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aip74hc/hct147
10-to-4 line priority encoder

the aip74hc/hct147 9-input priority encoders accept data from nine active low inputs (a()0 toa()8) and provide a binary representation on the four active low outputs (y()0 toy()3). a priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with input linea()8 having the highest priority.

the devices provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. the “zero” is encoded when all nine data inputs are high, forcing all four outputs high.


  • 主要特点

  • 产品文档

  • input levels:

    for aip74hc147: cmos level

    for aip74hct147: ttl level

  • encodes 10-line decimal to 4-line bcd

  • useful for 10-position switch encoding

  • used in code converters and generators

  • specified from -40℃ to 105℃

  • packaging information: dip16/sop16/tssop16


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