Texas Instruments SNJ54LS697J
- Part Number:
- SNJ54LS697J
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6389579-SNJ54LS697J
- Description:
- Synchronous Up/Down Counters With Output Registers And Multiplexed 3-State Outpu
- Datasheet:
- sn54ls697
- FunctionCounter
- Bits (#)4
- Technology familyLS
- Supply voltage (min) (V)4.75
- Supply voltage (max) (V)5.25
- Input typeBipolar
- Output type3-State
- FeaturesHigh speed (tpd 10-50ns)
- Operating temperature range (°C)-55 to 125
- RatingMilitary
These low-power Schottky LSI devices incorporate synchronous up/down counters, four-bit D-type registers, and quadruple two-line to one-line multiplexers with three state outputs in a single 20-pin package. The up/down counters are programmable from the data inputs and feature enable P\ and enable T\ and a ripple-carry output for easy expansion. The register/counter select input R/C\, selects the counter when low and the register when high for the three-state outputs, QA, QB, QC, and QD. 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 accomplished when LOAD\ is taken low and a positive transition occurs on the counter clock CCK.
Expansion is easily accomplished by connecting RCO\ of the first stage to ENT\ of the second stage, etc. All ENP\ inputs can be tied common and used as a master enable or disable control.
Counter Single 4-Bit Binary UP/Down 20-Pin CDIP Tube
French Electronic Distributor since 1988
SYNCHRONOUS UP/DOWN COUNTERS WIT
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