PCA9555
Overview
The PCA9555 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed for a wide voltage range of 2.3 V to 5.5 V with interrupt and default pull-up resistors on GPIOs.
- I²C-bus to parallel port expander
- Operating power supply voltage range of 2.3 V to 5.5 V
- Ultra low standby current consumption:
- 1 µA (maximum)
- Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- Vhys = 0.10 × VCC (typical)
- Noise filter on SCL and SDA inputs
- 5 V tolerant I/Os
- 16 I/O pins which power up configured in input state with weak pull-up resistor
- Open-drain active LOW interrupt output (INT)
