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1430G5

NetLight ® 1430G5 Type SONET/SDH Long-Reach Transceivers with Clock Recovery

Agere -> LSI Corporation 

NetLight 1430G5 Type SONET/SDH

Long-Reach Transceivers with Clock Recovery

Data Sheet, Rev 1.

August 2001

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 Ω.

Each output can provide approximately 50 mA maxi-

mum current to a 50 Ω 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

Average Optical Output Power L-1.1

Optical Wavelength L-1.1

Spectral Width

Side-mode Suppression Ratio

Dynamic Extinction Ratio

Power Supply Current

Input Data Voltage:

Low

High

Transmit Disable Voltage

Transmit Enable Voltage

Laser Bias Voltage

Laser Back-facet Monitor Voltage

Symbol

PO

λC

∆λ20

SMSR

EXT

ICCT

Min

–5.0

1280

—

30

10

—

Max

0

1335

1

—

—

200

VIL

VIH

VD

VEN

VBIAS

VBF

VCC – 1.810 VCC – 1.475

VCC – 1.165 VCC – 0.880

VCC – 1.165

VCC

VEE

VEE + 0.8

0

0.70

0.01

0.20

Unit

dBm

nm

nm

dB

dB

mA

V

V

V

V

V

V

4

Agere Systems Inc.

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