LTC4300-1IMS8#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4300-1IMS8#TRPBF is a hot swappable 2-wire bus buffer designed for I2C and SMBus applications. It allows bidirectional buffering of SDA and SCL lines while isolating backplane and card capacitances during live insertion. The device operates with a supply voltage range of 2.7V to 5.5V and supports data rates up to 400kHz. Key electrical parameters include a propagation delay (tPHL) of 75ns typical, an input capacitance of 10pF, and a shutdown supply current of less than 1µA when the ENABLE pin is grounded. It features a 1V precharge circuitry to minimize bus disturbances upon connection.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for SDA and SCL lines while isolating input and output capacitances
• Incorporates rise time accelerator circuitry to maintain signal integrity with weaker pull-up currents
• Features 1V precharge on all SDA and SCL lines to minimize bus disturbances during hot swapping
• Includes an open-drain READY output pin indicating successful connection between backplane and card sides

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffer for SDA and SCL lines in I2C/SMBus systems
• Hot board insertion into live backplanes without data corruption
• Capacitance buffering and bus extension for increased fanout
• Servers and desktop computer peripheral interfaces

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the IMS8 suffix indicates the industrial temperature range (-40°C to +85°C). Confirm the #TRPBF designation ensures lead-free finish and tape and reel packaging. Cross-reference the Analog Devices part number with distributor catalogs to ensure compatibility with specific PCB footprints and soldering profiles required for MSOP-8 packages.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when hot swapping capabilities are required for 2-wire buses. The LTC4300-1 variant is suitable for systems where a digital ENABLE control pin is preferred over a dedicated secondary supply voltage. Ensure the system pull-up resistors meet the minimum slew rate requirements to activate the internal boost currents effectively.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4300 series of hot swappable bus buffers manufactured by Analog Devices. It is functionally similar to the LTC4300-2 but utilizes an ENABLE pin instead of a VCC2 supply pin for control. The IMS8 package denotes an 8-lead plastic MSOP form factor optimized for surface mount assembly in space-constrained designs.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4300-2IMS8#TRPBF serves as a functional alternative if a dedicated card-side supply voltage (VCC2) is required instead of an ENABLE pin. Other members of the LTC4300 family may offer different pin configurations or temperature ranges but require verification of electrical compatibility.