The usual used chip for contactless IC card is Mifare 1 S50, Mifare 4 S70, Mifare 1 S50 Specification"
1.1k Byte EEPROM
2. Embedded antenna
3. Mifare 13.56MHz, ISO1443
4. Range of operation: A about 2.5 to 3.9
5. Diemsion: CR-80 Standard
6. Material: PVC
IC card, Magnetic card, RFID card