PCA9512A; PCA9512B
Level shifting hot swappable I2C-bus and SMBus bus buffer
Rev.
6 — 1 March 2013
Product data sheet
1.
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 i...