DS1982 Datasheet, PDF (1/24 Pages) Dallas Semiconductor – 1-kbit Add-Only iButton

19-4891; Rev 8/09
SPECIAL FEATURES
 1024 bits Electrically Programmable Read-
Only Memory (EPROM) communicates with
the economy of one signal plus ground
 EPROM partitioned into four 256-bit pages for
randomly accessing packetized data
 Each memory page can be permanently write-
protected to prevent tampering
 Device is an “add only” memory where
additional data can be programmed into
EPROM without disturbing existing data
 Architecture allows software to patch data by
superseding an old page in favor of a newly
programmed page
 Reduces control, address, data, power, and
programming signals to a single data pin
 8-bit family code specifies DS1982
communications requirements to reader
 Reads over a wide voltage range of 2.8V to
6.0V from -40°C to +85°C; programs at 11.5V
to 12.0V from -40°C to +50°C
ORDERING INFORMATION
DS1982-F3+
F3 MicroCan
DS1982-F5+
F5 MicroCan
+Denotes a lead(Pb)-free/RoHS-compliant product.
EXAMPLES OF ACCESSORIES
DS9096P
Self-Stick Adhesive Pad
DS9101
Multi-Purpose Clip
DS9093RA
Mounting Lock Ring
DS9093F
Snap-In Fob
DS9092
iButton Probe
F3 MicroCan
DS1982
1Kb Add-Only iButton
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 cup-shaped
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
iButton and 1-Wire are registered trademarks of Maxim Integrated Products, Inc.
F5 MicroCan
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