DS1982 - 1 KBIT ADD-ONLY IBUTTON BY DALLAS SEMICONDUCTOR 

DS1982 - 1 kbit Add-Only iButton by Dallas Semiconductor

Product Code: DS1982 Price: Check Latest This is a flexibly programmable database for storing information about a product, piece of equipment, or person or for one-way counting down. Like all iButtons, the DS1982 has a unique serial number for associating a digital address with an object or person and a 1-Wire interface. The port interface provides both the physical link and handles the communication protocols that enable the processor to access iButton resources with simple commands. The DS1982's particular feature is 1kbit user-programmable EPROM. The EPROM may be programmed multiple times in incremental add-ons that change individual bits from 1 to 0; alternatively, the entire 1kbit of memory can be programmed at once and then write-protected. This count-down type of memory usage is useful for debit tokens. By means of iButton accessories, the DS1982 can be mounted to make read/write access convenient to the application. Key Features 1024-bits EEPROM EPROM partitioned into four 256-bit pages Each page can be permanently write-protected Add-only memory allows additions to EPROM without disturbing existing data Control, address, data, and power signals reduced to a single data pin 2.8V to 6.0V range -40°C to +85°C range >10 years data retention iButton and 1-Wire are registered trademarks of Dallas Semiconductor Corporation.