PCA9703 Key Features
- 16 general purpose input ports
- 18 V tolerant input ports with 100 k external series resistor
- Input LOW threshold 0.55 VDD with minimum of 2.5 V at VDD = 4.5 V
- Open-drain interrupt output
- Interrupt enable pin (INT_EN) disables GPI pins and interrupt output
- Interrupt-masking feature allows no interrupt generation from selected inputs
- VDD range: 4.5 V to 5.5 V
- IDD is very low 2.5 A maximum
- SPI serial interface with speeds up to 5 MHz
- SPI supports daisy-chain connection for large switch numbers