NXP USA Inc. HITAG® 2 PCF7936AA-3851-C-6 is a 125kHz RFID tag read/write memory component. Designed for robust identification and access control applications, this device utilizes a Phase-Locked Loop (PLL) based microcontroller for reliable RF communication. Its read/write capability enables dynamic data storage, making it suitable for security credentials, animal identification, and industrial tracking systems. The bulk packaging facilitates high-volume integration into various electronic systems. This component operates within the established 125kHz frequency band, ensuring compatibility with a wide range of existing RFID infrastructure.