PIN CONNECTIONS
Table 1. 33912 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 21.
Pin
Pin Name
Formal Name
Definition
This input pin is for configuration of the watchdog period and allows the
disabling of the watchdog.
Watchdog
Configuration Pin
12
13
14
WDCONF
LIN
This pin represents the single-wire bus transmitter and receiver.
LIN Bus
This pin is the device LIN ground connection. It is internally connected to the
PGND pin.
LGND
LIN Ground Pin
15
16
ISENSEL
ISENSEH
Current Sense differential inputs.
Relay drivers low side outputs.
Current Sense Pins
17
19
LS2
LS1
Low Side Outputs
Power Ground Pin
This pin is the device low side ground connection. It is internally connected to
the LGND pin.
18
PGND
20
21
22
23
L4
L3
L2
L1
These pins are the wake-up capable digital inputs(1). In addition, all Lx inputs
can be sensed analog via the analog multiplexer.
Wake-Up Inputs
24
25
HS2
HS1
High side switch outputs.
High Side Outputs
26
27
VS2
VS1
These pins are device battery level power supply pins.VS2 is supplying the
HSx drivers while VS1 supplies the remaining blocks.(2)
Power Supply Pin
Voltage Sense Pin
Battery voltage sense input.(3)
29
30
VSENSE
HVDD
Hall Sensor Supply
Output
+5.0V switchable supply output pin.(4)
Voltage Regulator
Output
+5.0V main voltage regulator output pin.(5)
31
32
VDD
This pin is the device analog ground connection.
AGND
Analog Ground Pin
Notes
1. When used as digital input, a series 33kΩ 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 10kΩ resistor in series with this pin for protection purposes.
4. External capacitor (1µF < C < 10µF; 0.1Ω < ESR < 5Ω) required.
5. External capacitor (2µF < C < 100µF; 0.1Ω < ESR < 10Ω) required.
33912
Analog Integrated Circuit Device Data
Freescale Semiconductor
4
FREESCALE [ Freescale ]
