LTC4302-1

FEATURES Bidirectional Buffer for SDA and SCL Lines Increases Fanout s Connect SDA and SCL Lines with 2-Wire Bus Commands s Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane www.DataSheet4U.com s Compatible with I2CTM Standard Mode, I2C Fast Mode and SMBus Standards s Rise Time Accelerators on SDA, SCL Lines s 1V Precharge on SDA and SCL Lines s 32 Unique Addresses from a Single ADDRESS Pin s Two General Purpose Inputs-Outputs (LTC4302-1) s Translates Between 5V and 3.3V Systems (LTC4302-2) s Small 10-Pin MSOP Package s LTC4302-1/LTC4302-2 Addressable 2-Wire Bus Buffers DESCRIPTIO The LTC®4302-1/LTC4302-2 addressable I2C bus and SMBus compatible bus buffers allow a peripheral board to be inserted and removed from a live backplane without corruption of the bus. The LTC4302-1/LTC4302-2 maintain electrical isolation between the backplane and peripheral board until their VCC supply is valid and a master device on the backplane side addresses the LTC4302-1/ LTC4302-2 and commands them to connect. The LTC4302-1/LTC4302-2’s ADDRESS pin provides 32 possible addresses set by an external resistive divider between VCC and GND. The LTC4302-1/LTC4302-2 work with supply voltages ranging from 2.7V to 5.5V. The SDA and SCL inputs and outputs do not load the bus lines when VCC is low. Rise time accelerator circuitry* allows for heavier capacitive bus loading while still meeting system timing requirements. During insertion, the SDA and SCL lines are precha...