This circuit is a synchronous up down 4-bit binary counter. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counter with Dual Clock. SN54/74LS is an UP/DOWN MODULO Binary Counter. Separate. Count Up and Count Down Clocks are used and in either counting mode the.
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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. Do you already have an account? I have read the data-sheets and read quite a bit on this forum as well, but nothing I try seems to work.
I followed your advice and held pin 11 load pin low and held pin 14 reset high and the counter counted! Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.
The information is contained in the truth-table in the datasheet. I’ve tried many different set-ups but haven’t had any luck. Discussion in ‘ The Projects Forum ‘ started by gcentauriJan 25, We’ll need the schematic you’re useing to help. Right now I have a chip debouncing a switch and and output from that going into the count-up terminal of the Datasheets, Manuals or Parts.
Jan 26, 8. Jan 26, 7. Welcome to our site!
Datasheet(PDF) – Fairchild Semiconductor
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. Terminal count up pin 12 connects to clock pulse up pin 5 of the next stage. No, create an account now. I hope I’ve described my situation well enough, I just can not figure out why the counter isn’t counting.
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Often there is a timing diagram that contains the same information along with the critical timing information as well. Jan 25, 3 0.
Your name or email address: I’d would not go with the because it counts in binary. Jan 25, 1. Do you have LOAD pin 11 held high? Russlk New Member Dec 19, Hardware, Tools, and Toolchain This id Part 1 of a step-by-step guide to bringing custom microcontroller designs to life.
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74LS Datasheet pdf – Synchronous 4-Bit Binary Counter with Dual Clock – Fairchild Semiconductor