Philips ISP1122A Product Data page 35

Philips Semiconductors
T PERIOD
+3.3 V
differential
data lines
0 V
T is the bit duration corresponding with the USB data rate.
PERIOD
Fig 15. Source differential data jitter.
T PERIOD
+3.3 V
differential
data lines
0 V
T is the bit duration corresponding with the USB data rate.
PERIOD
Full-speed timing symbols have a subscript prefix 'F', low-speed timings a prefix 'L'.
Fig 16. Source differential data-to-EOP transition skew and EOP width.
T PERIOD
+3.3 V
differential
data lines
0 V
T is the bit duration corresponding with the USB data rate.
PERIOD
Fig 17. Receiver differential data jitter.
9397 750 08958
Product data
crossover point
consecutive
transitions
N × T PERIOD + t DJ1
N × T PERIOD + t DJ2
crossover point
differential data to
SE0/EOP skew
N × T PERIOD + t DEOP
t JR
consecutive
transitions
N × T PERIOD + t JR1
N × T PERIOD + t JR2
Rev. 03 — 30 October 2001
crossover point
paired
transitions
crossover point
extended
t JR1
paired
transitions
ISP1122A
USB stand-alone hub
crossover point
MGR870
source EOP width: t EOPT
receiver EOP width: t EOPR
MGR776
MGR871
t JR2
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
35 of 48