LTC4313IMS8-1#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4313IMS8-1#TRPBF is a hot swappable 2-wire bus buffer supporting I2C, SMBus, and PMBus protocols. It operates within a supply voltage range of 2.9V to 5.5V with a typical quiescent current of 8.1mA. The device provides bidirectional buffering for SDA and SCL lines, featuring a high noise margin defined by VIL = 0.3•VCC. It includes rise time accelerators (RTAs) configured as slew-limited switches to handle heavily loaded buses. The component supports level translation between 3.3V and 5V busses and offers stuck bus disconnect and recovery functionality. It is housed in an 8-lead MSOP package and rated for industrial temperatures from -40°C to +85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides capacitance buffering to isolate backplane and card capacitances during live board insertion.
• Features strong rise time accelerators configured as slew-limited switches to reduce bus rise times.
• Includes automatic stuck bus disconnect and recovery logic generating clock pulses to free stuck conditions.
• Supports level translation between 3.3V and 5V busses while maintaining high noise margins.

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffering to increase fanout on I2C and SMBus networks.
• Live board insertion and removal protection in telecommunications systems such as ATCA.
• Level translation between 3.3V and 5V bus segments.
• Capacitance buffering for bus extenders and signal repeaters.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing this part. Confirm the IMS8 designation corresponds to the industrial temperature grade (-40°C to +85°C) and MSOP package. Ensure compatibility with the required bus voltage levels and check for any recent product change notifications that might affect pinout or electrical characteristics before finalizing procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select the LTC4313-1 variant specifically for applications requiring strong rise time acceleration via slew-limited switch mode RTAs. This model is suitable for translating between 3.3V and 5V busses. Consider the MSOP package size if space constraints exist. Verify that the bus capacitance and pull-up resistor values align with the RTA activation requirements to ensure proper signal integrity.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4313 family of 2-wire bus buffers manufactured by Analog Devices Inc. The family includes variants differentiated by temperature grade (C for commercial, I for industrial), package type (DD8 DFN or MS8 MSOP), and RTA configuration (LTC4313-1, -2, or -3). The IMS8-1 designation identifies the industrial grade, MSOP package, and -1 RTA configuration.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Direct substitutes include other parts within the LTC4313 family such as the LTC4313CMS8-1#TRPBF for commercial temperature ranges or the LTC4313IDD-1#TRPBF for DFN packages. Cross-family replacements require verification of RTA strength and voltage level translation capabilities.