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PDIUSBH12 数据表(PDF) 21 Page - NXP Semiconductors

部件名 PDIUSBH12
功能描述  USB 2-port hub
PDF  28 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

PDIUSBH12 数据表(HTML) 21 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
PDIUSBH12
USB 2-port hub
1999 Jul 22
21
AC CHARACTERISTICS (AI/O pins, LOW speed)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Driver characteristics
CL = 50pF and 350pF;
Rpu = 1.5kΩ on D– to VCC
Transition Time
Between 10% and 90%
t
Rise time
CL = 50pF
75
ns
tlr
Rise time
CL = 350pF
300
ns
t f
Fall time
CL = 50pF
75
ns
tlf
Fall time
CL = 350pF
300
ns
tRFM
Rise/fall time matching
(tr/tf)
80
120
%
VLCRS
Output signal crossover voltage
1.3
2.0
V
Driver Timings
tLEOPT
Source EOP width
Figure 1
1.25
1.50
µs
tLDEOP
Differential data to EOP transition skew
Figure 1
–40
100
ns
Receiver Timings
EOP Width at Receiver
tLEOPR1
Must reject as EOP
Figure 1
330
ns
tLEOPR2
Must accept
Figure 1
675
ns
Hub Timings
Low Speed downstream port.
tLHDD
Hub Differential Data Delay
Figure 2
300
ns
tLSOP
Data bit width distortion after SOP
Figure 2
–65
45
ns
tLEOPDR
Hub EOP Delay Relative to THDD
Figure 3
0
200
ns
tLHESK
Hub EOP Output Width Skew
Figure 3
–300
+300
ns
SV00837
tPERIOD
DIFFERENTIAL
DATA LINES
CROSSOVER POINT
CROSSOVER POINT
EXTENDED
DIFFERENTIAL DATA TO
SEO/EOP SKEW
N * tPERIOD + tDEOP
SOURCE EOP WIDTH: tEOPT
RECEIVER EOP WIDTH: tEOPR1, tEOPR2
Figure 1. Differential data to EOP transition skew and EOP width



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