AFCT-5963TLZ Avago Technologies US Inc., AFCT-5963TLZ Datasheet - Page 2
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AFCT-5963TLZ
Manufacturer Part Number
AFCT-5963TLZ
Description
TXRX OPT SM SONET OC3/SDH 2X5
Manufacturer
Avago Technologies US Inc.
Series
METRAKr
Datasheet
1.AFCT-5963TGZ.pdf
(16 pages)
Specifications of AFCT-5963TLZ
Applications
General Purpose
Data Rate
155Mbps
Wavelength
1300nm
Voltage - Supply
3.1 V ~ 3.5 V
Connector Type
LC Duplex
Mounting Type
Through Hole
Data Rate Max
0.155Gbps
Supply Voltage
3.3V
Wavelength Typ
1300nm
Leaded Process Compatible
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Functional Description
Receiver Section
Design
The receiver section for the AFCT-5963TLZ/
TGZ/ATLZ/ATGZ/NLZ/NGZ contains an InGaAs/
InP photo detector and a preamplifier mounted
in an optical subassembly. This optical
subassembly is coupled to a postamp/decision
circuit on a circuit board. The design of the
optical assembly is such that it provides better
than 14 dB Optical Return Loss (ORL).
The postamplifier is ac coupled to t h e
preamplifier as illustrated in Figure 1. The
coupling capacitors are large enough to pass
the SONET/SDH test pattern at 155 Mb/s without
significant distortion or performance penalty.
If a lower signal rate, or a code which has
significantly more low frequency content is used,
sensitivity, jitter and pulse distortion could be
degraded.
Figure 1 also shows a filter function which
limits the bandwidth of the preamp output
signal. The filter is designed to bandlimit the
preamp output noise and thus improve the
receiver sensitivity.
Figure 1. Receiver Block Diagram
2
TRANS-
IMPEDANCE
PRE-
AMPLIFIER
GND
FILTER
AMPLIFIER
CIRCUIT
SIGNAL
DETECT
These components will reduce the sensitivity of
the receiver as the signal bit rate is increased
above 155 Mb/s.
Noise Immunity
The receiver includes internal circuit components
to filter power supply noise. However under
some conditions of EMI and power supply
noise, external power supply filtering may be
necessary (see Application Section).
The Signal Detect Circuit
The signal detect circuit works by sensing the
level of the received signal and comparing this
level to a reference. The SD output is +3.3 V
TTL.
LVPECL
OUTPUT
BUFFER
LVTTL
OUTPUT
BUFFER
DATA OUT
DATA OUT
SD