LTC4306 Datasheet | Linear Technology

LTC4306 4-Channel, 2-Wire Bus Multiplexer with Capacitance Buffering Features 1:4 2-Wire Multiplexer/Switch - Connect SDA and SCL Lines with 2-Wire Bus mands - Supply Independent Bidirectional Buffer for SDA .. and SCL Lines Increases Fan-Out - Programmable Disconnect from Stuck Bus - patible with I2C and SMBus Standards - Rise Time Accelerator Circuitry - SMBus patible ALERT Response Protocol - Two General Purpose Inputs-Outputs - Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane - ±10k V Human Body Model ESD Ruggedness - 24-Lead QFN (4mm × 5mm) and SSOP Packages - DESCRIPTIO 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 bination 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. 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. The LTC4306 is available in 24-lead QFN (4mm × 5mm) and SSOP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patent pending. U APPLICATIO S - - - Nested Addressing 5V/3.3V Level Translator Capacitance Buffer/Bus Extender TYPICAL APPLICATIO 2.5V 3.3V A Level Shifting and Nested Addressing Application I2C Bus Waveforms VCC = 3.3V 0.01µF 10k 10k 10k VCC MICROCONTROLLER SCLIN SDAIN ALERT SCL1 SDA1 ALERT1 5V SFP MODULE 1 ADDRESS = 1111 000 LTC4306 10k 10k...