LTC4311CDC#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4311CDC#TRPBF 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. The component is housed in a 6-lead 2mm × 2mm DFN package with an exposed pad.

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 bus 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 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 TRPBF corresponds to the Tape and Reel packaging format as defined in the manufacturer's order information table. Confirm the CDC suffix indicates the commercial temperature range of 0°C to 70°C. Ensure the lead-free finish designation matches the required environmental compliance standards for the target assembly process.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when the I2C or SMBus line capacitance exceeds the 400pF specification limit, causing slow rise times with passive resistors. It is suitable for systems requiring operation across a wide supply voltage range from 1.6V to 5.5V. Consider the 2mm × 2mm DFN package for space-constrained designs where thermal dissipation via the exposed pad can be managed effectively.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4311 family of low voltage I2C/SMBus accelerators manufactured by Analog Devices Inc. The family includes variants with different temperature grades (CDC for commercial, IDC for industrial) and package options (DFN and SC70). These devices address the limitations of traditional resistive pull-ups in high-capacitance environments by actively driving the bus lines during transitions.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC1694 is a functionally similar SMBus accelerator but operates at higher voltages (2.7V–6V) and has lower performance metrics regarding frequency and current. When replacing LTC1694 with LTC4311, account for the lower operating voltage range and the presence of the ENABLE pin on the LTC4311.