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Subject: Re: Can you help me? (Oscillator Crystal with 74HC4060)

Date: 08/19/03 at 9:11 AM
Posted by: Ned Stevens
E-mail: k7elp[AT55]xmission.com (replace [AT55] with @ to reply)
Message Posted:

In Reply to: Can you help me? (Oscillator Crystal with 74HC4060) posted by Cao Tung Lam on 08/17/03 at 11:59 PM:

Cao,
Since the 74HC4060 is a 14 stage binary counter I would multiply 50Hz by 2 to the 14th power. 2 to the 14 power is 16,384. This times 50hz is=819.2Khz. Or for that matter decide which output of the 4060 you are going to use and take it to 2 to the nth power. If you want a stable frequency like for a clock you may have difficulty getting a crystal at 819.2 Khz. I might suggest you use a 2.4576Mhz crystal. Take the output from pin 2 which will give you 300Hz.
(2.4576/8192)Then use another divider to divide the 300hz by 5 to get 60 hz or by 6 to get 50hz.
Ned


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