The NXP® MC33978 is a multiple switch detection interface (MSDI) 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 through a SPI in automotive environments.
|Device Function||Switch Monitoring|
|Package Type and Termination Count||QFN-EP 32, SOIC-EP 32|
|Load Supply Voltage (Min) (V) (Min) (V)||4.5|
|Load Supply Voltage (Max) (V) (Max) (V)||36|
|Interface and Input Control||SPI|
|Ambient Operating Temperature (Min-Max) (°C)||-40 to 125|