Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsDev KitsAdapter

AVAILABLE

Functional Diagrams

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and

ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

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 i

Button

Interface and

Retains a Fixed i

Button

 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

USB

DS9490B

iButton

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.

USB to 1-Wire/iButton Adapters

1-Wire, iButton, and Thermochron are registered trademarks of Maxim Integrated Products, Inc.

Windows is a registered trademark of Microsoft Corp.

19-4881; Rev 6/11

DS9490R/DS9490B

Summary of content (6 pages)

PAGE 1
LE AVAILAB 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
PAGE 2
DS9490R/DS9490B 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 inserted. The data contact faces down and away from the embossed ‘i’. Before inserting the paper clip disconnect the DS9490B from the USB bus. Each USB bridge contains a unique built-in identification chip.
PAGE 3
DS9490R/DS9490B DS9490R/DS9490B PIN CONFIGURATION Figure 4. 1-Wire RJ11 SOCKET FOR DS9490R PIN 1 2 3 4 5 6 SIGNAL NAME VDD GND OW GND_OW SUSO N.C. DESCRIPTION 5VDC Output Power Ground 1-Wire Data 1-Wire Return USB Suspend Output No Connection 6 5 4 3 2 1 Looking into Female RJ11 Connector Figure 5. iButton SOCKET FOR DS9490B PIN 1 2 SIGNAL NAME OW GND_OW DESCRIPTION 1-Wire Data 1-Wire Return *Note: The data contact faces down and away from the embossed ‘i’.
PAGE 4
DS9490R/DS9490B MECHANICAL DIMENSIONS All dimensions are in millimeters. Figure 6. DS9490R 11.66 20.42 42.65 13.89 21.54 3.12 Figure 7. DS9490B 56.82 24.94 11.66 8.74 16.54 3.
PAGE 5
DS9490R/DS9490B DS9490R/DS9490B ELECTRICAL CHARACTERISTICS PARAMETER USB I/F 1-Wire I/F SPECIFICATION As defined in Chapter 7 of the USB Specification* 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 VBUS power and ground available on the RJ11 connector. In active mode the current available to an externally powered fixture is 42mA* (100mA to 58mA); however it is recommended that no more than 25mA be used.
PAGE 6
DS9490R/DS9490B REVISION HISTORY REVISION DESCRIPTION DATE 5/03 Initial release Added RoHS-compliant part numbers to the Ordering Information table; replaced product graphics with product photos; changed 1/07 schematic and Figure 4 to route the SUSO signal to RJ11 pin 5; reworded the text in the Electrical Characteristics section to include the SUSO pin and its use Removed references to leaded packages in the Ordering Information 8/09 table; added the Revision History table Deleted reference to monetary i