The HCC4XXXB (extended temperature range) and HCF4XXXB (intermediate temperature range) are monolithic integrated circuits, available in 14- lead dual in-line for 4024B and 16-lead dual in-line for 4020B, 4040B plastic or ceramic package and plastic micropackage.
The HCC/HCF4020B, 4024B, and 4040B 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 stage. Schmitt trigger action on the input- pulse line permits unlimited clock rise and fall times. All inputs and outputs are buffered.