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USB2512BI-AEZG 参数 Datasheet PDF下载

USB2512BI-AEZG图片预览
型号: USB2512BI-AEZG
PDF下载: 下载PDF文件 查看货源
内容描述: USB 2.0高速集线器控制器 [USB 2.0 Hi-Speed Hub Controller]
分类和应用: 外围集成电路控制器PC时钟
文件页数/大小: 72 页 / 1689 K
品牌: SMSC [ SMSC CORPORATION ]
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USB 2.0 Hi-Speed Hub Controller  
Datasheet  
Table 5.2 USB251x Pin Descriptions (continued)  
BUFFER  
TYPE  
SYMBOL  
DESCRIPTION  
SEL48  
I
48 MHz Clock Input Selection  
48 MHz external input clock select. When the hub is clocked from an external  
clock source, this pin selects either 24 MHz or 48 MHz mode.  
‘0’ = 24 MHz  
‘1’ = 48 MHz  
POWER, GROUND, and NO CONNECTS  
CRFILT  
VDD Core Regulator Filter Capacitor  
This pin must have a 1.0 μF (or greater) ±20% (ESR <0.1 Ω) capacitor to  
VSS.  
VDD33  
3.3 V Power  
PLLFILT  
PLL Regulator Filter Capacitor  
This pin must have a 1.0 μF (or greater) ±20% (ESR <0.1 Ω) capacitor to  
VSS.  
VSS  
NC  
Ground Pad / ePad  
The package slug is the only VSS for the device and must be tied to ground  
with multiple vias.  
No Connect  
No signal or trace should be routed or attached to these pins.  
5.3  
Buffer Type Descriptions  
Table 5.3 Buffer Type Descriptions  
DESCRIPTION  
BUFFER  
I
Input.  
Input/Output.  
I/O  
IPD  
IPU  
IS  
Input with internal weak pull-down resistor.  
Input with internal weak pull-up resistor.  
Input with Schmitt trigger.  
O12  
Output 12 mA.  
SMSC USB251x  
27  
Revision 1.0 (3-11-09)  
DATASHEET