HFBR-5903 Avago Technologies US Inc., HFBR-5903 Datasheet - Page 15

• 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

Notes:
1.
2.
3.
4.
5a. The power dissipation of the transmitter is calculated as the
5b. The power dissipation of the receiver is calculated as the sum
6.
7.
8.
9.
10. Random Jitter contributed by the receiver is specified with an
11. These optical power values are measured with the following
12. The Extinction Ratio is a measure of the modulation depth of
This is the maximum voltage that can be applied across the
Differential Transmitter Data Inputs to prevent damage to the
input ESD protection circuit.
The outputs are terminated with 50 Ω connected to V
The power supply current needed to operate the transmitter is
provided to differential ECL circuitry. This circuitry maintains a
nearly constant current flow from the power supply. Constant
current operation helps to prevent unwanted electrical noise
from being generated and conducted or emitted to
neighboring circuitry.
This value is measured with the outputs terminated into 50 Ω
connected to
V
sum of the products of supply voltage and current.
of the products of supply voltage and currents, minus the sum
of the products of the output voltages and currents.
This value is measured with respect to V
terminated into 50 Ω connected to V
The output rise and fall times are measured between 20% and
80% levels with the output connected to V
Duty Cycle Distortion contributed by the receiver is measured
at the 50% threshold using an IDLE Line State,
125 MBd (62.5 MHz square-wave), input signal. The input optical
power level is
-20 dBm average. See Application Information - Transceiver
Jitter Section for further information.
Data Dependent Jitter contributed by the receiver is specified
with the FDDI DDJ test pattern described in the FDDI PMD
Annex A.5. The input optical power level is -20 dBm average.
See Application Information - Transceiver Jitter Section for
further information.
IDLE Line State, 125 MBd (62.5 MHz square-wave), input signal.
The input optical power level is at maximum “P
Application Information - Transceiver Jitter Section for further
information.
conditions:
• The Beginning of Life (BOL) to the End of Life (EOL) optical
• Over the specified operating voltage and temperature
• With HALT Line State, (12.5 MHz square-wave), input signal.
• At the end of one meter of noted optical fiber with cladding
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. Please consult with your local
Avago Technologies sales representative for further details.
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
CC
power degradation is typically 1.5 dB per the industry
convention for long wavelength LEDs. The actual
degradation observed in Avago Technologies’ 1300 nm LED
products is < 1 dB, as specified in this data sheet.
ranges.
modes removed.
- 2 V and an Input Optical Power level of -14 dBm average.
CC
CC
CC
with the output
- 2 V.
-2 V through 50 Ω.
IN Min.
(W)”. See
CC
-2 V.
13. The transmitter provides compliance with the need for
14. This parameter complies with the FDDI PMD requirements for
15. This parameter complies with the optical pulse envelope from
16. Duty Cycle Distortion contributed by the transmitter is
17. Data Dependent Jitter contributed by the transmitter is
18. Random Jitter contributed by the transmitter is specified with
19. This specification is intended to indicate the performance of the
“0” level compared to the optical power at the “1” level
expressed as a percentage or in decibels.
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.
the trade-offs between center wavelength, spectral width, and
rise/fall times shown in Figure 11.
the FDDI PMD shown in Figure 12. 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.
measured at a 50% threshold using an IDLE Line State,
125 MBd (62.5 MHz square-wave), input signal. See Application
Information - Transceiver Jitter Performance Section of this data
sheet for further details.
specified with the FDDI test pattern described in FDDI PMD
Annex A.5. See Application Information - Transceiver Jitter
Performance Section of this data sheet for further details.
an IDLE Line State, 125 MBd (62.5 MHz square-wave), input
signal. See Application Information - Transceiver Jitter
Performance Section of this data sheet for further details.
receiver section of the transceiver when Input Optical Power
signal characteristics are present per the following definitions.
The Input Optical Power dynamic range from the minimum level
(with a window time-width) to the maximum level is the range
over which the receiver is guaranteed to provide output data
with a Bit Error Rate (BER) better than or equal to 2.5 x 10
• At the Beginning of Life (BOL)
• Over the specified operating temperature and voltage ranges
• Input symbol pattern is the FDDI test pattern defined in FDDI
• Receiver data window time-width is 2.13 ns or greater and
To test a receiver with the worst case FDDI PMD Active Input
jitter condition requires exacting control over DCD, DDJ and RJ
jitter components that is difficult to implement with production
test equipment. The receiver can be equivalently tested to the
worst case FDDI PMD input jitter conditions and meet the
minimum output data window time-width of 2.13 ns. This is
accomplished by using a nearly ideal input optical signal (no
DCD, insignificant DDJ and RJ) and measuring for a wider
window time-width of 4.6 ns. This is possible due to the cumula-
tive effect of jitter components through their superposition
(DCD and DDJ are directly additive and RJ components are rms
additive). Specifically, when a nearly ideal input optical test
signal is used and the maximum receiver peak-to-peak jitter
contributions of DCD (0.4 ns), DDJ (1.0 ns), and RJ (2.14 ns) exist,
the minimum window time-width becomes 8.0 ns -0.4 ns - 1.0 ns
- 2.14 ns = 4.46 ns, or conservatively 4.6 ns. This wider window
PMD Annex A.5 with 4B/5B NRZI encoded data that contains a
duty cycle base-line wander effect of 50 kHz. This sequence
causes a near worst case condition for inter-symbol
interference.
centered at mid-symbol. This worst case window time-width
is the minimum allowed eye-opening presented to the FDDI
PHY PM_Data indication input (PHY input) per the example
in FDDI PMD Annex E. This minimum window time-width of
2.13 ns is based upon the worst case FDDI PMD Active Input
Interface optical conditions for peak-to-peak DCD (1.0 ns),
DDJ (1.2 ns) and RJ (0.76 ns) presented to the receiver.
-10
.