74HC390 DATASHEET PDF

See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. ORDERING INFORMATION. 74HC Datasheet, 74HC Dual Decade Ripple Counter Datasheet, buy 74HC 74HC Semiconductors are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 74HC Semiconductors.

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But the larger counter chips that incorporate several like stages do not have access to the divide-by-two stages so you can’t do that. Apr 14, 6. Mikebits Well-Known Member Sep 1, Space Varmint New Member Sep 3, After that, you can post your question and our members will help you out.

74HC table of pin connections? | Electronics Forums

If I remember correctly it is an asynchronous signal. But you’ll still potentially have a non-symmetrical Qd output if it’s not a straight binary counter. Is the Qd output the divide by 10 frequency?

Well those pins are not on the pinout. If they’re ripple counters, they’ll ripple in cascade.

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74HC390 Datasheet

Potentiometer Questions Started by norbss Yesterday at Apr 14, 4. Just saying hello Started by MichaelaJoy Yesterday at 6: It was not a stupid question. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Using a Qd output as the gate input for a frequency counter would be a bad idea!

Articles Top Articles Search resources. The Qd output of most any counter that is not a pure binary counter is often non-symmetrical, that is, the output is not a perfect square wave.

Thread starter Space Varmint Start date Sep 1, You’ll need to choose a username for the site, which only take a couple of moments here.

You’re maybe confusing this with the term “symmetrical”. However, if you don’t use the outputs to drive a display, you can dqtasheet the divide-by-2 section with the divide-by-five section so that the divide-by-two section is last in each decade chain and then you WILL have a symmetrical output.

And just because a counter is a synchronous counter doesn’t mean that it’s synchronous in every sense or will be synchronous in cascade. Apr 14, 3. Forums New posts Search forums.

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MCHC Datasheet(PDF) – ON Semiconductor

BrownOut Banned Sep 1, Apr 14, 8. Media New media New comments Search media. Design 74HC dividers. You do have to be careful with counters. Similar Dwtasheet Parallel Pin Connections.

Space Varmint New Member Sep 1, Apr 14, 2. By continuing to use this site, you are consenting to our use of cookies. But if the OP is only interested in clocking a subsequent stage, symmetrical output isn’t required. Datasheef think I got it now.

74HC/HCT390 Dual Decade Ripple Counter

Apr 14, 9. I intend to use the 74hc data sheet: You have to use a series counter to get full synchronous operation in all phases. Apr 14, 7. Would it be suitable to run into another decade counter and get valid divide by ten BCD on all Q outputs if I run Qd from one into the clock of another?

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