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SN74LS399-具有存储器的四路 2 输入多路复用器
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TI产品 - SN74LS399介绍

SN74LS399 - 具有存储器的四路 2 输入多路复用器

SN74LS399是TI德州仪器公司的一款解码器/编码器/多路复用器产品，SN74LS399是具有存储器的四路 2 输入多路复用器，本站介绍了SN74LS399的封装应用图解、特点和优点、功能等，并给出了与SN74LS399相关的TI元器件型号供参考。

SN74LS399 - 具有存储器的四路 2 输入多路复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - 德州仪器

产品描述

This monolithic quadruple two-input multiplexer with storage provides essentially the equivalent functional capabilities of two separate MSI functions (SN54LS157/SN74LS157 and SN54LS175/SN74LS175) in a single 16-pin package.

When the word-select input is low, word 1 (A1, B1, C1, D1) is applied to the flip-flops. A high input to word select will cause the selection of word 2 (A2, B2, C2, D2). The selected word is clocked to the output terminals on the positive-going edge of the clock pulse.

Typical power dissipation is 37 milliwatts. The SN54LS399 is characterized for operation over the full military range of -55°C to 125°C. The SN74LS399 is characterized for operation from 0°C to 70°C.

产品特性

  • Single-Rail Outputs on 'LS399
  • Selects One of Two 4-Bit Data Sources and Stores Data Synchronously with System Clock
  • Applications:
    • Dual Source for Operands and Constants in Arithmetic Processor; Can Release Processor Register Files for Acquiring New Data
    • Implement Separate Registers Capable of Parallel Exchange of Contents Yet Retain External Load Capability
    • Universal Type Register for Implementing Various Shift Patterns: Even Has Compound Left-Right Capabilities

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