19-4881; Rev 6/11 DS9490R/DS9490B USB to 1-Wire/iButton Adapters 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 iButton DS9490R ORDERING INFORMATION PART DS9490R# 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. DS9490B DS1402D-DR8 DS9490B# APPLICATIONS USB TYPE USB Single F5 iButton Holder with Protective Cap 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-to1-Wire bridge chip. Free software drivers for Windows®-based PCs can be downloaded from www.maxim-ic.com/1-Wiredrivers. 1-Wire, iButton, and Thermochron are registered trademarks of Maxim Integrated Products, Inc. Windows is a registered trademark of Microsoft Corp. 1 of 6 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. 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 6 LSB 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’. 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. 3 of 6 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 3.28 ENVIRONMENTAL REQUIREMENTS CONDITION Storage Storage Storage Operating Operating PARAMETER VALUE -10°C to +85°C 95% 1yr (max) at 95%RH and +85°C 0°C to +70°C 80% Temperature Relative humidity, noncondensing Duration Temperature Relative humidity, noncondensing 4 of 6 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. An external circuit can detect when the module is in suspend by monitoring the SUSO signal on Pin 5 of the RJ11 connector. When this condition is detected, the external circuit must also go into a low power state. NOTE: The SUSO pin of the DS2490 is an open drain output and requires a pullup resistor to create a valid signal. See the DS2490 data sheet for the conditions where SUSO is active. Revision C of the DS9490R and all revisions of the DS9490R# have SUSO routed to the RJ11 connector. The availability of SUSO at the RJ11 connector is not production tested. Therefore, before relying on SUSO in an application, first verify the presence of this signal with the particular adapter. *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 C1 0.1uF LP2980IM5-3.3 EMI Filter 1 L2 3 J1 C2 1.0uF 4 VIN EN N/C VOUT GND 5 C3 4.7 R1 1.5K U1 5 R2 24 7 8 R3 24 10 C7 33pF DS2401 OW GND 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 2 C8 33pF 12 1 19 X1 12Mhz 20 17 3 C6 33pF C5 33pF U3 2 DS9503 1 6 5 R7 10 1 OW GND U4 Female RJ11 2 1 2 3 4 5 6 J2 DS9490R iButton Socket 1 2 J3 DS9490B 5 of 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 iButtons; added reference to the 6/11 Connectivity Matrix table in the DS1402x 1-Wire network cables data sheet; revised description and URL for software drivers download PAGES CHANGED — 1, 2, 3, 5 1, 6 1 6 of 6 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. M a x im I n t e g r a t e d P r o d uc t s , 1 2 0 S a n G a b r ie l D r iv e , S un n y v a le , C A 9 4 0 8 6 4 0 8 - 7 3 7 - 7 6 0 0 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.