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NCV7441
Dual High Speed Low
Power CAN Transceiver
The NCV7441, dual CAN transceiver offers two fully independent high−speed CAN transceivers which can be individually connected to two CAN protocol controllers. The CAN channels can be separately put to normal or to standby mode, in which remote wakeup detection from the bus is possible.
Due to the shared auxiliary circuitry and common package, this circuit version can replace two standard high−speed CAN transceivers while saving board space.
Features
•
Compatible with the ISO 11898 Standard (ISO 11898−2, ISO
11898−5 and SAE J2284)
•
Low Quiescent Current
•
High Speed (up to 1 Mbps)
•
Ideally Suited for 12 V and 24 V Industrial and Automotive
Applications
•
Extremely Low Current Standby Mode with Wakeup Via the Bus
•
Low EME without Common−mode Choke
•
No Disturbance of the Bus Lines with an Un−powered Node
•
Predictable Behavior Under All Supply Circumstances
•
Transmit Data (TxD) Dominant Time−out Function
•
Thermal Protection
•
Bus Pins Protected Against Transients in an Automotive
Environment
•
Power Down Mode in Which the Transmitter is Disabled
•
Bus and V
SPLIT
Pins Short Circuit Proof to Supply Voltage and
Ground
•
Input Logic Levels Compatible with 3.3 V Devices
•
Up to 110 Nodes can be Connected to the Same Bus in Function of
Topology
•
Pb−Free Packages are Available
Typical Applications
•
Automotive
•
Industrial Networks
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MARKING
DIAGRAM
14
1
SOIC−14 NB
CASE 751A
14
NCV7441−0
AWLYWWG
1
XXXXX = Specific Device Code
A
WL
Y
WW
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
TxD1
1
PIN CONNECTIONS
14
STB1
RxD1
2 13
CANH1
GND
3
VCC
4
GND 5
RxD2 6
TxD2 7
12
CANL1
11
TEST/GND
10
CANH2
9
CANL2
8
STB2
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 9 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
August, 2011 − Rev. 0
1
Publication Order Number:
NCV7441/D
CANH1
CANL1
Transmitter
Receiver
Low−power receiver
V
CC
V
CC
NCV7441
BLOCK DIAGRAM
NCV7441
Dual CAN
SUPPLY
MONITOR
THERMAL
MONITOR
Transmitter
V
CC
CANH2
CANL2
Receiver
V
CC
Low −power receiver
V
CC
PD20100615.01
Figure 1. NCV7441 Dual CAN: Block Diagram
13
14
11
12
9
10
7
8
Table 1. PIN FUNCTION DESCRIPTION
Pin
Number
1
2
Pin
Name
TxD1
RxD1
Pin Type
digital input; internal pull−up digital output
3
4
5
6
GND
V
CC
GND
RxD2 ground supply input ground digital output
TxD2
STB2
CANL2
CANH2
TEST /
GND
CANL1
CANH1
STB1 digital input; internal pull−up digital input; internal pull−up high−voltage analog input/output high−voltage analog input/output test/ground high−voltage analog input/output high−voltage analog input/output digital input; internal pull−up
Description
transmit data for the 1 st mode
CAN channel in normal mode; ignored in standby received data from the 1 st
CAN channel in normal mode; 1 st
CAN channel remote wakeup indication in standby mode ground connection
5 V supply connection ground connection received data from the 2 nd indication in standby mode
CAN channel; 2 nd
CAN channel remote wakeup transmit data for the 2 nd
CAN channel mode control input for the 2 nd channel into standby mode
CAN channel; STB2 = High puts the 2 nd
CAN
CANL−wire connection of the 2 nd
CAN channel
CANH−wire connection of the 2 nd
CAN channel
The pin is used for test purposes during device production. It’s recommended to connect to ground in the end−application.
CANL−wire connection of the 1 st
CAN channel
CANH−wire connection of the 1 st
CAN channel mode control input for the 1 st
STB1 = High puts the 1 st
CAN channel;
CAN channel into standby mode
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2
NCV7441
TYPICAL APPLICATION DIAGRAM
VBAT
LDO
5V
GND
MCU + CAN ctrl.
1
MCU + CAN ctrl.
