丝印：34978；Package：SOICW-EP；22 channel multiple switch detection interface with programmable wetting current

The 33978 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). This SMARTMOS device also features a 24-to-1 analog multiplexer for reading th

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