DS9490R/DS9490B USB to 1-Wire/iButton Adapter www.maxim-ic.com FEATURES § § § § § § § TYPICAL OPERATING CIRCUIT 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 PC PC USB DS9490B USB iButton DS9490R DS1402D-DR8 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. ORDERING INFORMATION PART DS9490B DS9490R DESCRIPTION USB Single F5 iButton Holder with Protective Cap 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 1Wire 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 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. 1 of 5 050503 DS9490 Figure 1. DS9490R * Color subject to change Figure 2. DS9490B * Color subject to change * *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 is a 64-bit ID number (see Figure 3). Figure 3. DS2401 ID CHIP 64-BIT LASERED ROM MSB LSB 8-BIT CRC CODE MSB LSB 12-BIT FIXED (000H) MSB 36-BIT SERIAL NUMBER LSB MSB 8-BIT FAMILY CODE (81H) LSB MSB 2 of 5 LSB DS9490 PIN CONFIGURATION Figure 4. 1-WIRE RJ11 SOCKET FOR DS9490R PIN 1 2 3 4 5, 6 6 SIGNAL NAME VDD GND OW GND_OW N.C. N.C. DESCRIPTION 5VDC Output Power Ground 1-Wire Data 1-Wire Return No Connection No Connection 6 5 4 3 2 1 Looking into Female RJ11 Figure 5. iBUTTON SOCKET FOR DS9490B PIN 1 2 SIGNAL NAME OW GND_OW DESCRIPTION 1-Wire Data 1-Wire Return 2 * 1 *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, swinging it fully open, and sliding out the hinge. 3 of 5 DS9490 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 3.28 ENVIRONMENTAL REQUIREMENTS CONDITION Storage Storage Storage Operating Operating PARAMETER Temperature Relative humidity, noncondensing Duration Temperature Relative humidity, noncondensing VALUE -10°C to +85°C 95% 1yr (max) at 95%RH and +85°C 0°C to +70°C 80% 4 of 5 DS9490 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. Note that in suspend mode there is zero current available to an external circuit. An external circuit cannot detect when the module is in suspend or active mode. Consequently, when in suspend mode, the DS9490R module with external circuit combination is in violation of the USB power specification. Application developers should be aware of this when using this module in conjunction with an externally powered circuit on power restricted platforms such as laptops. *Guaranteed by design, not production tested. **Tested at DS2490 component level. Figure 8. FUNCTIONAL DIAGRAM USB Connector VBUS DD+ GND EMI Filter 1 L1 2 3 4 EMI Filter 1 L2 3 J1 C1 0.1uF LP2980IM5-3.3 C2 1.0uF 4 VIN EN N/C VOUT GND 5 C3 4.7 1 2 R1 1.5K U1 5 R2 24 R3 24 7 8 10 C7 33pF DS2401 OW GND C8 33pF 12 DS2490 U2 PMOD NC NC NC VB SUSO DD+ NC OW NC GND VD NC NC NC X1 X0 NC VPP NC NC NC NC 24 1 19 X1 12Mhz 20 17 3 C6 33pF C5 33pF U3 2 DS9503 1 6 5 OW GND U4 1 Female RJ11 2 1 2 3 4 5 6 J2 DS9490R iButton Socket 1 2 J3 DS9490B 5 of 5