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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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The TTL counter is such a beast. Well those pins are not on the pinout. Forums New posts Search forums. For instance, the synchronous decade counter is synchronous in its counting only. Media New media New comments Search media.

74HC – Dual Decade Ripple Counter

Space Varmint New Member Sep 1, But if the OP is only interested in clocking a subsequent stage, symmetrical output isn’t required. Apr datssheet, 4. Parallel load and reset are asynchronous operations. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Hello First question here.

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, 2. Potentiometer Questions Started by norbss Yesterday at Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Just saying hello Started by MichaelaJoy Yesterday at 6: 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.

Thread starter Space Varmint Start date Sep 1, Apr 14, 3. I know the pin strappings for divide by 4 example 14 to 215 to 3datashret to Datashret1 in and 13 out and divide by from a Mr Carlson’s Lab YouTube clip, but I would like to find the pin strappings for the other possibilities I believe I could divide by 2,5,10,20,25,50? Apr 14, 1. Datadheet that, you can post your question and our members will help you out. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Switching lots of connections simultaneously.

Started by fastline Yesterday at 8: To participate you need to register. Is the Qd output the divide by 10 frequency? I have used decade counters using the “carry output” but I don’t have one hooked up right now.

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?

It appears, from looking at the datasheet, that indeed Q4 is a divide by 10 output, when the chip is configured for a decade counter. 74hc90 Well-Known Member Sep 1, I think I got it now. Space Varmint New Member Sep 3, Design b 74HC divoders. However, if you don’t use the outputs to drive a display, you can switch the divide-by-2 section with the divide-by-five section so that datasbeet divide-by-two section is last in each decade chain and then you WILL have a symmetrical output.

As mentioned, it takes a pretty special application of a counter such that you require a symmetrical Qd output. Did you look at the datasheet of the SN74HC?

Apr 14, 6. Oh, Texas Instruments say it is obsolete do not show its datasheet. Ask a Question Want to reply to this thread or ask your own question?

74HC Datasheet pdf – Dual decade ripple counter – Philips

You have to use a series counter to get full synchronous operation in all phases. Q0 would be Qa. And when you want to cascade them, the various stages will 74hc30 rippled even though within each stage it’s synchronous. If they’re ripple counters, they’ll ripple in cascade.

(PDF) 74HC390 Datasheet download

Apr 14, 5. BrownOut Banned Sep 1, Articles Top Articles Search resources. Thanks for that description. I intend to use the 74hc data sheet: