參數(shù)資料
型號: PDIUSBH11A
廠商: NXP Semiconductors N.V.
英文描述: Universal Serial Bus hub(通用串行總線集線器)
中文描述: 通用串行總線集線器(通用串行總線集線器)
文件頁數(shù): 21/28頁
文件大?。?/td> 157K
代理商: PDIUSBH11A
Philips Semiconductors
Product specification
PDIUSBH11A
Universal Serial Bus Hub
1999 Jul 22
21
SV00837
t
PERIOD
DIFFERENTIAL
DATA LINES
CROSSOVER POINT
CROSSOVER POINT
EXTENDED
DIFFERENTIAL DATA TO
SEO/EOP SKEW
N * t
PERIOD
+ t
DEOP
SOURCE EOP WIDTH: t
EOPT
RECEIVER EOP WIDTH: t
EOPR1
, t
EOPR2
Figure 1. Differential data to EOP transition skew and EOP width
CROSSOVER
POINT
CROSSOVER
POINT
CROSSOVER
POINT
SV00514
CROSSOVER
POINT
Hub Delay
Downstream
t
HDD
Hub Delay
Upstream
t
HDD
DOWNSTREAM
DIFFERENTIAL
DATA
UPSTREAM-
DIFFERENTIAL
DATA
UPSTREAM
DIFFERENTIAL
DATA
DOWNSTREAM-
DIFFERENTIAL
DATA
V
DD
V
SS
V
SS
A. DOWNSTREAM HUB DELAY
B. UPSTREAM HUB DELAY
SOP DISTORTION
t
SOP
= t
HDD
(SOP) – t
HDD
(NEXT J)
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
t
LHDD
AND t
LSOP
Figure 2. Hub Differential Data Delay and SOP distortion
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