DS9490R_11 MAXIM [Maxim Integrated Products], DS9490R_11 Datasheet

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DS9490R_11

Manufacturer Part Number
DS9490R_11
Description
USB to 1-Wire/iButton Adapters High-Speed 12Mbps Universal Serial Bus (USB) Interface
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1-Wire, iButton, and Thermochron are registered trademarks of Maxim Integrated Products, Inc.
Windows is a registered trademark of Microsoft Corp.
FEATURES
 High-Speed 12Mbps Universal Serial Bus
 Supports Standard and Overdrive 1-Wire
 Slew-Rate-Controlled 1-Wire Timing and
 DS9490R has an RJ11 Interface for
 DS9490B has an iButton
 Built-In Custom DS2401 Identification Chip
 Reads all 1-Wire and iButton Devices.
APPLICATIONS
 Software Authorization—Protection against
 iButton Initialization and Download—Loggers
 Demonstration—Demonstrate the features of
 Development—Aid development of 1-Wire
DESCRIPTION
The DS9490B is a USB bridge and holder for a single F5-size iButton. The iButton is securely held behind
a latched door. The DS9490R is a USB bridge with 1-Wire RJ11 interface to accommodate 1-Wire
receptacles and networks. For a list of suitable 1-Wire network cables, refer to the Connectivity Matrix
table in the DS1402x 1-Wire network cables data sheet. Both adapters are based on the DS2490 USB-to-
1-Wire bridge chip. Free software drivers for Windows
www.maxim-ic.com/1-Wiredrivers.
(USB) Interface
Communication
Active Pullup for Improved 1-Wire Network
Performance
Standard Connectivity Accessories such as
the DS1402D-DR8
Retains a Fixed iButton
Writes All Except EPROM 1-Wire/iButton
Devices
software piracy by tying software operation to
the presence of iButton hardware.
like the Thermochron
downloaded.
iButtons or 1-Wire chips on personal
computers.
applications by providing a PC interface to
verify device contents and state.
®
can be missioned and
®
Interface and
®
1 of 6
USB to 1-Wire/iButton Adapters
TYPICAL OPERATING CIRCUIT
ORDERING INFORMATION
DS9490B#
DS9490R# USB-to-1-Wire RJ11
#Denotes a RoHS-compliant device that may include lead(Pb) that is
exempt under the RoHS requirements.
PACKAGING/SHIPPING
INFORMATION
The part is shipped individually in an antistatic
bag.
PART
®
-based PCs can be downloaded from
USB Single F5 iButton Holder
with Protective Cap
PC
PC
DS9490R/DS9490B
USB
USB
DS1402D-DR8
DS9490B
DS9490R
TYPE
19-4881; Rev 6/11
iButton

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DS9490R_11 Summary of contents

Page 1

FEATURES  High-Speed 12Mbps Universal Serial Bus (USB) Interface  Supports Standard and Overdrive 1-Wire Communication  Slew-Rate-Controlled 1-Wire Timing and Active Pullup for Improved 1-Wire Network Performance  DS9490R has an RJ11 Interface for Standard Connectivity Accessories such as ...

Page 2

Figure 1. DS9490R Figure 2. DS9490B *Note: To eject an iButton, insert a straightened paper clip into the side access hole of the DS9490B. Push the paper clip in the direction of the iButton. A different iButton can then be ...

Page 3

PIN CONFIGURATION Figure 4. 1-Wire RJ11 SOCKET FOR DS9490R SIGNAL PIN DESCRIPTION NAME V 5VDC Output 1 DD GND Power Ground 1-Wire Data 4 GND_OW 1-Wire Return SUSO USB Suspend Output 5 N.C. No Connection 6 Figure ...

Page 4

MECHANICAL DIMENSIONS All dimensions are in millimeters. Figure 6. DS9490R 3.12 Figure 7. DS9490B 24.94 16.54 ENVIRONMENTAL REQUIREMENTS CONDITION Storage Temperature Storage Relative humidity, noncondensing Storage Duration Operating Temperature Operating Relative humidity, noncondensing 11.66 42.65 13.89 56.82 PARAMETER 1yr (max) ...

Page 5

ELECTRICAL CHARACTERISTICS PARAMETER USB I/F As defined in Chapter 7 of the USB Specification* 1-Wire I/F See the DS2490 data sheet** The DS9490R and DS9490B consume 58mA in USB active mode and 0.5mA in suspend mode*. The DS9490R has the ...

Page 6

REVISION HISTORY REVISION DATE 5/03 Initial release Added RoHS-compliant part numbers to the Ordering Information table; replaced product graphics with product photos; changed schematic and Figure 4 to route the SUSO signal to RJ11 pin 5; 1/07 reworded the text ...

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