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Author Topic: Oscillator with 4060 counter  (Read 5709 times)

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Offline michaelymTopic starter

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Oscillator with 4060 counter
« on: June 24, 2013, 06:25:03 am »
Hi,

I first built this circuit (Attached) with HEF4060BP and it worked perfectly.
When I built it with a SN74HC4060 it doesn't work and I cannot figure out why.

Michael
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duskglow

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Re: Oscillator with 4060 counter
« Reply #1 on: June 24, 2013, 06:39:33 am »
What is your supply voltage?
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Offline michaelymTopic starter

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Re: Oscillator with 4060 counter
« Reply #2 on: June 24, 2013, 07:06:45 am »
3.6-4.2V
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duskglow

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Re: Oscillator with 4060 counter
« Reply #3 on: June 24, 2013, 07:15:01 am »
I would check the specifications of each.  A cursory look tells me they have slightly different characteristics and the HC might react differently to that voltage then the HEF.
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Offline michaelymTopic starter

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Re: Oscillator with 4060 counter
« Reply #4 on: June 24, 2013, 08:07:27 am »
Weird, I just tried it with a 4MHz oscillator and it works.
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Offline thesgoat

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Re: Oscillator with 4060 counter
« Reply #5 on: June 24, 2013, 08:51:40 am »
I had exactly the same issue with a 32kHz crystal, ended up making a separate oscillator out of a spare inverter.
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Offline Alana

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Re: Oscillator with 4060 counter
« Reply #6 on: June 24, 2013, 09:22:39 am »
Tried wihout resistors?
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Offline michaelymTopic starter

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Re: Oscillator with 4060 counter
« Reply #7 on: June 24, 2013, 09:32:22 am »
Yes, I tried it without resistors and also with lower value resistors 2.2k & 100k.
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Offline Alana

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Re: Oscillator with 4060 counter
« Reply #8 on: June 24, 2013, 11:50:28 am »
Is there any reason not to use 4000b series chip instead of 74hc series? 4000b chip works and with same Vcc  it should be compatible with rest of circuit if you use 74HC chips there.
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Offline michaelymTopic starter

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Re: Oscillator with 4060 counter
« Reply #9 on: June 24, 2013, 03:07:57 pm »
I tried it with CD74HC and it works.

If I can figure out why it's not working with the SN74HC, maybe I can find a solution that only involves replacing passives, and avoid throwing out all the chips.
« Last Edit: June 25, 2013, 11:51:54 am by michaelym »
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Offline michaelymTopic starter

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Re: Oscillator with 4060 counter
« Reply #10 on: June 25, 2013, 11:52:47 am »
I mixed up the part numbers in the last reply, now it's correct.
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