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DM74LS191, DM74LS190 Datasheet - National Semiconductor

DM74LS191 Synchronous 4-Bit Up/Down Counters

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.

DM74LS191 Features

* Y Counts 8-4-2-1 BCD or binary Y Single down up count control line Y Count enable control input Y Ripple clock output for cascading Y Asynchronously presettable with load control Y Parallel outputs Y Cascadable for n-bit applications Y Average propagation delay 20 ns Y Typical clock frequency 25 MHz

DM74LS190-NationalSemiconductor.pdf

This datasheet PDF includes multiple part numbers: DM74LS191, DM74LS190. Please refer to the document for exact specifications by model.
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Datasheet Details

Part number:

DM74LS191, DM74LS190

Manufacturer:

National Semiconductor

File Size:

125.07 KB

Description:

Synchronous 4-bit up/down counters.

Note:

This datasheet PDF includes multiple part numbers: DM74LS191, DM74LS190.
Please refer to the document for exact specifications by model.

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TAGS

DM74LS191 DM74LS190 Synchronous 4-Bit Down Counters National Semiconductor

DM74LS191 Distributor