|
|
PDF DS9490R Data sheet ( Hoja de datos )
| Número de pieza | DS9490R | |
| Descripción | USB to 1-Wire/iButton Adapter | |
| Fabricantes | Dallas Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de DS9490R (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
|
No Preview Available !
www.maxim-ic.com
DS9490R/DS9490B
USB to 1-Wire/iButton Adapter
FEATURES
§ 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
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
www.DatmaSihseseito4Un.ecodmand 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.
TYPICAL OPERATING CIRCUIT
PC USB
DS9490B iButton
PC USB DS9490R
DS1402D-DR8
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 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
Dallas Semiconductor.
Blue Dot is a trademark of Dallas Semiconductor.
Windows is a registered trademark of Micosoft Corp.
1 of 5
050503
1 page  
ELECTRICAL CHARACTERISTICS
DS9490
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
D-
D+
GND
1
2
3
4
EMI Filter L1
EMI Filter L2
J1
C2
1.0uF
www.DataSheet4U.com
LP2980IM5-3.3
1 VIN
3 EN
4 N/C
VOUT
GND
5
C3
4.7
2
U1
R1
1.5K
R2 24
R3 24
C7
33pF
C8
33pF
C1
0.1uF
DS2490
1
PMOD
NC
NC
5 NC
VB
7 SUSO
D-
8 D+
NC
10 OW
12
NC
GND
U2
VD
NC
NC
NC
X1
X0
NC
VPP
NC
NC
NC
NC
24
19
20
17
DS2401 U3
OW 2
1
GND
DS9503
6
1
OW
5 GND 2
U4
1
X1
12Mhz
3
C6
33pF
C5
33pF
Female RJ11
1
2
3
4
5
6
J2
DS9490R
iButton Socket
1
2
J3
DS9490B
5 of 5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet DS9490R.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS9490B | USB to 1-Wire/iButton Adapter | Dallas Semiconductor |
| DS9490R | USB to 1-Wire/iButton Adapter | Dallas Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |