DS1992L-F5 Memory iButton with Red Fob Assembled

DS1992L-F5 Memory iButton with Red Fob Assembled

DS1992L-F5 w/ Red Fob

Place of Origin: China(Mainland)                   Part Number: DS1992L-F5-R           Brand Name: Dallas / Maxim Integrated
Min. Order Quantity: 100 Pieces                     Port: Guangzhou                                 Payment Terms: T/T, Western Union, Paypal

DS1992L-F5 Memory iButton with Red Fob Assembled


The DS1992L memory iButton is a rugged read/write data carriers that acts 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 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 DS1992L 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 DS1992L to be easily used by human operators. Accessories permit the DS1992L to be mounted on almost any surface including plastic key fobs, photo-ID badges, and PC boards.

Special Features

  • 1024 bits of Read/Write Nonvolatile Memory
  • 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
  • Designed to meet UL#913 (4th Edit.); Intrinsically Safe Apparatus, Under Entity Concept for use in Class I, Division 1, Group A, B, C and D Locations, contact Dallas Semiconductor for certification schedule



  • Access control
  • Work-in-progress tracking
  • Electronic travelers
  • Storage of calibration constants
  • Debit tokens


The DS1992L-F5 can be found on its data sheet here: DS1992L-F5 DataSheet.

*Note: iButton and 1-Wire are registered trademarks of Maxim.