HFBR-5903 Avago Technologies US Inc., HFBR-5903 Datasheet - Page 5

• Manufacturer Part Number: HFBR-5903
• Description: Fiber Optics, Transceiver Module
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-5903

• Data Rate Max: 125Mbps
• Wavelength Typ: 1300nm
• Connector Type: MT-RJ
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Application Information
The Applications Engineering group is available to
assist you with the technical understanding 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 these
parts.
Transceiver Optical Power Budget versus Link Length
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 transceiver specified in this data sheet at the
Beginning of Life (BOL). These curves represent the
attenuation and chromatic plus modal dispersion losses
associated with the 62.5/125 µm and 50/125 µm fiber
cables only. The area under the curves represents the
remaining OPB at any link length, which is available for
overcoming non-fiber cable related losses.
Avago Technologies LED technology has produced
1300 nm LED devices with lower aging characteristics
than normally associated with these technologies in
the industry. The industry convention is 1.5 dB aging
for 1300 nm LEDs. The Avago Technologies 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. Typical Optical Power Budget at BOL versus Fiber Optic
Cable Length.
5
12
10
8
6
4
2
0
0.3
FIBER OPTIC CABLE LENGTH (km)
0.5
HFBR-5903, 62.5/125 µm
1.0
HFBR-5903
50/125 µm
1.5
2.0
2.5
Figure 4 was generated with a Avago Technologies fiber
optic link model containing the current industry
conventions for fiber cable specifications and the FDDI
PMD and LCF-PMD optical parameters. These
parameters are reflected in the guaranteed
performance of the transceiver specifications in this
data sheet. This same model has been used extensively
in the ANSI and IEEE committees, including the ANSI
X3T9.5 committee, to establish the optical performance
requirements for various fiber optic interface standards.
The cable parameters used come from the ISO/IEC JTC1/
SC 25/WG3 Generic Cabling for Customer Premises per
DIS 11801 document and the EIA/TIA-568-A
Commercial Building Telecommunications Cabling
Standard per SP-2840.
Transceiver Signaling Operating Rate Range and BER
Performance
For purposes of definition, the symbol (Baud) rate, also
called signaling rate, is the reciprocal of the shortest
symbol time. Data rate (bits/sec) is the symbol rate
divided by the encoding factor used to encode the data
(symbols/bit).
When used in FDDI and ATM 100 Mb/s applications
the performance of the 1300 nm transceivers is
guaranteed over the signaling rate of 10 MBd to 125
MBd to the full conditions listed in individual product
specification tables.
Figure 5. Transceiver Relative Optical Power Budget at Constant
BER vs. Signaling Rate.
-0.5
2.5
1.5
0.5
-1
0
2
1
0
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/ 2.1 ns.
CONDITIONS:
1. PRBS 2 7 -1
2. DATA SAMPLED AT CENTER OF DATA SYMBOL.
3. BER = 10 -6
4. T A = +25 ˚C
5. V CC = 3.3 V dc
25
50
SIGNAL RATE (MBd)
75
100
125
150
175
200