Analog Integrated Circuit Device Data

4

Freescale Semiconductor

33911

PIN CONNECTIONS

12

WDCONF

Watchdog

Configuration Pin

This input pin is for configuration of the watchdog period and

allows the disabling of the watchdog.

13

LIN

LIN Bus

This pin represents the single-wire bus transmitter and receiver.

14

LGND

LIN Ground Pin

This pin is the device LIN ground connection. It is internally connected to the

PGND pin.

17

19

LS2

LS1

Low Side Outputs

Relay drivers low side outputs.

18

PGND

Power Ground Pin

This pin is the device low side ground connection. It is internally connected to

the LGND pin.

22

23

L2

L1

Wake-Up Inputs

These pins are the wake-up capable digital inputs(1). In addition, all LX inputs

can be sensed analog via the analog multiplexer.

25

HS1

High Side Output

High side switch output.

26

27

VS2

VS1

Power Supply Pin

These pins are device battery level power supply pins. VS2 is supplying the

HS1 driver while VS1 supplies the remaining blocks.(2)

29

VSENSE

Voltage Sense Pin

Battery voltage sense input. (3)

31

VDD

Voltage Regulator

Output

+5.0V main voltage regulator output pin. (4)

32

AGND

Analog Ground Pin

This pin is the device analog ground connection.

Notes

1.

When used as a digital input, a series 33k

Ω resistor must be used to protect against automotive transients.

2.

Reverse battery protection series diodes must be used externally to protect the internal circuitry.

3.

This pin can be connected directly to the battery line for voltage measurements. The pin is self-protected against reverse battery

connections. It is strongly recommended to connect a 10k

Ω resistor in series with this pin for protection purposes.

4.

External capacitor (2µF < C < 100µF; 0.1

Ω < ESR < 10Ω) required.

Table 1. 33911 Pin Definitions

Pin

Pin Name

Formal Name

Definition