MAX4854H, MAX4854HL

MAX4854H, MAX4854HL
19-3376; Rev 1; 1/05
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
The MAX4854H/MAX4854HL analog switches operate
from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These devices feature
four low on-resistance (7Ω) single-pole/single-throw
(SPST) switches, with 27.5pF on-capacitance, making
them ideal for data signals. If the input signal exceeds the
supply rail, the switches become high impedance and
prevent the signal from feeding through to the output.
The MAX4854H/MAX4854HL are available in the
space-saving (3mm x 3mm), 16-pin, thin QFN package
and operate over the extended (-40°C to +85°C) temperature range.
Applications
Features
♦ USB 2.0 Full Speed (12MB) and USB 1.1 Signal
Switching
♦ Overvoltage Protection if Signal Exceeds VCC
♦ 150MHz -3dB Bandwidth
♦ 27.5pF On-Capacitance
♦ +2V to +5.5V Supply Range
♦ 7Ω On-Resistance
♦ Low 10µA Supply Current
♦ 1.8V Logic Compatible
♦ Available in a Space-Saving (3mm x 3mm)
16-Pin TQFN Package
USB Switching
Ordering Information
High-Bandwidth Data Switching
TEMP RANGE
PINPACKAGE
-40°C to +85°C
16 TQFN-EP*
ACD
MAX4854HLETE
-40°C to +85°C
*EP = Exposed paddle.
16 TQFN-EP*
ACX
PART
MAX4854HETE
NO1 (NC1)
7Ω
0
OFF
IN1
1
ON
COM2
NO2 (NC2)
7Ω
7Ω
7Ω
MAX4854HL
IN_
NC_
0
ON
IN4
1
OFF
SWITCHES SHOWN
FOR LOGIC 1 INPUT
( ) INDICATES THE MAX4854HL
N.C.
2
15
14
13
12 COM4
11 N.C.
MAX4854H
MAX4854HL
IN2
3
COM2
4
10 NO4 (NC4)
9
5
IN3
COM4
NO4 (NC4)
1
16
FOR LOGIC 0 INPUT
IN2
COM3
NO3 (NC3)
SWITCHES SHOWN
NO1 (NC1)
IN4
COM1
VCC
NO_
IN1
IN_
NO2 (NC2)
MAX4854H
MAX4854HL
TOP VIEW
COM1
MAX4854H
TOP
MARK
Pin Configuration
Block Diagram/Truth Table
6
7
8
COM3
PDAs and Other Handheld Devices
NO3 (NC3)
Notebook Computers
GND
Cellular Phones
IN3
THIN QFN
CONNECT EXPOSED PADDLE TO PC BOARD GROUND.
( ) INDICATES THE MAX4854HL
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4854H/MAX4854HL
General Description
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
ABSOLUTE MAXIMUM RATINGS
VCC, IN_, COM_, NO_, NC_ to GND (Note 1) ...........-0.3V to +6.0V
Closed Switch Continuous Current COM_, NO_, NC_.........±50mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 50% duty cycle) ....................................±100mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle) ....................................±120mA
Continuous Power Dissipation (TA = +70°C)
16-Pin Thin QFN (derate 20.8mW/°C above +70°C) .....1667mW
Operating Temperature Range................................-40°C to +85°C
Junction Temperature ...........................................................+150°C
Storage Temperature Range .................................-65°C to +150°C
Lead Temperature (soldering, 10s)......................................+300°C
Note 1: Signals on NO_/NC_ or COM_ exceeding GND are clamped by internal diodes. Signals on IN exceeding GND are clamped
by an internal diode. Limit the forward-diode current to the maximum current rating.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
Supply Voltage
VCC
Supply Current
ICC
CONDITIONS
MIN
TYP
2.0
VCC = 5.5V, VIN_ = 0V or VCC
10
MAX
UNITS
5.5
V
20
µA
VCC
V
ANALOG SWITCH
Analog Signal Range
VNO_,
VCOM_
On-Resistance
RON
On-Resistance Match
Between Channels
(Notes 3, 4)
∆RON
