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.

Features and benefits

■ Dual, bidirectional unity gain isolating buffer

■ Hot insertion logic prevents data and clock bus corruption for live backplane applications

■ Pre-charge minimizes data corruption on live insertion

■ Supports I2C-bus (Standard-mode and Fast-mode), SMBus (standard and high power modes) and PMBus

■ Open-collector ready output (RDY)

■ Fast switching times allow operation in excess of 1 MHz

■ Enable (EN) allows bus segments to be disconnected

■ Low current standby mode when not enabled

■ High-impedance ports when IC unpowered

■ 6 mA (static) pull-down capability

■ Low noise susceptibility

■ Supports the connection of several buffers in series

■ Level shift bus voltages from 1.8 V to 10 V

PCA9522DP屬于集成電路（IC） > 信號(hào)緩沖器、中繼器、分離器。恩智浦半導(dǎo)體公司制造生產(chǎn)的PCA9522DP信號(hào)緩沖器、中繼器、分離器信號(hào)緩沖器、中繼器和分離器系列中的產(chǎn)品適用于遠(yuǎn)距離電氣互連或電纜系統(tǒng)的數(shù)字信息傳輸。所有實(shí)際互連系統(tǒng)都具有非理想特性，該系列產(chǎn)品主要用于解決數(shù)字信息傳輸過(guò)程中因此造成的模擬問(wèn)題。此外，還有其他功能，例如不同物理接口樣式之間的轉(zhuǎn)換和多路復(fù)用。