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PCA9512A Datasheet Level shifting hot swappable I2C-bus and SMBus bus buffer

Manufacturer: NXP Semiconductors

General Description

The PCA9512A/B is a hot swappable I2C-bus and SMBus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses and includes two dedicated supply voltage pins to provide level shifting between 3.3 V and 5 V systems while maintaining the best noise margin for each voltage level.

Either pin may be powered with supply voltages ranging from 2.7 V to 5.5 V with no constraints on which supply voltage is higher.

Control circuitry prevents the backplane from being connected to the card until a stop bit or bus idle occurs on the backplane without bus contention on the card.

Overview

PCA9512A; PCA9512B Level shifting hot swappable I2C-bus and SMBus bus buffer Rev.

6 — 1 March 2013 Product data sheet 1.