You could use a 4060. It is a CMOS 14stage binary counter with a built-in oscillator.Originally posted by Sumner@Mar 10 2005, 08:55 PM
I'm looking for a simple, very low power< 10uA, yet reliable circuit timer that will output a logic level after a period of about 10-20 minutes. I prefer not to use a 555 timer due to current restraints. Any ideas?
Originally posted by mozikluv@Mar 12 2005, 11:05 AM
have not yet thoroughly studied the datasheet, if i were to use the 4060 as a timing device where would i put the timing components, is it between pin 10 & 11?
Originally posted by pebe@Mar 10 2005, 06:56 PM
You could use a 4060. It is a CMOS 14stage binary counter with a built-in oscillator.
The 4538 is a 'one-shot' where the delay is decided by the time constant of a singlw R and C. Hitherto, a TC of 1200 secs would have been unattainable but now that very large caps - of the order of Farads - are available, it would seem possible, though I have no experience in using them here.Originally posted by Sumner@Mar 12 2005, 05:34 PM
Thanks for the suggestion.
Since the application is going to be used around radio receivers I would prefer not to use anything with an oscillator thus preventing any low level signals in the radios. I was hoping for an RC design with a simple logic type device. I've seen one that uses a 4538B but I'm sure there's a better option out there. Any other suggestions?
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