The secret life of the SIM cards. Слайды. https://speakerd.s3.amazonaws.com/presentations/3f6019d0e0ff013010f03ed23fede438/SIM_Toolkit.pdf
Табличка оттуда:
Chip Field Description
Generic Description 64K JavaCard 2.1.1 WIB1.3 USIM
Platform Atmel AT90SC25672RU
CPU Architecture 8-bit AVR
Technology 0.15uM CMOS
ROM 256KB ROM Program Memory
Non-volatile memory 72 KB EEPROM
RAM 6 KB
Internal operating frequency Between 20 & 30 MHz
Endurance Typically 500 000 write/erase cycles