SN54/74LS is an UP/DOWN MODULO Binary Counter. Separate. Count Up and Count Down Clocks are used and in either counting mode the. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counter with Dual Clock. be preset to either level by entering the desired data at the inputs while the load input is LOW. The output will change independently of the count pulses.

Author: Kabei Mukazahn
Country: Qatar
Language: English (Spanish)
Genre: History
Published (Last): 11 November 2007
Pages: 398
PDF File Size: 19.74 Mb
ePub File Size: 20.16 Mb
ISBN: 880-9-47887-298-8
Downloads: 29048
Price: Free* [*Free Regsitration Required]
Uploader: Gubar

Guaranteed by design, not subject to production testing. If not, it’ll always be loading the data inputs into the data outputs. Confirm that 5V power is present on the Power pin pin 16 flr ground is present on pin 8. Jan 26, 4. A high level applied to this input selects X4. The counter chip I had on hand was aand I’ve spend a lot of time reading up on it and trying to make it work, but for the life of me I can’t get the thing to count. Jan 26, 5. When I flip the switch I know I’m getting a slow pulse maybe that’s the problem, and if so, is there a circuit I can build to make a quick single pulse?

Yes, my password is: The count-down terminal is 74le193 high. A resistor connected between this input. Sheey 25, 1.

No, create an account now. Jan 28, 9, Mar 24, 21, 2, AT AT counter schematic diagram using shift register ttl ttl logic diagram shift register 74ls13 diagram of 16 bit counter counter shift register SIGNAL PATH designer function table half-adder by using D flip-flop.


Jan 26, 6. Jan 26, 9.

Often there is a timing diagram that contains the same information along with the critical timing information as well. Try Findchips PRO for pin configuration. This IC is a discontinue item.

pin configuration datasheet & applicatoin notes – Datasheet Archive

Breakthrough in Nanoimprint Lithography Could Revolutionize Flexible Semiconductors Collaborative efforts from UW Madison and partnering Universities have developed a new technique to create low cost, high power flexible semiconductors.

You May Also Like: Jan 26, I followed your advice and held pin 11 load pin low and held pin 14 reset high and the counter counted!

A high level applied to this input. Connect a resistor to ground forreverse the direction of the external counters. The counters have separate count-up and count-down clock inputs CPu andstate or state This was my first experiment with digital logic though, so maybe it will just make more sense as I work with things. Jan 26, 7.

Do you already have an account? I’m wondering if I’m not sending it a pulse that it can recognize as a clock cycle, or if there’s just something weird with the chip. Jul 17, 22, 1, F bypass capacitor and resistor to ground for the internaldirection o f the external counters. The LFLS outputs can connect directly to the up and down clock inputs of counters such as or They all just stay at low, even though I’m giving the counter input a pulse.


(PDF) 74193 Datasheet download

Pin CLK is the clock signal, RST theloading of the start value is the only feature not inherent in the circuit that is present in the The LS outputs can connect directly to the up and down clock inputs of counters such as oror Jan 25, 3 0. Connect the encoder quadrature outputs to the A and B inputs. The A and B inputs can be swapped to reverse the direction of the external counters.

I hope I’ve described my situation well enough, I just can not figure out why the counter isn’t counting. Do you have LOAD pin 11 held high? The de vice can be cleared at any time by the asynchronous reset pin – it may also be loaded in parallel by activating the asyn chronous parallel load pin.

We’ll need the schematic you’re useing to help. Apr 14, 7, Right now I have a chip debouncing a switch and and output from that going into the count-up terminal of the InputThe A and B inputs can be swapped to reverse the direction of the external counters.

My best guess is that the pulse is too slow, but even when I apply a Hz square wave nothing happens. Nov 20, 2.