LTC4307CMS8#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4307CMS8#PBF is a bidirectional hot swappable 2-wire bus buffer designed for I/O card insertion into live backplanes. It isolates backplane and card capacitances while providing low offset buffering compatible with I²C, I²C Fast Mode, and SMBus protocols. The device features a 60mV input-output offset voltage independent of load, ensuring compatibility with non-compliant devices. It includes automatic stuck bus recovery that generates clock pulses if SDAOUT or SCLOUT remains low for 30ms. Electrical specifications include a supply voltage range of 2.3V to 5.5V, a maximum operating frequency of 600kHz, and a typical propagation delay of 70ns. The component operates within a temperature range of 0°C to 70°C and is housed in an 8-lead MSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Prevents data and clock bus corruption during live board insertion and removal by isolating input and output lines.
• Automatically recovers from stuck bus conditions by generating up to 16 clock pulses after a 30ms timeout.
• Provides bidirectional buffering with a low 60mV offset voltage that remains stable regardless of load conditions.
• Features 1V precharge on SDA and SCL lines to minimize disturbances when connecting to active busses.

Signal Buffers, Repeaters, Splitters Applications

• Servers
• RAID Systems
• ATCA (Advanced Telecommunications Computing Architecture)
• Capacitance Buffering and Bus Extension

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix CMS8 corresponds to the MSOP-8 package and commercial temperature grade (0°C to 70°C). Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the exact pinout and marking requirements for your PCB layout.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when hot swapping capabilities are required for I²C or SMBus interfaces. It is suitable for applications needing isolation between backplane and card capacitances. Consider the 60mV offset for cascading multiple buffers. Verify that the 2.3V to 5.5V supply range aligns with system power rails.

Signal Buffers, Repeaters, Splitters Part Context

This device belongs to the LTC4307 family of hot swappable bus buffers. It shares functional similarities with other members like the LTC4307IMS8 but differs in package type and operating temperature range. The CMS8 designation specifically indicates the plastic MSOP package variant intended for commercial temperature applications.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices for alternative components within the same product family or similar interface buffer solutions.