MC33978 Description
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 currents are available in Normal and Low-power (LPM) modes, as needed for the application.
MC33978 Key Features
- 20 August 2024
- Full parametric operation from 6.0 V to 28 V
- Low-power mode current IBATP = 30 μA and IDDQ = 10 μA
- 22 Switch detection channels
- 14 Switch-to-Ground (SG) inputs
- 8 Programmable switch (SP) inputs
- Switch-to-Ground (SG) or Switch-to-Battery (SB)
- Operating switch input voltage range from -1.0 V to 36 V
- Programmable wetting operation (Pulse or Continuous)
- Selectable wake-up on change of state