LTC4314IGN#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4314IGN#TRPBF is a hot-swappable, pin-selectable 4-channel 2-wire bus multiplexer with bidirectional buffering. It supports I2C and SMBus protocols across multiple voltage domains including 1.5V, 1.8V, 2.5V, 3.3V, and 5V. The device operates from a VCC supply of 2.9V to 5.5V and an output-side accelerator supply (VCC2) of 2.25V to 5.5V. Input supply current ranges from 1.6mA to 3.5mA when disabled, and up to 7.3mA typical when enabled. It features selectable rise time accelerators controlled by the ACC pin, stuck bus disconnect and recovery logic with a 45ms timeout, and ±4kV HBM ESD protection. The component is housed in a 20-lead plastic SSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for SDA and SCL lines while isolating upstream capacitance from downstream loads.
• Supports level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V bus voltages.
• Includes configurable rise time accelerators to reduce system rise times under heavy capacitive loads.
• Features automatic stuck bus detection and recovery mechanisms that generate clock pulses to release locked buses.

Signal Buffers, Repeaters, Splitters Applications

• Telecommunications systems including Advanced Telecommunications Computing Architecture (ATCA)
• Address expansion for I2C and SMBus networks
• Level translation between different voltage domains
• Capacitance buffering and bus extension
• Live board insertion into active backplanes

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix IGN#TRPBF confirms the 20-lead SSOP package and tape-and-reel shipping format. Confirm the temperature grade corresponds to the industrial range of -40°C to +85°C as indicated by the 'I' designation. Ensure the lead-free finish matches the PBF requirement. Cross-reference the manufacturer part number with official Analog Devices documentation to validate availability and revision status before finalizing orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring hot-swappable connectivity for 2-wire buses across mixed voltage levels. The choice depends on the need for independent channel enable control and the requirement to buffer high downstream capacitances without corrupting the upstream bus. Consider the ACC pin configuration requirements for rise time acceleration strength versus noise margin trade-offs based on the specific bus load characteristics.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4314 family of 2-wire bus multiplexers manufactured by Analog Devices. It shares functional similarities with other bus interface devices but is distinct in its integrated hot-swap capability and multi-voltage level shifting features. The IGN variant specifically denotes the industrial temperature grade and SSOP packaging option within the broader product line.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers include LTC4314IGN#PBF for tube packaging or LTC4314CIGN#TRPBF for commercial temperature range applications. Verify compatibility regarding operating temperature specifications and package dimensions before substitution.