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參數(shù)資料
| 型號： | DS9490R |
| 英文描述： | USB to 1-Wire/iButton Adapter |
| 中文描述： | USB至1-Wire/iButton適配器 |
| 文件頁數(shù)： | 5/5頁 |
| 文件大?。?/td> | 216K |
| 代理商： | DS9490R |
DS9490
5 of 5
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 V
BUS
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
EMI Filter
VBUS
D-
D+
GND
VIN
EN
N/C
VOUT
GND
LP2980IM5-3.3
PMOD
NC
NC
NC
VB
SUSO
D-
D+
NC
OW
NC
GND
VD
NC
NC
NC
X1
X0
NC
VPP
NC
NC
NC
NC
DS2490
C2
1.0uF
EMI Filter
C3
4.7
R2 24
R3 24
R1
1.5K
C1
0.1uF
OW
GND
DS2401
OW
GND
DS9503
USB
Connector
C6
33pF
C5
33pF
X1
12Mhz
L1
L2
C7
33pF
C8
33pF
U1
U2
U3
U4
J2
1
2
1
2
J1
1
2
3
4
1
3
4
5
2
1
5
7
8
12
24
19
20
17
10
1
2
3
4
5
6
Female RJ11
DS9490R
DS9490B
1
2
iButton Socket
J3
6
5
3
1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS9490R# | 功能描述:界面模塊 USB:1-Wire/iButton Adapter RoHS:否 制造商:4D Systems 產(chǎn)品:Serial Converters 通道/端口數(shù)量: 數(shù)據(jù)速率: 接口類型:USB, UART 工作電源電壓:3.3 V, 5 V 最大工作溫度: |
| DS9490R_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:USB to 1-Wire/iButton Adapters High-Speed 12Mbps Universal Serial Bus (USB) Interface |
| DS9490R-E00 | 功能描述:界面模塊 RoHS:否 制造商:4D Systems 產(chǎn)品:Serial Converters 通道/端口數(shù)量: 數(shù)據(jù)速率: 接口類型:USB, UART 工作電源電壓:3.3 V, 5 V 最大工作溫度: |
| DS9502 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:ESD Protection Diode |
| DS9502P | 功能描述:TVS二極管陣列 RoHS:否 制造商:Littelfuse 極性: 通道:4 Channels 擊穿電壓: 鉗位電壓:11.5 V 工作電壓:2.5 V 峰值浪涌電流:20 A 安裝風(fēng)格:SMD/SMT 端接類型:SMD/SMT 系列: 最小工作溫度:- 40 C 最大工作溫度:+ 85 C |
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