pdiusbh12 NXP Semiconductors, pdiusbh12 Datasheet - Page 21

• Manufacturer Part Number: pdiusbh12
• Description: Usb 2-port Hub
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC CHARACTERISTICS (AI/O pins, LOW speed)
1999 Jul 22
Driver characteristics
Driver Timings
Receiver Timings
Hub Timings
USB 2-port hub
SYMBOL
DIFFERENTIAL
DATA LINES
t
t
t
LEOPDR
t
t
LEOPR1
LEOPR2
t
V
LDEOP
t
t
LEOPT
LHESK
t
LHDD
LSOP
RFM
LCRS
t
t
t
t
lr
t
lf
PERIOD
f
Transition Time
Rise time
Rise time
Fall time
Fall time
Rise/fall time matching
Output signal crossover voltage
Source EOP width
Differential data to EOP transition skew
EOP Width at Receiver
Must reject as EOP
Must accept
Hub Differential Data Delay
Data bit width distortion after SOP
Hub EOP Delay Relative to T
Hub EOP Output Width Skew
PARAMETER
Figure 1. Differential data to EOP transition skew and EOP width
DIFFERENTIAL DATA TO
CROSSOVER POINT
N * t
SEO/EOP SKEW
PERIOD
HDD
+ t
DEOP
21
C
R
Between 10% and 90%
C
C
C
C
(t
Figure 1
Figure 1
Figure 1
Figure 1
Low Speed downstream port.
Figure 2
Figure 2
Figure 3
Figure 3
r
L
pu
L
L
L
L
/t
= 50pF and 350pF;
= 50pF
= 350pF
= 50pF
= 350pF
f
)
= 1.5k on D– to V
CROSSOVER POINT
EXTENDED
TEST CONDITIONS
CC
SOURCE EOP WIDTH: t
RECEIVER EOP WIDTH: t
–300
1.25
MIN
–40
330
675
–65
1.3
75
75
80
0
PDIUSBH12
EOPT
Product specification
EOPR1
MAX
+300
1.50
300
300
120
100
300
200
2.0
45
, t
SV00837
EOPR2
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
V
s