DS1982U

DS1982/5/6U UniqueWare iButtonTM www.dalsemi.com SPECIAL FEATURES 1024 bits, 16K bits or 64K bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground Unique, factory lasered and tested 64–bit registration number (8–bit family code, 36–bit serialization, 12–bit UniqueWare Identifier 5E7H, 8–bit CRC tester) assures absolute traceability because no two parts are alike EPROM partitioned into 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 Reduces control, address, data, power and programming signals to a single pin 8–bit family code specifies device communications requirements to reader Presence detector acknowledges when reader first applies voltage Reads over a wide voltage range of 2.8V to www.DataSheet4U.com 6.0V from –40°C to +85°C COMMON iButton FEATURES 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–Wire protocol ensure compatibility with iButton family Button Shape is self–aligning with cup– shaped probes Durable stainless steel case engraved with registr...