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DM74S161 - Synchronous 4-Bit Binary Counters

Description

These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed counting designs.

They are 4-bit binary counters.

The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation.

Features

  • s Synchronously programmable s Internal look-ahead for fast counting s Carry output for n-bit cascading s Synchronous counting s Load control line s Diode-clamped inputs Ordering Code: Order Number DM74S161N DM74S163N Package Number Package.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DM74S161 • DM74S163 Synchronous 4-Bit Binary Counters August 1986 Revised April 2000 DM74S161 • DM74S163 Synchronous 4-Bit Binary Counters General Description These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed counting designs. They are 4-bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count enable inputs and internal gating. This mode of operation eliminates the output counting spikes which are normally associated with asynchronous (ripple clock) counters.
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