ST19WR02 is a dual contactless smartcard MCU based on ISO 14443 type B with 2 Kbytes EEPROM, integrated with security firewall, DES accelerator, 2 8-bit timers, ISO 3309 CRC calculation block, FIPS 140-2 compliant random number generator, powered by 2.7 V to 5.5 V, external clock frequency up to 10 MHz