DS1986

DS1986 64-kbits Add-Only iButtonTM www.iButton.com SPECIAL FEATURES 65536 bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground § Overdrive mode boosts communication speed to 142 kbits per second www.DataSheet4U.com § EPROM partitioned into two hundred and 56 256-bit pages for randomly accessing packetized data records § Each memory page can be permanently write-protected to prevent tampering § Device is an “add only” memory where additional data can be programmed into EPROM without disturbing existing data § Architecture allows software to patch data by superseding an old page in favor of a newly programmed page § Reduces control, address, data, power, and programming signals to a single data pin § 8-bit family code specifies DS1986 communications requirements to reader § Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C; programs at 11.5V to 12.0V 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 Economically communicates to bus master with a single digital signal at 16.3 kbits per second Standard 16 mm di...