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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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Single transition mode to Gnd Pin Please provide a schematic of what you have beside a schematic of the circuit in the datasheet.

To participate you need to register. RS k Pin 4. I was expecting nothing on the output except maybe momentarily ,until I had started the count and it had completed.

Not Connected Pin 5. Just saying hello Started by MichaelaJoy Yesterday at 6: I think I am reading the logic and timing tables correctly and that the k, k and 50 pic is all in range? Articles Top Articles Search resources. Welcome to our site!


HCF (STMicroelectronics) – Programmable Timer, Logic

Media New media New comments Search media. Frequency Select B to Gnd for Pin The timer is working normally. If pin 6 is high then the timer is always reset.

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For a better experience, please enable JavaScript in your browser before proceeding. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Output to LED through 1k Pin 9. Auto Reset to Gnd Pin 6. This is how I am using the IC. Your reset input pin 6 is shown not connected to anything, it will float in this situation causing random resets due to noise.

HCF STMicroelectronics, HCF Datasheet

Hi dr pepper, I see what you mean mate but just tried and still same results. What is my problem here? CT 50pF Pin 3. 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. Then you will see what is wired wrong.


Replacing a 4 pin leaded inductor with a 2 pin Hcf44541 by gkmaia Yesterday at By continuing to use this site, you are consenting to our use of cookies. If I put the manual reset line to Gnd and power up I get a neg on datashet output.

Potentiometer Questions Started by norbss Yesterday at The datasheet is puzzling me to say the least. RTC k Pin 2.

(PDF) HCF4541 Datasheet download

Can anyone suggest where I am going wrong? Forums New posts Search forums. You must log in or register to reply here.

Not Connected Pin Started by fastline Yesterday at 8: Click here to register now.