LTC1694-1CS5#TRMPBF

Signal Buffers, Repeaters, Splitters Overview

The LTC1694-1CS5#TRMPBF is a dual SMBus active pull-up accelerator designed to enhance data transmission speed and reliability under specified loading conditions. It operates within a supply voltage range of 2.7V to 6V, drawing a typical supply current of 45mA when inactive. The device provides a maximum pull-up current of 2.2mA during positive bus transitions, ensuring a maximum rise time of 1ms with a bus capacitance of 200pF. It features an input threshold voltage of 0.65V and a slew rate detector threshold of 0.5V/ms. The component supports a maximum operating frequency of 100kHz and is housed in a 5-lead TSOT-23 package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Dual-channel active pull-up architecture for simultaneous SMBus or I2C line acceleration
• High-speed transition enhancement via 2.2mA pull-up current activation during positive bus transitions
• Zero current sourcing during negative transitions or steady DC levels to maintain low state noise margins
• Parallel connection capability for increased drive strength in high-capacitance bus environments

Signal Buffers, Repeaters, Splitters Applications

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

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific suffix 'CS5' indicates the commercial temperature range (0°C to 70°C) rather than the industrial range (-40°C to 85°C). Confirm the '#TRMPBF' designation corresponds to tape and reel packaging as required by the assembly process. Ensure compatibility with the target system's SMBus/I2C voltage levels within the 2.7V to 6V operational window.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when standard resistive pull-ups fail to meet rise time requirements due to high bus capacitance. The device is suitable for systems requiring improved low-state noise margins without increasing static power consumption. Consider paralleling multiple units if the total bus capacitance exceeds 200pF to achieve necessary slew rates. External resistors must be calculated to trigger the internal comparator while maintaining logic low specifications.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the LTC1694-1 family of SMBus accelerators manufactured by Analog Devices Inc. It serves as a specialized interface buffer that replaces or supplements traditional passive pull-up networks. The device is distinct from general-purpose bus buffers by its active, conditional current sourcing mechanism optimized specifically for SMBus and I2C protocol timing constraints.

Signal Buffers, Repeaters, Splitters Replacement Considerations

LTC1694-1IS5#TRPBF: Industrial temperature grade variant (-40°C to 85°C) with identical electrical characteristics.