[time-nuts] Shera Controller - U7

[shalimr9 at gmail.com]

A 74AC74 in SO-14 package mounted dead bug style will make a handy /4 that is no bigger than most crystal oscillators.

If that's still too big, you can go with the TSSOP, but no coffee for you for a week prior to soldering that baby :)

Didier KO4BB

Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: "Kevin Staley" <kevin.staley at virgin.net>
Sender: time-nuts-bounces at febo.com
Date: Sun, 13 May 2012 17:27:20 
To: 'Discussion of precise time and frequency measurement'<time-nuts at febo.com>
Reply-To: kevin.staley at virgin.net,
	Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] Shera Controller - U7

Hi all
Thanks for the many responses.
It would seem that U7 is pretty rare.
I think I will be going with a 24 MHz "Can oscillator" and a separate 6MHz
source for the PIC either divided from the 24MHz oscillator or a separate
oscillator.

Thanks again
Kevin


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Chris Albertson
Sent: 13 May 2012 16:47
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Shera Controller - U7

On Sun, May 13, 2012 at 8:11 AM, J. L. Trantham <jltran at att.net> wrote:
> It is an 8 pin DIP, 24 MHz oscillator with an onboard divide output in 
> order to provide a dual output oscillator.  It is an ECS-300CX-240 and 
> DigiKey lists it as obsolete since 2009.  They say 'call'.

Sounds like a you could use a normal 24MHz TTL can oscillator and a dual
flip flop mounted "dead bug" style.

Chris Albertson
Redondo Beach, California

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