MOTOROLA SEMICONDUCTOR TECHNICAL DATA Product Preview Dual 4-Stage Binary Ripple Counter with ÷ 2 and ÷ 5 Sections High–Performance Silicon–Gate CMOS The MC54/74HC390A is identical in pinout to the LS390.
The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
This device consists of two independent 4–bit counters, each composed of a divide–by–two and a divide–by–five section.
The divide–by–two and divide–by–five counters have separate clock inputs, and can be cascaded to implement various combinations of ÷ 2 and/or ÷ 5 up to a ÷ 100 counter.
Flip–flops internal to the counters are triggered by high–to–low transitions of th...

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