The HITAG product line is well known and established in the contactless identification market. Due to the open marketing strategy of NXP Semiconductors there are various manufacturers well established for both the transponders/cards as well as the read/write devices. All of them supporting HITAG 1， HITAG 2 and HITAG S transponder ICs. With the new HITAG μ family， this existing infrastructure is extended with the next generation of ICs being substantially smaller in mechanical size， lower in cost， offering more operation distance and speed， but still being operated with the same reader infrastructure and transponder manufacturing equipment. The protocol and command structure for HITAG μ is design to support Reader Talks First （RTF） operation， including anti-collision algorithm. Different memory sizes are offered and can be operated using exactly the same protocol.