Product Summary

The DS1991L+F5 MultiKey iButton is a rugged read/write data carrier that acts as three separate electronic keys, offering 1,152 bits of secure, nonvolatile memory. Each key is 384 bits long with distinct 64-bit password and public ID fields. Accessories permit the DS1991L-F5 to be mounted on plastic key fobs, photo-ID badges, printed-circuit boards or any smooth surface of an object. Applications of the DS1991L+F5 include secure access control, debit tokens, work-in-progress tracking, electronic travelers and proprietary data.

Parametrics

DS1991L+F5 absolute maximum ratings: (1)Voltage on any Pin Relative to Ground: -0.5V to +7.0V; (2)Operating Temperature: -40℃ to +70℃; (3)Storage Temperature: -40℃ to +70℃.

Features

DS1991L+F5 features: (1)1,152-bit secure read/write, nonvolatile memory; (2)Secure memory cannot be deciphered without matching 64-bit password; (3)Memory is partitioned into 3 blocks of 384 bits each; (4)64-bit password and ID fields for each memory block; (5)512-bit scratchpad ensures data transfer integrity; (6)Operating temperature range: -40℃ to +70℃; (7)Over 10 years of data retention.

Diagrams

DS1991L+F5 diagram

DS1904L-F5
DS1904L-F5

Maxim Integrated Products

iButtons

Data Sheet

Negotiable 
DS1904L-F5#
DS1904L-F5#

Maxim Integrated Products

iButtons RTC iButton

Data Sheet

0-1: $6.30
1-25: $4.19
25-50: $3.10
50-100: $3.01
DS1904L-F5+
DS1904L-F5+

Maxim Integrated Products

iButtons

Data Sheet

Negotiable 
DS1920-F5
DS1920-F5

Maxim Integrated Products

iButtons

Data Sheet

Negotiable 
DS1920-F5+
DS1920-F5+

Maxim Integrated Products

iButtons Temperature iButton

Data Sheet

0-1: $7.62
1-25: $5.07
25-50: $3.75
50-100: $3.65
DS1921G-F5
DS1921G-F5

Maxim Integrated Products

iButtons

Data Sheet

Negotiable