DS1961S www.maxim-ic.com 1kb Protected EEPROM iBu.
Dallas Semiconducotr
DS1961S - 1kb Protected EEPROM iButton With SHA-1 Engine
DS1961S www.maxim-ic.com 1kb Protected EEPROM iButton With SHA-1 Engine SPECIAL FEATURES § 1128 Bits of 5V EEPROM Memory Partitioned into Four Pages.