On-Resistance Flatness
(Note 5)
RFLAT
0
VCC = 3V, ICOM_ = 10mA,
VNO_ or VNC_ = 0 to VCC
VCC = 3V, ICOM = 10mA, or
VNO_ or VNC_ = 1.5V
TA = +25°C
7
TA = -40°C to +85°C
TA = +25°C
0.2
TA = +25°C
0.4
0.5
2.5
TA = -40°C to +85°C
3.75
4
NO_ or NC_ Off-Leakage
Current
IOFF
VCC = 5.5V, VNO_ or VNC_ = 1V
or 4.5V, VCOM_ = 4.5V or 1V
TA = +25°C
-2
+2
TA = -40°C to +85°C
-10
+10
TA = +25°C
+2
ION
VCC = 5.5V; VNO_ or VNC_ =
1V, 4.5V, or floating; VCOM_ =
1V, 4.5V, or floating
-2
COM_ On-Leakage Current
-12.5
+12.5
TA = -40°C to +85°C
Ω
Ω
TA = -40°C to +85°C
VCC = 3V, ICOM_ = 10mA,
VNO_ or VNC_ = 1V, 2V, 3V
9
10
Ω
nA
nA
DYNAMIC CHARACTERISTICS
Signal Over Rail to High-Z
Switching Time
VNO_ or VNC_ = VCC to (VCC + 0.5V), VCC < 5V
(Figure 1)
0.5
1
µs
High-Z to Low-Z Switching
Time
VNO_ or VNC_ = (VCC + 0.5V) to VCC, VCC < 5V
(Figure 1)
0.5
1
µs
Skew (Note 3)
tSKEW
RS = 39Ω, CL = 50pF (Figure 2)
0.15
1
ns
Propagation Delay (Note 3)
tPD
RS = 39Ω, CL = 50pF (Figure 2)
0.9
2
ns
40
60
tON
VCC = 3V, VNO_ or VNC_ =
1.5V, RL = 300Ω, CL = 50pF
(Figure 1)
TA = +25°C
Turn-On Time
VCC = 3V, VNO_ or VNC_ =
1.5V, RL = 300Ω, CL = 50pF
(Figure 1)
TA = +25°C
Turn-Off Time
2
tOFF
ns
TA = -40°C to +85°C
100
30
40
ns
TA = -40°C to +85°C
_______________________________________________________________________________________
60
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
Charge Injection
CONDITIONS
Q
MIN
TYP
VCOM_ = 1.5V, RS = 0Ω, CL = 1nF (Figure 3)
MAX
UNITS
8
pC
Off-Isolation (Note 6)
VISO
f = 100kHz, VCOM_= 1VRMS, RL = 50Ω, CL = 5pF
(Figure 4)
-80
dB
Crosstalk
VCT
f = 1MHz, VCOM_= 1VRMS, RL = 50Ω, CL = 5pF
(Figure 4)
-95
dB
-3dB Bandwidth
BW
Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 4)
150
MHz
Total Harmonic Distortion
THD
f = 20Hz to 20kHz, VCOM_ = 1V + 2VP-P, RL = 600Ω
0.04
%
NO_ Off-Capacitance
COFF
f = 1MHz (Figure 5)
12
pF
COM On-Capacitance
CON
f = 1MHz (Figure 5)
27.5
pF
DIGITAL I/O (IN_)
Input-Logic High Voltage
VIH
Input-Logic Low Voltage
VIL
Input Leakage Current
IIN
VCC = 2V to 3.6V
1.4
VCC = 3.6V to 5.5V
1.8
V
VCC = 2V to 3.6V
0.5
VCC = 3.6V to 5.5V
0.8
VIN_ = 0 or 5.5V
-0.5
V
+0.5
µA
Note 2: Specifications are 100% tested at TA = +85°C only, and guaranteed by design and characterization over the specified
temperature range.
Note 3: Guaranteed by design and characterization; not production tested.
Note 4: ∆RON = RON(MAX) - RON(MIN).
Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 6: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Typical Operating Characteristics
(VCC = 3.0V, TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
25
VCC = 2.0V
20
VCC = 2.3V
15
6
5
TA = +25°C
4
VCC = 5.0V
3
2
0
2
4
COM VOLTAGE (V)
6
4.0
TA = +25°C
3.5
3.0
2.0
5
0
TA = +85°C
4.5
2.5
TA = -40°C
VCC = 2.5V
VCC = 3.0V
10
TA = +85°C
VCC = 5.0V
5.0
ON-RESISTANCE (Ω)
ON-RESISTANCE (Ω)
30
VCC = 3.0V
7
ON-RESISTANCE (Ω)
VCC = 1.8V
ON-RESISTANCE vs. COM VOLTAGE
5.5
MAX4854H toc03
MAX4854H toc01
40
35
8
MAX4854H toc02
ON-RESISTANCE vs. COM VOLTAGE
45
TA = -40°C
1.5
0
0.5
1.0
1.5
2.0
COM VOLTAGE (V)
2.5
3.0
0
1
2
3
4
5
COM VOLTAGE (V)
_______________________________________________________________________________________
3
MAX4854H/MAX4854HL
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25°C, unless otherwise noted.)
