LTC4311ISC6#TRPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC4311ISC6#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 specification 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 to 26μA when both lines are high, and a low shutdown current of less than 5μA. The component supports up to 400kHz operation and includes ±8kV HBM ESD protection.

Signal Buffers, Repeaters, Splitters Feature Summary

• Dual active pull-up architecture improves rise times on heavily loaded I2C or SMBus lines
• Slew-rate detector activates boosted pull-up current only during positive bus transitions
• Auto-detect standby mode reduces power consumption when bus lines remain high
• Low current shutdown mode isolates bus pins when disabled

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 that the ordering suffix #TRPBF corresponds to the Tape and Reel packaging format as specified in the manufacturer's documentation. Confirm the industrial temperature grade (I) matches the operational requirements of -40°C to +85°C. Ensure the SC-70 package type aligns with the PCB footprint design constraints before finalizing procurement orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when bus capacitance exceeds standard limits, causing slow rise times with passive resistors. It is suitable for systems requiring improved low-state noise margins without compromising fall times. Consider the 1.6V minimum supply voltage for low-power applications. Verify that the 5mA transient boost current meets the specific slew rate requirements of the target bus topology.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC4311 family of low-voltage I2C/SMBus accelerators. The 'I' suffix indicates the industrial temperature range variant (-40°C to +85°C), distinguishing it from the commercial grade version. The 'SC6' designation specifies the 6-lead plastic SC-70 package, offering a compact alternative to the DFN package for space-constrained designs.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The LTC1694 is a functionally similar SMBus accelerator but operates at higher voltages (2.7V–6V) and has different pinout characteristics. Direct substitution requires verifying supply voltage compatibility and ensuring the enable pin logic levels match the system design.