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HD74HC191

Part Number	HD74HC191
Manufacturer	Renesas
Description	Synchronous Up/Down 4-bit Binary Counter
Published	Dec 4, 2017
Detailed Description	HD74HC190, HD74HC191 Synchronous Up/Down Decade Counter (Single Clock Line) Synchronous Up/Down 4-bit Binary Counter (S...
Datasheet	HD74HC191 PDF File

Overview

HD74HC190, HD74HC191 Synchronous Up/Down Decade Counter (Single Clock Line) Synchronous Up/Down 4-bit Binary Counter (Single Clock Line) REJ03D0587-0300 Rev.
3.
00 Jan 31, 2006 Description The HD74HC190 is a 4-bit decade counter and the HD74HC191 is a 4-bit binary counter.
Synchronous counting operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the steering logic.
This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters.
The outputs of the four flip-flops are triggered on a low-to-high-level transition of the clock input if the Enable ...

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