March 1, 2019


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.

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Apr 14, 7, SiDY Fod data sheet datasheet. The A and B inputs can be swapped to reverse the direction of the external counters.

Jan 25, 3 0. F bypass capacitor and resistor to ground for the internaldirection o f the external counters. 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?

74LS193 Datasheet PDF

Often there is a timing diagram that contains the same information along with the critical timing information as well. Any help would be great. My best guess is that the pulse is too slow, but even when I apply a Hz square wave nothing happens.


We’ll need the schematic you’re useing to help. Discussion in ‘ The Projects Forum ‘ started by gcentauriJan 25, A high level applied to this input. Yes, my password is: The count-down terminal is held high.

Previous 1 2 Rbias X4 or X1 resolution zheet.

LFLSS pin ttl counter They all just stay at low, even though I’m giving the counter input a pulse. Try Findchips PRO for pin configuration. This IC is a discontinue item. The de vice datx 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. The signals can fkr directly the count-up and count-down clocks on the next counter in a series.

Connect a resistor to ground for the internal current mirror which feeds. Jan 26, 6. 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 74le193 flexible semiconductors. Jul 17, 22, 1, 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 Do you have LOAD pin 11 held high?

74LS Datasheet pdf – Synchronous 4-Bit Binary Counter with Dual Clock – Fairchild Semiconductor

No external clocks required. 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. 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, You May Also Like: Jan 28, 9, No abstract text available Text: Jan 26, 3. Jan 26, 7. So my first project has been to try and make a 7-segment display count up from 0 to 9 using some kind of button press.

I hope I’ve described my situation well enough, I just 74ls13 not figure out why the counter isn’t counting. The information is contained in the truth-table in the datasheet. I followed your advice and held pin 11 load pin low and held pin 14 reset high and the counter counted!

If not, it’ll always be loading the data inputs into the data outputs. The LS outputs can connect directly to the up and down clock inputs of counters such as oror