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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(PDF) HCF4541 Datasheet download
RTC k Pin 2. CT 50pF Pin 3. RS k Pin 4.
Not Eatasheet Pin 5. Auto Reset to Gnd Pin 6. Output to LED through 1k Pin 9. Single transition mode to Gnd Pin Not Connected Pin Frequency Select B to Gnd for Pin If I put the manual reset line to Gnd and power up I get a neg on the output. I was expecting nothing on the output except maybe momentarily ,until I had started hcf4451 count and it had completed.
HCF datasheet & applicatoin notes – Datasheet Archive
The datasheet is puzzling me to say the least. Can anyone suggest where I am going wrong? I think I am reading the logic and timing tables correctly and that the k, k and 50 pic is all in range?
What is my problem here? Please provide a schematic datashert what you have beside a schematic of the circuit in the datasheet. Then you will see what is wired wrong. Your reset input pin 6 is shown not connected to anything, it will float in this situation causing random resets due to noise.
Hi dr pepper, I see what you mean mate but just tried and still same results. The timer is working normally.
HCF (STMicroelectronics) – Programmable Timer, Logic
If pin 6 is high then the timer is always reset. You must log in or register to reply here.