Overview

Features and Benefits

  • Single Chip Provides Complete LocalTalk®/AppleTalk Port
  • Operates From a Single 5V Supply
  • ESD Protection to ±10kV on Receiver Inputs and Driver Outputs
  • Low Power: ICC = 2.4mA Typ
  • Shutdown Pin Reduces ICC to 0.5µA Typ
  • Receiver Keep-Alive Function: ICC = 65µA Typ
  • Differential Driver Drives Either Differential AppleTalk or Single-Ended EIA562 Loads
  • Drivers Maintain High Impedance in Three-State or with Power Off
  • Thermal Shutdown Protection
  • Drivers are Short-Circuit Protected

Product Details

The LTC1323 is a multi-protocol line transceiver designed to operate on AppleTalk or EIA562-compatible single-ended networks while operating from a single 5V supply. There are two versions of the LTC1323 available: a 16-pin version designed to connect to an AppleTalk network, and a 24-pin version which also includes the additional single-ended drivers and receivers necessary to create an Apple-compatible serial port. An on-board charge pump generates a ­5V supply which can be used to power external devices. Additionally, the 24-pin LTC1323 features a micropower keep-alive mode during which one of the single-ended receivers is kept active to monitor external wake-up signals. The LTC1323 draws only 2.4mA quiescent current when active, 65µA in receiver keep-alive mode, and 0.5µA in shutdown, making it ideal for use in battery-powered systems.

The differential driver can drive either differential AppleTalk loads or conventional single-ended loads. The driver outputs three-state when disabled, during shutdown, in receiver keep-alive mode, or when the power is off. The driver outputs will maintain high impedance even with output common-mode voltages beyond the power supply rails. Both the driver outputs and receiver inputs are protected against ESD damage to ±10kV.

Applications

  • LocalTalk Peripherals
  • Notebook/Palmtop Computers
  • Battery-Powered Systems

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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