8 输入多工器(3 态)

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MC54/74HC251 与 LS251 的引脚输出相同。该器件输入可兼容标准 CMOS 输出;通过上拉电阻,可兼容 LSTTL 输出。此器件根据地址输入的确定,选择八个二进制数据输入之一。输出启用引脚必须为低电平才能使得选择的数据显示在输出处。如果输出启用为高电平,则 Y 和 Y 输出均为高阻抗状态。此 3 态特性使得 HC251 能够用于总线导向系统。HC251 的功能与 HC251 相似,但没有 3 态输出。

  • Desktop
  • Output Drive Capability: 10 LSTTL Loads
  • Outputs Directly Interface to CMOS, NMOS, and TTL
  • Operating Voltage Range: 2 to 6 V
  • Low Input Current: 1 A
  • High Noise Immunity Characteristic of CMOS Devices
  • These are PbFree Devices

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MC74HC251ADG

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MC74HC251ADR2G

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MC74HC251ADTG

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MC74HC251ADTR2G

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NLV74HC251ADR2G

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