I need RFID data sheets?

google for RFID and you will find a lot of sources.

BTW
www.microchip.com
www.melexis.com
www.sokymat.com
www.ti.com // the RFID section is hard to find there

and so on ...

depends also on your need's, which frequency, reading range, needed memory, read only / read write, encrypted / blank

so if you specify your needs either in google or here in the forum you have a higher chance to get more help(answers).

Mr_Programmer