Help with sim300C serial?

[anh_risn]

I will use SIM300C for my project, I have read in the datasheet that VDD_EXT has max value = 3V and min 2.75V. I'm using 3.3V uC, can I directly connect the SIM300C's serial pins to the uC? because in the SIM300C datsheet mention that the serial pins have VDD_EXT+0.3V max logic input.
thanks

 

[ckshivaram]

Before posting search the forum... these are repeated many times.....

https://www.edaboard.com/threads/143236/
https://www.edaboard.com/threads/161501/

 

[anh_risn]

okay, I have read the two post as u mentioned before,
but I'm still didn't find that if it is okay to interface directly from my uC to the sim300c since the max input logic for sim300c is VDD_EXT+0.3V.
thanks