LTC4313IMS8-3#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4313IMS8-3#TRPBF is a hot swappable 2-wire bus buffer in an 8-lead MSOP package. It supports I2C, SMBus, and PMBus protocols with a maximum clock frequency of 400 kHz. The device operates with a supply voltage range of 2.9 V to 5.5 V for the IC core, while supporting level translation for bus voltages down to 1.4 V. It features a high noise margin with VIL = 0.3 • VCC and includes stuck bus disconnect and recovery logic. The input capacitance is 10 pF, and the typical propagation delay is 130 ns. Operating temperature range is -40°C to +85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for 2-wire buses with high noise margin up to 0.3 • VCC
• Supports level translation between 3.3V, 5V, 1.5V, 1.8V, and 2.5V busses
• Prevents SDA and SCL corruption during live board insertion via precharge circuitry
• Includes automatic stuck bus disconnect and recovery functionality

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffering to increase fanout on I2C/SMBus networks
• Live board insertion and removal from backplanes in telecommunications systems
• Level translation between different voltage domains (e.g., 3.3V to 1.8V)
• Capacitance buffering for bus extenders and servers

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the IMS8-3 designation matches the required industrial temperature grade (-40°C to +85°C) and the -3 variant's capability for lower voltage bus translation. Ensure the ordering information aligns with the manufacturer's current lead-free finish specifications.

Signal Buffers, Repeaters, Splitters Selection Notes

Select the LTC4313IMS8-3#TRPBF when level translation to voltages below 2.9V is required, as other variants in the family lack this feature. This model is suitable for applications requiring robust protection against non-compliant I2C devices driving high VOL levels. Consider the 8-lead MSOP package constraints and the absence of Rise Time Accelerators (RTAs) compared to the -1 and -2 variants.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4313 family of 2-wire bus buffers manufactured by Analog Devices. It shares the core hot swap and high noise margin architecture with the LTC4313-1 and LTC4313-2 models. The primary distinction lies in its support for lower voltage bus translation and the omission of internal rise time accelerators found in the other series members.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4313IMS8-3#PBF