DS1982
1-kbit Add-Only iButtonTM
www.iButton.com
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
ꢀ 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 16.3 kbits per
second
ꢀ 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
ꢀ Standard 16 mm 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
ꢀ Meets UL#913 (4th Edit.); Intrinsically Safe
Apparatus, Approved under Entity Concept
for use in Class I, Division 1, Group A, B, C
and D Locations (application pending)
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
F3 MICROCAN
F5 MICROCAN
5.89
3.10
0.36
0.51
0.36
0.51
c
c
1993
1993
16.25
16.25
YYWW REGISTERED RR
YYWW REGISTERED RR
09
09
97
17
17.35
17.35
000000FBC52B
000000FBD8B3
DATA
GROUND
DATA
GROUND
All dimensions shown in millimeters.
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