ATMEL TK5530 handbook(1)(1)
Datasheet
The TK5530 is a complete transponder used for car immobilization, access control, alarm systems, and other identification systems. It consists of a plastic cube with an e5530 IDIC chip and a tuned circuit antenna. The e5530 chip stores 128 bits of read-only data, which is transmitted to the base station via an RF field. The product has anti-counterfeiting features.