DS9490B [DALLAS]
USB to 1-Wire/iButton Adapter; USB至1-Wire / iButton的适配器
| 型号： | DS9490B |
| 厂家： | 
DALLAS SEMICONDUCTOR |
| 描述： | USB to 1-Wire/iButton Adapter |
| 文件： | 总5页 (文件大小：210K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS9490R/DS9490B
USB to 1-Wire/iButton Adapter
www.maxim-ic.com
FEATURES
TYPICAL OPERATING CIRCUIT
C High-Speed 12Mbps Universal Serial Bus
(USB) Interface
C Supports Standard and Overdrive 1-Wire®
Communication
USB
USB
PC
PC
DS9490B
DS9490R
iButton
C Slew-Rate-Controlled 1-Wire Timing and
Active Pullup for Improved 1-Wire Network
Performance
C DS9490R has an RJ11 Interface for Standard
Connectivity Accessories such as the
DS1402D-DR8
C DS9490B has an iButton® Interface and
Retains a Fixed iButton
DS1402D-DR8
C Built-In Custom DS2401 Identification Chip
C Reads all 1-Wire and iButton Devices. Writes
All Except EPROM 1-Wire/iButton Devices
APPLICATIONS
C Software Authorization—Protection against
software piracy by tying software operation to
the presence of iButton hardware.
ORDERING INFORMATION
PART
DESCRIPTION
USB Single F5 iButton Holder
with Protective Cap
C iButton Initialization and Download—
Loggers like the Thermochron® can be
missioned and downloaded. Monetary
iButtons can be refilled with money.
C Demonstration—Demonstrate the features of
iButtons or 1-Wire chips on personal
computers.
DS9490B
DS9490R
USB to 1-Wire RJ11
PACKAGING/SHIPPING
INFORMATION
The part is shipped individually in an anti-static
bag.
C Development—Aid development of 1-Wire
applications by providing a PC interface to
verify device contents and state.
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 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
1 of 5
050503
Dallas Semiconductor.
Blue Dot is a trademark of Dallas Semiconductor.
Windows is a registered trademark of Micosoft Corp.
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
12-BIT
FIXED
(000H)
36-BIT SERIAL
NUMBER
8-BIT
CRC CODE
8-BIT FAMILY
CODE (81H)
MSB LSB
MSB
LSB MSB
LSB MSB LSB
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DS9490
PIN CONFIGURATION
Figure 4. 1-WIRE RJ11 SOCKET FOR DS9490R
SIGNAL
PIN
DESCRIPTION
NAME
VDD
5VDC Output
Power Ground
1-Wire Data
1-Wire Return
No Connection
No Connection
1
2
GND
6
5
4
3
2
1
OW
3
GND_OW
N.C.
4
Looking into Female RJ11
5, 6
6
N.C.
Figure 5. iBUTTON SOCKET FOR DS9490B
SIGNAL
PIN
DESCRIPTION
NAME
OW
GND_OW
1-Wire Data
1-Wire Return
1
2
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.
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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
PARAMETER
VALUE
-10°C to +85°C
95%
Temperature
Storage
Relative humidity, noncondensing
Duration
Storage
1yr (max) at 95%RH and +85LC
0°C to +70°C
Operating
Operating
Temperature
Relative humidity, noncondensing
80%
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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
EMI Filter
L1
1
VBUS
C1
2
0.1uF
D-
3
LP2980IM5-3.3
D+
4
EMI Filter
1
3
5
2
GND
L2
VIN
EN
VOUT
GND
U2
DS2490
C3
4.7
1
24
PMOD VD
N/C
C2
J1
4
R1
1.0uF
NC
NC
NC
NC
X1
1.5K
U1
NC
NC
1
5
7
8
19
20
VB
R2 24
X1
SUSO
D-
X0
12Mhz
NC
VPP
NC
NC
NC
NC
17
3
D+
R3 24
NC
10
OW
NC
C6
33pF
C5
33pF
C8
33pF
C7
12
GND
33pF
U3
2
DS2401
OW
GND
1
1
6
OW
GND
Female RJ11
5
2
1
2
3
4
5
6
U4
J2
DS9490R
iButton Socket
1
2
J3
DS9490B
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