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Maxim Integrated Semiconductor Electronic Components Datasheet

DS1990R Datasheet

Serial Number IButton

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19-4894; Rev 8/09
www.maxim-ic.com
GENERAL DESCRIPTION
The DS1990R Serial Number iButtonis a rugged
data carrier that serves as an electronic registration
number for automatic identification. Data is
transferred serially through the 1-Wireprotocol,
which requires only a single data lead and a ground
return. Every DS1990R is factory lasered with a
guaranteed unique 64-bit registration number that
allows for absolute traceability. The durable
stainless-steel iButton package is highly resistant to
environmental hazards such as dirt, moisture, and
shock. Its compact coin-shaped profile is self-aligning
with mating receptacles, allowing the DS1990R to be
used easily by human operators. Accessories permit
the DS1990R iButton to be mounted on almost any
object, including containers, pallets, and bags. The
DS1990R is a fully compatible variant of the
DS1990A. In applications where a presence pulse on
contact is critical the DS1990R should be preferred
over the DS1990A.
APPLICATIONS
Access Control
Work-In-Progress Tracking
Tool Management
Inventory Control
MicroCAN
www.DataSheet4U.com
F3 size F5 size
3.10 5.89
0.51
0.51
Branding
16.25
89 01
000000FBC52B
1-Wire
17.35
IO GND IO GND
All dimensions are shown in millimeters.
DS1990R
Serial Number iButton
SPECIAL FEATURES
Upgrade of DS1990A Guarantees Presence
Pulse on Contact
Can be Read in Less Than 5ms
Operating Range: 2.8V to 6.0V, -40°C to +85°C
COMMON iButton FEATURES
Unique Factory-Lasered 64-Bit Registration
Number Assures Error-Free Device Selection
and Absolute Traceability Because No Two Parts
are Alike
Built-In Multidrop Controller for 1-Wire Net
Digital Identification by Momentary Contact
Data can be Accessed While Affixed to Object
Economically Communicates to Bus Master with
a Single Digital Signal at 16.3kbps
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
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS1990R-F5# -40°C to +85°C F5 iButton
DS1990R-F3# -40°C to +85°C F3 iButton
#Denotes a RoHS-compliant device that may include lead(Pb) that is
exempt under the RoHS requirements.
EXAMPLES OF ACCESSORIES
PART
DS9096P
DS9101
DS9093RA
DS9093A
DS9092
DESCRIPTION
Self-Stick Adhesive Pad
Multipurpose Clip
Mounting Lock Ring
Snap-In Fob
iButton Probe
iButton and 1-Wire are registered trademarks of Maxim Integrated Products, Inc.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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Maxim Integrated Semiconductor Electronic Components Datasheet

DS1990R Datasheet

Serial Number IButton

No Preview Available !

PHYSICAL SPECIFICATION
Size
Weight DS1990R
DS1990R: Serial Number iButton
See Mechanical Drawing
Ca. 2.5 grams
ABSOLUTE MAXIMUM RATINGS
IO Voltage to GND
IO Sink Current
Junction Temperature
Storage Temperature Range
-0.5V, +6.0V
20mA
+125°C
-55°C to +125°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
IO Pin General Data
1-Wire Pullup Resistance
RPUP (Notes 1, 2)
Input Capacitance
Input Load Current
CIO (Note 3, 4)
IL (Note 5)
Input Low Voltage
Input High Voltage
Output-Low Voltage at 4mA
Output-High Voltage
Operating Charge
VIL (Notes 1, 6, 7)
VIH (Notes 7, 8)
VOL (Note 7)
VOH (Notes 7, 9)
QOP (Note 4, 10)
Recovery Time
Timeslot Duration
tREC
tSLOT
(Note 1)
(Note 1)
IO Pin, 1-Wire Reset, Presence Detect Cycle
Reset Low Time
Reset High Time
tRSTL
tRSTH
(Notes 1, 11)
(Notes 1, 12)
www.PDaretasSehneecte4UD.ceotmect High Time
Presence Detect Low Time
Presence Detect Sample
Time
tPDH
tPDL (Note 13)
tMSP (Note 1)
IO Pin, 1-Wire Write
Write-0 Low Time
Write-1 Low Time
tW0L (Note 1)
tW1L (Notes 1, 14)
IO Pin, 1-Wire Read
Read Low Time
Read Sample Time
tRL (Notes 1, 15)
tMSR (Notes 1, 15)
(VPUP = 2.8V to 6.0V, TA = -40°C to +85°C.)
MIN
TYP
MAX UNITS
0.6
0.25
2.2
1
61
100
VPUP
30
5
800
0.8
0.4
k
pF
µA
V
V
V
V
nC
µs
µs
480 µs
480 µs
15 60 µs
60 240 µs
60 75 µs
60
1
1
tRL +
120
15 -
15 -
15
µs
µs
µs
µs
2 of 9


Part Number DS1990R
Description Serial Number IButton
Maker Maxim Integrated Products
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DS1990R Datasheet PDF






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