|Category||ASSP (Application-Specific Standard Products) => iButtons|
|Description||USB To 1-Wire/iButton Adapter
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.
|Company||Maxim Integrated Products|
|Datasheet||Download DS9490 datasheet
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 DevicesPART DESCRIPTION DS9490B# USB Single F5 iButton Holder with Protective Cap DS9490R# USB 1-Wire RJ11
#Denotes a RoHS-compliant device that may include lead(Pb) that is exempt under the RoHS requirements.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.
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 is a USB bridge and holder for a single F5-size iButton. The iButton is securely held behind a latched door. The is a USB bridge with 1-Wire RJ11 interface to accommodate 1-Wire receptacles and networks. The DS1402D-DR8 (Blue DotTM) 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 website under software support at systems can be found on the iButton www.maxim-ic.com/products/ibutton/software/tmex/index.cfm.
*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. The identification chip is a custom DS2401 that 64-bit ID number (see Figure 3).
MSB 8-BIT CRC CODE MSB LSB 12-BIT FIXED (000H) MSB 36-BIT SERIAL NUMBER LSB MSB LSB 8-BIT FAMILY CODE (81H) LSB MSB LSB
PIN 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 ConnectionPIN 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'. Once the iButton is inserted in the enclosure, snap the end cap over it. The end cap is removed by depressing the release tab with a paper clip, swinging it fully open, and sliding out the hinge.
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