DS1990A Datasheet, PDF (1/10 Pages) Dallas Semiconductor – Serial Number iButton

DS1990A
Serial Number iButton^TM
www.dalsemi.com
DS1990A SPECIAL FEATURES
§ Upgrade of DS1990 allows multiple Serial
F3 MICROCAN^TM
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
0.36
3.10
0.51
c 1993
16.25
YYWW REGISTERED RR
66
01
000000FBC52B
17.35
+85°C
COMMON iButton FEATURES
§ Unique, factory-lasered and tested 64-bit
registration number (8-bit family code + 48-
DATA
GROUND
F5 MICROCAN^TM
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
5.89
0.36
0.51
c 1993
YYWW REGISTERED RR
E6
01
000000FBD8B3
16.25
17.35
object
§ Economically communicates to bus master
with a single digital signal at 16.3k bits per
DATA
GROUND
second
§ Standard 16 mm diameter and 1-Wire^TM
All dimensions shown in millimeters
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
ORDERING INFORMATION
DS1990A-F3
F3 MicroCan
DS1990A-F5
F5 MicroCan
EXAMPLES OF ACCESSORIES
DS9096P
Self-Stick Adhesive Pad
DS9101
Multi-Purpose Clip
DS9093RA
Mounting Lock Ring
DS9093F
Snap-In Fob
DS9092
iButton Probe
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
081999