54LS190 - Synchronous 4-Bit Up/Down Counters

National Semiconductor

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Datasheet Details

Part number	54LS190
Manufacturer	National Semiconductor
File Size	180.58 KB
Description	Synchronous 4-Bit Up/Down Counters
Datasheet	54LS190-NationalSemiconductor.pdf

54LS190 Product details

Description

These circuits are synchronous reversible up down counters The LS191 is a 4-bit binary counter and the LS190 is a BCD counter Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change simultaneously 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 master-slave flip-flops are triggered on a low-to-high level t

Features

Y Y Y Y Y Y Y Y Y Y Counts 8-4-2-1 BCD or binary Single down up count control line Count enable control input Ripple clock output for cascading Asynchronously presettable with load control Parallel outputs Cascadable for n-bit.

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Published: Mar 25, 2014 |