AMIS-4168X Datasheet, PDF (7/20 Pages) AMI SEMICONDUCTOR – Fault Tolerant CAN Transceiver

AMIS-4168x
Failure 1 : CANH wire interrupted
Vbat Vcc
RTL
TxD
RxD
ERR
CANL
CANH
RTH
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CH ^ERR
0.4Vcc
RTH
Error-detection: CL = CH more then 4 pulses
Failure 2 : CANL wire interrupted
Vbat Vcc
TxD
RxD
ERR
RTL
CANL
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CANH
CH ^ERR
RTH
0.4Vcc
RTH
Error-detection: CL = CH more then 4 pulses
Failure 3 : CANH shorted to Vbat
Vbat Vcc
TxD
RxD
ERR
RTL
CANL
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CANH
CH ^ERR
0.4Vcc
RTH
Vbat
RTH
Error-detection: CANH > 2V longer then Tnd_f3
Failure 3a : CANH shorted to Vcc
Vbat Vcc
Vcc
RTL
RTL
TxD
CANL
0.6Vcc
CANL
CL
CD
TxD
RxD
RxD
ERR
CANH
CANH
0.4Vcc
CH ^ERR
RTH
Vcc
RTH
Error-detection: CANH >2V longer then Tnd_f3
Failure 5 : CANH shorted to Gnd
Vbat Vcc
TxD
RxD
ERR
RTL
CANL
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CANH
CH ^ERR
0.4Vcc
RTH
GND ^RTH
Error-detection: CL = CH more then 4 pulses
Failure 4 : CANL shorted to Gnd
Vbat Vcc
RTL
TxD
RxD
ERR
CANL
CANH
RTH
GND
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CH ^ERR
0.4Vcc
RTH
Error-detection: dominant longer then Tnd_f4
Failure 6 : CANL wire shorted to Vbat
Vbat Vcc
RTL
TxD
RxD
ERR
CANL
CANH
RTH
Vbat
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CH ^ERR
0.4Vcc
RTH
Error-detection: CANL>7V
Failure 6a : CANL shorted to Vcc
Vbat Vcc
TxD
RxD
ERR
RTL
CANL
Vcc
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CANH
CH ^ERR
RTH
0.4Vcc
RTH
Error-detection: CL = CH more then 4 pulses
Failure 7 : CANH shorted to CANL
Vbat Vcc
RTL
TxD
RxD
ERR
CANL
CANH
RTH
RTL
0.6Vcc
CANL
CL
CD
TxD
RxD
CANH
CH ^ERR
0.4Vcc
RTH
Error-detection: dominant longer then Tnd_f7
Figure 5: Different Types of Wiring Failure
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