CD Datasheet, CD Stage Frequency Divider Datasheet, buy CD Data sheet acquired from Harris Semiconductor. SCHS Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. IMPORTANT NOTICE. Texas Instruments. all relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes.

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Another solution is a I have a peculiar problem involving the CD frequency divider of which I use two in a redundant configuration as shown in my schematic snippet below:.

Electro Tech is an online community with overmembers who enjoy talking about datasheeg building electronic circuits, projects and gadgets. That will cause a significant current to flow through the IC and also cause its temperature to rise, as you measured.

That’s cheap and low power compared to a Rubidium oscillator. I have several pics and a programmer and am somewhat aware of it’s possibilities in this case. Therefore you are effectively trying to cause a short-circuit at pin 7 of the IC, limited mainly by the IC’s output driver current capability.

CD4521 24-Stage Frequency Divider IC

Media New media New comments Search media. The MCU is still an option but it would need a crystal so the counter might be more convenient. Sign up using Facebook. By continuing to use this site, you are consenting to our use of cookies. If you are lucky, any internal damage has been confined to the driver for pin 7, which you aren’t using.


So, sure, if someone would like to post a link for a tutorial or sample generic code of their favorite one for this C language please. I looked it up on Mouser, but their datasheet is dated many years ago.

Click here to register now. Not everyone likes or wants to use microcontrollers and i understand this, so another solution is to use an LM and a capacitor and a few resistors to make a cd452 oscillator. That is fairly inaccurate in the short term, but is satasheet so that the long-term drift is zero, as many electric clocks use the mains frequency as a reference.

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CD Frequency Divider – CD Stage Frequency Divider IC – Robomart

Slightly clearer internal logic diagrams of dattasheet IC are available in the datasheets from: To create a one second time base, I went looking for this: How do I know I am getting the newest, improved version of the ? Forums New posts Search forums. I’ve edited the original datxsheet from the TI datasheet that you linked, to remove extraneous parts.

Is this a different ? As a beginner, reasonable accuracy is good enough for now. To participate you need to register. It is normal to leave unused outputs unconnected, not connect them to Gnd. No, it’s 2Hz only, to get 1Hz you need another divider. It depends on how much accuracy you really need.


Be only a matter, I should think, of adjusting the count in the code. With a 12F and a Datasyeet watch crystal you could have a pretty accurate 1Hz timebase. One Second Time Base.

CD Datasheet, PDF – Datasheet Search Engine

After a bit of a learning curve, I got it to alternately blink two leds and was so happy I let it run for an hour. Potentiometer Questions Started by norbss Yesterday at It may also have damaged one or both of these ICs. If you use the internal RC oscillator, you dont even need a crystal or external oscillator. If you have an 8 pin PIC laying around you’re all set to go Since the logic Low driven on pin 7 is not exactly zero volts, there will be an extra unplanned darasheet from pin datashete to Gnd.

Your information is very interesting. No problem if you dont really need this. Price depends on stability, and can be as good as 0. The Maxim part is expensive because it is Temperature Compensated, so it has circuitry that is probably individually calibrated at several temperatures.

I do have a good scope once I learn to use it.

It’s a very simple circuit datashest is not too sensitive to voltage variations, and accuracy can be adjusted to very very close to perfect if you have a frequency counter available. This is where my inexpierence shows.

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