 MHz internal oscillator requiring no
external components
``256-step programmable brightness, group
brightness, and group blinking
``Operating supply voltage of 3 V to 5.5 V
``-20 °C to +85 °C operation
I2C-bus Components Selection Guide
Capacitive Sensors
The PCA8885 and PCF8885 integrated circuits are capacitive 8-channel proximity switches that use a patented
method to detect a change in capacitance on remote sensing plates.
Features
• Dynamic proximity switch with 8 sensor channels
• Support for matrix arrangement of sensors
• Sensing plates can be connected remotely
• Adjustable response time
• Adjustable sensitivity
• Continuous auto-calibration
• Digital processing method
• Direct and latching switch modes
• AEC-Q100 compliant version available for
automotive applications
• I²C Fast-mode Plus (Fm+) compatible interface
• Two I²C-bus addresses
• Cascading of two ICs possible
• Interrupt signaling over I²C-bus
• Interrupt output
• Wide voltage operating range (Vdd = 2.5 V to 5.5 V)
• Sleep mode (Idd < 100 nA)
• Low-power battery operation possible (Idd ~ 10 µA)
• Operating temperature range (Tamb = -40 °C to +85 °C)
• Available in TSSOP28 and SOIC28 package
Applications
• Replacing mechanical switches
• Hermetically sealed keys on a keyboard
• Switches for medical applications
• Touch switch in front of LCD display
• Audio control: on/off, channel, and volume
• User interface and vandal-proof switches
• Switches in or under upholstery, leather, handles, mats,
carpets, tiles and glass
• Use of standard metal sanitary parts (for example, a
tap) as switch
• Portable communication and entertainment units
• White goods control panel
Capacitive Sensor Selection Guide
Device
Voltage
Range (V)
Input
Capacitive
Range (pF)
Sensor
Channels
Temperature
Range (˚C)
I2C Interface
AEC-Q100
Compliant
Package
PCA8885
2.5–5.5
10–40
8
-40 to +85
Fm+

TSSOP28,
SOIC28
PCF8885
2.5–5.5
10–40
8
-40 to +85
Fm+
TSSOP28,
SOIC28
PCF8883
3-9
10-60
1
-40 to +85
1 interrupt
SO8, CSP
PCA8886
3-9
10-60
2
-40 to +85
2 interrupts

TSSOP16
25
I2C-bus Components Selection Guide
Up Your Product’s
“Cool” Factor
Replace mechanical switches with NXP’s
capacitive touch and proximity sensors.
Add switches in or under upholstery, leather,
handles, mats, carpets, tiles, and glass.
Ideal for use in hermetically sealed keyboard
keys, medical applications switches, hazardous
environment switches, white goods control,
and more.
PCA8885
CAPACITIVE
TOUCH AND
PROXIMITY
SENSOR
FEATURES
26
``AEC-Q100 compliance for automotive applications
``Dynamic touch and proximity sensor with
8 sensor channels
``Support for remote connectivity to sensing plates
``Adjustable sensitivity with continuous
auto-calibration
``I2C Fast-mode Plus (Fm+) compatible interface
``Operating voltage range of 2.5 V to 5.5 V
``-40 °C to +85 °C operations
I2C-bus Components Selection Guide
Demo Boards
NXP offers a wide variety of supporting demonstration and evaluation boards, making it easy to program new
peripherals and learn about the I2C-bus protocol.
Product
Description
OM6270
SPI/ I2C-to-UART bridge demonstration board
(SC16IS750)
OM6271
SPI-to-I2C-master bridge demonstration board
(SC18IS600)
OM6272
UART-to-I2C-master bridge demonstration board
(SC18IM700)
OM6273
SPI/ I2C-to-DUART/IrDA/GPIO demonstration
board (SC16IS752)
OM6274
I2C-to-SPI-master bridge demonstration board
(SC18IS602)
OM6275
I2C 2005-1 evaluation board
OM6276
PCA9633 demonstration board
OM6277
PCA9564 evaluation board
OM6278
I2C 2002-1A evaluation board
OM6281
PCA9698 daughter card for I2C 2005-1
OM6282
PCA9633 daughter card for I2C 2005-1
OM6285
I2C 2002-1A evaluation board without PC
controller board
OM6290
LCD driver evaluation board: PCF8576D, PCF2119,
PCF8531, PCA9633
OM6292
PCA21125, PCF8562 demonstration board
OM6293
PCA9600 daughter card for I2C 2005-1
OM6297
PCF2123, PCF8562 demonstration board
OM11051
PCF2127A demonstration board
OM11056
PCA8885/PCF8885 evaluation board
OM11057
OM11057A
PCF8885/86 capacitive sensor and PCF8536 LCD/
LED driver
OM11057A with high sensitivity slider
OM13260
I2C Fm+ development board (RoHS)
OM13285
PCA9629 demonstration board
OM13303
GPIO target board (RoHS)
OM13320
I2C Fm+ development kit (RoHS)
OM13398
PCA9617A bus buffer board
OM13399
Bridge board
OM13320 Fm+ Demonstration Kit which includes
the OM13260 Fm+ Development Board with two
OM13303 GPIO Target Boards and one each of the
OM13398 PCA9617A bus buffer and
OM13399 bridge board
27
I2C-bus Components Selection Guide
Resources
Frequently Asked Questions
Question: Does the presence of Standard Mode devices preclude 1Mbps transfers between Fm+ devices?
