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SPECIAL FEATURES

■ 4096 bits of Read/Write Nonvolatile

??? Memory (DS1993)

■ 1024 bits of Read/Write Nonvolatile

??? Memory (DS1992)

■ 256-bit Scratchpad Ensures Integrity of Data

??? Transfer

■ Memory Partitioned into 256-bit Pages for

??? Packetizing Data

■ Data Integrity Assured with Strict

??? Read/Write Protocols

■ Operating Temperature Range from -40°C to

??? +70°C

■ Over 10 years of data retention

???

COMMON iButton FEATURES

■ Unique, Factory-Lasered and Tested 64-bit

??? Registration Number (8-bit Family Code +

??? 48-bit Serial Number + 8-bit CRC Tester)

??? Assures Absolute Traceability Because No

??? Two Parts are Alike

■ Multidrop Controller for MicroLAN

■ Digital Identification and Information by

??? Momentary Contact

■ Chip-Based Data Carrier Compactly Stores

??? Information

■ Data Can be Accessed While Affixed to

??? Object

■ Economically Communicates to Bus Master

??? with a Single Digital Signal at 16.3kbps

■ Standard 16mm Diameter and 1-Wire?

??? Protocol Ensure Compatibility with iButton?

??? Family

■ Button Shape is Self-Aligning with CupShaped Probes

■ Durable Stainless Steel Case Engraved with

??? Registration 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, 5th Ed., Rev. 1997-02-24;

??? Intrinsically Safe Apparatus, Approved under

??? Entity Concept for use in Class I, Division 1,

??? Group A, B, C, and D Locations

???