LTC4311IDC#TRMPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4311IDC#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 specification limit. It operates at supply voltages from 1.6V to 5.5V and is compatible with SMBus. The device provides slew-limited pull-up currents during positive transitions to quickly slew lines, while disabling currents during negative transitions to improve noise margins. It features an auto-detect standby mode reducing current when both SCL and SDA are high, and a low (<5μA) shutdown mode when disabled. Operating temperature range is -40°C to 85°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Improves I2C bus rise time transition
• Ensures data integrity with multiple devices on the I2C bus
• Wide supply voltage range: 1.6V to 5.5V
• Improves low state noise margin
• Up to 400kHz operation
• Auto detect low power standby mode
• Low (<5μA) supply current shutdown
• Does not load bus when disabled or powered down
• Strong slew limited pull-up current
• ±8kV human body model ESD ruggedness
• 2mm × 2mm DFN package

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 part number suffix #TRMPBF indicates tape and reel packaging with 500 pieces per reel. Confirm the 'I' grade designation corresponds to the industrial temperature range of -40°C to 85°C. Ensure the DC package type matches the required 6-lead plastic DFN footprint. Check RoHS compliance status as specified in the ordering information section of the datasheet.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when bus capacitance exceeds 400pF or when multiple devices require signal acceleration without compromising noise margins. The wide supply voltage range supports systems operating between 1.6V and 5.5V. Consider the 2mm x 2mm DFN package for space-constrained designs requiring improved rise times over standard resistive pull-ups.

Signal Buffers, Repeaters, Splitters Part Context

The LTC4311 belongs to Analog Devices' family of I2C and SMBus interface accelerators. It addresses limitations of passive pull-ups by providing active, slew-limited current only during positive transitions. This approach maintains low state noise margins while significantly improving rise times under heavy capacitive loads, distinguishing it from simple buffer solutions.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC1694 offers similar functionality but operates at higher voltages (2.7V–6V) and consumes more standby current. When replacing, account for differences in enable pin threshold, supply voltage range, and package dimensions. Verify that the target system's bus capacitance and timing requirements align with the LTC4311's performance specifications.