Product details

Technology family LS Function Encoder Configuration 8:3 Number of channels 1 Operating temperature range (°C) 0 to 70 Rating Catalog
Technology family LS Function Encoder Configuration 8:3 Number of channels 1 Operating temperature range (°C) 0 to 70 Rating Catalog
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6
  • 3-State Outputs Drive Bus Lines Directly
  • Encodes 8 Data Lines to 3-Line Binary (Octal)
  • Applications Include:
    • N-Bit Encoding
    • Code Converters and Generators
  • Typical Data Delay … 15 ns
  • Typical Power Dissipation … 60 mW

 

  • 3-State Outputs Drive Bus Lines Directly
  • Encodes 8 Data Lines to 3-Line Binary (Octal)
  • Applications Include:
    • N-Bit Encoding
    • Code Converters and Generators
  • Typical Data Delay … 15 ns
  • Typical Power Dissipation … 60 mW

 

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The 'LS348 circuits encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion. Outputs A0, A1, and A2 are implemented in three-state logic for easy expansion up to 64 lines without the need for external circuitry. See Typical Application Data.

 

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The 'LS348 circuits encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion. Outputs A0, A1, and A2 are implemented in three-state logic for easy expansion up to 64 lines without the need for external circuitry. See Typical Application Data.

 

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Technical documentation

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Type Title Date
* Data sheet 8-Line To 3-Line Priority Encoders With 3-State Outputs datasheet 01 Mar 1988
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note TI IBIS File Creation, Validation, and Distribution Processes 29 Aug 2002
Application note Designing With Logic (Rev. C) 01 Jun 1997
Application note Designing with the SN54/74LS123 (Rev. A) 01 Mar 1997
Application note Input and Output Characteristics of Digital Integrated Circuits 01 Oct 1996
Application note Live Insertion 01 Oct 1996

Design & development

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Evaluation board

14-24-LOGIC-EVM — Logic product generic evaluation module for 14-pin to 24-pin D, DB, DGV, DW, DYY, NS and PW packages

The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,

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PDIP (N) 16 View options
SOIC (D) 16 View options

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