LTC4311CDC#TRMPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4311CDC#TRMPBF is a dual I2C active pull-up accelerator designed to enhance data transmission speed and reliability for bus loading conditions exceeding the standard 400pF limit. It operates at supply voltages from 1.6V to 5.5V and supports SMBus protocols. The device provides slew-limited pull-up currents during positive transitions to quickly charge capacitive loads, while disabling currents during negative transitions to improve noise margins. It features an auto-detect standby mode reducing current when both lines are high, and a low shutdown mode consuming less than 5μA when disabled. The component is housed in a 6-lead 2mm × 2mm DFN package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides boosted pull-up current only during positive bus transitions to accelerate rise times on highly capacitive buses
• Features an auto-detect standby mode that reduces supply current when both SCL and SDA lines are high
• Includes a low current shutdown mode activated by grounding the ENABLE pin, placing bus pins in a high impedance state
• Offers strong slew-limited pull-up current capability to handle large bus capacitances without compromising signal integrity

Signal Buffers, Repeaters, Splitters Applications

• Notebook and Palmtop Computers
• Portable Instruments
• Battery Chargers
• Industrial Controls
• TV/Video Products
• ACPI SMBus Interface

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates tape and reel packaging with a quantity of 500 pieces. Confirm the CDC suffix corresponds to the commercial temperature range of 0°C to 70°C. Ensure the lead-free finish matches project requirements. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity before procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when I2C or SMBus bus capacitance exceeds 400pF, causing slow rise times and potential data errors. It is suitable for systems requiring operation between 1.6V and 5.5V. Choose the CDC variant for commercial temperature applications. Consider parallel connection of multiple units if significantly higher pull-up current is needed for extremely heavy loading conditions.

Signal Buffers, Repeaters, Splitters Part Context

This device belongs to the LTC4311 family of low voltage I2C/SMBus accelerators. It serves as a performance upgrade over standard resistive pull-ups, particularly in multi-device configurations or long interconnects. It differs from similar parts like the LTC1694 by offering lower power consumption, a wider supply voltage range, and a smaller package footprint while maintaining compatibility with standard I2C and SMBus timing specifications.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC4311IDC#TRMPBF is a direct functional replacement with an extended industrial temperature range (-40°C to 85°C). The LTC4311CSC6#TRMPBF offers identical electrical performance but utilizes a 6-lead SC70 package instead of the DFN form factor. Verify thermal management and board space constraints when substituting package types.