Features and Benefits
- 4096 bits Electrically Erasable Programmable Read Only Memory (EEPROM)
- Overdrive mode boosts communication speed to 142kbps
- 256-bit scratchpad ensures integrity of data transfer
- Memory partitioned into 256-bit pages for packetizing data
- Reduces control, address, data and power to a single data pin
- 8-bit family code specifies DS1973 communication requirements to reader
- Reads and writes over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C
The iButton® 4Kb EEPROM (DS1973) is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached. This information can be accessed with minimal hardware, for example a single port pin of a micro-controller. The DS1973 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (23H) plus 4096 bits of EEPROM. The power to program and read the DS1973 is derived entirely from the 1-Wire® communication line. The memory is organized as sixteen pages of 256 bits each. The 64-bit registration number provides a guaranteed unique identity which allows for absolute traceability. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The durable MicroCan package is highly resistant to harsh environments such as dirt, moisture, and shock. Its compact button-shaped profile is self-aligning with cup-shaped receptacles, allowing the DS1973 to be used easily by human operators or automatic equipment. Accessories permit the DS1973 to be mounted on printed circuit boards, plastic key fobs, photo-ID badges, ID bracelets, and many other objects. Applications include work-in-progress tracking, electronic travelers, access control and storage of calibration constants.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
DS1973 Reliability Data1/12/2023
1-Wire Search Algorithm3/28/2002
Reading and Writing 1-Wire® Devices Through Serial Interfaces3/29/2001
iButton Data Loggers5/17/2019
White Paper 2: Using the 1-Wire® Public Domain Kit7/16/2008
1-Wire Software Resource Guide Device Description7/8/2008
How to Power the Extended Features of 1-Wire® Devices6/17/2008
Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications9/11/2007
What Is an iButton Device?5/17/2006
White Paper 5: Using 1-Wire APIs for Data Sheet Commands6/7/2002
1-Wire Communication Through Software5/30/2002
Using the DS2480B Serial 1-Wire® Line Driver3/12/2002
Programming 1-Wire EPROM and EEPROM Memory Devices Using a PC1/2/2002
Guidelines for Reliable Long Line 1-Wire Networks11/16/2001
1-Wire File Structure7/11/2001
Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products3/29/2001
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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