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參數(shù)資料
| 型號： | UPD72012CU-XXX |
| 廠商： | NEC Corp. |
| 英文描述： | HUB CONTROLLER FOR UNIVERSAL SERIAL BUS |
| 中文描述： | 集線器控制器通用串行總線 |
| 文件頁數(shù)： | 25/36頁 |
| 文件大?。?/td> | 414K |
| 代理商： | UPD72012CU-XXX |
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Data Sheet S13918EJ3V0DS
25
μ
PD72012
AC Characteristics (V
DD
= 3.3 V +0.3 V, T
A
= 0 to +70
°
C)
(1) Full-speed output driver characteristics
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Output rise time (FS)
Output fall time (FS)
t
FR
, t
FF
UD0, UD1
C
L
= 50 pF, T
A
= 25
°
C,
10% to 90%
4
20
ns
Crossover output voltage
V
CRS
1.3
2.0
V
Driver output resistance
Z
DRV
28
44
Full-speed data rate
t
FDRATE
12Mbps
±
0.25%
11.97
12.03
Mbps
t
DJ1
Continuous transition
±
3.5
ns
Differential driver jitter (FS)
t
DJ2
Pair transition
±
4.0
ns
Source jitter on SE0 transition from
differential transition (FS)
t
FDEOP
–2
+5
ns
t
JR1
Continuous transition
±
18.5
ns
Receiver jitter (FS)
t
JR2
Pair transition
±
9
ns
One-way propagation delay
t
FPROP
26
ns
EOP source SE0 interval
t
FEOPT
160
175
ns
EOP receiver SE0 interval
t
FEOPR
Accept as effective EOP.
82
ns
SE0 time interval on differential
transition
t
FST
14
ns
(2) HUB repeater characteristics (Full-speed)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Output rise time (LS)
Output fall time (LS)
t
r
, t
f
D10 to D50, D11 to D51
C
L
= 50 pF, T
A
= 25
°
C,
10% to 90%
4
20
ns
t
HDD1
With cable
70
ns
Differential data delay (LS)
t
HDD2
Without cable
44
ns
t
HDJ1
Continuous transition
±
3
ns
Differential driver jitter (LS)
t
HDJ2
Pair transition
±
1
ns
Data bit length distortion after SOP
(LS)
t
FSOP
+5
ns
HUB EOP delay for t
HDD1
t
FEOPD
0
15
ns
EOP output width skew (LS)
t
FHESK
±
15
ns
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