Answer: NXP’s Fm+ parts are backward compatible, but a system containing a mix of Standard Mode, Fm, and
Fm+ parts can only be operated at the speed of the slowest part, so if maximum speed is desired, it is
necessary to segregate different speed grade functions onto different I2C-buses.
Question: If an I2C slave device isn’t responding, what are the possible reasons?
Answer: If an I2C slave device doesn’t respond properly, it may be because there was an I2C protocol violation, or
fewer than 8 bits were written to the slave. Also consider that the address could be wrong, the device isn’t
powered up or it is in reset mode.
Question: What does quasi-bidirectional data pins mean? Why do you use quasi?
Answer: Port pins may be described as “quasi-” bidirectional because they are not ALWAYS bidirectional. The
“quasi” means “sometimes” bidirectional. They are bidirectional only when in their default or reset state, or
when they are written as HIGH. In this situation, they are internally pulled high by a weak pull-up current and
they can be pulled LOW by an external signal when they are being used as an input. Port pins may also be
driven high by an external signal. If any port pins are written as LOW, then those pins become unidirectional
outputs and they cannot be used as inputs. The quasi bi-directional devices are very to easy to program.
Question: Can we create a protocol-based bus recovery mechanism using signal toggles for our host I2C path
if the I2C state machine gets hung in the middle of transmitting a byte of data back to the host?
Answer: Bit toggling should work to recover a hung I2C-bus, especially if the design uses NXP microprocessors
and I2C devices. Send out nine clock pulses rather than examining the SDA pin. This approach should
guarantee that the slave removes itself from the bus.
Question: What does remote I/O expander mean?
Answer: Remote I/O expander means the I/O expander is an external chip. It is like any I/O expander in terms of its
application and function.
Question: Can I place masters on either side of an I2C multiplexer?
Answer:I2C multiplexer/switches are very simple devices that are controlled by a master located on the upstream
side. If all of the masters in the system (upstream and downstream of the multiplexer/switches) are
multi-master capable, then it is safe to place them on either side of a multiplexer/switches, but the
downstream masters are isolated when the channel is open since they have no access to the multiplexer/
switch state machine.
Question: How should an unused /RESET pin be terminated?
Answer: An unused /RESET pin needs to be connected to Vcc either directly or through a resistor to limit current if
there is a fault.
Question: How should an unused /INT pin be terminated?
Answer: An unused /INT pin may be connected to GND or left unconnected since it is an open drain output.
28
I2C-bus Components Selection Guide
Website Product Information
I2C-bus websites: www.nxp.com/interface and http://www.nxp.com/products/interface_and_connectivity/i2c
NXP’s I2C-bus websites are a valuable resource for device information and support. They provide direct access
to comprehensive product literature, such as brochures, datasheets, application notes, presentations, packaging
information, and more.
I2C-bus support: http://ics.nxp.com/support/
Visit the I2C-bus support page for manuals, FAQs, information about evaluation kits, tools and training materials, links
to application and design support, and more.
Packaging Information: http://ics.nxp.com/packaging/
Visit the I2C-bus packaging page for technical information about NXP package options.
Videos
www.youtube.com/nxpinterface
Contact Information
Corporate Headquarters:
NXP Semiconductors
Corporate Communications & Branding
High Tech Campus 60
5656 AG Eindhoven
The Netherlands
Fax: +31 40 27 26533
North America:
NXP Semiconductors
411 E. Plumeria Drive
San Jose, CA 95134, USA
Technical Support and Sales
Technical Support: http://www.nxp.com/technicalsupport/
For sales offices and distributors, please visit: www.nxp.com/contact
Notices
© 2013 NXP Semiconductors N.V.
All rights reserved.
Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed
to be accurate and reliable and may be changed without notice.
No liability will be accepted by the publisher for any consequence of its use. Publication thereof does
not convey nor imply any license under patent- or other industrial or intellectual property rights.
Date of release: May 2013
Document order number: 12NC: 9397 750 17443
Mouser Electronics
Authorized Distributor
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