LTC4313CMS8-2#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4313CMS8-2#TRPBF is a hot-swappable 2-wire bus buffer manufactured by Analog Devices Inc. in an 8-lead MSOP package with a commercial temperature range of 0°C to 70°C. It supports bidirectional buffering for I2C and SMBus protocols up to 400kHz. The device operates on a supply voltage between 2.9V and 5.5V, drawing a typical supply current of 8.1mA. It features a high noise margin with VIL at 0.3 times VCC and includes a 2.5mA rise time accelerator current source to improve signal integrity in heavily loaded systems.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering while maintaining a low offset voltage and high noise margin up to 0.3 times VCC
• Supports level translation between 3.3V and 5V busses
• Pre-charges SDA and SCL lines to 1V during insertion to minimize bus disturbances
• Includes stuck bus disconnect and recovery logic that generates clock pulses to free stuck buses

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffer increases fanout
• Live board insertion and removal from backplane
• Telecommunications systems including ATCA
• Level translation between different voltage domains
• Capacitance buffers and bus extenders

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing components. Confirm the CMS8 variant matches the required 8-lead MSOP package and commercial temperature grade. Ensure the -2 designation aligns with the 2.5mA rise time accelerator requirement for the target application design.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this part for applications requiring robust hot-swap capabilities with moderate rise time acceleration. The -2 variant provides a fixed 2.5mA pull-up current, suitable for systems where precise current limiting is preferred over the variable slew-limited mode of the -1 variant. Verify compatibility with non-compliant I2C devices driving high VOL levels due to the high noise margin architecture.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4313 family of 2-wire bus buffers designed for I2C and SMBus interfaces. The series includes variants with different rise time accelerator strengths (-1, -2) and voltage support ranges (-1, -2, -3). The CMS8 suffix indicates the commercial temperature grade and MSOP package form factor within this product line.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4313IMS8-2#TRPBF serves as a direct replacement offering the same electrical characteristics but extended to the industrial temperature range of –40°C to 85°C.