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 controlsvarious inductive, incandescent, or LED loads by directly interfacing with a microcontroller.

Features

ï Designed to Operate 5.5 V ï 16-Bit SPI for Control and Fault Reporting, 3.3 V/5.0 V Compatible

ï Outputs Are Current Limited (0.5 A to 1.0 A) to Drive Incandescent Lamps

ï Output Voltage Clamp, +45 V (Low Side) and -20 V (High Side) During Inductive Switching

ï On/Off Control of Open Load Detect Current (LED Application)

ï Internal Reverse Battery Protection on VPWR

ï Loss of Ground or Supply Will Not Energize Loads or Damage IC

ï Maximum 5.0µA IPWRStandby Current at 13.0 V VPWR

ï RDS(ON) of 1.0 Ωat 25°C Typical

ï Short Circuit Detect and Current Limit with Automatic Retry

ï Independent Overtemperature Protection

ï Motorola Now Offers Pb-Free Packaging with the Suffix EK