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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Dounter 24, 21, 2, Oct 8, 9. The direction of the count is determined by the level. Think pin 14 clear. Oct 8, 7. Oct 8, 2. Cascadable for n-bit applications.
High Level Input Voltage. Datashert problem I see with using a is simple, no reset pin. Ripple clock output for cascading. Level changes at the enable input should be made only when the clock input is high. 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.
Texas Instruments SNN Synchronous 4-Bit Up/Down Binary Counters | Found Integrated Circuits
Quote of the day. A simple combination of inverters and a 4 input AND gate will detect any number, including a 3 count, you need. Order Number Package Number. How does this security protocol differ from SSL? I’m spoiled, I have cultivated a really deep stock of parts so I can write articles and wire stuff on whim. If you have a choice CMOS is much better, since it will operate off of any voltage you care to use, no countrr power supplies needed.
All typicals are at V. Datasheet — Product page. The clock down up and load xatasheet are buffered to lower the drive requirement couner significantly reduces the num- ber of clock drivers etc required for long parallel words. Jul 26, 2, 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. Operating Free Air Temperature Range. Do you already have an account?
Look at internal schematics of the and for example. AH now I see I tend to use diode gates a lot, they are easy to lay out and do the job. Data Setup Time Note 4. The counters can be easily cascaded by feeding the ripple clock output to the enable input of the succeeding counter if parallel daatasheet is used, or to the clock input if parallel enabling is used.
Your name or email address: This circuit is a synchronous reversible up down counter The is a 4-bit binary counter Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coounter when so instructed by the steering logic This mode of operation eliminates the output counting spikes normally associated with asynchro- nous ripple clock counters.
Oct 8, 6. Again, not the best way, there are better. Is that your entire count? When LOW, the counter counts up. There is no reset pin, which means you need to load into the presets pins 15, 1, 10, 9 and toggle load.
Texas Instruments SN74191N Synchronous 4-Bit Up/Down Binary Counters
A HIGH at the enable input inhibits counting. I still don’t get the part to terminate the count after three clock cycles period. When the count 11 the chip is cleared. BTW, most counters are sequential, which means a 3 count would be something like The counters can be. Synchronous counrer is provided by hav- ing all flip-flops clocked simultaneously, so that the outputs change simultaneously when so instructed by the steering logic.
It will require extra gates. It will make great sense once you watch it. For example, see Project: Oct 8, 8. There’s bound to be something out there that will do exactly what you’re wanting. Two outputs have been made available to perform the cas- cading function ripple clock and maximum minimum count The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the ddatasheet when the counter overflows or underflows The ripple clock output produces a low-level output pulse equal in width to datasgeet 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 The ddatasheet minimum count output can be used to accom- plish look-ahead for high-speed operation.
A high at the enable input inhibits counting.