PIN CONNECTIONS
PIN CONNECTIONS
Transparent Top View of Package
WAKE
TEMP
CSNS
1
24
14
GND
23
FSI
GND
22
HS2
Definition
The Current Sense pin sources a current proportional to the designated
HS0
:
HS3 output.
The IN0 : IN3 high-side input pins are used to directly control HS0 : HS3 high-
side output pins, respectively.
SCLK
VDD
RST
IN3
IN2
IN1
3
13 12 11 10
SO
GND
16
17
9
8
7
6
5
4
HS3
18
15
VPWR
19
HS1
20
NC
21
HS0
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
Pin
Number
1
2
3
5
6
4
7
8
9
10
11
12
13
Pin Name
CSNS
IN0
IN1
IN2
IN3
TEMP
FS
WAKE
RST
CS
SCLK
SI
VDD
Pin
Function
Output
Input
Formal Name
Output Current
Monitoring
Serial Inputs
Output
Output
Input
Input
Input
Input
Input
Power
Temperature
Feedback
Fault Status
(Active Low)
Wake
Reset
Chip Select
(Active Low)
Serial Clock
Serial Input
Digital Drain Voltage
(Power)
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.
This pin is an open drain configured output requiring an external pullup resistor
to VDD for fault reporting.
This input pin controls the device mode and watchdog timeout feature if
enabled.
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.
This input pin is connected to a chip select output of a master microcontroller
(MCU).
This input pin is connected to the MCU providing the required bit shift clock for
SPI communication.
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
-
chain of devices.
This pin is an external voltage input pin used to supply power to the SPI circuit.
IN0
2
CS
FS
SI
33874
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
