LTC4303IMS8#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The Analog Devices LTC4303IMS8#TRPBF is a hot swappable 2-wire bus buffer designed for I2C and SMBus applications. It operates with a supply voltage (VCC) ranging from 2.7V to 5.5V and supports maximum operating frequencies up to 600kHz. The device features automatic disconnect when the SDA or SCL lines remain low for 30ms or more, followed by automatic clocking to recover stuck buses. It includes rise-time accelerators that provide a transient boost current of up to 5.5mA to maintain signal integrity. The component is housed in an 8-lead MSOP package and is rated for an industrial temperature range of -40°C to +85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering while isolating backplane and card capacitances during live insertion
• Automatically recovers stuck buses by generating clock pulses when data or clock lines are held low
• Includes precharge circuitry to minimize bus disturbances during connection
• Features rise-time accelerator circuits to support larger pull-up resistors

Signal Buffers, Repeaters, Splitters Applications

• Hot board insertion into live backplanes
• Capacitance buffering and bus extension
• RAID systems requiring safe I/O card replacement

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging. Confirm the IMS8 designation corresponds to the MSOP-8 package variant. Ensure the temperature grade matches the required operational environment specifications before finalizing procurement orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for designs requiring isolation between backplane and card-side I2C or SMBus lines. It is suitable for applications needing protection against stuck bus conditions without external microcontroller intervention. Verify that the system voltage falls within the 2.7V to 5.5V operating range.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4303 family of hot swappable bus buffers. It is pin-compatible with the LTC4300A-1. The device serves as a bridge for serial communication lines, ensuring data integrity during physical connection events in server and storage architectures.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers include LTC4300A-1 and LTC4304. Verify functional compatibility regarding bus recovery mechanisms and voltage levels before substitution.

Signal Buffers, Repeaters, Splitters FAQ

How does the LTC4303 handle a stuck bus condition?

If SDAOUT or SCLOUT remains low for 30ms or more, the device automatically breaks the connection and generates up to 16 clock pulses on SCLOUT to attempt to free the bus.

What is the purpose of the ENABLE pin?

Driving ENABLE low isolates the input from the output and disables automatic clocking. Driving it high allows the device to connect once the bus is idle.

Does the device support level shifting?

No, the standard LTC4303 does not provide level shifting functions; it maintains the same voltage logic levels on both sides of the buffer.