ADI DS1972-F5+

The DS1972 is a 1024-bit, 1-Wire EEPROM chip organized as four memory pages of 256 bits each in a rugged iButton package. Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, the four memory pages can individually be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS1972 communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the device. The registration number is used to address the device in a multidrop, 1-Wire net environment.

• 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
• Individual Memory Pages Can Be Permanently Write Protected or Put in EPROM-Emulation Mode (“Write to 0”)
• Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
• IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, Typical)
• Reads and Writes Over a Wide Voltage Range from 2.8V to 5.25V from -40℃ to +85℃
• Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol
• Unique Factory-Lasered 64-Bit Registration Number Ensures 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

• Access Control/Parking Meter
• Work-in-Progress Tracking
• Tool Management
• Inventory Control
• Maintenance/Inspection Data Storage