MC33291 Datasheet, PDF (1/24 Pages) Motorola, Inc – Eight Output Switch with Serial Peripheral Interface I/O

Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33291/D
Rev 2, 11/2002
Eight Output Switch with Serial
Peripheral Interface I/O
The 33291 device is an eight output, low side power switch with 8-bit serial
input control. The 33291 is a versatile circuit designed for automotive applica-
tions, but is well suited for other environments. The 33291 incorporates
SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry,
and DMOS power MOSFETs. The 33291 interfaces directly with a microcon-
troller to control various inductive or incandescent loads.
The circuit’s innovative monitoring and protection features include: Very
Low Standby Current, SPI Cascade Fault Reporting Capability, Internal 53 V
Clamp on Each Output, Output Specific Diagnostics, Independent Shutdown
of Outputs.
The device is parametrically specified over an ambient temperature range
of -40°C ≤ T_A ≤ 125°C and 9.0 V ≤ V_PWR ≤ 16 V supply.
Features:
• Designed to Operate Over Wide Supply Voltages of 5.5 to 26.5 V
• Interfaces to Microprocessor Using 8-Bit SPI I/O Protocol up to 3.0 MHz
• 1.0 A Peak Current Outputs with Maximum R_DS(on) of 1.6 Ω at T_J - 150°C
• Outputs Current Limited to Accommodate In-rush Currents Associated
with Switching Incandescent Loads
• Output Voltages Clamped to 53 V During Inductive Switching
• Maximum Sleep Current (I_PWR) of 25 µA
• Maximum of 4.0 mA I_DD During Operation
33291
EIGHT OUTPUT SWITCH
(SPI I/O)
Package Options
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
SOICW (16+4+4)
ORDERING INFORMATION
Device
Temperature
Range T_A
Package
MC33291DW
-40°C to 125°C
SOIC-24
MC33291DWR2 -40°C to 125°C
SOIC-24
33291 Simplified Application Schematic
SFPD
V_DD
Micro-
controller
SFPD
CS
SCLK
CMOS
Input
Logic
SI
RST
SO
CMOS
Serial
Shift
Registers
and
Latches
V_PWR
Output 0
Output 1
Updrain
DMOS
Output
Switches
and
Sense
Circuits
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
GND
This device contains 1266 active transistors.
+V_BAT
© Motorola, Inc. 2002
For More Information On This Product,
Go to: www.freescale.com