LTC4312CMS#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4312CMS#PBF is a pin-selectable, 2-channel, 2-wire bus multiplexer with bidirectional buffers. It supports I²C, Fast Mode, and SMBus protocols across supply voltages of 2.9V to 5.5V for VCC and 2.25V to 5.5V for VCC2. The device features selectable rise time accelerators controlled by the ACC pin, level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V busses, and hot-swappable operation. It includes stuck bus disconnect and recovery logic, generating up to 16 clocks upon fault detection. Operating temperature range is 0°C to +70°C in a 16-lead MSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering isolates upstream bus capacitance from downstream loads while supporting multiple voltage levels.
• Pin-selectable 1:2 multiplexing allows independent connection control via ENABLE pins for live board insertion.
• Configurable rise time accelerators reduce system rise times and enable operation with heavy capacitive loads.

Signal Buffers, Repeaters, Splitters Applications

• Telecommunications systems including ATCA
• I²C address expansion
• Level translation between different bus voltage domains
• Capacitance buffering and bus extension
• Live board insertion into backplanes

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix CMS indicates the commercial temperature grade (0°C to +70°C) and MSOP package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before finalizing procurement specifications.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring hot-swappable I²C multiplexing with high noise margins. Ensure VCC2 is configured correctly for level translation requirements. Verify that the total bus current does not exceed the 4mA sink capability when multiple channels are active simultaneously.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4312 family of 2-wire bus multiplexers. It shares functional similarities with the LTC4311 and LTC4313 but offers distinct pin configurations and channel counts. The 'C' designation specifically denotes the commercial operating temperature range compared to industrial variants.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4312IMS#PBF serves as an industrial temperature grade replacement (-40°C to +85°C). Other Analog Devices bus buffers like the LTC4301 or LTC4313 may be considered if multiplexing functionality is not required.