Hitachi HD74HC4020
The HD74HC4020 is a 14 stage counter. This device is incremented on the falling edge (negative transition) of the input clock, and all its output is reset to a low level by applying a logical high on its reset input.| Part No. | HD74HC4020 |
|---|---|
| Datasheet | HD74HC4020 Download |
| Manufacturer |  Hitachi |
| Description | 14-stage Binary Counter |
| Buy | Stock & Price |
DESCRIPTION
The HD74HC4020 is a 14 stage counter.FEATURES
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● High Speed Operation: tpd (Clock to Q1) = 14 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Clock Reset L L X H Outputs State No change Advance to next state All output are low HD74HC4020 Pin Arrangement Q12 Q13 Q14 Q6 Q5 Q7 Q4 GND 1 2 3 4 5 6 7 8 (Top view) Q13 Q14 Q6 Q5 Q7 Q4 Q12 Q11 Q10 Q8 Q9 R C 16 VCC 15 Q11 14 Q10 13 Q8 12 Q9 11 Reset 10 Clock 9 Q1 Q1 Block Diagram Q1 Clock C Q C Q R Reset C Q C Q R Q4 C Q C Q R Q5 C Q C Q R Q12 C Q C Q R Q13 C Q C Q R Q14 2 HD74HC4020 Timing Diagram 1 2 4 8 16 32 64 128 256 512 1,024 2,048 4,096 8,192 16,384 Clock Reset Q1 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 3 HD74HC4020 DC Characteristics Ta = 25°C Item Input voltage Symbol VIH Ta = –40 to +85°C Max — — — 0.5 1.35 1.8 — — — — — 0.1 0.1 0.1 0.33 0.33 ±1.0 40 µA...
