MC33879 Datasheet, PDF (1/20 Pages) Motorola, Inc – Configurable Octal Serial Switch with Open Load Detect Current Disable

Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33879
Rev 3.0, 06/2004
Preliminary Information
33879
Configurable Octal Serial Switch
with Open Load Detect Current
Disable
The 33879 device is an 8-output hardware-configurable, high-side/low-side
switch with 16-bit serial input control. Two of the outputs may be controlled
directly via microprocessor for PWM applications. The 33879 incorporates
SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry, and
DMOS power MOSFETs. The 33879 controls various inductive, incandescent,
or LED loads by directly interfacing with a microcontroller. The circuit’s
innovative monitoring and protection features include very low standby
currents, cascade fault reporting, internal +45 V clamp voltage for low-side
configuration, -20 V high-side configuration, output-specific diagnostics, and
independent overtemperature protection.
CONFIGURABLE OCTAL SERIAL
SWITCH WITH OPEN LOAD
DETECT CURRENT DISABLE
Features
• Designed to Operate 5.5 V < V_PWR < 26.5 V
• 16-Bit SPI for Control and Fault Reporting, 3.3 V/5.0 V Compatible
• Outputs Are Current Limited (0.5 A to 1.0 A) to Drive Incandescent
Lamps
• Output Voltage Clamp, +45 V (Low Side) and -20 V (High Side) During
Inductive Switching
• On/Off Control of Open Load Detect Current (LED Application)
• Internal Reverse Battery Protection on V_PWR
• Loss of Ground or Supply Will Not Energize Loads or Damage IC
• Maximum 5.0 µA I_PWR Standby Current at 13.0 V V_PWR
• R_DS(ON) of 1.0 Ω at 25°C Typical
• Short Circuit Detect and Current Limit with Automatic Retry
• Independent Overtemperature Protection
• Motorola Now Offers Pb-Free Packaging with the Suffix EK
EK (Pb-FREE) SUFFIX
DWB SUFFIX
CASE 1437-01
32-LEAD SOICW-EP
ORDERING INFORMATION
Device
Temperature
Range (T_A)
Package
PC33879DWB/R2
-40°C to 125°C 32 SOICW-EP
PC33879EK/R2
33879 SSiimmpplifliiefdieAdppAlipcpatliiocnaDtiioagnraDmiagram
VPWR
+5.0 V
VBAT
33879
MCU
A0
MOSI
SCLK
CS
MISO
PWM1
PWM2
VDD VPWR
D1
D2
D3
EN
D4
DI
S1
SCLK
S2
CS
S3
S4
DO
IN5
D5
IN6
D6
D7
D8
S5
GND
S6
S7
S8
High-Side Drive
M H-Bridge Configuration
VBAT _VBAT
Low-Side Drive
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2004
For More Information On This Product,
Go to: www.freescale.com