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
5
4
TA = +85°C
3
40
tON
30
20
tOFF
10
2.5
3.5
4.5
2.5
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
3.5
26
tOFF
24
5.5
4.5
-40
-15
CHARGE INJECTION vs. COM VOLTAGE
1.2
1.0
VIN FALLING
0.8
VCC = 5V
20
60
85
LEAKAGE CURRENT vs. TEMPERATURE
VCC = 3V
30
35
1.6
MAX4854H toc08
MAX4854H toc07
VIN RISING
10
TEMPERATURE (°C)
40
CHARGE INJECTION (pC)
LOGIC THRESHOLD (V)
1.4
28
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
1.6
tON
30
20
1.5
5.5
1.4
LEAKAGE CURRENT (nA)
1.5
32
22
0
2
MAX4854H toc06
50
34
10
MAX4854H toc09
TA = +25°C
MAX4854H toc05
TA = -40°C
60
TURN-ON/TURN-OFF TIME (ns)
SUPPLY CURRENT (µA)
6
MAX4854H toc04
7
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
TURN-ON/TURN-OFF TIME (ns)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
1.2
COM ON-LEAKAGE
1.0
0.8
COM OFF-LEAKAGE
0.6
0.4
0.2
0.6
0
3.5
4.5
5.5
1
2
3
5
4
-40
-15
10
35
COM VOLTAGE (V)
TEMPERATURE (°C)
FREQUENCY RESPONSE
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
SWITCH ENTERING
HIGH-IMPEDANCE STATE
ON-RESPONSE
0
THD (%)
-40
OFF-RESPONSE
RL = 600Ω
VCC = 3.0V
VNC
2V/div
0V
0.1
-60
VCOM
CROSSTALK
HI-Z
STATE
HI-Z
STATE
0V
-100
0.01
1
10
FREQUENCY (MHz)
100
1000
85
MAX4854H toc12
1
-20
0.1
60
SUPPLY VOLTAGE (V)
-80
4
0
0
MAX4854H toc11
20
2.5
MAX4854H toc10
1.5
FREQUENCY RESPONSE (dB)
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
10
100
1k
10k
100k
200µs/div
FREQUENCY (Hz)
_______________________________________________________________________________________
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
PIN
NAME
FUNCTION
1, 5, 7, 10
NO1, NO2,
Normally Open Terminals for Analog Switch (MAX4854H)
NO3, NO4
1, 5, 7, 10
NC1, NC2,
Normally Closed Terminals for Analog Switch (MAX4854HL)
NC3, NC4
2, 11
N.C.
No Connection. Internally not connected.
3
IN2
Digital Control Input for Analog Switch 2. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN2
opens switch 2 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN2 connects COM2 to NO2.
4
COM2
6
GND
8
COM3
9
IN3
12
COM4
Common Terminal for Analog Switch 2
Ground
Common Terminal for Analog Switch 3
Digital Control Input for Analog Switch 3. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN3
opens switch 3 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN3 connects COM3 to NO3.
Common Terminal for Analog Switch 4
Digital Control Input for Analog Switch 4. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN4
opens switch 4 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN4 connects COM4 to NO4.
13
IN4
14
VCC
Supply Voltage. Bypass VCC to GND with a 0.01µF capacitor as close to the pin as possible.
15
IN1
Digital Control Input for Analog Switch 1. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN1
opens switch 1 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN1 connects COM1 to NO1.
16
COM1
—
EP
Common Terminal for Analog Switch 1
Exposed Paddle. Connect to PC board ground plane.
Detailed Description
The MAX4854H/MAX4854HL quad SPST switches have
low on-resistance, operate from a +2V to +5.5V supply,
and are fully specified for nominal 3.0V applications.
