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HCF Programmable Timer. 16 STAGE BINARY COUNTER LOW SYMMETR. OUTPUT RESISTANCE, TYPICALLY at VDD = 15V OSCILLATOR. HCF Datasheet, HCF PDF, HCF Data sheet, HCF manual, HCF pdf, HCF, datenblatt, Electronics HCF, alldatasheet, free. Part Number: HCF, Maunfacturer: ST Microelectronics, Part Family: HC, File type: PDF, Document: Datasheet – semiconductor.

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By continuing to use this site, you are consenting to our use of cookies. This is how I am using the IC.

Started by fastline Yesterday at 8: RS k Pin 4. Click here to register now. Not Connected Pin I was expecting nothing on the output except maybe momentarily ,until I had started the count and it had completed. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at For a better chf4541, please enable JavaScript in your browser before proceeding.

You must log in or register to reply here. CT 50pF Pin 3. Hi dr pepper, I see what you mean mate but just tried and still same results. Output to LED through 1k Pin 9. What is my problem here?


If I put the manual reset line to Gnd and power up I get a neg on the output.

HCF Datasheet pdf – PROGRAMMABLE TIMER – ST Microelectronics

Not Connected Pin 5. I think I am reading the logic and timing tables correctly and that the k, k and 50 pic gcf4541 all in range?

Auto Reset to Gnd Pin 6. Potentiometer Questions Started by norbss Yesterday at If pin 6 is high then the timer is always reset.

Welcome to our site! Can anyone suggest where I am going wrong?

Articles Top Articles Search resources. RTC k Pin 2. Forums New posts Search forums. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Hi to all, I am trying to build a long interval timer using the HCF IC and am not getting the results I expected, but I am not certain that I am reading the datasheet correctly.

To participate you need to register. The datasheet is puzzling me to say the least. Your reset input pin 6 is shown not connected to anything, it will float in this situation causing random resets due to noise. Media New media New comments Search media.


Problem understanding HCF4541 Programmable Timer Datasheet

Frequency Select B to Gnd for Pin Just saying hello Started by MichaelaJoy Yesterday at 6: Single transition mode to Gnd Pin Please provide a schematic of what you have beside a schematic of the circuit in the datasheet. The timer is working normally.

Then you will see what is datsaheet wrong. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.


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