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LPC47M14X датащи(PDF) 180 Page - SMSC Corporation

номер детали LPC47M14X
подробное описание детали  128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
PDF  205 Pages
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производитель  SMSC [SMSC Corporation]
домашняя страница  http://www.smsc.com
Logo SMSC - SMSC Corporation

LPC47M14X датащи(HTML) 180 Page - SMSC Corporation

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SMSC DS – LPC47M14X
Page 180
Rev. 03/19/2001
Differential
Data Lines
10%
Rise Time
90%
Fall Time
tF
tR
10%
90%
VCRS
FIGURE 10 – DATA SIGNAL RISE AND FALL TIME
Full Speed: 4 to 20ns at CL = 50pF
TxD+
TxD-
Rs
Rs
C
L
C
L
Full-Speed Buffer
Note: The output impedance of the buffer with a series resistance
(Rs) is 28
Ω to 44Ω.
FIGURE 11 – FULL SPEED LOAD
TxD+
TxD-
Rs
Rs
C
L
C
L
Low-Speed Buffer
15K
15K
Low-Speed upstream port load
CL = 50pF to 150pF
TxD+
TxD-
Rs
Rs
C
L
C
L
Low-Speed Buffer
3.6V
1.5K
Low-Speed Downstream port load
CL = 200pF to 600pF
FIGURE 12 – LOW-SPEED PORT LOADS
Data Line
Crossover
Point
50%Point of
Initial Swing
VSS
VSS
Driver End
of Cable
Round Trip
Cable Delay
80ns (max)
Receiver
End of Cable
One Way
Cable
Delay
30ns
(max)
FIGURE 13 – CABLE DELAY



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