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HD74HC190 - Synchronous Up/Down Decade Counter

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.

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Datasheet Details

Part number HD74HC190
Manufacturer Renesas
File Size 342.29 KB
Description Synchronous Up/Down Decade Counter
Datasheet download datasheet HD74HC190 Datasheet
Additional preview pages of the HD74HC190 datasheet.

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Full PDF Text Transcription

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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 G input is low. A high at Enable G inhibits counting.
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