LTC4313IMS8-1#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4313IMS8-1#PBF 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 maximum clock frequency of 400kHz. The device features bidirectional buffering with a high noise margin (VIL = 0.3•VCC) and level translation between 3.3V and 5V busses. Key electrical parameters include an input capacitance of 10pF, propagation delay of 130ns, and operating current of 8.1mA. It provides rise time acceleration via slew-limited switches and includes stuck bus disconnect/recovery logic.

Signal Buffers, Repeaters, Splitters Feature Summary

• Hot swappable design with precharge circuitry to minimize bus disturbances during live board insertion
• High noise margin compatible with non-compliant I2C devices driving high VOL levels
• Automatic stuck bus disconnect and recovery using up to sixteen generated clock pulses
• Rise time accelerators configured as slew limited switches to meet specifications in heavily loaded systems

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffering to increase fanout on 2-wire buses
• Live board insertion and removal from backplanes in telecommunications systems
• Level translation between 3.3V and 5V busses
• Capacitance buffering for I2C signals in ATCA systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix IMS8-1#PBF against official Analog Devices documentation to confirm the industrial temperature grade (-40°C to +85°C) and MSOP-8 package configuration. Ensure compatibility with system requirements for 2-wire bus buffering and hot swap functionality before procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this part for applications requiring robust isolation between backplane and card capacitances. The -1 variant specifically supports level translation between 3.3V and 5V busses. Consider the strong rise time accelerator capability if designing for heavily loaded buses exceeding standard I2C capacitance limits.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4313 family of 2-wire bus buffers. The IMS8-1#PBF designation indicates the industrial temperature range version packaged in an 8-lead MSOP. It differs from the CMS8-1#PBF by its extended temperature rating and from the -2/-3 variants by its specific rise time accelerator configuration and supported voltage levels.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC4313CMS8-1#PBF offers identical electrical performance but is rated for commercial temperature range (0°C to 70°C). Verify that the application environment remains within this narrower thermal window before substituting.