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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HCF STMicroelectronics, HCF Datasheet

Output to LED through 1k Pin 9. What is my problem here? RTC k Pin 2.

Potentiometer Questions Started by norbss Yesterday at Hi to all, I am trying to build a long interval timer using the HCF Daatasheet and am not getting the results I expected, but I am not certain that I am reading the datasheet correctly.


RS k Pin 4. Please provide a schematic of what you have beside a schematic of the circuit in the datasheet.

(PDF) HCF4541 Datasheet download

Your reset input pin 6 is shown not connected to anything, it will float in this situation causing random resets due to noise.

I was expecting nothing on the output except maybe momentarily ,until I had started the count and it had completed.

Frequency Select B to Gnd for Pin Datashdet dr pepper, I see what you mean mate but just tried and still same results. Can anyone suggest where I am going wrong? If I put the manual reset line to Gnd and power up I get a neg on the output. If pin 6 is high then the timer is always reset.

Problem understanding HCF4541 Programmable Timer Datasheet

Then you will see what is wired wrong. Auto Reset to Gnd Pin 6. Click here to register now.

Started by fastline Yesterday at 8: The datasheet is puzzling me to say the least. By continuing to use this site, you are consenting to our use of cookies.


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Single transition mode to Gnd Pin I think I am reading the logic and timing tables correctly and that the k, k and 50 pic is all in range? To participate you need to register.

CT 50pF Pin 3. The timer is working normally. Not Connected Pin 5. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Just saying hvf4541 Started by Hcf541 Yesterday at 6: This is how I am using the IC.

Media New media New comments Search media. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Welcome to our site! You must log in or register to reply here. Not Connected Pin For a better experience, please enable JavaScript in your browser before proceeding.