Texas Instruments TCA9554
The TCA9554 is a 16-pin device that provides 8 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 ranging from 1.65 V to 5.5 V. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies.| Part No. | TCA9554 |
|---|---|
| Datasheet | TCA9554 Download |
| Manufacturer |  Texas Instruments |
| Description | Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander |
| Buy | Stock & Price |
FEATURES
●1 I2C to Parallel Port Expander● Open-Drain Active-Low Interrupt Output
● Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
● 5-V Tolerant I/O Ports
● 400-kHz Fast I2C Bus
● Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus
● Input and Output Configuration Register
● Polarity Inversion Register
● Internal Power-On Reset
● Low Standby Current Consumption
● Power-Up With All Channels Configured as Inputs
● No Glitch on Power Up
● Noise Filter on SCL/SDA Inputs
● Latched Outputs With High-Current Drive Maximum 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
● Personal Electronics (for example: Gaming Consoles)
● Industrial Automation
● Products With GPIO-Limited Processors 3
DESCRIPTION
I/O expanders such as the TCA9554 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.
