33984 Datasheet, PDF (4/38 Pages) Freescale Semiconductor, Inc – Dual Intelligent High-current Self-protected Silicon High Side Switch (4.0 mOhm)

PIN CONNECTIONS
PIN CONNECTIONS
12 11 10 9 8 7 6 5 4 3 2 1
13
GND
14
VPWR
TRANSPARENT
TOP VIEW
15
16
HS1
HS0
Figure 3. 33984 Pin Connections (Transparent Top View)
Table 2. Pin Definitions
Functional descriptions of many of these pins can be found in the Functional Pin Description section beginning on page 17.
Pin
Pin Name
Pin
Function
Formal Name
Definition
1
CSNS
Output Output Current Monitoring ^{This pin is used to output a current proportional to the designated}
HS0-1 output.
2
WAKE
Input
Wake
This pin is used to input a Logic [1] signal so as to enable the
watchdog timer function.
3
RST
Input
Reset (Active Low)
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.
4
IN0
Input
Direct Input 0
This input pin is used to directly control the output HS0.
5
FS
Output
Fault Status (Active Low) ^{This is an open drain configured output requiring an external pull-up}
resistor to VDD for fault reporting.
6
FSI
Input
Fail-safe Input
The value of the resistance connected between this pin and ground
determines the state of the outputs after a watchdog timeout occurs.
7
CS
Input
Chip Select (Active Low) This input pin is connected to a chip select output of a master
microcontroller (MCU).
8
SCLK
Input
Serial Clock
This input pin is connected to the MCU providing the required bit shift
clock for SPI communication.
9
SI
Input
Serial Input
This 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.
10
VDD
Input
Digital Drain Voltage
This is an external voltage input pin used to supply power to the SPI
(Power)
circuit.
33984
4
Analog Integrated Circuit Device Data
Freescale Semiconductor