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參數(shù)資料
| 型號： | 1430G5(NETLIGHT) |
| 英文描述： | Type SONET/SDH Long-Reach Transceivers with Clock Recovery |
| 中文描述： | 類型的SONET / SDH長距離收發(fā)器與時(shí)鐘恢復(fù) |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 222K |
| 代理商： | 1430G5(NETLIGHT) |
4
Agere Systems Inc.
Data Sheet, Rev 1.
August 2001
Long-Reach Transceivers with Clock Recovery
NetLight 1430G5 Type SONET/SDH
Application Information (continued)
Noise that couples into the receiver through the power
supply pins can also degrade performance. It is
recommended that the pi filter, shown in Figure 3, be
used for both the transmitter and receiver power
supplies.
Data, Clock, and Signal Detect Outputs
The data, clock, and signal detect outputs of the 1430
transceiver are driven by open-emitter NPN transistors,
which have an output impedance of approximately 7
.
Each output can provide approximately 50 mA maxi-
mum current to a 50
load terminated to VCC – 2.0 V.
Due to the high switching speeds of ECL outputs,
transmission line design must be used to interconnect
components. To ensure optimum signal fidelity, both
data outputs (RD+/RD–) and clock outputs
(CLK+/CLK–) should be terminated identically. The sig-
nal lines connecting the data clock outputs to the next
device should be equal in length and have matched
impedances. Controlled impedance stripline or micro-
strip construction must be used to preserve the quality
of the signal into the next component and to minimize
reflections back into the receiver, which could degrade
its performance. Excessive ringing due to reflections
caused by improperly terminated signal lines makes it
difficult for the component receiving these signals to
decipher the proper logic levels and can cause transi-
tions to occur where none were intended. Also, by min-
imizing high-frequency ringing, possible EMI problems
can be avoided.
The signal-detect output is LVTTL logic. A logic low at
this output indicates that the optical signal into the
receiver has been interrupted or that the light level has
fallen below the minimum signal detect threshold. This
output should not be used as an error rate indicator,
since its switching threshold is determined only by the
magnitude of the incoming optical signal.
Transceiver Processing
The transceiver and plug can withstand normal wave
soldering and aqueous spray cleaning processes.
However, the transceiver is not hermetic, and should
not be subjected to immersion in cleaning solvents.
The transceiver case should not be exposed to temper-
atures in excess of 125
°C. The fiber pigtail cannot
exceed 85
°C. The transceiver pins can be wave sol-
dered at 250
°C for up to 10 seconds.
Transceiver Optical and Electrical Characteristics
Table 2
. Transmitter Optical and Electrical Characteristics (TC = –40
°C to +85 °C; VCC = 3.135 V—3.465 V)
Parameter
Symbol
Min
Max
Unit
Average Optical Output Power L-1.1
PO
–5.0
0
dBm
Optical Wavelength L-1.1
λC
1280
1335
nm
Spectral Width
λ20
—1
nm
Side-mode Suppression Ratio
SMSR
30
—
dB
Dynamic Extinction Ratio
EXT
10
—
dB
Power Supply Current
ICCT
—200
mA
Input Data Voltage:
Low
High
VIL
VIH
VCC – 1.810
VCC – 1.165
VCC – 1.475
VCC – 0.880
V
Transmit Disable Voltage
VD
VCC – 1.165
VCC
V
Transmit Enable Voltage
VEN
VEE
VEE + 0.8
V
Laser Bias Voltage
VBIAS
00.70
V
Laser Back-facet Monitor Voltage
VBF
0.01
0.20
V
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