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050503
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. Monetary
iButtons can be refilled with money.
§
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
DESCRIPTION
DS9490B
USB Single F5 iButton Holder
with Protective Cap
DS9490R
USB to 1-Wire RJ11
PACKAGING/SHIPPING
INFORMATION
The part is shipped individually in an anti-static
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. The DS1402D-DR8 (Blue Dot™) can readily be used in conjunction with
the DS9490R to create an iButton PC reader. Both adapters are based on the DS2490 USB to 1-Wire
bridge chip.
PC software drivers for Windows
®
98, Windows 2000, Windows ME, and Windows XP can be found on
the iButton website under software support at:
http://www.ibutton.com/software/tmex/index.html
DS9490R/DS9490B
USB to 1-Wire/iButton Adapter
www.maxim-ic.com
1-Wire, iButton, and Thermochron are registered trademarks of
Dallas Semiconductor.
Blue Dot is a trademark of Dallas Semiconductor.
Windows is a registered trademark of Micosoft Corp.
