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TCA9545A - Low Voltage 4-channel I2C and SMbus Switch

General Description

The TCA9545A is a quad bidirectional translating switch controlled via the I2C bus.

The SCL/SDA upstream pair fans out to four downstream pairs, or channels.

Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register.

Key Features

  • 1 1-of-4 Bidirectional translating switches.
  • I2C bus and SMBus compatible.
  • Four active-low interrupt inputs.
  • Active-low interrupt output.
  • Active-low reset input.
  • Two address terminals, allowing up to four devices on the I2C bus.
  • Channel selection via I2C bus, in any combination.
  • Power-up with all switch channels deselected.
  • Low RON switches.
  • Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Product Folder Order Now Technical Documents Tools & Software Support & Community TCA9545A SCPS204D – JANUARY 2014 – REVISED NOVEMBER 2019 TCA9545A Low Voltage 4-channel I2C and SMbus Switch With Interrupt Logic and Reset Functions 1 Features •1 1-of-4 Bidirectional translating switches • I2C bus and SMBus compatible • Four active-low interrupt inputs • Active-low interrupt output • Active-low reset input • Two address terminals, allowing up to four devices on the I2C bus • Channel selection via I2C bus, in any combination • Power-up with all switch channels deselected • Low RON switches • Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses • No glitch on power-up • Supports hot insertion • Low standby current • Operating power-supply voltage range of 1.