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AFBR-5803Z
Broadcom Corporation
AFBR-5803Z Datasheet PDF : 19 Pages
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AFBR-5803Z/5803TZ/5803AZ/5803ATZ
Data Sheet
Transceiver Optical Characteristics
(AFBR-5803Z/AFBR-5803TZ: TA = 0°C to +70°C, VCC = 3.135V to 3.5V or 4.75V to 5.25V.)
(AFBR-5803AZ/AFBR-5803ATZ: TA = –10°C to +85°C, VCC = 3.135V to 3.5V or 4.75V to 5.25V.)
Parameter
Symbol
Min.
Typ.
Max.
Units
Figure
Note
Output Optical Power
BOL
PO
–19
—
–14
dBm avg.
a
62.5/125 μm, NA = 0.275 Fiber EOL
–20
Output Optical Power
BOL
PO
–22.5
—
–14
dBm avg.
a
50/125 μm, NA = 0.20 Fiber
EOL
–23.5
Optical Extinction Ratio
—
—
10
%
b
–10
dB
Output Optical Power at Logic “0” State
PO (“0”)
—
—
–45
dBm avg.
c
Center Wavelength
C
1270
1308
1380
nm
d
Spectral Width
FWHMS
nm RMS
12
d
—
147
—
nm
—
63
—
nm
Optical Rise Time
tr
0.6
1.9
3.0
ns
12, 13
d, e
Optical Fall Time
tf
0.6
1.6
3.0
ns
12, 130
d, e
Duty Cycle Distortion Contributed by the
DCD
—
—
0.6
ns p-p
f
Transmitter
Data Dependent Jitter Contributed by the DDJ
—
—
0.6
ns p-p
g
Transmitter
Random Jitter Contributed by the
RJ
—
—
0.69
ns p-p
h
Transmitter
a. These optical power values are measured with the following conditions:
— The Beginning of Life (BOL) to the End of Life (EOL) optical power degradation is typically 1.5 dB per the industry convention for long wavelength LEDs.
The actual degradation observed in Broadcom 1300-nm LED products is < 1 dB, as specified in this data sheet.
— Over the specified operating voltage and temperature ranges.
— With HALT Line State, (12.5-MHz square-wave), input signal.
— At the end of one meter of noted optical fiber with cladding modes removed.
The average power value can be converted to a peak power value by adding 3 dB. Higher output optical power transmitters are available on special request.
b. The Extinction Ratio is a measure of the modulation depth of the optical signal. The data “0” output optical power is compared to the data “1” peak output
optical power and expressed as a percentage. With the transmitter driven by a HALT Line State (12.5-MHz square-wave) signal, the average optical power is
measured. The data “1” peak power is then calculated by adding 3 dB to the measured average optical power. The data “0” output optical power is found by
measuring the optical power when the transmitter is driven by a logic “0” input. The extinction ratio is the ratio of the optical power at the “0” level compared
to the optical power at the “1” level expressed as a percentage or in decibels.
c. The transmitter provides compliance with the need for Transmit_Disable commands from the FDDI SMT layer by providing an Output Optical Power level of
< –45 dBm average in response to a logic “0” input. This specification applies to either 62.5/125-μm or 50/125-μm fiber cables.
d. This parameter complies with the FDDI PMD requirements for the trade-offs between center wavelength, spectral width, and rise/fall times shown in
Figure 12.
e. This parameter complies with the optical pulse envelope from the FDDI PMD shown in Figure 13. The optical rise and fall times are measured from 10% to
90% when the transmitter is driven by the FDDI HALT Line State (12.5-MHz square-wave) input signal.
f. Duty Cycle Distortion contributed by the transmitter is measured at a 50% threshold using an IDLE Line State, 125 MBd (62.5-MHz square-wave), input signal.
See Transceiver Jitter Performance for further details.
g. Data Dependent Jitter contributed by the transmitter is specified with the FDDI test pattern described in FDDI PMD Annex A.5. See Transceiver Jitter
Performancet for further details.
h. Random Jitter contributed by the transmitter is specified with an IDLE Line State, 125 MBd (62.5-MHz square-wave), input signal. See Transceiver Jitter
Performance for further details.
Broadcom
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