- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370029 > 20H04 (SMSC Corporation) 4-PORT USB2.0 HUB CONTROLLER PDF資料下載
參數(shù)資料
| 型號： | 20H04 |
| 廠商： | SMSC Corporation |
| 英文描述： | 4-PORT USB2.0 HUB CONTROLLER |
| 中文描述： | 4端口USB2.0集線器控制器 |
| 文件頁數(shù)： | 8/38頁 |
| 文件大小： | 919K |
| 代理商： | 20H04 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
4-Port USB2.0 Hub Controller
Datasheet
Revision 1.63 (10-14-04)
Page 8
SMSC USB20H04
DATASHEET
Chapter 1
General Description
The USB20H04 four-port hub controller is fully compliant with the USB2.0 Specification and does not
require firmware development. When connected to a high-speed host, the four downstream facing ports
can operate at low-speed (1.5Mb/s), full-speed (12Mb/s), or high-speed (480Mb/s). As required by the
USB2.0 Specification, the USB20H04 is fully backward compatible with legacy full-speed hosts. A
dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture
ensures maximum USB throughput for each connected device when operating with mixed-speed
peripherals.
The USB20H04 supports both bus-powered and self-powered configurations. For self-powered operation,
an external supply is used to power the downstream facing ports. In bus-powered mode, all power is
derived from the upstream facing port and no external power supply is required. An external USB power
distribution switch device is used to control V
BUS
switching to downstream ports, and to limit current and
sense over-current conditions.
A default configuration is available in the USB20H04 following a reset. This configuration may be sufficient
for some applications when it is desired to save the expense of an EEPROM. The controller may also be
configured from a microcontroller or an external EEPROM. When using the microcontroller interface, the
USB20H04 appears as an SMBus slave device. The EEPROM interface supports a 2-wire I
C device.
All required resistors on the USB ports are integrated into the USB20H04. This includes all series
termination resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D–
pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors.
Throughout this document the upstream facing port of the hub will be referred to as the upstream port, and
the four downstream facing ports will be called the downstream ports.
1.1
Applications
The Universal Serial Bus (USB) hub may be used in a number of applications:
Standalone hubs
Keyboards
Monitors
Motherboard hubs
Docking stations and port replicators
Printers and scanners
External storage devices
Auxiliary battery docks
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 20N60BD1 | HiPerFAST IGBT with Diode |
| 20N60B | HiPerFAST IGBT |
| 20S207DA4 | VACUUM FLUORESCENT DISPLAY MODULE |
| 20SVP150M | OS-CON SVP series |
| 20SVP22M | SVP series |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 20H07-660 | 功能描述:保險絲 20AMP 660VAC/250VDC RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類型:SMD/SMT 系列:485 |
| 20H07C | 功能描述:保險絲 20A CANADIAN RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類型:SMD/SMT 系列:485 |
| 20H07CB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Fuse |
| 20H18A | 制造商: 功能描述: 制造商:TE Connectivity / Deutsch 功能描述: 制造商:undefined 功能描述: |
| 20H-20F | 制造商:Panasonic Industrial Company 功能描述:CABLE |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。