• I2C to Parallel Port Expander
• Operating Power-Supply Voltage Range of 1.65V to 5.5V
• Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C Bus and P-Ports
• Low Standby Current Consumption of 3μA
• 5-V Tolerant I/O Ports
• 400-kHz Fast I2C Bus
• Hardware Address Pin Allows Two TCA6416A Devices on the Same I2C/SMBus Bus
• Active-Low Reset Input (RESET)
• Open-Drain Active-Low Interrupt Output (INT)
• Input/Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset
• 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)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)

• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics (For Example, Gaming Consoles)
• Industrial Automation
• Products With GPIO-Limited Processors

The TCA6416A is a 24-pin device that provides 16-bits of general purpose parallel input/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 1.65V to 5.5V on the I2C bus side (VCCI) and a power supply voltage ranging from 1.65V to 5.5V on the P-port side (VCCP).

The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA6416A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, etc.