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DS1982数据手册封面

DS1982 Datasheet

  • DS1982

  • 1-kbit Add-Only iButtonTM

  • 691.84KB

  • Dallas   Dallas

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DS1982
1-kbit Add-Only iButton
TM
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
Device is an 鈥渁dd only鈥?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掳C to +85掳C; programs at
11.5V to 12.0V from -40掳C to +50掳C
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
Standard 16 mm diameter and 1-Wire
庐
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
3.10
0.36
0.51
c
1993
F5 MICROCAN
5.89
0.36
16.25
0.51
c
1993
16.25
YYWW REGISTERED RR
YYWW REGISTERED RR
97
09
17.35
17
09
17.35
000000FBC52B
000000FBD8B3
DATA
GROUND
DATA
GROUND
All dimensions shown in millimeters
.
1 of 23
011800

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