SPECIAL FEATURES

256-bit Electrically Erasable Programmable
Read Only Memory (EEPROM)
communicates with the economy of one
signal plus ground

EEPROM organized as one 256-bit page

64-bit one-time programmable application
register is automatically write-protected after
programming

Reduces control, address, data, power, and
programming signals to a single data pin

8-bit family code specifies DS1971
communications requirements to reader

Reads and writes over a wide voltage range
of 2.8V to 6.0V from -40°C to +85°C
COMMON iButton FEATURES

Unique, factory-lasered and tested 64-bit
registration number (8-bit family code + 48-
bit serial number + 8-bit CRC tester) assures
absolute traceability because no two parts are
alike

Multidrop controller for MicroLAN

Digital identification and information by
momentary contact

Chip-based data carrier compactly stores
information

Data can be accessed while affixed to object