AT88RF256-12

Features 125 kHz RFID Chip for Cards and Tags 256 Read/Write EEPROM Bits, Divided into Eight Pages of 32 Bits Password and Write Lock Protection Programmable Send and Receive Protocols Support for Multiple Tags (Anti-collision) Integrated 150 pF Tuning Capacitor ID Length Programmable from 4 - 19 Bytes Optional Start and Stop Bits Bit Reception Rate of 32 to 4096 Clocks/Bit Bit Transmission Rate of 16 to 1024 Clocks/Bit Unique Serial Number -40° to +85°C Temperature Range Description The AT88RF256 is an RFID (radio frequency identification) chip designed to work on the industry-standard carrier frequency of 125 kHz. Applications include access control, asset identification, industrial tagging, animal identification and other applications where modest security capabilities are necessary. Security features include locking of sensitive information to prevent tampering, optional passwords to prevent unauthorized access and unique serial numbers locked into the chip by Atmel. (continued) 125 kHz RFID Transponder Chip AT88RF256-12 Preliminary Block Diagram EEPROM VSS VDD Typical Operating Configuration External Coil L2 RF Power AT88RF256-12 Data L1 Typical Coil Inductance @125 kHz is ~10.1 mH Rev. 1684A–07/00 1 Since the chip includes an internal tuning capacitor, only the addition of an external coil antenna is required to form the complete tag or card. The chip includes an array of read/write EEPROM, of which 224 bits are available for user defin...