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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I have read the datasheet, but I still don’t quite understand how it works. It is what I thought you were talking about originally.
The direction of the count is determined by the dtaasheet. This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs. Level changes at the enable input should be made only when the clock input is high.
The clock down up and load inputs are buffered to lower the drive requirement which significantly reduces the num- ber of clock drivers etc required for long parallel words. Two outputs have been made available to perform the cas.
Oct 8, 3. The output will change to agree with the data inputs independently of the level of the clock input. The problem I see with using a is simple, no reset pin.
Texas Instruments SN74191N Synchronous 4-Bit Up/Down Binary Counters
There’s bound to be something out there that will do exactly what you’re wanting. A high at the enable input inhibits counting. The counters can be. You May Also Like: You can put any binary number on the load inputs. Look at post 7, I posted a pinout I made as part of my PaintCAD package used for quick and dirty drawing of schematics. All typicals are at V. When the count 11 the chip is cleared. Not more than one output should be shorted at a time. There is no reset pin, which means you need to load into the presets pins 15, 1, 10, datashset and toggle load.
Oct 8, 6.
Datasheet(PDF) – National Semiconductor (TI)
Discussion in ‘ The Projects Forum ‘ started by cupcakeOct 8, This circuit ciunter 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 simultaneously when so instructed by the steering logic This mode of operation eliminates the output counting spikes normally associated with asynchro- nous ripple clock counters.
Again, not the best way, there are better. I still don’t get the part to terminate the count after three clock cycles period.
They are used for old style digital clocks time pieces. Countrr clock output for cascading. 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. Load Release Time Note 4. It does help us refer sources and parts.
Free Air Operating Temperature. The counter datwsheet fully programmable; that is, the outputs may. Datasheet — Product page Manufactured: Low Level Input Voltage. I think I have maybe I’ll try take a look and understand the datasheet first I’m looking to the datasheet right now, but didn’t notice anything.
Single down up count control line. Having said that, I notice cell phones and other devices have some really small wall warts that are 5V 1A, which I would have killed for in my TTL days.
This 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 at 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 dividers by simply modifying the count length with the preset inputs. Data Setup Time Note 4.
Oct 8, 7. Think pin 14 clear.
how counter works? | All About Circuits
Two outputs have been made available to perform dataseet cas- cading function: Order Number Package Number. No, create an account now. 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 steering logic.
Sep 20, 73 0. The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the clock when the counter overflows or underflows. Is that your entire count?
Quote of the day.
how 74191 counter works?
Look at internal schematics of the and for example. A HIGH at the enable input inhibits. A HIGH at the enable input inhibits counting.