Problem with MAX232 and it's capacitors value

[amila133]

Hello,
I have seen MAX232 capacitor's different values in applications like 10uf, 1uf, .1 uf. I want to know how to select the accurate capacitor value for our application.

Can anyone clarify this for me please.

Thank You

 

[IanP]

Most Max232 variations use 1µF or 0.1µF caps ..
For example, MAX232 => 1µF, MAX232A => 0.1µF, MAX202 => 0.1µF ..
See attached picture and MAX-xxx data sheet:
**broken link removed**

10µF caps were used in the very early days of the MAX232 carrier and are not recommended any more ..

Rgds,
IanP

 

[amila133]

Thank you very much for your reply. Because I used 10uf with MAX232. My application is send sms using pic and phone. But it didn't work. Without MAX232 it worked.
regards,
Amila