PCA9539R Overview
PCA9539R is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc. PCA9539R consists of two 8-bit...
PCA9539R Key Features
- 16-bit I2C-bus GPIO with interrupt and reset
- Operating power supply voltage range of 2.3 V to 5.5 V (3.0 V to 5.5 V
- 5 V tolerant I/Os
- Polarity inversion register
- Active LOW interrupt output
- Active LOW reset input
- Low standby current
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
PCA9539R Applications
- 16-bit I2C-bus GPIO with interrupt and reset
- Operating power supply voltage range of 2.3 V to 5.5 V (3.0 V to 5.5 V
