Uses 3.3V/5.0V SPI Protocol in Communicating with the MCU Serial Communication Error Checking through 8bit-CRC Thermal Shutdown Protection (TSD) Power on Reset (POR) Selectable Source/Sink Current Levels through Register Settings Wetting Current Timer Capability 8 Source or Sink Input Pins (VPUA) 14 Source Input Pins Separable Power Supply VPUA: 16ch (INA&INZ), VPUB: 6ch (INB) Interrupt Notification upon Switch Status Change 1 Time to 6 Times Matched LPF that Eliminates Input Pin Noise Low Current Consumption (Intermittent Monitoring) Status Display of Selected Pin at DMUX Pin