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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Can anyone suggest where I am going wrong? Then you will see what is wired wrong.

Frequency Select B to Gnd for Pin Please provide a schematic of what you have beside a schematic of the circuit in the hcf5441. If pin 6 is high then the timer is always reset.

(PDF) HCF4541 Datasheet download

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Welcome to our site! This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Your reset input pin 6 is shown not connected to anything, it will float in this situation causing random resets due to noise. You must log in or register to reply here. Just saying hello Started by MichaelaJoy Yesterday at 6: Single transition mode to Gnd Pin RS k Pin 4.

To participate you need to register. This is how I am using the IC.

Problem understanding HCF4541 Programmable Timer Datasheet

Output to LED through 1k Pin 9. The timer is working normally. The datasheet is puzzling me to say the least. Click here to register now. What is my problem here? CT 50pF Pin 3. Started by fastline Yesterday at 8: I was expecting nothing on the output except maybe momentarily ,until I had started the count and it had completed.

I think I am reading the logic and timing tables correctly and that the k, k and 50 pic is all in range? Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Hi to all, I am trying to build a long interval timer using the HCF IC and am not hvf4541 the results I expected, but I am not certain that I am reading the datasheet correctly.

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HCF Datasheet, PDF – Alldatasheet

If I put the manual reset line to Gnd and power up I get a neg on the output. RTC k Pin 2.

Hi dr pepper, I see what you mean mate but just tried and still same results. For a better experience, please enable JavaScript in your browser before proceeding. Not Connected Pin Forums New posts Search forums. Not Connected Pin 5. Articles Top Articles Search resources. Potentiometer Questions Started by norbss Yesterday at Auto Reset to Gnd Pin 6.