2
STB1
TxD1
RxD1
V
CC
STB2
TxD2
RxD2
TEST/
GND
NCV7441−0
Dual CAN
GND
CANH1
CANL1
CANH2
CANL2
PD20100615.03
Figure 2. NCV7441 Dual CAN: Example Application Diagram
FUNCTIONAL DESCRIPTION
Dual CAN device behaves identically to two independent CAN transceivers. The representative signal dependencies are
shown in Figure 4 and further functional description is given in Table 2.
Table 2. FUNCTIONAL DESCRIPTION
V
CC
< V
CC_UV
STB1/2 TxD1/2
X X
RxD1/2
HZ
> V
CC_UV
High X Low−power receiver output
Low High Indicates the signal received on CAN1/2
Low Low
Transceiver on CANH1/2/CANL1/2
Deactivated; unbiased
Transmitter deactivated;
Bus biased to GND through the input circuitry;
Receiver monitoring CAN1/2 wakeup
Recessive signal transmitted on CAN1/2;
Bus biased to V
CC
/2 through the input circuitry
Dominant signal transmitted on CAN1/2;
Bus biased to V
CC
/2 through the input circuitry
Comment
The entire chip in under−voltage
CAN1/2 in standby mode
CAN1/2 in normal mode
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3
NCV7441
If the main power supply V
CC
(nominal 5 V) is above its under−voltage (V
CC_UV
) level, each CAN channel can enter either normal mode (when the corresponding STB1/2 digital input is pulled Low) or standby mode (when the corresponding STB1/2 signal is left High):
•
In the normal mode:
♦
♦
♦
♦
The bus transceiver is ready to transmit and receive CAN bus signals with the full CAN communication speed (up to
1 Mbps) and thus interconnect the CAN bus with the corresponding CAN controller through digital pins TxD1/2 and
RxD1/2
The bus pins are internally biased to typically V
CC
/2 through the input circuitry
TxD1/2 input pin is monitored by a timeout in order to prevent a permanent dominant being forced to the bus thus preventing other nodes from communicating. If TxD1/2 is Low for longer than t cnt(timeout)
, the transmitter switches back to recessive. Only when TxD1/2 returns to High, the timeout counter is reset and the transmitter is ready to transmit dominant symbols again. The TxD1/2 timeout protection is implemented individually for both CAN transceivers.
A common thermal monitoring circuit compares the circuit junction temperatures with threshold T
J(sd)
. If the thermal shutdown level is exceeded, dominant transmission is disabled. The circuit remains biased and ready to transmit but the logical path from TxD1/2 pin(s) is blocked. The transmission is again enabled when the junction temperature decreases below the shutdown level and the TxD1/2 pin returns to the High level, thus avoiding thermal oscillations.
•
In the standby mode:
♦
The respective transmitter is disabled and the current consumption of the channel is fundamentally reduced. Only the low−power receiver on the channel remains active in order to detect potential CAN bus wakeups. The logical signal
♦
♦ on TxD1/2 input is ignored.
The bus pins are biased to GND through the input circuitry
Digital output RxD1/2 signals the output of the low−power receiver and can be used as a wakeup signal in the application. A filtering time td
BUS
is applied between the bus activity and the RxD1/2 signal in order to ensure that only sufficiently long dominant signals on the bus will be propagated to the digital output. In addition, dominant bus signals are ignored in case they were present during normal−to−standby mode transition; in this way unwanted wakeups are avoided in case of permanent dominant failure on the bus. Example waveforms illustrating bus activity
detection in standby mode are shown in Figure 3.
In order to ensure a safe device state, the digital inputs STB1/2 and TxD1/2 are connected through internal pull−up resistors to V
CC
thus ensuring that both channels remain in standby mode and/or no dominant can be transmitted in case any of the digital inputs gets disconnected.
