DS9490R [MAXIM]
USB to 1-Wire/iButton Adapter; USB至1-Wire / iButton的适配器
| 型号： | DS9490R |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | USB to 1-Wire/iButton Adapter |
| 文件： | 总6页 (文件大小：546K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4881; Rev 8/09
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
USB
PC
DS9490B
iButton
. 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
USB
PC
DS9490R
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
ORDERING INFORMATION
PART
DESCRIPTION
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.
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.
PACKAGING/SHIPPING
INFORMATION
The part is shipped individually in an anti-static
bag.
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 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® operating
systems
can
be
found
on
the
iButton
website
under
software
support
at
www.maxim-ic.com/products/ibutton/software/tmex/index.cfm.
1 of 6
DS9490
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
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
2 of 6
DS9490
PIN CONFIGURATION
Figure 4. 1-Wire RJ11 SOCKET FOR DS9490R
SIGNAL
NAME
PIN
DESCRIPTION
5VDC Output
VDD
1
2
3
4
5
6
6
5
4
3
2
1
GND
Power Ground
1-Wire Data
OW
GND_OW
SUSO
N.C.
1-Wire Return
USB Suspend Output
No Connection
Looking into Female RJ11
Connector
Figure 5. iButton SOCKET FOR DS9490B
SIGNAL
NAME
PIN
DESCRIPTION
OW
GND_OW
1-Wire Data
1
2
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 with a
paper clip, swinging it fully open, and sliding out the hinge.
3 of 6
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 +85C
0°C to +70°C
Operating
Operating
Temperature
Relative humidity, noncondensing
80%
4 of 6
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. 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
EMI Filter
L1
1
VBUS
D-
D+
C1
0.1uF
2
3
LP2980IM5-3.3
4
EMI Filter
1
3
5
2
GND
L2
VIN
EN
N/C
VOUT
GND
U2
DS2490
C3
4.7
24
J1
1
5
PMOD VD
C2
1.0uF
4
R1
1.5K
NC
NC
NC
VB
SUSO
D-
D+
NC
OW
NC
NC
NC
X1
U1
1
19
20
R2 24
X1
12Mhz
X0
7
NC
VPP
NC
NC
NC
NC
17
3
8
R3 24
10
C6
33pF
C5
33pF
NC
GND
C8
33pF
C7
33pF
12
U3
2
DS2401
OW
GND
DS9503
OW
R7 10
1
1
2
6
5
Female RJ11
GND
1
2
3
4
5
6
U4
J2
DS9490R
iButton Socket
1
2
J3
DS9490B
5 of 6
DS9490
REVISION HISTORY
REVISION
DESCRIPTION
PAGES
DATE
CHANGED
Removed references to leaded packages in the Ordering Information
table.
8/09
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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