The DS1971 256-bit EEPROM iButton 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 microcontroller. The DS1971 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 (14H) plus 256 bits of EEPROM. The power to program and read the DS1971 is derived
entirely from the 1-Wire communication line. Data is transferred serially via the 1-Wire protocol which
requires only a single data lead and a ground return. The 48-bit serial number that is factory-lasered into
each DS1971 provides a guaranteed unique identity which allows for absolute traceability. 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 DS1971 to be used easily
by human operators or automatic equipment. Accessories permit the DS1971 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.
关键特性
256-bit Electrically Erasable Programmable
Read Only Memory (EEPROM)
communicates with the economy of one
signal plus ground
EEPROM organized as one 256-bit page
64-bit one-time programmable application
register is automatically write-protected after
programming
Reduces control, address, data, power, and
programming signals to a single data pin
8-bit family code specifies DS1971
communications requirements to reader
Reads and writes over a wide voltage range
of 2.8V to 6.0V from -40°C to +85°C
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 prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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