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TCA9538 Datasheet Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

Manufacturer: Texas Instruments

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General Description

The TCA9538 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.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TCA9538 SCPS199D – AUGUST 2014 – REVISED OCTOBER 2016 TCA9538 Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander with Interrupt.

Key Features

  • 1 Low Standby Current Consumption.
  • I2C to Parallel Port Expander.
  • Open-Drain Active-Low Interrupt Output.
  • Active-Low Reset Input.
  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V.
  • 5-V Tolerant I/O Ports.
  • 400-kHz Fast I2C Bus.
  • Two Hardware Address Pins Allow up to Four Devices on the I2C/SMBus.
  • Input and Output Configuration Register.
  • Polarity Inversion Register.
  • Power-Up With All Channels Co.

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