AFCT-5964NGZ Avago Technologies US Inc., AFCT-5964NGZ Datasheet - Page 8

• Manufacturer Part Number: AFCT-5964NGZ
• Description: TXRX OPT SM SONET OC3/SDH 2X10
• Manufacturer: Avago Technologies US Inc.
• Series: METRAKr

Specifications of AFCT-5964NGZ

• Applications: General Purpose
• Data Rate: 115Mbps
• 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-5964TLZ/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 13. In addition these devices
offer the designer the option of monitoring the
laser diode bias current and the laser diode
optical power. The voltage measured between
pins 17 and 18 is proportional to the bias
current through an internal 10 Ω resistor.
Similarly the optical power rear facet monitor
circuit provides a photo current which is
proportional to the voltage measured between
pins 19 and 20, this voltage is measured across
an internal 200 Ω resistor.
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 9, 10).
The two data outputs of the receiver should be
terminated with identical load circuits.
output signal that is dc-coupled to pin 8 of
8
B
T
B
P
P
V
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 Ω TERMINATION
Note C: THE BIAS RESISTOR FOR VpdR SHOULD NOT EXCEED 200 Ω
* C4 AND C5 ARE OPTIONAL BYPASS CAPACITORS FOR ADDITIONAL LOW FREQUENCY NOISE FILTERING.
T
R
Signal Detect is a single-ended, +3.3 V TTL
DIS
MON
MON
MON
CC
MON
X
X
RX (+3.3 V)
(LVTTL)
NOTE C
+
-
+
-
200
20 19 18 17 16 15 14 13 12 11
1
2
3
10 nF
4
5
6
7
8
9 10
V
130
82
CC
130
(+3.3 V)
82
130
130
C1
C2
100 nF
1 µH
1 µH
100 nF
100 nF
100 nF
100 nF
C5 *
10 µF
C4 *
10 µF
the module. Signal Detect should not be ac-
coupled externally to the follow-on circuits
because of its infrequent state changes.
The designer also has the option of monitoring
the PIN photo detector bias current. Figure 6b
shows a resistor network, which could be used
to do this. Note that the photo detector bias
current pin must be connected to V
Technologies also recommends that a decoupling
capacitor is used on this pin.
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 further recommended that a
continuous ground plane be provided in the
circuit board directly under the transceiver to
provide a low inductance ground for signal
return current. This recommendation is in
keeping with good high frequency board layout
practices.
Z = 50
Z = 50
Z = 50
Z = 50
Z = 50
V
CC
C3
(+3.3 V)
10 µF
100 nF
130
82
130
V
CC
130
82
(+3.3 V)
RD+
TD-
TD+
RD-
SD
130
LVTTL
V
CC
V
(+3.3 V)
CC
(+3.3 V)
CC
. Avago
NOTE A
NOTE B