STB1
< t dbus w t dbus w t dbus
< t dbus
CANH/L1
RxD1
STB2
CANH/L2
RxD2
PD20100209.08
Figure 3. NCV7441 Dual CAN: Bus Activity Detection in Standby Mode
< t dbus w t dbus
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4
NCV7441
Figure 4. NCV7441 Dual CAN: Functional Graphs http://onsemi.com
5
NCV7441
Table 3. ABSOLUTE MAXIMUM RATINGS
Symbol
V max_VCC
V max_digIn
V max_digOut
Parameter
Supply voltage
Voltage at digital inputs. TxD1, TxD2, STB1, STB2
Voltage at digital outputs. RxD1, RxD2, TEST/GND
Min
−0.3
−0.3
−0.3
Max
6
6
(V
CC
+ 0.3)
Unit
V
V
V
V
V
V max_CANH1/2 max_CANL1/2 max_diffCAN
T
J(max)
ESD
Voltage on CANH1/2 pin; no time limit
Voltage on CANL1/2 pin ; no time limit
Absolute voltage difference between CAN pins: |V
(CANH1)
|V
(CANH2)
−V
(CANL2)
|
−V
(CANL1)
|;
Junction temperature
System ESD on CANH1/2 and CANL1/2 as per IEC 61000−4−2: 330 W / 150 pF
Human body model on CANH1/2 and CANL1/2 as per JESD22−A114 / AEC−
Q100−002
−50
−50
0
−40
−8
−8
+50
+50
50
170
8
8
V
V
V
°C kV kV
Human body model on other pins as per JESD22−A114 / AEC−Q100−002 −4 4 kV
Charge device model on all pins as per JESD22−C101 / AEC−Q100−011 −500 500 V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Table 4. OPERATING RANGES
Symbol
V op_VCC
V op_digIn
V op_digOut
V op_CANH1/2
V op_CANL1/2
V op_diffCAN
T
J_op
Parameter
Supply voltage
Voltage at digital inputs. Dual CAN: TxD1, TxD2, STB1, STB2
Voltage at digital outputs. RxD1, RxD2
Voltage on CANH1/2 pin
Guaranteed receiver function
Voltage on CANL1/2 pin
Guaranteed receiver function
Absolute voltage difference between CAN pins:
|V
(CANH1)
− V
(CANL1)
|; |V
(CANH2)
− V
(CANL2)
|
Guaranteed receiver function
Junction temperature
Min
4.75
0
0
−35
35
0
−40
Max
5.25
V
CC
V
CC
35
35
35
150
Unit
V
V
V
V
V
V
°C
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NCV7441
Table 5. ELECTRICAL CHARACTERISTICS
currents flow into the respective pin.
Conditions Min Typ Max Unit Symbol Parameter
V
CC
SUPPLY ELECTRICAL CHARACTERISTICS
V
CC_UV
I
VCC_stdby
V
CC
under voltage level
V
CC
consumption
2.5
3.5
20
4.5
30
V mA
I
VCC_norm1
Both channels in standby mode; no wakeup detected; both buses recessive
TxD1 = TxD2 = High
One channel in normal mode;
TxD1 = TxD2 = High
3 5 11 mA
I
VCC_norm2
Both channels in normal mode;
TxD1 = TxD2 = High
DIGITAL INPUTS ELECTRICAL CHARACTERISTICS – PINS TxD1, TxD2
V
TxX_L
V
TxX_H
Low level input voltage
High level input voltage
6
−0.3
2
−75
10
−200
20
0.8
V
CC
0.3
+
−350 mA
V
V mA I
I
TxX_L
TxX_H
Low level input current
High level input current
V
CC
V
(TxX)
= 5 V
= GND
V
CC
V
= 0 ... 5.25 V
(TxX)
= 5 V
DIGITAL INPUTS ELECTRICAL CHARACTERISTICS – PINS STB1, STB2
V
STBX_L
V
STBX_H
Low level input voltage
High level input voltage
−0.5
−0.3
2
−1 −4
0.5
0.8
V
CC
0.3
+
−10 mA
V
V mA I
I
STBX_L
STBX_H
Low level input current
High level input current
V
CC
V
(STBX)
= 5 V
= GND
V
CC
= 0 ... 5.25 V
V
(STBX)
= 5 V
DIGITAL OUTPUTS ELECTRICAL CHARACTERISTICS – PINS RxD1, RxD2
I digOut_L
V
(digOut)
= 0.4 V
I digOut_H
Output current at Low output level
Output current at High output level
V
I digOut_stdby digOut_HZ
Output level in standby mode
Output current in High−impedance state at least one channel enabled
V
(digOut)
= V
CC
− 0.4 V both channels in standby;
I
(digOut)
= −100 mA during V
V
CC
undervoltage;
(digOut)
= 0 V ... V
CC
CAN TRANSMITTER CHARACTERISTICS
V o(reces)(CANH1/2) recessive bus voltage at pin CANH1/2
V
TxD1/2
= V
CC
; no load on the bus, normal mode no load on the bus; standby mode
V o(reces)(CANL1/2) recessive bus voltage at pin CANL1/2
V
TxD1/2
= V
CC
; no load on the bus, normal mode no load on the bus; standby mode
I
I o(reces)(CANH1/2) o(reces)(CANL1/2) recessive output current at pin CANH1/2 recessive output current at pin CANL1/2
−35 V < V
CANH1/2
0 V < V
CC
< 35 V;
< 5.25 V
−35 V < V
CANL1/2
0 V < V
CC
< 35 V;
< 5.25 V
−0.5
2
−0.1
V
CC
1.1
−
−2
2.0
−0.1
2.0
−0.1
−2.5
−2.5
6
−0.4
V
CC
0.7
−
0
2.5
0
2.5
0
−
−
0.5
12
−1
V
CC
0.4
−
2
3.0
0.1
3.0
0.1
2.5
2.5
mA mA mA
V mA
V
V mA mA
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NCV7441
Table 5. ELECTRICAL CHARACTERISTICS
currents flow into the respective pin.
