LTC4308IMS8#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4308IMS8#PBF is a hot swappable, bidirectional 2-wire bus buffer designed for I2C and SMBus applications. It isolates input and output capacitances to prevent data corruption during live board insertion. The device supports voltage level shifting between 0.9V and 5.5V with specific offset voltages: -200mV (output to input) and +300mV (input to output). It features automatic stuck bus recovery that generates up to 16 clock pulses if SDAOUT or SCLOUT remains low for 30ms. Operating parameters include a supply voltage range of 2.3V to 5.5V, a maximum operating frequency of 600kHz, and an idle time of 95µs. The IMS8 package operates from -40°C to +85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering with automatic stuck bus recovery generating clock pulses
• Level shifting capability down to 0.9V with negative offset voltages
• Precharges output lines to 1V to minimize disturbance during live insertion
• Open-drain READY status output indicating connection state

Signal Buffers, Repeaters, Splitters Applications

• Live board insertion into backplanes
• Servers and RAID systems
• ATCA architectures
• Capacitance buffering and bus extending

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the suffix #PBF indicates lead-free finish and tube packaging. Confirm the IMS8 designation corresponds to the 8-lead MSOP package. Ensure the temperature grade matches the 'I' suffix for industrial range operation. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and current availability status.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when isolation between card and backplane capacitance is required. Use it for systems needing level translation below standard 1.8V thresholds. Consider its automatic recovery feature for environments prone to bus lockups. Verify pull-up resistor values meet rise time accelerator activation requirements.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the Analog Devices LTC4300 family of hot swappable bus buffers. It shares functional similarities with the LTC4301L but adds automatic stuck bus recovery and rise time accelerators. The IMS8 variant specifically utilizes the plastic MSOP package format suitable for surface mount assembly in compact designs.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4301LIMS8#PBF is a related device. Replacing it requires inverting the CS/ENABLE signal logic due to active-low versus active-high differences. The LTC4308 offers lower minimum supply voltage and automatic bus recovery not present in the LTC4301L.