DS9490R Datasheet, PDF (1/6 Pages) Maxim Integrated Products – USB to 1-Wire/iButton Adapter

19-4881; Rev 8/09
www.maxim-ic.com
DS9490R/DS9490B
USB to 1-Wire/iButton Adapter
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
#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 anti-static
bag.
1-Wire, iButton, and Thermochron are registered trademarks of Maxim
Integrated Products, Inc.
Blue Dot is a trademark of Maxim Integrated Products, Inc.
Windows and Windows XP are registered trademarks of Microsoft Corp.
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^® operating
systems can be found on the iButton website under software support at
www.maxim-ic.com/products/ibutton/software/tmex/index.cfm.
1 of 6