參數(shù)資料
型號(hào): USB2513-AEZG
廠商: STANDARD MICROSYSTEMS CORP
元件分類(lèi): 總線控制器
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, QCC36
封裝: 6 X 6 MM, 0.50 MM PITCH, ROHS COMPLIANT, QFN-36
文件頁(yè)數(shù): 20/76頁(yè)
文件大?。?/td> 1924K
代理商: USB2513-AEZG
USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x
27
Revision 1.1 (04-26-10)
DATASHEET
5.3
Buffer Type Descriptions
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
Ground Pad / ePad
The package slug is the only VSS for the device and must be tied to ground
with multiple vias.
NC
No Connect
No signal or trace should be routed or attached to these pins.
Table 5.3 Buffer Type Descriptions
BUFFER
DESCRIPTION
I
Input.
I/O
Input/Output.
IPD
Input with internal weak pull-down resistor.
IPU
Input with internal weak pull-up resistor.
IS
Input with Schmitt trigger.
O12
Output 12 mA.
Table 5.2 USB251x Pin Descriptions (continued)
SYMBOL
BUFFER
TYPE
DESCRIPTION
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