PCA9539 Overview
The PCA9539 provides 16 bits of General Purpose Input/Output (GPIO) expansion with interrupt and reset for I²C-bus/SMBus applications. It is designed for a wide voltage range of 2.3 V to 5.5 V. Nexperia GPIO expanders provide an elegant solution when additional IOs are needed while keeping the interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs and fan control.
PCA9539 Key Features
- 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
- 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
- Open-drain active LOW interrupt output (INT)
PCA9539 Applications
- I²C-bus to parallel port expander
- Operating power supply voltage range of 2.3 V to 5.5 V
