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參數(shù)資料
| 型號： | GL652 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | USB 7 PORT HUB CONTROLLER |
| 中文描述： | 7端口的USB集線器控制器 |
| 文件頁數(shù)： | 17/17頁 |
| 文件大?。?/td> | 190K |
| 代理商： | GL652 |
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'00/05/18
1. First Product Release
'00/04/05
Description
1. Seperate 4-port and 7-port hubs into different schematic files.
2. Omit the ganged mode pull-up resistor on 'SUSPND' pin.
3. Add a 10K pull-up resistor to 'RESET' pin.
4. Connect pin 1 of U3 to B_VCC, then regulator will be enabled
only when upstream port is plugged!
A 1M pull-low resistor is also added to disable this pin when
the upstream port is not plugged.
1.1
1.0
Date
Rev.
5. 'SELF' is directly connected to drain of Q4 to omit the external
debounce RC circuit for this pin.
7. Some resistor values are increased to save the operating current.
6. Q1 is replaced by a more popular and cheaper one -- FDN340P.
2. Remove the 47U output capacitor of MIC29302 to suppress inrush current.
3. Add R1, R6 and C6 for EMI suppressing.
4. Change C22, C26, C27, C30, C31, C34 and C35 from 100U to 120U for
better behavior in droop test.
6. Remove a redudant transistor in SELF-BUS power switching circuit.
5. Add a 2-transistor circuit for regulator ENABLE pin. That will save
several tens of mA operating current than direct connecting B_VCC
to ENABLE pin.
'00/08/17
1.2
1. Change the pull-up voltage source for each LED from B_VCC to power
switch output.
7. Change MIC29512 to 2 paralell MIC29302 for better driving capability.
1.2
CIRCUIT FOR GENESYS 7-PORT USB HUB
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Thursday, August 17, 2000
Title
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USBHUB.DSN
Rev
Date:
Sheet
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9. Application Circuits (4)
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| GL652USB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USB 7 PORT HUB CONTROLLER |
| GL6551 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:COMPANDER |
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