@DPALLAS SEMICONDUCTOR DS1982/5/6U DS1982/5/6U UniqueWare! iButton SPECIAL FEATURES # 1024 bits, 16K bits or 64K bits Electrically Program- mable 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, 36bit serialization, 12-bit UniqueWare Identifier 5E7H, 8bit CRC tester) as- sures absolute traceability because no two parts are alike. EPROM partitioned into 256bit pages for randomly accessing packetized data records * Each memory page can be permanently write-pro- tected 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 program- ming 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 6.0V from 40C to +86C iButton DESCRIPTION UniqueWare iButtons are factory programmed versions of the DS1982 (1024 bit), the DS1985 (16K bit) and the DS1986 (64K bit) AddOnly iButtons, respectively. They differ fram the regular devices in their custom ROM family codes (see Ordering Information) and the UniqueWare Identifier 5E7 in place of the upper 12 bits of the standard serialization field. For technical details on the devices please refer to the DS1982,D91985 and DS1986 data sheets. UniqueWare AddOnly iButtons are only available pre- programmed with customer-specific and writepro- tected data. UniqueWare data fills at feast one but no COMMON iButton FEATURES Multidrop controller for MicroLAN # Digital identification and information by momentary contact Chip~based data carrier compactly stores informa- tion 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 1Wire protocol en- sure compatibility with iButton family Button Shape is selfaligning with cup-shaped probes Durable stainless steel case engraved with registra- tion number withstands harsh environments Easily affixed with self-stick adhesive backing. latched by its flange, or locked with a ring pressed onto its rim Presence detector acknowledges when reader first applies voltage * Meets UL#913 (4th edit.}; intrinsically Safe Appara- tus, Approved under Entity Concept for use in Class |, Division 1, Group A, B, C and D Locations (applica- tion pending) more than the first four pages of a device, depending on the length of the customersupplied data. This leaves up to three (DS1982U), 63 (DS1985U) or 255 {DS1986U) memory pages available for programming in the application. For more details on UniqueWare and how to set up data files, please refer to the UniqueWare Project Setup Manual, available as Application Note 99 from Dallas Semiconductor. The UniqueWare Project Setup Soft- ware is available from the Dallas Semiconductor FTP Site at ftp://ftp.daisemi.com/pub/auto_id, unwsetup.exe. 108