Min Typ Max Unit Symbol Parameter
CAN TRANSMITTER CHARACTERISTICS
V o(dom)(CANH1/2)
V o(dom)(CANL1/2) dominant output voltage at pin CANH1/2 dominant output voltage at pin CANL1/2
V
V
Conditions
TXD1/2
TXD1/2
= 0 V
= 0 V
V
V o(dif)(BUS_dom) o(dif)(BUS_rec) differential bus output voltage
(V
CANH1/2
– V
CANL1/2
) differential bus output voltage
(V
CANH1/2
– V
CANL1/2
)
V
TXD1/2
= 0 V, dominant; bus differential load:
42.5 W < R
L
< 60 W
V
TXD1/2
= V
CC
Recessive, no load on the bus
I
I o(SC)(CANH1/2) o(SC)(CANL1/2) short−circuit output current at pin CANH1/2 short−circuit output current at pin CANL1/2
V
CANH1/2
V
TXD1/2
= 0 V,
= 0 V
V
CANL1/2
V
TXD1/2
= 36 V,
= 0 V
CAN RECEIVER AND CAN PINS ELECTRICAL CHARACTERISTICS
V
R
V
V i(dif)(th) ihcm(dif)(th) ihcm(dif)(hys) i(cm)CANH1/2
Differential receiver threshold voltage
Differential receiver threshold voltage for high common mode
Differential receiver input voltage hysteresis for high common mode
Common mode input resistance at pin CANH1/2 normal mode
−12 V < V
CANH1/2
< 12 V
−12 V < V
CANL1/2
< 12 V standby mode
−12 V < V
CANH1/2
< 12 V
−12 V < V
CANL1/2
< 12 V normal mode
−35 V < V
CANH1/2
< 35 V
−35 V < V
CANL1/2
< 35 V normal mode
−35 V < V
CANH1/2
< 35 V
−35 V < V
CANL1/2
< 35 V
3.0
0.5
1.5
−120
−100
45
0.5
0.4
0.4
20
15
3.6
1.4
2.25
0
−70
70
0.7
0.8
0.7
70
26
4.25
1.75
3.0
50
−45
100
0.9
1.15
1
100
37
V
V
V mV mA mA
V
V mV kW
R i(cm)CANL1/2
C
C
R i(cm)(m)
R i(dif)
I(CANH1/2)
I(CANL1/2)
Common mode input resistance at pin CANL1/2
Matching between pin
CANH1/2 and pin
CANL1/2 common mode input resistance
Differential input resistance input capacitance at pin
CANH1/2 input capacitance at pin
CANL1/2
V
CANH1/2
= V
CANL1/2
V
TxD1/2
= V
CC not tested in production
V
TxD1/2
= V
CC not tested in production
C
I(dif) differential input capacitance
I
LICANH1/2
Input leakage current to pin CANH1/2
V
V
CANL1/2
CC
= V
= 0 V;
CANH1/2
= 5 V
I
LICANL1/2
Input leakage current to pin CANL1/2
V
V
CANL1/2
CC
= V
= 0 V;
CANH1/2
= 5 V
THERMAL MONITORING ELECTRICAL CHARACTERISTICS
T
J(sd)
Thermal shutdown threshold
V
TxD1/2
= V
CC not tested in production
Junction temperature rising
Junction temperature falling
15
−3
25
−
−
−
−10
−10
150
145
26
0
50
7.5
7.5
3.75
0
0
37
3
75
20
20
10
10
10
185 kW
% kW pF pF pF mA mA
°C
°C
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NCV7441
Table 5. ELECTRICAL CHARACTERISTICS
currents flow into the respective pin.
