Texas Instruments TCA9539
The TCA9539 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.| Part No. | TCA9539 |
|---|---|
| Datasheet | TCA9539 Download |
| Manufacturer |  Texas Instruments |
| Description | Low Voltage 16-Bit I2C and SMBUS Low-Power I/O Expander |
| Buy | Stock & Price |
FEATURES
●1 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 100 mA Per JESD 78, Class II
● ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 1000-V Charged-Device Model (C101) 2
APPLICATIONS
● Servers● Routers (Telecom Switching Equipment)
● Personal Computers, smartphones
● Industrial Automation
● I2C GPIO Expansion 3
DESCRIPTION
I/O expanders such as the TCA9539 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.
