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PCA9525 - Simple 2-wire bus buffer

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General Description

The PCA9525 is a monolithic CMOS integrated circuit for bus buffering in applications including I2C-bus, SMBus, DDC, PMBus, and other systems based on similar principles.

The buffer extends the bus load limit by buffering both the SCL and SDA lines, allowing the maximum permissible bus capacitance on both sides of the buffer.

The PCA9525 includes a unidirectional buffer for the clock signal, and a bidirectional buffer for the data signal.

Overview

PCA9525 Simple 2-wire bus buffer Rev.

1 — 25 February 2011 Product data sheet 1.

Key Features

  • Simple impedance isolating buffer for 2-wire buses.
  • 4 mA maximum static open-drain pull-down capability supports a wide range of bus standards.
  • Works with I2C-bus (Standard-mode, Fast-mode), SMBus (standard and high power mode), and PMBus.
  • Fast switching times allow operation in excess of 1 MHz.
  • Enable allows bus segments to be disconnected.
  • Hysteresis on inputs provides noise immunity.
  • Operating voltages from 2.7 V to 5.5 V.

More Datasheets from NXP Semiconductors

Part Number Description
PCA9521 Fast dual bidirectional bus buffer
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PCA9527 3-channel bidirectional bus extender
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PCA9507 2-wire serial bus extender
PCA9510A Hot swappable I2C-bus and SMBus bus buffer
PCA9511A Hot swappable I2C-bus and SMBus bus buffer
PCA9513A Hot swappable I2C-bus and SMBus bus buffer
PCA9514A Hot swappable I2C-bus and SMBus bus buffer