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參數(shù)資料
| 型號： | HFCT-6001D |
| 英文描述： | 622 Mb/s Single Mode Fiber Transceiver for ATM, SONET OC-12/SDH STM-4(應(yīng)用于ATM, SONET OC-12/SDH STM-4的622 Mb/s單模式光收發(fā)器) |
| 中文描述： | 622 Mb / s的對ATM，SONET的OC-12/SDH的STM - 4單模光纖收發(fā)器（應(yīng)用于自動取款機(jī)，SONET的OC-12/SDH的STM - 4的622 Mb / s的單模式光收發(fā)器） |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 177K |
| 代理商： | HFCT-6001D |
4
Maintain a solid, low inductance
ground plane for returning signal
currents to the power supply.
Multilayer plane printed circuit
board is best for distribution of
V
CC
, returning ground currents,
forming transmission lines and
shielding. Also, it is important to
suppress noise from influencing
the fiber-optic transceiver
performance, especially the
receiver and the clock recovery
circuits. Proper power supply
filtering of V
CC
for this
transceiver is accomplished by
using the recommended, separate
filter circuits shown in Figure 4.
These filter circuits suppress V
CC
noise of 50 mV peak-to-peak or
less over a broad frequency
range. This prevents receiver
sensitivity degradation as well as
false-lock or loss-of-lock in the
clock recovery circuitry due to
V
CC
noise. It is recommended
that surface-mount components
be used. Use tantalum capacitors
for the 10 μF capacitors and
monolithic, ceramic bypass
capacitors for the 0.1 μF
capacitors. Also, it is
recommended that a surface-
mount coil inductor of 1 μH be
used. Ferrite beads can be used
to replace the coil inductors
when using quieter V
CC
supplies,
but a coil inductor is
recommended over a ferrite bead.
Coils with a low, series dc
resistance (<0.7
) and high,
Self-resonating frequency are
recommended. All power supply
components need to be placed
physically next to the V
CC
pins of
the receiver and transmitter. Use
a good, uniform ground plane
with a minimum number of holes
to provide a low-inductance
ground current return for the
power supply currents.
In addition to these
recommendations, Hewlett-
Packard’s Application
Engineering staff is available for
consulting on best layout
practices with various vendors
mux/demux, clock generator and
clock recovery circuits. HP has
participated in several reference
design studies and is prepared to
share the findings of these
studies with interested
customers. Contact your local HP
sales representative to arrange
for this service.
Figure 4. Recommended Circuit Schematic
Rx
Tx
NO INTERNAL
CONNECTION
NO INTERNAL
CONNECTION
HFCT-6001
TOP VIEW
Rx
V
EE
18
RD
17
RD
16
SD
15
Rx
V
CC
14
Tx
V
CC
13
TD
12
TD
11
Tx
V
EE
10
REF CLK
1
LCK
REF
2
CLK
3
CLK
4
L
MON
(-)
5*
L
MON
(+)
6*
Tx
DIS
7*
R
X
P
MON
8*
T
X
P
MON
9*
R8
RD
RD
TERMINATE
AT THE
DEVICE
INPUTS
SD
C3
C4
LOCATE
FILTER
AT V
CC
PINS
R15
V
CC
C2
C1
L1
L2
V
CC
R5
R7
C6
R4
V
CC
R2
R3
R1
C5
TD
TERMINATE AT
FIBER-OPTIC
TRANSCEIVER
INPUTS
TD
NOTES:
THE SPLIT-LOAD TERMINATIONS FOR PECL SIGNALS NEED TO BE LOCATED AT THE INPUT OF DEVICES
RECEIVING THOSE PECL SIGNALS.
R1 = R4 = R6 = R8 = R10 = R12 = R14 = 130
R2 = R3 = R5 = R7 = R9 = R11 = R13 = 82
C1 = C2 = C3 = C5 = C6 = C7 = 0.1 μF.
C4 = C8 = 10 μF.
L1 = L2 = 1 μH COIL.
R15 = 10 k
FOR THE SINGLE MODE HFCT-6001 TRANSCEIVER, PINS 5 - 9 ARE USED FOR LASER DIODE BIAS AND
OPTICAL POWER MONITORING AS WELL AS TO PROVIDE A TRANSMITTER DISABLE FUNCTION. *FOR THE
MULTIMODE HFBR-5207 TRANSCEIVER, PINS 5 - 9 ARE NOT USED.
OPTIONAL
R6
R14
REF
R13
C7
R12
R11
R9
R10
CLK
CLK
V
CC
TERMINATE
AT CLOCK
INPUTS
C8
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