DS1982 - Maxim Integrated

DS1982 1Kb Add-Only iButton

19-4891; Rev 8/09 SPECIAL FEATURES  1024 bits Electrically Programmable ReadOnly Memory (EPROM) communicates with the economy of one signal plus ground  EPROM partitioned into four 256-bit pages for randomly accessing packetized data  Each memory page can be permanently writeprotected to prevent tampering  Device is an “add only” memory where additional.

Features

 1024 bits Electrically Programmable ReadOnly Memory (EPROM) communicates with the economy of one signal plus ground
 EPROM partitioned into four 256-bit pages for randomly accessing packetized data
 Each memory page can be permanently writeprotected 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.