DS9490R_11 Datasheet, PDF (1/6 Pages) Maxim Integrated Products – USB to 1-Wire/iButton Adapters High-Speed 12Mbps Universal Serial Bus (USB) Interface

19-4881; Rev 6/11
DS9490R/DS9490B
USB to 1-Wire/iButton Adapters
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
the DS1402D-DR8
 DS9490B has an iButton^® Interface and
Retains a Fixed iButton
 Built-In Custom DS2401 Identification Chip
 Reads all 1-Wire and iButton Devices.
Writes All Except EPROM 1-Wire/iButton
Devices
APPLICATIONS
 Software Authorization—Protection against
software piracy by tying software operation to
the presence of iButton hardware.
 iButton Initialization and Download—Loggers
like the Thermochron^® can be missioned and
downloaded.
 Demonstration—Demonstrate the features of
iButtons or 1-Wire chips on personal
computers.
 Development—Aid development of 1-Wire
applications by providing a PC interface to
verify device contents and state.
TYPICAL OPERATING CIRCUIT
PC ^USB
DS9490B _iButton
PC
USB
DS9490R
DS1402D-DR8
ORDERING INFORMATION
PART
TYPE
DS9490B#
USB Single F5 iButton Holder
with Protective Cap
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.
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^®-based PCs can be downloaded from
www.maxim-ic.com/1-Wiredrivers.
1-Wire, iButton, and Thermochron are registered trademarks of Maxim Integrated Products, Inc.
Windows is a registered trademark of Microsoft Corp.
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