The CD4020 are 14-stage ripple carry binary counters, and the CD4040BC is a 12-stage ripple carry binary counter. The counters are advanced one count on the negative transition of each clock pulse. The counters are reset to the zero state by a logical "1" at the reset input independent of clock. Features Wide supply voltage range: 3.0V to 15V High noise immunity: 0.45 VDD (typ.) Low power TTL compatibility: Fan out of 2 driving 74Lor 1 driving 74LS Medium speed operation: 8 MHz typ. at VDD=10V Schmitt trigger clock input
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