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CD54HC4020 Datasheet

Part NameDescriptionManufacturer
CD54HC4020 High-Speed CMOS Logic 14-Stage Binary Counter Texas-Instruments
Texas Instruments Texas-Instruments
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Description
The ’HC4020 and ’HCT4020 are 14-stage ripple-carry binary counters. All counter stages are master-slave flip flops. The state of the stage advances one count on the negative clock transition of each input pulse; a high voltage level on the MR line resets all counters to their zero state. All inputs and outputs are buffered.

Features
• Fully Static Operation
• Buffered Inputs
• Common Reset
• Negative Edge Clocking
• Fanout (Over Temperature Range)
   - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
   - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55°C to 125°C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
   Logic ICs
• HC Types
   - 2V to 6V Operation
   - High Noise Immunity: NIL = 30%, NIH = 30% of VCC
      at VCC = 5V
• HCT Types
   - 4.5V to 5.5V Operation
   - Direct LSTTL Input Logic Compatibility,
      VIL= 0.8V (Max), VIH = 2V (Min)
   - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

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