[time-nuts] Divide by 3

Charles Steinmetz csteinmetz at yandex.com
Thu Jul 7 17:55:53 EDT 2016

Nick wrote:

 >> Charles wrote:
 >> What specific chips did you use?
 > Nick wrote:
 > MC74VHC1G86
 > 74HC74D

Good to know, thanks.  Just FYI, you may want to look into the NC7SZ86 
(and other NC7SZ "TinyLogic" series parts).  The NC7SZ86 is 
pin-compatible with the 74VHC1G part, with several added advantages:

1).  Output drive current is +/- 24mA rather than only 8mA.  (This 
doesn't matter for the divide-by-three circuit, but in my book sturdy 
outputs are always preferred.)

2).  It is a bit faster.

3).  Speed doesn't drop off as much on lower-voltage supplies.

4).  The NC7SZ series incorporates ground-bounce reduction for lower EMI 
and noise.

Best regards,


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