LTC4301LCDD#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The Analog Devices LTC4301LCDD#TRPBF is a hot swappable, supply-independent 2-wire bus buffer designed for I2C and SMBus applications. It operates with a VCC range of 2.7V to 5.5V and supports frequencies up to 600kHz. The device translates low voltage signals (down to 1V) to standard logic rails while isolating input and output capacitances. It features 10kV HBM ESD protection and includes precharge circuitry to prevent bus corruption during live insertion. The component is housed in an 8-lead DFN package measuring 3mm x 3mm.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering that isolates backplane and card capacitances to maintain signal integrity.
• Prevents data and clock bus corruption during live board insertion and removal from backplanes.
• Supports level translation allowing pull-up voltages as low as 1V on the input side.

Signal Buffers, Repeaters, Splitters Applications

• Hot swap I/O card insertion into live backplanes
• Capacitance buffering and bus extension
• Servers and desktop computer systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the LC designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure compatibility with the required 8-lead DFN footprint during procurement planning.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this part when supply independence is required to bridge different voltage domains on SDA and SCL lines. It is suitable for systems needing high ESD protection and capacitance isolation. Verify that the operating environment remains within the specified commercial temperature limits for the LC variant.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4301L family of hot swappable bus buffers. It shares functional similarities with the LTC4300A but offers supply-independent operation. The DFN package provides a compact solution for space-constrained designs requiring robust bus protection.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate the LTC4300A or LTC4302 series only if their specific addressable or non-supply-independent features align with system requirements.

Signal Buffers, Repeaters, Splitters FAQ

How does the LTC4301L handle live insertion?

It uses precharge circuitry to force 1V onto output pins and waits for a stop bit or bus idle before connecting the input and output sides, preventing bus corruption.

What is the function of the CS pin?

Driving CS above 1.4V disconnects the input from the output and pulls READY low. Driving it low allows connection after a transaction completes.

Does the device support clock stretching?

Yes, the bidirectional buffering ensures that clock stretching, arbitration, and synchronization protocols function correctly across the buffer.