Multiple Switch Detection Interface

Multiple Switch Detection InterfaceThe 33993 Multiple Switch Detection Interface is designed to detect the closing and opening of up to 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). The devic • Designed to Operate 5.5 V ≤ VPWR ≤ 26 V\n• Switch Input Voltage Range -14 V to VPWR, 40 V Max\n• Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol\n• Selectable Wake-Up on Change of State\n• Selectable Wetting Current (16 mA or 2.0 mA)\n• 8 Programmable Inputs (Switches to Batte;

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