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PDIUSBH12D Datasheet(PDF) 22 Page - NXP Semiconductors

No. de pieza PDIUSBH12D
Descripción Electrónicos  USB 2-port hub
PDF  28 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PDIUSBH12D Datasheet(HTML) 22 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
PDIUSBH12
USB 2-port hub
1999 Jul 22
22
CROSSOVER
POINT
CROSSOVER
POINT
CROSSOVER
POINT
SV00514
CROSSOVER
POINT
Hub Delay
Downstream
tHDD
Hub Delay
Upstream
tHDD
DOWNSTREAM
DIFFERENTIAL
DATA
UPSTREAM-
DIFFERENTIAL
DATA
UPSTREAM
DIFFERENTIAL
DATA
DOWNSTREAM-
DIFFERENTIAL
DATA
VDD
VSS
VSS
A. DOWNSTREAM HUB DELAY
B. UPSTREAM HUB DELAY
SOP DISTORTION
tSOP = tHDD(SOP) – tHDD (NEXT J)
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
tLHDD AND tLSOP
Figure 2. Hub Differential Data Delay and SOP distortion
UPSTREAM-
DIFFERENTIAL
DATA
DOWNSTREAM-
DIFFERENTIAL
DATA
VDD
VSS
VSS
A. DOWNSTREAM EOP DELAY
B. UPSTREAM EOP DELAY
EOP DELAY
tEOPD = tEOP–
EOP DELAY RELATIVE TO tHDD
tEOPDR = tEOPD – tHDD
EOP SKEW
tHESK = tEOP+ – tEOP–
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
tLEOPD, tLEOPDR, AND tLHESK
tEOP+
tEOP–
CROSSOVER
POINT
EXTENDED
CROSSOVER
POINT
EXTENDED
UPSTREAM
END OF CABLE
DOWNSTREAM
PORT
tEOP+
tEOP–
CROSSOVER
POINT
EXTENDED
CROSSOVER
POINT
EXTENDED
SV00515
Figure 3. Hub EOP Delay and EOP Skew



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