Features and Benefits

  • Improves SMBus/I2C Rise Time Transition
  • Ensures Data Integrity with Multiple Devices on the SMBus/I2C
  • Improves Low State Noise Margin
  • Wide Supply Voltage Range: 2.7V to 6V
  • Parallel Multiple LTC1694-1 Devices for Increased Drive
  • Low Profile (1mm) SOT-23 (ThinSOT) Package

Product Details

The LTC1694-1 is a dual SMBus active pull-up designed to enhance data transmission speed and reliability under all specified SMBus loading conditions. The LTC1694-1 is also compatible with the Philips I2C Bus.

The LTC1694-1 allows multiple device connections or a longer, more capacitive interconnect, without compromising slew rates or bus performance, by supplying a high pull-up current of 2.2mA to slew the SMBus or I2C lines during positive bus transitions.

During negative transitions or steady DC levels, the LTC1694-1 sources zero current. External resistors, one on each bus line, trigger the LTC1694-1 during positive bus transitions and set the pull-down current level. These resistors determine the slew rate during negative bus transitions and the logic low DC level.

The LTC1694-1 is available in a 5-pin SOT-23 package.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

LTC1694-1 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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