33982B Datasheet, PDF (3/34 Pages) Freescale Semiconductor, Inc – Single Intelligent High-Current Self-Protected Silicon High-Side Switch (2.0 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
HS
HS
Figure 3. 33982B Pin Connections
Table 1. Pin Definitions
Functional descriptions of many of these pins 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
This pin is used to output a current proportional to the high-side output
Monitoring
current and used externally to generate a ground-referenced voltage for
the microcontroller to monitor output current.
2
WAKE
Input
Wake
This pin is used to input a Logic [1] signal in order 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
IN
Input
Direct Input
The Input pin is used to directly control the output.
5
FS
Output
Fault Status
This is an open drain configured output requiring an external pullup
(Active Low)
resistor to V_DD 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 output after a watchdog time-out occurs.
7
CS
Input
Chip Select
This input pin is connected to a chip select output of a master
(Active Low)
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 in 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.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33982
3