DS1985

DS1985 16-kbit Add-Only iButtonTM www.dalsemi.com SPECIAL FEATURES 16384 bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground § EPROM partitioned into sixty-four 256-bit www.DataSheet4U.com 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 DS1985 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 § § § § § § § § § § § § 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 16.3k bits per second Standard 16 mm diameter and 1-WireTM protocol ensure compatibility with iButton family Button shape is self-aligning with cupshaped probes Durable stainless steel case engraved with registration number withstands harsh environments Easily affixed with self-stick adhesive backing, latched by its flange, or l...