The TCA9539PWR is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus protocol). The device can operate with a power supply voltage (VCC) range from 1.65 V to 5.5 V. The device supports 100-kHz (I2C Standard mode) and 400-kHz (I2C Fast mode) clock frequencies. I/O expanders such as the TCA9539PWR provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.
The features of the TCA9539PWR include an interrupt that is generated on the RESET pin that can be used to reset the device to its default state.
Feature
I2C to Parallel Port Expander
Low Standby-Current Consumption
Open-Drain Active-Low Interrupt Output
Active-Low Reset Input
5-V Tolerant I/O Ports
Compatible With Most Microcontrollers
400-kHz Fast I2C Bus
Input and Output Configuration Register
Polarity Inversion Register
Internal Power-on Reset
No Glitch on Power Up
Noise Filter on SCL and SDA Inputs
Address by Two Hardware Address Pins for Use of up to Four Devices
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100mA Per JESD78, ClassII
ESD Protection Exceeds JESD22
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
