TCA6408ARGTR

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TCA6408ARGTR

Low-Voltage 8-Bit I2C and SMBus I/O Expander

Packaging

Package | PIN: RGT | 16
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.11
10-24 $1.00
25-99 $0.93
100-249 $0.81
250-499 $0.75
500-749 $0.63
750-999 $0.51
1000+ $0.47

Features

  • 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 1 μA
  • 5-V Tolerant I/O Ports
  • 400-kHz Fast I2C Bus
  • Hardware Address Pin Allows Two TCA6408A Devices on the Same I2C/SMBus Bus
  • Active-Low Reset (RESET) Input
  • Open-Drain Active-Low Interrupt (INT) Output
  • 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
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs
  • ESD Protection Exceeds JESD 22
    • 2000-V Human Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)

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Texas Instruments  TCA6408ARGTR

The TCA6408A is a 16-pin device that provides 8-bits of general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. This device can operate with a power supply voltage ranging from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and on the P-port side (VCCP). This allows the TCA6408A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components such as LEDs remain at a 5-V power supply.

The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA6408A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so forth.