As the title suggested, is length matching critical in routing crystal oscillator to their IC? I haven't found any documentation that you need to do it

 

Length of what?

 

Length of what?

Length of the route, there should be two routes, XI and XO, are those two necessary to be the same length?

 

As the title suggested, is length matching critical in routing crystal oscillator to their IC? I haven't found any documentation that you need to do it

Hi,

The leads have to be short, that's about it. If you extend them too far, the associated oscillator will not start. Matching isnt the main issue here. I've actually observed this phenomenon in both a CB radio and in a 10killowatt AC converter. Leads only 12 inches in length can cause this problem.

 

Hi,
The closer pins of oscillator to ic pins is better.

 

As the title suggested, is length matching critical in routing crystal oscillator to their IC? I haven't found any documentation that you need to do it

A crystal is one thing, while a crystal oscillator is quite another.

In the context you're using, where XO and XI are IC pins used to connect a crystal

(not a crystal oscillator) and its associated passive circuitry to the oscillator inputs of an IC, what matters is that the circuitry be connected as close as possible to XO and XI.

If you're using an external oscillator
http://uk.rs-online.com/web/p/crystal-oscillators/4785749/
with its output connected to XI, then the distance between the external oscillator's output and XI is less important.

 

Hi,

The leads have to be short, that's about it. If you extend them too far, the associated oscillator will not start. Matching isnt the main issue here. I've actually observed this phenomenon in both a CB radio and in a 10killowatt AC converter. Leads only 12 inches in length can cause this problem.

Thanks, a nice extra information for me

 

A crystal is one thing, while a crystal oscillator is quite another.

In the context you're using, where XO and XI are IC pins used to connect a crystal
View attachment 129357
(not a crystal oscillator) and its associated passive circuitry to the oscillator inputs of an IC, what matters is that the circuitry be connected as close as possible to XO and XI.

If you're using an external oscillator
http://uk.rs-online.com/web/p/crystal-oscillators/4785749/
with its output connected to XI, then the distance between the external oscillator's output and XI is less important.

Alright, I need to be more aware of the terms that I'm using.
Thanks for the info, it's really helpful to me