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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Q0 would be Qa. Space Varmint New Member Sep 1, Apr 14, 9. Well those pins are not on the pinout. Parallel load and reset are asynchronous operations. But if the OP is only interested in clocking a subsequent stage, symmetrical output isn’t required. Someone must have produced a table, but extensive Googling fails to find it! Welcome to our site!
74HC390 – Dual Decade Ripple Counter
So that’s the purpose of the “other” mode. 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. Hey, but thanks for reply. Design b 74HC divoders. Potentiometer Questions Started by norbss Yesterday at I know the pin strappings for divide by 4 example 14 to 215 to 32,4,8,12,14 to Ground1 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?
And when you want to cascade them, the various stages will be rippled even though within each stage it’s synchronous.
Media New media New comments Search media. But you’ll still potentially have a non-symmetrical Qd output 7hc390 it’s not a straight binary counter. 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?
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 the divide-by-two section is last in each decade chain and then you WILL have a symmetrical output. Similar Threads Parallel Pin Connections.
Articles Top Articles Search resources. That wasn’t a billed response was it? Apr 14, 1. Using a Qd output as the gate input for a frequency counter would be a bad idea! Started by fastline Yesterday at 8: You’ll need to choose a username for the site, which only take a couple of moments here.
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, 5. Did you look at the datasheet of the SN74HC? Mikebits Well-Known Member Sep 1, BrownOut Banned Sep 1, To participate you need to register. Apr 14, 2.
Stupid question / Decade Counter | Electronics Forum (Circuits, Projects and Microcontrollers)
Ask a Question Want to reply to this thread or ask your own question? After that, you can post your question and our members will help you out. As mentioned, it takes a pretty special application of a counter such that you require a symmetrical Qd output. I want to experiment with 74HC chip.
74HC datasheet, Pinout ,application circuits 74HC/HCT Dual Decade Ripple Counter
datashete You have to use a series counter to get full synchronous operation in all phases. If I remember correctly it is an asynchronous signal. Forums New posts Search forums. Hello First question here.
It appears, from looking at the datasheet, that indeed Q4 74hc3390 a divide by 10 output, when the dtasheet is configured for a decade counter. Oh, Texas Instruments say it is obsolete do not show its datasheet. I intend to use the 74hc data sheet: You must log in or sign up to reply here. For instance, the synchronous decade counter is synchronous in its counting only. You do have to be careful with counters. I have used decade counters using the “carry output” but I don’t have one hooked up right now.