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TCA9509 Datasheet Level-Translating I2C and SMBUS Bus Repeater

Manufacturer: Texas Instruments

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General Description

This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems.

It can also provide bidirectional voltage-level translation (uptranslation/down-translation) between low voltages (down to 0.9 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications.

This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting.

Overview

Product Folder Order Now Technical Documents Tools & Software Support & Community TCA9509 SCPS225C – AUGUST 2011 – REVISED DECEMBER 2017 TCA9509 Level-Translating I2C and SMBUS Bus Repeater.

Key Features

  • 1 Two-Channel Bidirectional Buffer.
  • I2C Bus and SMBus Compatible.
  • Operating Supply Voltage Range of 2.7 V to 5.5 V on B side.
  • Operating Voltage Range of 0.9 V to 5.5 V on A-Side.
  • Voltage-Level Translation From 0.9 V to 5.5 V and 2.7 V to 5.5 V.
  • Active-High Repeater-Enable Input.
  • Requires No External Pullup Resistors on Lower-Voltage Port-A.
  • Open-Drain I2C I/O.
  • 5.5-V Tolerant I2C and Enable Input Support Mixed-Mode S.

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