Crystal or DIP Crystal Oscillator would you choose?

In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.

 

[John Larkin]

On 25 Aug 2005 19:59:46 -0700, mingyan_chow@yahoo.com.hk wrote:

In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.

The packaged oscillator is much more likely to oscillate, and *far*
more likely to oscillate on frequency.

John

 

[Tim Wescott]

John Larkin wrote:

On 25 Aug 2005 19:59:46 -0700, mingyan_chow@yahoo.com.hk wrote:


In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.


The packaged oscillator is much more likely to oscillate, and *far*
more likely to oscillate on frequency.

John

And over temperature, with less work. The cost effective choice depends

on whether you have a bunch of pieces to build, or a few.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

 

[Spehro Pefhany]

On Thu, 25 Aug 2005 20:43:42 -0700, the renowned Tim Wescott
<tim@seemywebsite.com> wrote:

John Larkin wrote:

On 25 Aug 2005 19:59:46 -0700, mingyan_chow@yahoo.com.hk wrote:


In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.


The packaged oscillator is much more likely to oscillate, and *far*
more likely to oscillate on frequency.

John

And over temperature, with less work. The cost effective choice depends
on whether you have a bunch of pieces to build, or a few.

And if you don't care how much juice it sucks.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Jonathan Kirwan]

On Fri, 26 Aug 2005 01:12:30 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

And over temperature, with less work. The cost effective choice depends
on whether you have a bunch of pieces to build, or a few.

And if you don't care how much juice it sucks.

Yes. I had quite a wide selection of units that pulled some tens of
mW, but trying to sort through and find a few with something much more
reasonable was difficult -- as in, very frustrating.

In the meantime, there is the HA7210 that can help for lower power.
Also, I've found that where you already have an external oscillator
available, in some cases you can drive the OUTPUT side of the two-pin
xtal class-A oscillators and cause the internal inverter to find a
stable, quiescent state where it doesn't oscillate at all and thus
draw power. That alone can cut power consumption in half over what
would happen when you try and drive the INPUT side where the internal
inverter just ticks away and sucks power. Those inverters can be
surprising in what they suck down when they invert, it seems. Of
course, you have to have a case where the output side does in some way
drive the internal chip. Some of the PICs are like that, for example,
and drive quite well from the output pin at substantially lower power.

Jon

 

[bruce varley]

Only ever used a DIP oscillator once, performance is impressive. Associated
clock keeps in track for years at a time.
<mingyan_chow@yahoo.com.hk> wrote in message
news:1125025186.452833.146200@f14g2000cwb.googlegroups.com...

In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.

 

[Joerg]

Hello Mingyan,

In comparsion with performance, you would choose either HC49U Crystal
with MC4060 or Factory made crystal oscillator purely in performance.
Of course price is another issue.

In cost critical cases I always design with individual crystals. If you
meant the CD4060 this already has an oscillator provision in there.

Regards, Joerg

http://www.analogconsultants.com