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PCA9522 - Fast dual bidirectional bus buffer

General Description

The PCA9522 is a monolithic bipolar integrated circuit for bus buffering in applications including I2C-bus, SMBus, etc.

It includes hot insertion logic for detecting stop and idle conditions, making it ideal for live insertion into backplanes.

Key Features

  • Dual, bidirectional unity gain isolating buffer.
  • Hot insertion logic prevents data and clock bus corruption for live backplane.

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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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PCA9522 Fast dual bidirectional bus buffer with hot insertion logic Rev. 1 — 28 September 2011 Product data sheet 1. General description The PCA9522 is a monolithic bipolar integrated circuit for bus buffering in applications including I2C-bus, SMBus, etc. It includes hot insertion logic for detecting stop and idle conditions, making it ideal for live insertion into backplanes. The buffer extends the bus load limit by buffering both the SCL and SDA lines. The PCA9522 is a drop-in replacement for the IES5502, with only the maximum bus voltage reduced from 15 V to 10 V. Hot insertion logic allows the IC to be plugged into live backplanes without causing data corruption on the bus. The open-collector ready signal (RDY) indicates when the connection has been made.