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MC74HC390A

Part Number	MC74HC390A
Manufacturer	Motorola
Description	Dual 4-Stage Binary Ripple Counter
Published	Mar 12, 2006
Detailed Description	MOTOROLA SEMICONDUCTOR TECHNICAL DATA Product Preview Dual 4-Stage Binary Ripple Counter with ÷ 2 and ÷ 5 Sections Hig...
Datasheet	MC74HC390A PDF File

Overview

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 the clock input.
A separate, asynchronous reset is provided for each 4–bit counter.
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 should not be used as clocks or strobes except when ga...

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