HFBR-1115TZ Просмотр технического описания (PDF) - Avago Technologies
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HFBR-1115TZ Datasheet PDF : 12 Pages
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OPTICAL PORT
NC
9NC 8
GND
10NO PI7N
VCC
VCC
GND
11GND 6
12GND 5
13GND 4
DATA
14GND 3
DATA
15V 2
BB
NC
16NC 1
TRANSMITTER
Figure 3. Pinout drawing.
OPTICAL PORT
NC
9NC 8
NO PIN
10GND 7
GND
11V 6
CC
GND
12V 5
CC
GND
13V 4
CC
SD
14DATA3
SD
15DATA2
NO PIN
16NC 1
14
12
62.5/125 µm
10
8
6
50/125 µm
4
2
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
FIBER OPTIC CABLE LENGTH – km
RECEIVER
Figure 4. Optical power budget at BOL vs. fiber optic cable length.
The optical subassemblies consist of a transmitter subas-
sembly in which the LED resides and a receiver subassem-
bly housing the PIN-preamplifier combination.
The electrical subassemblies consist of a multi-layer
printed circuit board on which the IC chips and various
sufrace-mounted, passive circuit elements are attached.
Each transmitter and receiver package includes an internal
shield for the electrical subassembly to ensure low EMI
emissions and high immunity to external EMI fields.
The outer housing, including the ST* port, is molded
of filled, nonconductive plastic to provide mechanical
strength and electrical isolation. For other port styles,
please contact your Avago Technologies Sales Represen-
tative.
Each data-link module is attached to a printed circuit
board via the 16-pin DIP interface. Pins 8 and 9 provide
mechanical strength for these plastic-port devices and
will provide port-ground for forthcoming metal-port
modules.
Application Information
The Applications Engineering group of the Fiber Optics
Product Division is available to assist you with the technical
understanding and design tradeoffs associated with these
transmitter and receiver modules. 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 these parts.
Transmitter and Receiver Optical Power Budget versus
Link Length
The Optical Power Budget (OPB) is the available optical
power for a fiber-optic link to accommodate fiber cable
losses plus losses due to in-line connectors, splices,
optical switches, and to provide margin for link aging and
unplanned losses due to cable plant reconfiguration or
repair.
Figure 4 illustrates the predicted OPB associated with
the transmitter and receiver specified in this data sheet
at the Beginning of Life (BOL). This curve represents the
attenuation and chromatic plus modal dispersion losses
associated with 62.5/125 μm and 50/125 μm fiber cables
only. The area under the curve represents the remaining
OPB at any link length, which is available for overcoming
non-fiber cable related losses.
Avago LED technology has produced 1300 nm LED devices
with lower aging characteristics than normally associated
with these technologies in the industry. The industry con-
vention is 1.5 dB aging for 1300 nm LEDs; however, Avago
1300 nm LEDs will experience less than 1 dB of aging
over normal commercial equipment mission-life periods.
Contact your Avago Technologies sales representative for
additional details.
Figure 4 was generated with an Avago fiber-optic link
model containing the current industry conventions
for fiber cable specifications and the FDDI PMD optical
parameters.
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