DS1977

iButton 32KB EEPROM


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Description

The iButton® 32KB EEPROM (DS1977) provides password protected access to data, both for read-only and full access. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1977 is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock. Accessories permit the DS1977 to be mounted on almost any object, including containers, pallets, and bags.

Key Features

SPECIAL FEATURES
  • 32KB EEPROM Organized as Pages of 64 Bytes Each
  • Optional Password Protection with Different 64-Bit Passwords for Read and Full Access
  • Communicates to Host with a Single Digital Signal at Up to 15.3kbps at Standard Speed or Up to 125kbps in Overdrive Mode Using 1-Wire Protocol
  • Operating Range: 2.8V to 5.25V, -40°C to +85°C
  • Minimum 100k Write Cycles Endurance
  • 15kV Built-in ESD Protection
COMMON iButton FEATURES
  • Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Traceability Because No Two Parts are Alike
  • Built-In Multidrop Controller for 1-Wire Net
  • Chip-Based Data Carrier Stores Digital Identification and Information, Armored in a Durable Stainless-Steel Case
  • Data can be Accessed While Affixed to Object
  • Button Shape is Self-Aligning with Cup-Shaped Probes
  • 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

Applications/Uses

  • Audit Data Storage and Carrier
  • Health Data Carrier
  • Maintenance/Inspection Data Storage
  • Medical Data Carrier
Part NumberTechnologyApplicationsMemory TypeMemory SizeSecurity FeaturesUnique WareReal Time ClockBudgetary
Price
See Notes
DS1977 iButtonAsset ManagementEEPROM32K BytesPassword ProtectedNoNo$8.80 @1k
See All iButton Products (17)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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