Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
TJA1054A
TEST AND APPLICATION INFORMATION
+
5 V
handbook, full pagewidth
V
INH
BAT
CC
1
14
10
R1
C1
C2
WAKE
TXD
STB
EN
RTH
7
2
5
6
3
8
CANL
12
TJA1054A
CANH
RTL
11
9
RXD
R1
C1
13
GND
4
20 pF
ERR
MGU381
Termination resistors R1 (100 Ω) are not connected to pin RTH or pin RTL for testing purposes because the minimum load allowed on
the CAN bus lines is 500 Ω per transceiver.
The capacitive bus load of 10 nF is split into 3 equal capacitors (3.3 nF) to simulate the bus cable.
Fig.5 Test circuit for dynamic characteristics.
+
12 V
handbook, full pagewidth
+
5 V
10 µF
V
INH
BAT
CC
1
14
10
1 nF
1 nF
125 Ω
511 Ω
WAKE
TXD
STB
EN
RTH
7
2
5
6
3
8
CANL
12
GENERATOR
TJA1054A
CANH
RTL
11
9
1 nF
1 nF
511 Ω
125 Ω
RXD
13
GND
4
20 pF
ERR
MGU382
The waveforms of the applied transients on pins CANH and CANL will be in accordance with “ISO 7637 part 1”: test pulses 1, 2, 3a and 3b.
Fig.6 Test circuit for automotive transients.
2004 Mar 23
16
NXP [ NXP ]
