LTC4312IDE#PBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4312IDE#PBF is a hot-swappable, pin-selectable 2-channel 2-wire bus multiplexer with bidirectional buffering. It supports level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V busses. The input supply range (VCC) is 2.9V to 5.5V, while the output side accelerator supply (VCC2) ranges from 2.25V to 5.5V. Input supply current is typically 7.3mA when enabled and 2.2mA when disabled at 5.5V. The device operates within an ambient temperature range of -40°C to +85°C and is housed in a 14-lead 4mm × 3mm DFN package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Hot-swappable design prevents SDA and SCL corruption during live board insertion and removal from backplanes.
• Bidirectional buffering isolates upstream bus capacitance from downstream bus capacitances on both data and clock lines.
• Integrated stuck bus disconnect and recovery mechanism generates up to sixteen clocks to free stuck busses.
• Selectable rise time accelerator current and activation voltage via the ACC pin for optimized performance.

Signal Buffers, Repeaters, Splitters Applications

• Telecommunications systems including ATCA
• I2C address expansion
• Level translation between different bus voltages
• Capacitance buffering and bus extension
• Live board insertion applications

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm that the IDE designation corresponds to the industrial temperature grade (-40°C to +85°C) and the 14-lead DFN package. Ensure compatibility with system voltage requirements before procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for applications requiring hot-swap capability and isolation of bus capacitance. Consider the VCC and VCC2 supply constraints when designing level translation circuits. Evaluate the need for the stuck bus recovery feature based on system reliability requirements.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4312 family of 2-wire bus multiplexers. It shares functional similarities with other Analog Devices interface ICs designed for I2C and SMBus systems, offering robust protection and signal integrity features for complex bus topologies.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices marketing for alternative parts with wider operating temperature ranges or different package options.