Interface I2C and SMBus Bus Buffers and Accelerators

LTM2883 - SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
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LTC1694-1 - SMBus/I²C Accelerator

Features

  • 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

Typical Application

LTC1694-1 Typical Application
LTC1694-1 Typical Application

Description

The LTC™1694-1 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC1694-1CS5#PBF SOT-23 S5 C 05-08-1635 Yes
LTC1694-1CS5#TRMPBF SOT-23 S5 C 05-08-1635 Yes
LTC1694-1CS5#TRPBF SOT-23 S5 C 05-08-1635 Yes
LTC1694-1IS5#PBF SOT-23 S5 I 05-08-1635 Yes
LTC1694-1IS5#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LTC1694-1IS5#TRPBF SOT-23 S5 I 05-08-1635 Yes


LTC1694-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC1694-1CS5#PBF SOT-23 C $1.56 Yes
LTC1694-1CS5#TRMPBF SOT-23 C $1.61 $1.35 Yes
LTC1694-1CS5#TRPBF SOT-23 C $1.61 $1.30 Yes
LTC1694-1IS5#PBF SOT-23 I $2.01 Yes
LTC1694-1IS5#TRMPBF SOT-23 I $2.01 $1.65 Yes
LTC1694-1IS5#TRPBF SOT-23 I $2.01 $1.60 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

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

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Design Tools

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