DESCRIPTION
The LTC®4306 is a 4-channel, 2-wire bus multiplexer with bus buffers to provide capacitive isolation between the upstream bus and downstream buses. Through software control, the LTC4306 connects the upstream 2-wire bus to any desired combination of downstream buses. Each channel can be pulled up to a supply voltage ranging from 2.2V to 5.5V, independent of the LTC4306 supply voltage. The downstream channels are also provided with ALERT1-ALERT4 inputs for fault reporting.

FEATURES
■ 1:4 2-Wire Multiplexer/Switch
■ Connect SDA and SCL Lines with 2-Wire Bus Commands
■ Supply Independent Bidirectional Buffer for SDA and SCL Lines Increases Fan-Out
■ Programmable Disconnect from Stuck Bus
■ Compatible with I2C and SMBus Standards
■ Rise Time Accelerator Circuitry
■ SMBus Compatible ALERT Response Protocol
■ Two General Purpose Inputs-Outputs
■ Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
■ ±10kV Human Body Model ESD Ruggedness
■ 24-Lead QFN (4mm × 5mm) and SSOP Packages

APPLICATIONS
■ Nested Addressing
■ 5V/3.3V Level Translator
■ Capacitance Buffer/Bus Extender