HFCT-5006 Avago Technologies US Inc., HFCT-5006 Datasheet - Page 8

• Manufacturer Part Number: HFCT-5006
• Description: Fiber Optics, Evaluation Kit
• Manufacturer: Avago Technologies US Inc.

Specifications of HFCT-5006

• Silicon Core Number: HFCT-5954xxxZ, AFCT-5961xxxZ, AFCT-5964xxxZ
• Kit Contents: OC-3/OC-12 LC Evaluation Board, Associated Technical Literature
• Main Purpose: Interface, Fiber Optics
• Embedded: No
• Utilized Ic / Part: HFCT-595x, AFCT-596x
• Primary Attributes: SFF LC Singlemode for SONET/SDH, ATM Applications
• Operating Voltage: 3.14 V to 3.47 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Details

Figure 6b. Recommended ac Coupled Interface Circuit
The AFCT-5961TLZ/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 postampli-
fier are dc-coupled to their respective output pins (pins
4, 5). The two data outputs of the receiver should be ter-
minated with identical load circuits.
Signal Detect is a single-ended, +3.3 V PECL compatible
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 transceiv-
ers. 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
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 W
130 W
4
130 W
V
6
CC
5
(+3.3 V)
82 W
130 W
130 W
C2
C1
100 nF
1 µH
1 µH
100 nF
100 nF
100 nF
100 nF
C5 *
10 µF
C4 *
10 µF
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.
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.
The AFCT-5961TLZ/TGZ/ATLZ/ATGZ/NLZ/NGZ is intrinsi-
cally eye safe and does not require shut down circuitry.
Z = 50 W
Z = 50 W
Z = 50 W
Z = 50 W
Z = 50 W
V
CC
C3
(+3.3 V)
100 nF
100 nF
10 µF
130 W
82 W
130 W
V
130 W
82 W
CC
(+3.3 V)
V
CC
82 W
130 W
(+3.3 V)
RD+
TD-
TD+
RD-
SD
130
W
LVPECL
V
CC
V
(+3.3 V)
CC
(+3.3 V)
NOTE A
NOTE B