參數(shù)資料
型號(hào): PDIUSBH12
廠商: NXP Semiconductors N.V.
英文描述: USB 2-port hub
中文描述: 2的USB端口集線器
文件頁數(shù): 20/28頁
文件大小: 170K
代理商: PDIUSBH12
Philips Semiconductors
Product specification
PDIUSBH12
USB 2-port hub
1999 Jul 22
20
AC CHARACTERISTICS (AI/O pins, FULL speed)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Driver characteristics
C
L
= 50pF;
R
pu
= 1.5k
on D+ to V
CC
Transition Time:
Rise time
Fall time
Rise/fall time matching
t
r
t
f
Between 10% and 90%
4
4
90
20
20
110
ns
ns
%
t
RFM
V
CRS
(t
r
/t
f
)
Output signal crossover voltage
1.3
2.0
V
Driver Timings
t
EOPT
t
DEOP
Source EOP width
Figure 1
160
175
ns
Differential data to EOP transition skew
Figure 1
–2
5
ns
Receiver Timings
Receiver Data Jitter Tolerance
To next transition
For paired transitions
EOP Width at Receiver
Must reject as EOP
Must accept
t
JR1
t
JR2
Characterized and not tested.
Guaranteed by design.
–18.5
–9
18.5
9
ns
ns
t
EOPR1
t
EOPR2
Figure 1
40
82
ns
ns
Hub Timings
Full Speed downstream port.
t
HDD
t
SOP
t
EOPDR
t
HESK
Hub Differential Data Delay
Figure 2
40
ns
Data bit width distortion after SOP
Figure 2
–5
3
ns
Hub EOP Delay Relative to t
HDD
Hub EOP Output Width Skew
Figure 3
0
15
ns
Figure 3
–15
+15
ns
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