Product Description
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.
Applications
Access Control/Parking Meter
Work-in-Progress Tracking
Tool Management
Inventory Control
Maintenance/Inspection Data Storage
Features
♦ 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°C to +85°C
♦ Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol
Common iButton Features
♦ 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 itsRim
♦ Presence Detector Acknowledges When Reader First Applies Voltage
Product Characters:
| Item |
TM Card,TM iButton |
| Materal |
ABS ,Stainless Steel |
| Size |
16.25*5.89mm |
| Chip |
Compatible Ds1972-F5 |
| Memry |
1024 bit |
| Read-Write Method |
Contact |
| Working Temperature |
-40 ~ +85 degree |
| Sort |
Common TM card,magnetic TM Card |
| Crafts |
Engraving |
| Colors |
Red, green, blue, yellow, black, etc |
| Application |
Intelligent Community, Postal Service, Railway St, etc. |
Detailed Photos
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