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Interruptores y multiplexores
Multiplexores y codificadores digitales

SN54LS148

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Codificadores de prioridad de 10 líneas a 4 líneas y de 8 líneas a 3 líneas

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Hoja de datos

SN54LS148

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Detalles del producto

Technology family LS Function Encoder Configuration 8:3 Number of channels 1 Operating temperature range (°C) -55 to 125 Rating Military
Technology family LS Function Encoder Configuration 8:3 Number of channels 1 Operating temperature range (°C) -55 to 125 Rating Military
CFP (W) 16 69.319 mm² (— mm × — mm) CDIP (J) 16 135.3552 mm² (— mm × — mm) LCCC (FK) 20 79.0321 mm² (— mm × — mm)
  • '147, 'LS147
    • Encodes 10-Line Decimal to 4-Line BCD
    • Applications Include:
      • Keyboard Encoding
      • Range Selection
  • '148, 'LS148
    • Encodes 8 Data Lines to 3-Line Binary (Octal)
    • Applications Include:
      • N-Bit Encoding
      • Code Converters and Generators

NOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.
  • '147, 'LS147
    • Encodes 10-Line Decimal to 4-Line BCD
    • Applications Include:
      • Keyboard Encoding
      • Range Selection
  • '148, 'LS148
    • Encodes 8 Data Lines to 3-Line Binary (Octal)
    • Applications Include:
      • N-Bit Encoding
      • Code Converters and Generators

NOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively.

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos SN54147, SN54148, SN54LS147, SN54LS148,SN74147, SN74148 (TIM9907), SN74LS147, SN datasheet (Rev. B) 26/05/2004
* SMD SN54LS148 SMD 78027012A 21/06/2016

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