The CD4020B IC'S are ripple-carry binary counters. All counter stages are master-slave flip-flops. The state of a counter advances one count on the negative transition of each input pulse; a high level on the RESET line resets the counter to its all zeros state. Schmitt trigger action on the input-pulse line permits unlimited rise and fall times. All inputs and outputs are buffered.

Specification of CD4020 14-Stage Binary/Ripple Counter:

• Medium-speed operation.
• Fully static operation.
• Buffered inputs and outputs.
• 100% tested for quiescent current at 20 V.
• Standardized, symmetrical output characteristics.
• Fully static operation.
• Common reset.
• 5-V, 10-V, and 15-V parametric ratings.
• Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C.

Applications of CD4020 14-Stage Binary/Ripple Counter:

• Control counters.
• Timers.
• Frequency dividers.
• Time-delay circuits.