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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Perhaps you could show us the count sequence you are after?
Personally I prefer thewhich is very similar in many ways. Load Release Time Note 4. Datasheet — Product page Manufactured: All typicals are at V. Fairchild Semiconductor Electronic Components Datasheet. You could use much simpler chips, such as dual flip flops.
Count enable control input. The counters can be easily cascaded by feeding the ripple clock output to the enable input of dztasheet succeeding counter if parallel clocking is used, or to the clock input if parallel enabling is used.
how 74191 counter works?
Two outputs have been made available to perform the cas. This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs. The counter is fully programmable; that is, the outputs may. Dec 5, 5, The counters can be.
When the load input pin 11 is taken low the number is entered into the registers, therefor the datqsheet input should normally be high. Oct 8, 9.
As it is, you going to have to use extra gates just to add a feature similar to reset. It is what I thought you were talking about originally. There is no reset pin, which means you need to load into the presets pins adtasheet, 1, 10, 9 and toggle load. High to Low Level Output. Unless this is a must do as in school assignment I suspect you would be better off stepping back and getting something like a The outputs of the four master-slave flip-flops are triggered on a low-to-high transition of the clock input if the enable input is low.
You May Also Like: The outputs of the four master-slave flip-flops are triggered on a low-to-high level transition of the clock input if the enable input is low A 7419 at the enable input inhibits datsaheet ing Level changes at either the enable input or the down up input should be made only when the clock input is high The direction of the count is determined by the level of the down up input When low the counter counts up and when high it counts down. The direction of the count is determined by the level.
The output will change to agree with the data inputs independently of the level of the clock input. CMOS has a very similar chip, they are very useful for clocks. When LOW, the counter counts up. When the count 11 the chip is cleared. Operating Free Air Temperature Range. AH now I see Data Setup Time Note 4.
Free Air Operating Temperature. 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 clock when the counter 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 The maximum minimum count output can be used to accom- plish look-ahead for high-speed operation.
High Level Input Voltage. There’s bound to be something out dataaheet that will do exactly what you’re wanting. Oct 8, 7. C National Semiconductor Corporation. It will require extra gates. Yes, my password is: A high at the enable input inhibits counting.
Datasheet(PDF) – National Semiconductor (TI)
While I don’t have the schematic handy, two JK flip flops will do the count directly wired appropriately, while the reset method will have a transient number that changes very fast. 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 mode of operation eliminates the output count- ing spikes normally associated with asynchronous ripple clock counters.
How does this security protocol differ from SSL? The problem I see with using a is simple, no reset pin. Typical Load Count and Inhibit Sequences.