SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL. SDLS – DECEMBER – REVISED MARCH 3. POST OFFICE BOX . datasheet, pdf, data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Up/Down Counter with Mode Control. Category. Description, Synchronous 4-bit Up/down Counter with Mode Control. Company, Fairchild Semiconductor. Datasheet, Download datasheet.
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how 74191 counter works?
Synchronous operation is provided by hav. This mode of operation eliminates the output count.
The outputs of the four master-slave flip-flops are triggered. A HIGH at the enable input inhibits.
how counter works? | All About Circuits
Level changes at either the enable input or the. The direction of the count is determined by the level.
When LOW, the counter counts up. The counter is fully programmable; that is, the outputs may. Two outputs have been made available to perform the cas.
The latter output produces a high-level output pulse with a. The counters can be. Order Number Package Number.
Texas Instruments SNN Synchronous 4-Bit Up/Down Binary Counters | Found Integrated Circuits
Devices also available in Tape and Reel. Fairchild Semiconductor Electronic Components Datasheet. Synchronous operation is provided by hav- ing all flip-flops clocked simultaneously, so that the outputs change simultaneously when so instructed by the steering logic.
This mode of operation eliminates the output count- ing spikes normally associated with asynchronous ripple clock counters.
A HIGH at the enable input inhibits counting. The counter is fully programmable; that is, the outputs may be preset to either level by placing a LOW on the load input and entering the desired data 741991 the data inputs. The output will change independent of the level of the clock input.
This feature allows the counters to be used as modulo-N divid- ers by simply modifying the count length with the preset inputs. Two outputs have been coynter available to perform the cas- cading function: The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the clock when the 741911 overflows or underflows. The ripple clock output produces a low-level output pulse equal in width to the low-level portion of the clock input when an overflow or underflow condition exists.
The counters can be easily cascaded by feeding the ripple clock output to the enable input of the succeeding counter if parallel clocking is used, or to the clock input if parallel enabling is used.