LTC1323 - Single 5V AppleTalk® Transceiver


  • 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 DifferentialAppleTalk or Single-Ended EIA562 Loads
  • Drivers Maintain High Impedance in Three-State or with Power Off
  • Thermal Shutdown Protection
  • Drivers are Short-Circuit Protected

Typical Application

LTC1323 Typical Application


The LTC®1323 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.


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
LTC1323CS16#PBF SO-16 S C 05-08-1610 (S16) Yes
LTC1323CS16#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LTC1323CSW#PBF SW-24 SW C 05-08-1620 (SW24) Yes
LTC1323CSW#TRPBF SW-24 SW C 05-08-1620 (SW24) Yes

LTC1323 Package Drawing
LTC1323 Package Drawing
LTC1323 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
LTC1323CS16#PBF SO-16 C $5.60 $4.40 Yes
LTC1323CS16#TRPBF SO-16 C $4.46 Yes
LTC1323CSW#PBF SW-24 C $6.10 $4.80 Yes
LTC1323CSW#TRPBF SW-24 C $4.90 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.

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  • LocalTalk Peripherals
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