PDIUSBH11NB PHILIPS [NXP Semiconductors], PDIUSBH11NB Datasheet - Page 21

• Manufacturer Part Number: PDIUSBH11NB
• Description: Universal Serial Bus Hub
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1997 Aug 01
DIFFERENTIAL
DOWNSTREAM-
DIFFERENTIAL
UPSTREAM-
Universal Serial Bus Hub
DATA
DATA
V
V
V
V
V
V
DD
SS
SS
DD
SS
SS
UPSTREAM-
DIFFERENTIAL
DOWNSTREAM-
DIFFERENTIAL
DATA
DATA
A. DOWNSTREAM EOP DELAY
SOP DISTORTION
T
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
T
SOP
LHDD
A. DOWNSTREAM HUB DELAY
= T
AND T
HDD
(SOP) – T
LSOP
T
EOP–
CROSSOVER
HDD
POINT
Downstream
Hub Delay
T
(NEXT J)
EOP DELAY
T
EOP DELAY RELATIVE TO T
T
EOP SKEW
T
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
T
HDD
EOPD
EOPDR
HESK
LEOPD
Figure 2. Hub Differential Data Delay and SOP Distortion
= T
= T
, T
= T
T
EOP+
LEOPDR
EOP–
EOP+
EOPD
Figure 3. Hub EOP Delay and EOP Skew
– T
– T
CROSSOVER
EXTENDED
, AND T
EOP–
HDD
POINT
CROSSOVER
EXTENDED
POINT
LHESK
CROSSOVER
HDD
POINT
21
DOWNSTREAM
END OF CABLE
UPSTREAM
DOWNSTREAM
DIFFERENTIAL
UPSTREAM
DIFFERENTIAL
DATA
DATA
PORT
B. UPSTREAM EOP DELAY
B. UPSTREAM HUB DELAY
CROSSOVER
POINT
Hub Delay
T
Upstream
EOP–
T
HDD
T
PDIUSBH11
EOP+
Product specification
CROSSOVER
EXTENDED
CROSSOVER
POINT
CROSSOVER
EXTENDED
POINT
POINT
SV00515
SV00514