MC33978 interface equivalent, 22-channel multiple switch detection interface.
Fully functional operation from 4.5 V to 36 V
* Full parametric operation from 6.0 V to 28 V
* Low-power mode current IBATP = 30 μA and IDDQ = 10 μA
* 22 Swit.
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). Individually selectable input .
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