LTC4300A-1IMS8#TRPBF

Overview

The LTC4300A-1IMS8#TRPBF is a hot swappable 2-wire bus buffer manufactured by Analog Devices Inc. It supports I2C, I2C Fast Mode, and SMBus standards with operation up to 400 kHz. The device operates on a supply voltage ranging from 2.7 V to 5.5 V and features bidirectional buffering for SDA and SCL lines. Key electrical parameters include a typical supply current of 5.1 mA, an input capacitance of 10 pF, and a propagation delay skew of ±75 ns. It incorporates rise-time accelerator circuitry and a 1V precharge function to minimize bus disturbances during live insertion.

Feature Summary

• Provides bidirectional buffering while isolating backplane and card capacitances
• Includes rise-time accelerator circuitry to support weaker DC pull-up currents
• Features 1V precharge on all SDA and SCL lines to minimize bus disturbances
• Supports clock stretching, arbitration, and synchronization protocols

Applications

• Bidirectional buffer for SDA and SCL lines to increase fanout
• Prevents data corruption during live board insertion and removal from backplanes
• Hot board insertion in servers and desktop computers
• Capacitance buffering and bus extending applications

Procurement Notes

Verify the IMS8 suffix indicates the industrial temperature range of -40°C to +85°C. Confirm the #TRPBF designation specifies tape and reel packaging. Ensure the component matches the specific Analog Devices part number for your design requirements.

Selection Notes

Select this model when hot swap protection and capacitance isolation are required for 2-wire buses. The LTC4300A-1 variant includes an ENABLE pin for low current shutdown and a READY output flag. Verify that the system voltage remains within the 2.7 V to 5.5 V operating range.

Part Context

This component belongs to the LTC4300A series of hot swappable 2-wire bus buffers. It is designed to allow I/O cards to be inserted into live backplanes without corrupting data or clock buses. The series provides isolation between backplane and card sides while maintaining signal integrity.

Replacement Considerations

LTC4300A-1IMS8#PBF is the tube package equivalent. LTC4300A-2IMS8#TRPBF offers level shifting capabilities instead of the ENABLE pin.