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 applications, 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 microcontroller to control various inductive or incandescent loads.

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 RDS(on) of 1.6 Ω at TJ - 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 (IPWR) of 25 µA

• Maximum of 4.0 mA IDD During Operation