Intelligent 221-Bit EEPROM Counter For 20000 Units With security Logic And High security Authentication(智能21位EEPROM计数可计20000单元,带安全逻辑,高级安全认证)) 智能221位EEPROM的柜台,20000安全逻辑,高安全性认证(智能21位EEPROM的计数器(可20000单元,带安全逻辑,高级安全认证)单位 Intelligent 221Bit EEPROM Counter security & Chip Card ICs From old datasheet system