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Freescale Semiconductor
Technical Data
Configurable Octal Serial Switch
with Serial Peripheral Interface
I/O
The 33880 device is an 8-output hardware configurable high side/
low side switch with 8-bit serial input control using the serial peripheral
interface (SPI). Two of the outputs can be controlled directly via
microcontroller for pulse-width modulation (PWM) applications.
The 33880 controls various inductive or incandescent loads by
directly interfacing with a microcontroller.
The circuit's innovative monitoring and protection features include
very low standby currents, “cascadable” fault reporting, internal 40 V
output clamping for low side configurations, internal -20 V output
clamping for high side configurations, output specific diagnostics, and
Document Number: MC33880
Rev. 8.0, 5/2012
33880
HIGH/LOW SIDE SWITCH
independent shutdown of outputs.
Features
? Designed to operate 5.5 V < V PWR < 24.5 V
? 8-bit SPI for control and fault reporting, 3.3/ 5.0 V compatible
EG SUFFIX (PB-FREE)
98ASB42345B
28-PIN SOICW
EW SUFFIX (PB-FREE)
98ARH99137A
32-PIN SOICW
? Outputs are current limited (0.8 A to 2.0 A) to drive incandescent
lamps
ORDERING INFORMATION
? Output voltage clamp is +45 V (typical) (low side drive) and -20 V
(typical) (high side drive) during inductive switching
? Internal reverse battery protection on V PWR
? Loss of ground or supply will not energize loads or damage IC
? Maximum 5.0 μ A I PWR standby current at 13 V V PWR up to 95 ° C
? R DS(ON) of 0.55 Ω at 25 ° C typical
Device
(For Tape and Reel, add
an R2 Suffix)
MC33880PEG
MC33880PEW
Temperature
Range (T A )
-40 ° C to 125 ° C
Package
28 SOICW
32 SOICW
? Short circuit detect and current limit with autoretry
? Independent over-temperature protection
? 32-pin SOICW has pins 8, 9, 24, and 25 grounded for thermal
performance
V PWR
33880
VS
5.0 V
5.0 V
VPWR
VDD
D1
D2
D3
D4
High-Side
D5
D6
EN
D7
MCU
SPI I/O
CS
SCLK
DI
D8
S1
S2
S3
MOT
H-Bridge
DO
S4
PWM
IN5
IN6
S5
S6
S7
GND
S8
Low-Side
All Output Switches are High- or Low-Side Configurable
Figure 1. 33880 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
? Freescale Semiconductor, Inc., 2009-2012. All rights reserved.
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