Ibutton ISO1990A-F5, ISO1991L-F5 Compatible Dallas TM keys, Touch memory Wristbands,

Dec. 13, 2012 - PRLog -- "1990A-F5: * Upgrade of DS1990 allows multiple serial number * iButtons to reside on a common bus * Unique 48bit serial number * Low cost electronic key for access control * 8bit CRC for checking data integrity * Can be read in less than 5ms * Operating temperature range of -40C to +85C 1991L-F5: * 1152bit secure read/write, nonvolatile memory * Secure memory cannot be deciphered without matching 64bit password * Memory is partitioned into 3 blocks of 384bits each * 64bit password and ID fields for each memory block * 512bit scratchpad ensures data transfer integrity * Operating temperature range -40C to +70C * Over 10 years of data retention Ibutton Size: dia17mm × 6mm, Weight: 3.3g TM key size: Handle L40×W15mm, weight 4.5g Wristband size: band dia 65mm, stretchable Application: Access control / Guard Tour system / security patrol / sauna door locks / electronic door locks " "1990A-F5: * Upgrade of DS1990 allows multiple serial number * iButtons to reside on a common bus * Unique 48bit serial number * Low cost electronic key for access control * 8bit CRC for checking data integrity * Can be read in less than 5ms * Operating temperature range of -40C to +85C 1991L-F5: * 1152bit secure read/write, nonvolatile memory * Secure memory cannot be deciphered without matching 64bit password * Memory is partitioned into 3 blocks of 384bits each * 64bit password and ID fields for each memory block * 512bit scratchpad ensures data transfer integrity * Operating temperature range -40C to +70C * Over 10 years of data retention Ibutton Size: dia17mm × 6mm, Weight: 3.3g TM key size: Handle L40×W15mm, weight 4.5g Wristband size: band dia 65mm, stretchable Application: Access control / Guard Tour system / security patrol / sauna door locks / electronic door locks "