DS1990A
Serial Number iButton
TM
www.dalsemi.com
DS1990A SPECIAL FEATURES
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Upgrade of DS1990 allows multiple Serial
Number iButtons to reside on a common bus
Unique 48–bit serial number
Low-cost electronic key for access control
8-bit CRC for checking data integrity
Can be read in less than 5 ms
Operating temperature range of -40°C to
+85°C
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 by momentary contact
Chip-based data carrier compactly stores
information
Data can be accessed while affixed to an
object
Economically communicates to bus master
with a single digital signal at 16.3k bits per
second
Standard 16 mm diameter and 1-Wire
TM
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 1, Division 1, Group A, B, C
and D locations
1 of 10
F3 MICROCAN
TM
3.10
0.36
0.51
c
1993
16.25
YYWW REGISTERED RR
66
01
17.35
000000FBC52B
DATA
COMMON iButton FEATURES
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GROUND
F5 MICROCAN
TM
5.89
0.36
0.51
c
1993
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16.25
YYWW REGISTERED RR
E6
01
17.35
000000FBD8B3
DATA
GROUND
All dimensions shown in millimeters
ORDERING INFORMATION
DS1990A-F3
DS1990A-F5
DS9096P
DS9101
DS9093RA
DS9093F
DS9092
F3 MicroCan
F5 MicroCan
Self-Stick Adhesive Pad
Multi-Purpose Clip
Mounting Lock Ring
Snap-In Fob
iButton Probe
EXAMPLES OF ACCESSORIES
081999
DALLAS [ DALLAS SEMICONDUCTOR ]
