12 级二进制波纹计数器

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MC74C4040A 与标准 CMOS MC14040 的引脚输出相同。该器件输入兼容标准的 CMOS 输出;带有上拉电阻器,可兼容 LSTTL 输出。 该器件由 12 个主-从触发器组成。每个触发器的输出馈送到下一个触发器,每个输出处的频率为上一个的一半。该状态计数器在时钟输入的负向边前进一次。重置为异步和有效高电平。 由于内部波纹延迟,Q 输出的状态变化不会同时发生。因此,解码的输出信号容易发生解码尖峰,对于某些设计可能必须使用 HC4040A 的时钟进行门控。

  • 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 uA
  • High Noise Immunity Characteristic of CMOS Devices
  • In Compliance With JEDEC Standard No. 7A Requirements
  • Chip Complexity: 398 FETs or 99.5 Equivalent Gates
  • Pb-Free Packages are Available*

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MC74HC4040ADR2G

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2500

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MC74HC4040ADTR2G

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TSSOP-16

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2500

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6

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$0.1628

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260

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2500

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6

31

0.75

5.2

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