ST25TN are high quality NFC Chips produced by STMicroelectronics. They belong to the NFC Forum Type 2 category and comply with the ISO 14443-A standard, with a 7-byte UID (14 hexadecimal characters). They support NDEF messages, kill function, and TruST25 digital signature for authenticity. Among the main advantages compared to other types of chips: data retention period of up to 40 years and resistance to 100,000 read/write cycles.