Conditions Min Typ Max Unit Symbol Parameter
DYNAMIC ELECTRICAL CHARACTERISTICS
td
(TXD1/2−BUSOn) td
(TXD1/2−BUSOff) delay TxD1/2 to CAN1/2 bus active delay TxD1/2 to CAN1/2 bus inactive td
(BUSOn−RXD1/2) td td td
(BUSOff−RX0)
PD(TXD1/2−RXD1/2)dr
PD(TXD1/2−RXD1/2)rd td
BUS delay CAN1/2 bus active to RxD1/2 delay CAN1/2 bus inactive to RxD1/2 propagation delay TxD1/2 to RxD1/2; dominant−to−recessive propagation delay TxD1/2 to RxD1/2; recessive−to−dominant low−power receiver filtering time bus differential load 100 pF/60 W bus differential load 100 pF/60 W
C
RxD1/2
= 15 pF
C
RxD1/2
= 15 pF bus differential load 100 pF/60 W bus differential load 100 pF/60 W
20
25
30
30
75
0.5
85
30
55
100
2.5
120
105
105
105
245
230
5 ns ns ns ns ns ns ms td
WAKE
V standby mode dif(dom)
> 1.4 V
V standby mode dif(dom)
> 1.2 V standby mode; dominant longer than td
BUS
0.5
3 5.8
10 ms td
(nrm−stb) td
(stb−nrm) t cnt(timeout)
I digOut_HZ delay to flag bus wakeup; time from CAN bus dominant start to RxDx falling edge transition delay from
STB1/2 rising edge to
CAN1/2 standby mode transition delay from
STB1/2 falling edge to
CAN1/2 normal mode
TxD1/2 dominant time out
Output current in High−impedance state
V
TXD1/2
= 0 V pins RxD1,2 during V
V
(digOut)
CC
under−voltage;
= 0 V ... V
CC
300
−2
650
0
10
10
1000
2 ms ms ms mA
ORDERING INFORMATION
Device Description Temperature Range Package Shipping
†
NCV7441D20G
Dual HS−CAN Transceiver
*40°C to 125°C
SOIC−14
(Pb−Free)
55 Tube / Tray
NCV7441D20R2G 3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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9
14
H
1
0.25
M
B
M
e
D
NCV7441
PACKAGE DIMENSIONS
SOIC−14 NB
CASE 751A−03
ISSUE K
8
A
B
E
7
13X b
0.25
M C A S B S
A
DETAIL A
L h
X 45
_
A1
C
SEATING
PLANE
M
SOLDERING FOOTPRINT*
6.50
A3
DETAIL A
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION
SHALL BE 0.13 TOTAL IN EXCESS OF AT
MAXIMUM MATERIAL CONDITION.
4. DIMENSIONS D AND E DO NOT INCLUDE
MOLD PROTRUSIONS.
5. MAXIMUM MOLD PROTRUSION 0.15 PER
SIDE.
MILLIMETERS
DIM MIN
A
1.35
A1
0.10
MAX
INCHES
MIN MAX
1.75
0.054
0.068
0.25
0.004
0.010
h
L
M
A3
0.19
b
0.35
D
E
8.55
3.80
e
H
0.25
0.008
0.010
0.49
0.014
0.019
8.75
0.337
0.344
4.00
0.150
0.157
1.27 BSC
5.80
0.25
0.40
0
_
6.20
0.228
0.244
0.50
0.010
0.019
1.25
7
_
0.050 BSC
0.016
0
_
0.049
7
_
14X
1.18
1
1.27
PITCH
14X
0.58
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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For additional information, please contact your local
Sales Representative
NCV7441/D
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