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. Slave devices which employ clock stretching are therefore not supported.

FEATUREs and benefits
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
Very low supply current
Uncomplicated characteristics suitable for quick implementation in most common 2-wire bus applications

APPLICATIONs
Electronic signs and displays
Game consoles/boxes
Gaming machine networks
TV/projector/monitor interconnection (DDC)
Power management systems
Desktop and portable computers
Security systems