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參數(shù)資料
| 型號： | OQ2541BHP |
| 英文描述： | CLOCK/DATA RECOVERY|BIPOLAR|QFP|48PIN|PLASTIC |
| 中文描述： | 時鐘/數(shù)據(jù)恢復(fù)|雙極| QFP封裝| 48PIN |塑料 |
| 文件頁數(shù)： | 8/40頁 |
| 文件大?。?/td> | 292K |
| 代理商： | OQ2541BHP |
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2000 Sep 18
8
Philips Semiconductors
Product specification
SDH/SONET data and clock recovery unit
STM1/4/16 OC3/12/48 GE
OQ2541BHP; OQ2541BU
handbook, full pagewidth
2
R1
6.8
1 k
1
k
1
μ
F
L1
(1)
4.5 V
β
≈
100
100 nF
3.3
nF
MGT205
BAND GAP
REFERENCE
VEE
PC
GND
off chip
on chip
Fig.6 Schematic diagram of OQ2541B power control loop.
(1) L1 = RF choke type Murata BLM21 or equivalent.
If the outputs are AC coupled, the formulae for calculating
the required voltage on pin AREF and the value of the
resistor connected between pins AREF and V
EE
are as
follows:
and:
where R1 = 500
, R2 = 16 k
and V
EE
=
3.3 V.
To maintain a single-ended swing of 200 mV (p-p) across
a 50
AC-coupled load, the voltage on pin AREF must be
)
50
This can be achieved by connecting a 7.3 k
resistor
between pins AREF and V
EE
.
handbook, halfpage
MGL667
500
16 k
RAREF
VEE
AREF
off chip
on chip
VAREF
GND
Fig.7 Functionality of pin AREF.
V
AREF
R
--------------------
R
+
R
L
O
–
0.5V
swing
×
=
R
AREF
R1
V
AREF
V
1
–
×
1
R2
V
1
–
×
–
-------------------------------V
=
100 mV
–
-50 + 100
×
300 mV
–
=
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| OQ2541HP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET data and clock recovery unit STM1/4/16 OC3/12/48 GE |
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