PIN CONNECTIONS
Table 2. 33903/4/5 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 30.
Pin #
Pin #
Pin #
Pin #
Pin Name
Pin Function Formal Name
Definition
33905D 33905S 33904 33903
No Connection
1-3,20-
22,27-
30,32-
N/A
17, 18, 2-4,11-
N/C
No Connect
-
19
13, 17-
21, 31,
32
35,52-54
Supply input for the device internal supplies,
power on reset circuitry and the VDD regulator.
4
5
6
1
2
3
1
2
3
1
VSUP1
VSUP2
Power
Power
Battery Voltage
Supply 1
Supply input for 5 V-CAN regulator, VAUX
regulator, I/O and LIN pins.
2
Battery Voltage
Supply 2
33905D, Output pin for the LIN2 master node
termination resistor.
N/A
LIN-T2
or
Output
or
LIN Termination
2
or
or
I/O-3
Input/Output
33904/33905S, Configurable pin as an input or
high side output, for connection to external
Input/Output 3
circuitry (switched or small load). The input can be
used as a programmable wake-up input in Low
Power mode. When used as a high side, no over-
temperature protection is implemented. A basic
short to GND protection function, based on switch
drain-source over-voltage detection, is available.
33905D, Output pin for the LIN1 master node
termination resistor.
7
4
4
N/A
LIN-T1
or
Output
or
LIN Termination
1
or
or
33905S, 33905D, Configurable pin as an input or
high side output, for connection to external
LIN-T
Input/Output Input/Output 2
circuitry (switched or small load). The input can be
used as a programmable wake-up input in Low
Power mode. When used as a high side, no over-
temperature protection is implemented. A basic
short to GND protection function, based on switch
drain-source over-voltage detection, is available.
I/O-2
I/O-2
33904, Configurable pin as input or high side
output, for connection to external circuitry
(switched or small load). Input can be used as a
programmable wake-up input from Low Power
mode. When used as high side, no over-
temperature protection is implemented. A basic
short to GND protection function based on switch
drain-source over-voltage detection is available.
Output of the safe circuitry. The pin is asserted
LOW in case of a safe condition is detected (e.g.:
software watchdog is not triggered, VDD low, issue
on the RESET pin, etc.). Open drain structure.
8
9
5
6
5
6
5
6
SAFE
Output
Output
Safe Output
(Active LOW)
Output voltage for the embedded CAN interface.
A capacitor must be connected to this pin.
5 V-CAN
5V-CAN
CAN high output.
10
11
12
13
7
8
7
8
7
8
CANH
CANL
Output
Output
Ground
Output
CAN High
CAN Low
CAN low output.
Power GND of the embedded CAN interface
9
9
9
GND-CAN
SPLIT
GND-CAN
SPLIT Output
Output pin for connection to the middle point of the
split CAN termination
10
10
10
Output pin for external path PNP transistor base
14
11
11
N/A
VBAUX
Output
VB Auxiliary
33903/4/5
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