These devices feature overvoltage protection by
putting the switch into high-impedance mode when the
switch input exceeds VCC.
These switches have low 27.5pF on-channel capacitance, which allows for 12Mbps switching of the data signals for USB 2.0 full speed/1.1 applications. The
MAX4854H/MAX4854HL are designed to switch D+ and
D- USB signals with a guaranteed skew of less than 1ns
(see Figure 2) as measured from 50% of the input signal
to 50% of the output signal.
Applications Information
Digital Control Inputs
The logic inputs (IN_) accept up to +5.5V even if the
supply voltages are below this level. For example, with a
+3.3V VCC supply, IN_ can be driven low to GND and
high to +5.5V, allowing for mixing of logic levels in a
system. Driving IN_ rail-to-rail minimizes power consumption. For a +2V supply voltage, the logic thresholds
are 0.5V (low) and 1.4V (high); for a +5V supply voltage,
the logic thresholds are 0.8V (low) and 1.8V (high).
Analog Signal Levels
The on-resistance of these switches changes very little
for analog input signals across the entire supply voltage range (see the Typical Operating Characteristics).
The switches are bidirectional, so the NO_ and COM_
pins can be either inputs or outputs.
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum ratings
because stresses beyond the listed ratings may cause
permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply VCC before applying
analog signals, especially if the analog signal is not
current limited.
_______________________________________________________________________________________
5
MAX4854H/MAX4854HL
Pin Description
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
Test Circuits/Timing Diagrams
MAX4854H
VCC
VNO
LOGIC
INPUT
V CC
COM_
NO_
t R < 20ns
t F < 20ns
VCC
50%
0V
VOUT
RL
t OFF
SWITCH
OUTPUT
CL
VOUT
0.9 x V0UT
0.9 x VOUT
0V
IN_
t ON
GND
LOGIC
INPUT
SWITCH
INPUT
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VNO
RL + RON
(
VCC + 0.5V
tHIZB
)
HIGH-Z MODE
tHIZ
NORMAL MODE
NORMAL MODE
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
tri
90%
50%
A
TxD+
B
INPUT A
10%
tskew_i
CL
Rs
INPUT A-
90%
50%
10%
tfi
tro
A-
TxDRs
Rs = 39Ω
CL = 50pF
B-
OUTPUT B
10%
90%
50%
tskew_o
CL
OUTPUT B-
90%
50%
10%
tfo
|tro - tri| DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
|tfo - tfi|
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
|tskew_o| CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
|tskew_i| CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
Figure 2. Output Signal Skew
6
_______________________________________________________________________________________
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
∆VOUT
VCC
RGEN
VOUT
COM_
NO_
VOUT
CL
V GEN
GND
MAX4854H/MAX4854HL
V CC
MAX4854H
IN_
MAX4854HL
OFF
ON
IN_
VIL TO VIH
ON
OFF
IN_
MAX4854H
OFF
OFF
Q = ∆V OUT x C L
Figure 3. Charge Injection
+5V 10nF
V
OFF-ISOLATION = 20log OUT
VIN
NETWORK
ANALYZER
VCC
0V OR VCC
50Ω
VIN
COM1
IN_
MAX4854H/
MAX4854HL NO1*/
VOUT
V
ON-LOSS = 20log OUT
VIN
50Ω
MEAS
REF
V
CROSSTALK = 20log OUT
VIN
NC1
GND
50Ω
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" OR NO_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" OR NO_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK THIS PIN IS NO2.
COM2 IS OPEN.
Figure 4. On-Loss, Off-Isolation, and Crosstalk
Chip Information
10nF
TRANSISTOR COUNT: 735
PROCESS: CMOS
V CC
VCC
COM_
MAX4854H/
MAX4854HL
IN
CAPACITANCE
METER
VIL OR VIH
NO_
f = 1MHz
GND
Figure 5. Channel Off-/On-Capacitance
_______________________________________________________________________________________
7
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
12x16L QFN THIN.EPS
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
D2
0.10 M C A B
b
D
D2/2
D/2
E/2
E2/2
CL
(NE - 1) X e
E
E2
L
k
e
CL
(ND - 1) X e
CL
CL
0.10 C
0.08 C
A
A2
A1
L
L
e
e
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
E
21-0136
1
2
EXPOSED PAD VARIATIONS
DOWN
BONDS
ALLOWED
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
2
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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