MC74HC4020A
14-Stage Binary Ripple Counter
High−Performance Silicon−Gate
CMOS
The MC74C4020A is identical in pinout to the standard
CMOS MC14020B.
The device inputs are compatible with standard
CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
This device consists of 14 master−slave flip−flops with 12 stages brought out to pins.
The output of each flip−flop feeds the next and the frequency at each output is half of that of the preceding one.
Reset is asynchronous and active−high.
State changes of the Q outputs do not occur simultaneously because of internal ripple delays.
Therefore, decoded output signals are subject to decoding spikes and may have to be gated wit...