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iButton 1K位/4K位存储器

产品详情

主要特征

应用/用途

Parametric specs for iButton Products
Technology iButton
End Equipment Asset Management
Memory Type NV SRAM
Memory Size 1K bits
Unique Ware No
Real Time Clock No
Budgetary
Price (See Notes)
6.94
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参量

Parametric specs for iButton Products
Technology iButton
End Equipment Asset Management
Memory Type NV SRAM
Memory Size 1K bits
Unique Ware No
Real Time Clock No
Budgetary
Price (See Notes)
6.94

主要特征

  • 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
  • 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 Cup-Shaped 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

应用/用途

  • 借计卡
  • 电子旅行助理
  • 校准系数存储
  • 工作流程跟踪

描述

The iButton® 1Kb/4Kb memory (DS1992) is a rugged read/write data carrier that act as a localized database, easily accessible with minimal hardware. The nonvolatile memory and optional timekeeping capability offer a simple solution to storing and retrieving vital information pertaining to the object to which the iButton device is attached. Data is transferred serially through the 1-Wire® protocol that requires only a single data lead and a ground return.

The scratchpad is an additional page that acts as a buffer when writing to memory. Data is first written to the scratchpad where it can be read back. After the data has been verified, a copy scratchpad command transfers the data to memory. This process ensures data integrity when modifying the memory. A 48-bit serial number is factory lasered into each DS199_ to provide a guaranteed unique identity that allows for absolute traceability. The durable MicroCan® package is highly resistant to environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped profile is self-aligning with mating receptacles, allowing the DS199_ to be easily used by human operators. Accessories permit the DS199_ to be mounted on almost any surface including plastic key fobs, photo-ID badges, and PC boards. Applications include access control, work-in-progress tracking, electronic travelers, storage of calibration constants, and debit tokens.

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支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心