LTC4308CMS8#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4308CMS8#PBF is a low voltage, level shifting hot swappable 2-wire bus buffer with stuck bus recovery. It supports I2C and SMBus protocols with a maximum operating frequency of 600 kHz. The supply voltage range is 2.3 V to 5.5 V, with a typical supply current of 7 mA. Propagation delay is 70 ns for high-to-low transitions. The device 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

• Bidirectional buffering isolates input and output bus capacitances during live board insertion.
• Automatic stuck bus recovery generates clock pulses to release locked buses.
• Output precharge minimizes disturbances when connecting to active backplanes.
• Level shifting capability accommodates systems with varying voltage levels.

Signal Buffers, Repeaters, Splitters Applications

• Live board insertion into servers
• RAID systems
• ATCA architectures

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix CMS8 corresponds to the MSOP package and C grade temperature range. Confirm RoHS compliance status through official documentation before procurement. Ensure the component matches the required pin configuration and thermal characteristics for the target application.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for applications requiring isolation between card and backplane capacitance. It is suitable for mixed voltage environments where level shifting is necessary. Consider the 30ms timeout feature if bus stuck low recovery is required without external intervention.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4308 family of hot swappable bus buffers. It shares functional similarities with the LTC4301L but includes additional features like automatic stuck bus recovery and rise time accelerators. The MSOP package provides a compact solution for space-constrained designs.

Signal Buffers, Repeaters, Splitters Replacement Considerations

When replacing the LTC4301L, account for differences in minimum supply voltage and offset voltages. The ENABLE pin logic differs from the CS pin of the LTC4301L; invert control signals accordingly. Verify that the system can tolerate the negative output-to-input offset voltage.