LTC4315IDE#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4315IDE#PBF is a hot-swappable 2-wire bus buffer with high noise margin, designed for I²C and SMBus applications. It supports bidirectional buffering between input and output busses while maintaining low offset voltage. The device operates with supply voltages VCC from 2.9V to 5.5V and VCC2 from 2.25V to 5.5V. Input supply current is typically 8.1mA when enabled. It features level translation capabilities for 1.5V, 1.8V, 2.5V, 3.3V, and 5V busses. The component is housed in a 12-lead (4mm × 3mm) DFN package and operates within an ambient temperature range of –40°C to +85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides capacitance buffering by isolating input and output bus capacitances via back-to-back buffers on clock and data channels.
• Features a high noise margin allowing interoperability with non-compliant I²C devices that drive a high VOL.
• Includes precharge circuitry to minimize bus disturbances during live board insertion and removal.
• Supports automatic stuck bus disconnect and recovery by generating up to sixteen clock pulses.

Signal Buffers, Repeaters, Splitters Applications

• Bidirectional buffering to increase fanout in I²C systems
• Live board insertion and removal protection in telecommunications systems including ATCA
• Level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V busses

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF indicates tube packaging when sourcing this component. Confirm the IDE suffix corresponds to the industrial temperature grade of –40°C to +85°C. Ensure compatibility with the required 12-lead DFN footprint during procurement planning.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this part for applications requiring robust hot-swap capabilities and high noise immunity on 2-wire buses. Consider the separate VCC2 supply for independent control of output-side rise time accelerators. Evaluate the need for the DISCEN pin functionality if stuck bus recovery is required in the design.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the LTC4315 family of 2-wire bus buffers. The IDE variant specifically denotes the industrial temperature range and the DFN package style. It serves as a solution for extending I²C bus capacitance and protecting downstream devices during system power-up or card insertion events.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Consult manufacturer documentation for direct replacements. Similar functional alternatives include the LTC4313 series for multi-channel buffering requirements.