Analog Integrated Circuit Device Data

Freescale Semiconductor

3

33874

PIN CONNECTIONS

PIN CONNECTIONS

Figure 3. 33874 Pin Connections

Table 1. 33874 Pin Definitions

A functional description of each pin can be found in the Functional Pin Description section beginning on page 15.

Pin

Number

Pin Name

Pin

Function

Formal Name

Definition

1

CSNS

Output

Output Current

Monitoring

The Current Sense pin sources a current proportional to the designated

HS0

2

3

5

6

IN0

IN1

IN2

IN3

Input

Parallel Inputs

The IN0:IN3 high side input pins are used to directly control HS0:HS3 high

side output pins, respectively.

4

TEMP

Output

Temperature

Feedback

This pin reports an analog value proportional to the temperature of the GND

flag (pins 14, 17, 23). It is used by the MCU to monitor board temperature.

7

FS

Output

Fault Status

(Active Low)

This pin is an open drain configured output requiring an external pull-up

resistor to VDD for fault reporting.

8

WAKE

Input

Wake

This input pin controls the device mode and watchdog timeout feature if

enabled.

9

RST

Input

Reset

This input pin is used to initialize the device configuration and fault registers,

as well as place the device in a low-current Sleep Mode.

10

CS

Input

Chip Select

(Active Low)

This input pin is connected to a chip select output of a master microcontroller

(MCU).

11

SCLK

Input

Serial Clock

This input pin is connected to the MCU providing the required bit shift clock for

SPI communication.

12

SI

Input

Serial Input

This pin is a command data input pin connected to the SPI Serial Data Output

of the MCU or to the SO pin of the previous device of a daisy

13

VDD

Power

Digital Drain Voltage

(Power)

This pin is an external voltage input pin used to supply power to the SPI circuit.

Transparent Top View of Package

13

24

12

10 9

8

7

6

5

4

321

11

23

22

19

20

21

16

17

18

15

14

SO

GND

HS3

HS1

NC

HS0

HS2

GND

FSI

GND

VPWR