AFCT-5963NLZ Avago Technologies US Inc., AFCT-5963NLZ Datasheet - Page 8
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AFCT-5963NLZ
Manufacturer Part Number
AFCT-5963NLZ
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-5963NLZ
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
Figure 6b. Recommended ac coupled interface circuit
The AFCT-5963TLZ/TGZ/ATLZ/ATGZ/NLZ/NGZ
have a transmit disable function which is a
single-ended +3.3 V TTL input which is dc-
coupled to pin 8.
As for the receiver section, it is internally ac-
coupled between the preamplifier and the
postamplifier stages. The actual Data and Data-
bar outputs of the postamplifier are dc-coupled
to their respective output pins (pins 4, 5). The
two data outputs of the receiver should be
terminated with identical load circuits.
Signal Detect is a single-ended, +3.3 V TTL
output signal that is dc-coupled to pin 3 of the
module. Signal Detect should not be ac-coupled
externally to the follow-on circuits because of its
infrequent state changes.
Power Supply Filtering and Ground Planes
It is important to exercise care in circuit board
layout to achieve optimum performance from
these transceivers. Figures 6a and 6b show the
power supply circuit which complies with the
small form factor multisource agreement. It is
8
T
Note: C1 = C2 = C3 = 10 nF or 100 nF
Note A: CIRCUIT ASSUMES OPEN EMITTER OUTPUT
Note B: WHEN INTERNAL BIAS IS PROVIDED REPLACE SPLIT RESISTORS WITH 100 W TERMINATION
* C4 AND C5 ARE OPTIONAL BYPASS CAPACITORS FOR ADDITIONAL LOW FREQUENCY NOISE FILTERING.
DIS
T
R
X
X
(LVTTL)
10
1
9
2
8
3
7
82 Ω
130 Ω
4
130 Ω
V
6
CC
5
(+3.3 V)
82 Ω
130 Ω
130 Ω
C2
C1
100 nF
1 µH
1 µH
100 nF
100 nF
100 nF
100 nF
C5 *
10 µF
C4 *
10 µF
further recommended that a continuous ground
plane be provided in the circuit board directly
under the transceiver to provide a low inductance
g r o u n d f o r s i g n a l r e t u r n c u r r e n t . T h i s
recommendation is in keeping with good high
frequency board layout practices.
Package footprint and front panel considerations
The Avago Technologies transceivers comply with
the circuit board “Common Transceiver Footprint”
hole pattern defined in the current multisource
agreement which defined the 2 x 5 package style.
This drawing is reproduced in Figure 7 with the
addition of ANSI Y14.5M compliant dimensioning
to be used as a guide in the mechanical layout
of your circuit board. Figure 8 shows the front
panel dimensions associated with such a layout.
Eye Safety Circuit
For an optical transmitter device to be eye-safe
in the event of a single fault failure, the transmitter
must either maintain eye-safe operation or be
disabled.
Z = 50 Ω
Z = 50 Ω
Z = 50 Ω
Z = 50 Ω
Z = 50 Ω
V
CC
C3
(+3.3 V)
100 nF
10 µF
130 Ω
82 Ω
130 Ω
V
CC
82 Ω
130 Ω
(+3.3 V)
RD+
TD-
TD+
RD-
SD
130
Ω
LVTTL
V
CC
V
(+3.3 V)
CC
(+3.3 V)
NOTE A
NOTE B