PCA9521 Overview
The PCA9521 is a monolithic bipolar integrated circuit for bus buffering in applications including I2C-bus, SMBus, PMBus, and other systems based on similar principles. The buffer extends the bus load limit by buffering both the SCL and SDA lines. It supports up to 400 pF loads on each side of the buffer at 400 kHz.
PCA9521 Key Features
- Dual, bidirectional unity gain buffer
- Fast switching times allow operation in excess of 1 MHz
- Supports I2C-bus (Standard-mode and Fast-mode), SMBus (standard and high power
- Enable allows bus segments to be disconnected
- Low standby current when not enabled
- Application/removal of power to IC will not interfere with other bus activity
- 6 mA (static) pull-down capability supports a wide range of bus standards
- Low noise susceptibility
- Low input-output offset voltage
- Threshold and offset parameters allow the connection of several devices in series