TCA4311DGKR

Product Folder Sample & Buy Support & Community Tools & Software Technical Documents TCA4311 SCPS173A – DECEMBER 2008 – REVISED JUNE 2014 TCA4311 Hot Swappable 2-Wire Bus Buffers Not Recommended for New Designs 1 Features 2 Description • The TCA4311 is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip. 1 • • • • • • • • • • • • • Operating Power-Supply Voltage Range of 2.7-V to 5.5-V Supports Bidirectional Data Transfer of I2C Bus Signals SDA and SCL Lines Are Buffered Which Increases Fanout 1-V Precharge on All SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane SDA and SCL Input Lines Are Isolated From Outputs Accommodates Standard Mode and Fast Mode I2C Devices Applications Include Hot Board Insertion and Bus Extension Low ICC Chip Disable of