33894 Datasheet, PDF (3/28 Pages) Freescale Semiconductor, Inc – Quad High-Side Switch

Transparent Top View of Package
PIN CONNECTIONS
PIN CONNECTIONS
13 12 11 10 9 8 7 6 5 4 3 2 1
SO 16
GND 17
HS3 18
14
GND
24 FSI
23 GND
22 HS2
15
VPWR
19
20
21
HS1
NC
HS0
Figure 3. 33894 Pin Connections
Table 1. 33894 Pin Definitions
Functional descriptions of many of these pins can be found in Functional Description on page 16.
Pin Number Pin Name
Formal Name
Definition
1
CSNS
Output Current
The Current Sense pin sources a current proportional to the designated HS0 : HS3
Monitoring
output. That current is fed into a ground-referenced resistor and its voltage is monitored
by an MCU's A/D. The output to be monitored is selected via the SPI. This pin can be
tri-stated through SPI.
2
IN0
Serial Inputs
The IN0:IN3 high-side input pins are used to directly control HS0:HS3 high-side output
3
IN1
pins, respectively. An SPI register determines if each input is activated or if the input
5
IN2
logic state is OR ed or AND ed with the SPI instruction. These pins are to be driven with
6
IN3
5.0 V CMOS levels, and they have an active internal pulldown current source.
4, 20
NC
No Connect
These pins may not be connected.
7
FS
Fault Status
This pin is an open drain configured output requiring an external pullup resistor to VDD
(Active Low)
for fault reporting. If a device fault condition is detected, this pin is active LOW. Specific
device diagnostic faults are reported via the SPI SO pin.
8
WAKE
Wake
This input pin controls the device mode and watchdog timeout feature if enabled. An
internal clamp protects this pin from high damaging voltages when the output is current
limited with an external resistor. This input has a passive internal pulldown.
9
RST
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. The pin also starts the watchdog timer
when transitioning from logic [0] to logic [1]. This pin should not be allowed to be
logic [1] until V_DD is in regulation. This pin has a passive internal pulldown.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33894
3