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Low-voltage 16-bit I2C & SMBus I/O expander

Availability: 34,312


Package | PIN: WQFN (RTW) | 24
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.28
10-24 $1.15
25-99 $1.06
100-249 $0.93
250-499 $0.86
500-749 $0.72
750-999 $0.59
1000+ $0.54


  • I2C to Parallel Port Expander
  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
  • 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 3 µA
  • 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)

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Texas Instruments  TCA6416ARTWR

The TCA6416A is a 24-pin device that provides 16-bits of general purpose parallelinput/output (I/O) expansion for the two-line bidirectional I2C bus (orSMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V onthe I2C bus side (VCCI) and a power supply voltage ranging from 1.65 Vto 5.5 V on the P-port side (VCCP).

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