Maxim iButton
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DS1961S-F5 1kb Protected EEPROM iButton With SHA-1 Engine
The DS1961S combines 1024 bits of EEPROM, a 64-bit secret, an 8-byte register/control page with up to five user-read/write bytes, a 512-bit SHA-1 engine, and a fully featured 1-Wire interface in a rugged iButton. Data is transferred serially through...
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DS1990A-F5 iButton with Unique 64-bit Serial ID Number
The DS1990A serial number iButton® is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a groun...