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Overview

Features and Benefits

  • Low Supply Current: 300µA
  • Two Receivers Kept Alive in Shutdown
  • ESD Protection Over ±10kV
  • Operates from a Single 5V Supply
  • Uses Small Capacitors: 0.1µF
  • Operates to 120kBaud
  • Three-State Outputs Are High Impedance When Off
  • Output Overvoltage Does Not Force Current Back into Supplies
  • RS232 I/O Lines Can Be Forced to ±25V Without Damage
  • Pin Compatible with LT1137A and LT1237
  • Flowthrough Architecture

Product Details

The LTC1349 is a 3-driver/5-receiver RS232 transceiver with very low supply current. In the no load condition, the supply current is only 300µA. The charge pump only requires four 0.1µF capacitors.

In Shutdown mode, two receivers are kept alive and the supply current is 35µA. All RS232 outputs assume a high impedance state in Shutdown and with the power off.

The LTC1349 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120k baud with a 2500pF, 3kΩ load. Both driver outputs and receiver inputs can be forced to ±25V without damage, and can survive multiple ±10kV ESD strikes.

Applications

  • Notebook Computers
  • Palmtop Computers

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.

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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