HFCT-5962ATG Avago Technologies US Inc., HFCT-5962ATG Datasheet - Page 7
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HFCT-5962ATG
Manufacturer Part Number
HFCT-5962ATG
Description
Manufacturer
Avago Technologies US Inc.
Datasheet
1.HFCT-5962ATG.pdf
(17 pages)
Specifications of HFCT-5962ATG
Optical Fiber Type
TX/RX
Data Transfer Rate
155Mbps
Optical Rise Time
2ns
Optical Fall Time
2ns
Operating Temperature Classification
Industrial
Peak Wavelength
1360/1580nm
Package Type
DIP With Connector
Operating Supply Voltage (min)
3.1V
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.5V
Output Current
50mA
Operating Temp Range
-40C to 85C
Mounting
Snap Fit To Panel
Pin Count
20
Lead Free Status / RoHS Status
Compliant
Application Information
The Applications Engineering Group at Avago Tech-
nologies is available to assist you with technical under-
standing and design trade-offs associated with these
transceivers. You can contact them through your Avago
Technologies sales representative.
The following information is provided to answer some
of the most common questions about the use of the
parts.
Optical Power Budget and Link Penalties
The worst-case Optical Power Budget (OPB) in dB for a
fiber-optic link is determined by the difference between
the minimum transmitter output optical power (dBm
avg) and the lowest receiver sensitivity (dBm avg). This
OPB provides the necessary optical signal range to es-
tablish a working fiber-optic link. The OPB is allocated
for the fiber-optic cable length and the corresponding
link penalties. For proper link performance, all penalties
that affect the link performance must be accounted for
within the link optical power budget.
Figure 6a. Recommended dc coupled interface circuit
7
B
T
P
P
V
B
Note: C1 = C2 = C3 = 10 nF or 100 nF
Note A: THE BIAS RESISTOR FOR VpdR SHOULD NOT EXCEED 200 W
* C4 AND C5 ARE OPTIONAL BYPASS CAPACITORS FOR ADDITIONAL
LOW FREQUENCY NOISE FILTERING.
T
R
DIS
MON
MON
MON
CC
MON
X
X
RX (+3.3 V)
(LVTTL)
NOTE A
+
-
+
-
200 W
20 19 18 17 16 15 14 13 12 11
1
2
3
10 nF
4
5
6
7
8
TRANSCEIVER INPUTS
9 10
TERMINATE AT
130 W
100 W
130 W
C1
C2
1 µH
1 µH
Electrical and Mechanical Interface
Recommended Circuit
Figures 6a and 6b show recommended dc and ac
coupled circuits for deploying the Avago Technologies
transceivers in +3.3 V systems.
Data Line Interconnections
Avago Technologies’ HFCT-5962TL/TG/NL/NG/ATL/ATG
fiber-optic transceivers are designed to couple to +3.3 V
PECL signals. The transmitter driver circuit regulates the
output optical power. The regulated light output will
maintain a constant output optical power provided the
data pattern is reasonably balanced in duty cycle. If the
data duty cycle has long, continuous state times (low
or high data duty cycle), then the output optical power
will gradually change its average output optical power
level to its preset value.
C5 *
10 µF
C4 *
10 µF
Z = 50 W
Z = 50 W
Z = 50 W
Z = 50 W
Z = 50 W
V
CC
C3
(+3.3 V)
10 µF
130 W
100 W
DEVICE INPUTS
TERMINATE AT
130 W
82 W
V
CC
130 W
(+3.3 V)
TD-
TD+
RD+
RD-
SD
PHY DEVICE
V
LVPECL
CC
LVPECL
V
CC
(+3.3 V)
(+3.3 V)