SN54LS696, SN54LS697, SN54LS699, SN74LS696, SN74LS697, SN74LS699 SYNCHRONOUS UP/DOWN COUNTERS WITH OUTPUT REGISTERS ANDMULTIPLEXED 3-STATE OUTPUTS

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features

• 4-Bit Counters/Registers
• Multiplexed Outputs for Counter or Latched Data
• 3-State Outputs Drive Bus Lines Directly
• 'LS696 … Decade Counter, Direct Clear'LS697…Binary Counter,Direct Clear'LS699…Binary Counter, Synchronous Clear

description

These low-power Schottky LSI devices incorporate synchronous up/down counters,four-bit D-type registers, and quadruple two-line to one-line multiplexerswith three state outputs in a single 20-pin package. The up/down countersare programmable from the data inputs and feature enable P\ andenable T\ and a ripple-carry output for easy expansion. The register/counterselect input R/C\, selects the counter when low and the registerwhen high for the three-state outputs, Q_A, Q_B, Q_C, and Q_D. These outputs are rated at 12 and 24 milliamperes(54LS/74LS) for good bus driving performance.

Both the counter CCK and register clock RCK are positive-edge triggered.The counter clear CCLR\ is active low and is asynchronous on the'LS696 and 'LS697, synchronous on the 'LS699. Loading of the counter is accomplishedwhen LOAD\ is taken low and a positive transition occurs on thecounter clock CCK.

Expansion is easily accomplished by connecting RCO\ of the firststage to ENT\ of the second stage, etc. All ENP\ inputscan be tied common and used as a master enable or disable control.

View more information about generic part numbers:SN54LS697, SN74LS696, SN74LS697, SN74LS699

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