
M
±80V Fault-Protected/Tolerant CAN
Transceivers for In-Car Applications
_______________________________________________________________________________________
7
MAX305_
V
BATT
R1
R1
CL
CL
7
2
1
14
RTH
CANL
CANH
RTL
TXD
INH
BATT
8
12
11
9
10
6
5
4
13
3
+5V
C
= 15pF
PROBE CAP INCLUDED
V
CC
EN
STB
WAKE
ERR
GND
RXD
C
BYPASS
Figure 2. Test Circuit for Dynamic Characteristics
V
TXD
V
CANL
V
CANH
V
DIFF
V
DIFF
= CANH - CANL
V
RXD
t
PDL
t
PDH
V
CC
/2
-5V
-3.2V
2.2V
0
1.4V
5V
GND
V
CC
Figure 1. Timing Diagram for Dynamic Characteristics
MAX305_
+12V
125
CL
CL
7
2
1
14
8
12
11
9
10
6
5
4
13
3
+5V
C
= 15pF
PROBE CAP INCLUDED
511
125
511
RTH
CANL
CANH
RTL
WAKE
TXD
INH
BATT
ERR
GND
RXD
V
CC
EN
STB
C
BYPASS
Figure 3. Test Circuit for Typical Operating Characteristics
MAX305_
+12V
125
1nF
1nF
7
2
1
14
RTH
CANL
CANH
RTL
WAKE
TXD
INH
BATT
8
12
11
9
ERR
GND
RXD
10
6
5
4
13
3
V
CC
EN
STB
+5V
C
= 15pF
PROBE CAP INCLUDED
511
125
511
GENERATOR
1nF
1nF
C
BYPASS
Figure 4. Test Circuit for Automotive Transients
Timing Diagram/Test Circuits