Detalles del producto

Technology family LS Number of channels 2 Operating temperature range (°C) 0 to 70 Rating Catalog Supply current (max) (µA) 11000
Technology family LS Number of channels 2 Operating temperature range (°C) 0 to 70 Rating Catalog Supply current (max) (µA) 11000
SOP (NS) 16 79.56 mm² (10.2 mm × 7.8 mm) SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm) PDIP (N) 16 181.42 mm² (19.3 mm × 9.4 mm)
  • Designed Specifically for High-Speed:
    • Memory Decoders
    • Data Transmission Systems
  • Two Fully Independent 2- to 4-Line
    Decoders/Demultiplexers
  • Schottky clamped for High Performance

  • Designed Specifically for High-Speed:
    • Memory Decoders
    • Data Transmission Systems
  • Two Fully Independent 2- to 4-Line
    Decoders/Demultiplexers
  • Schottky clamped for High Performance

These Schottky-clamped TTL MSI circuits are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast-enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the Schottky-clamped system decoder is negligible.

The circuit comprises two individual two-line to four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications.

All of these decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and to simplify system design. The SN54LS139A and SN54S139 are characterized for operation range of –55°C to 125°C. The SN74LS139A and SN74S139A are characterized for operation from 0°C to 70°C.

These Schottky-clamped TTL MSI circuits are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast-enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the Schottky-clamped system decoder is negligible.

The circuit comprises two individual two-line to four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications.

All of these decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and to simplify system design. The SN54LS139A and SN54S139 are characterized for operation range of –55°C to 125°C. The SN74LS139A and SN74S139A are characterized for operation from 0°C to 70°C.

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Dual 2-Line To 4-Line Decoders/Demultiplexer datasheet (Rev. A) 30/09/2009

Diseño y desarrollo

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Placa de evaluación

14-24-LOGIC-EVM — Módulo de evaluación genérico de productos lógicos para encapsulados D, DB, DGV, DW, DYY, NS y PW de

El módulo de evaluación (EVM) 14-24-LOGIC-EVM está diseñado para admitir cualquier dispositivo lógico que se encuentre en un encapsulado D, DW, DB, NS, PW, DYY o DGV de 14 a 24 pines.

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOP (NS) 16 Ultra Librarian
SOIC (D) 16 Ultra Librarian
PDIP (N) 16 Ultra Librarian

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