LTC4305IGN#PBF

LTC4305 is a 2-channel, 2-wire bus multiplexer with bus buffers to provide capacitive isolation between the upstream bus and downstream buses. Through software control, this device connects the upstream 2-wire bus to any desired combination of downstream channels. The downstream channels are also provided with an active-low ALERT1–ALERT2 inputs for fault reporting. Programmable timeout circuitry disconnects the downstream buses if the bus is stuck low. When activated, rise time accelerators source currents into the 2-wire bus pins to reduce rise time. Driving the ENABLE pin low restores all features to their default states. Three address pins provide 27 distinct addresses. It is widely used in application such as nested addressing, 5V/3.3V level translator, capacitance buffer/bus extender etc.

• 1:2 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, input supply current is 5.2mA typ at TA = 25°C, VCC = 3.3V)
• Compatible with I²C and SMBus standards
• Rise time accelerator circuitry, SMBus compatible ALERT response protocol
• Prevents SDA and SCL corruption during live board insertion and removal from backplane
• ±10KV human body model ESD ruggedness
• Input supply voltage range is 2.7V to 5.5V
• Operating temperature is 0°C to 70°C, package style is 16-laed narrow plastic SSOP

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