DS9490R_11 [MAXIM]
USB to 1-Wire/iButton Adapters High-Speed 12Mbps Universal Serial Bus (USB) Interface; USB至1-Wire / iButton的适配器12Mbps高速通用串行总线（ USB ）接口
| 型号： | DS9490R_11 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | USB to 1-Wire/iButton Adapters High-Speed 12Mbps Universal Serial Bus (USB) Interface |
| 文件： | 总6页 (文件大小：228K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
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
TYPE
USB Single F5 iButton Holder
with Protective Cap
DS9490B#
APPLICATIONS
DS9490R# USB-to-1-Wire RJ11
#Denotes a RoHS-compliant device that may include lead(Pb) that is
exempt under the RoHS requirements.
. 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.
PACKAGING/SHIPPING
INFORMATION
The part is shipped individually in an antistatic
bag.
. 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.
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-to-
1-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
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
DS9490R/DS9490B
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
*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
PARAMETER
VALUE
-10°C to +85°C
95%
Temperature
Storage
Relative humidity, noncondensing
Duration
Storage
1yr (max) at 95%RH and +85°C
Operating
Operating
Temperature
0°C to +70°C
80%
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
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
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
C8
33pF
C7
33pF
12
GND
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
DS9490R/DS9490B
REVISION HISTORY
REVISION
PAGES
CHANGED
DESCRIPTION
DATE
5/03
Initial release
—
Added RoHS-compliant part numbers to the Ordering Information
table; replaced product graphics with product photos; changed
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
1/07
1, 2, 3, 5
Removed references to leaded packages in the Ordering Information
table; added the Revision History table
Deleted reference to monetary iButtons; added reference to the
Connectivity Matrix table in the DS1402x 1-Wire network cables data
sheet; revised description and URL for software drivers download
8/09
6/11
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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