MAX232..need help

[cwt]

Hi, i have a few question to ask.

:?:

Is the input and output of MAX232 inverse 180 degrees? :?

How does the MAX232 step down serial voltage level?
How does it step up TTL voltage level?
Can anyone tell me how does those operation works?

Thanks!

 

[Sebi]

MAX232 contain in-built charge-pump supply, it convert the 5V to + and-10V DC for RS232 side. Yes, the MAX232 also work as inverter.