LTC4305 Datasheet | Linear Technology

.. 2-Channel, 2-Wire Bus Multiplexer with Capacitance Buffering Features - - DESCRIPTIO - - - - - - - - 1:2 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 Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane ±10k V Human Body Model ESD Ruggedness 16-Lead (4mm × 5mm) DFN and SSOP Packages The LTC®4305 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, the LTC4305 connects the upstream 2-wire bus to any desired bination of downstream channels. Each channel can be pulled up to a supply voltage ranging from 2.2V to 5.5V, independent of the LTC4305 supply voltage. The downstream channels are also provided with an 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. The LTC4305 is available in 16-lead (4mm × 5mm) DFN 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 0.01µF 10k 10k 10k VCC SCLIN MICROCONTROLLER SDAIN ALERT SCL1 SDA1 ALERT1 5V LTC4305 ADR2 ADR1 ADR0 GND SCL2 SDA2 ALERT2 4305 TA01 VCC = 3.3V 10k 10k 10k SCLIN...