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Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved.
AV01-0152EN - July 11, 2013
Notes:
1. This is the maximum voltage that can be applied across the
Dierential Transmitter Data Inputs to prevent damage to the input
ESD protection circuit.
2. The outputs are terminated with 50 W connected to V
CC
- 2 V.
3. The power supply current needed to operate the transmitter is
provided to dierential ECL circuitry. This circuitry maintains a nearly
constant current ow from the power supply. Constant current
operation helps to prevent unwanted electrical noise from being
generated and conducted or emitted to neighboring circuitry.
4. This value is measured with the outputs terminated into 50 W
connected to V
CC
- 2 V and an Input Optical Power level of -14 dBm
average.
5. The power dissipation value is the power dissipated in the
transmitter and receiver itself. Power dissipation is calculated as the
sum of the products of supply voltage and currents, minus the sum
of the products of the output voltages and currents.
6. This value is measured with respect to V
CC
with the output
terminated into 50 W connected to V
CC
- 2 V.
7. The output rise and fall times are measured between 20% and 80%
levels with the output connected to V
CC
- 2 V through 50 W.
8. These optical power values are measured with the following
conditions:
• The Beginning of Life (BOL) to the Endof Life (EOL) optical power
degradation is typically 1.5 dB per the industry convention for
long wavelength LEDs. The actual degradation observed in
Avago Technologie’s 1300 nm LED products is < 1dB, as specied
in this data sheet.
• Over the specied operating voltage and temperature ranges.
• With 25 MBd (12.5 MHz square-wave), input signal.
• At the end of one meter of noted optical ber 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.
9. 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 25 MBd (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.
10. The transmitter will provide this low level of Output Optical Power
when driven by a logic “0” input. This can be useful in link trouble-
shooting.
11. The relationship between Full Width Half Maximum and RMS values
for Spectral Width is derived from the assumption of a Gaussian
shaped spectrum which results in a 2.35 X RMS = FWHM relationship.
12. The optical rise and fall times are measured from 10% to 90% when
the transmitter is driven by a 25 MBd (12.5 MHz square-wave) input
signal. The ANSI T1E1.2 committee has designated the possibility
of dening an eye pattern mask for the transmitter output optical
power as an item for further study. Avago will incorporate this
requirement into the specications for these products if it is dened.
The HFBR-1116TZ transmitter typically complies with the template
requirements of CCITT (now ITU-T) G.957 Section 3.25, Figure 2
for the STM-1 rate, excluding the optical receiver lter normally
associatd with single-mode ber measurements which is the likely
source for the ANSI T1E1.2 committee to follow in this matter.
13. Systematic Jitter contributed by the transmitter is dened as the
combination of Duty Cycle Distortion and Data Dependent Jitter.
Systematic Jitter is measured at 50% threshold using a 155.52, 2
7
- 1
pseudo-random bit stream data pattern input signal.
14. Random Jitter contributed the the transmitter is specied with a
155.52 MBd (77.5 MHz square-wave) input signal.
15. This specication is intended to indicate the performance of the
receiver when Input Optical Power signal characteristics are present
per the following denitions. The Input Optical Power dynamic
range from the minimum level (with a window timewidth) to the
maximum level is the range over which the receiver is guaranteed to
provide output data with a Bit-Error-Ratio (BER) better than or equal
to 2.5 x 10
-10
.
• At the Beginning of Life (BOL).
• Over the specied operating voltage and temperature ranges.
• Input is a 155.52 MBd, 2
23
- 1 PRBS data pattern with a 72 “1”s
and 72 “0”s inserted per the CCITT (now ITU-T) recommendation
G.958 Appendix 1.
• Receiver data window time-width is 1.23 ns or greater for the
clock recovery circuit to operate in. The actual test window time-
width is set to simulate the eect of worst-case input optical
jitter based on the transmitter jitter values from the specication
tables. The test window time-width is 3.32 ns.
16. All conditions of Note 15 apply except that the measurement is
made at the center of the symbol with no window time-width.
17. Systematic Jitter contributed by the receiver is dened as the
combination of Duty Cycle Distortion and Data Dependent Jitter.
The input optical power level is at the maximum of “P
IN
Min. (W).”
Systematic Jitter is measured at 50% threshold using a 155.52 MBd
(77.5 MHz square-wave), 2
7
- 1 pseudo-random bit stream data
pattern input signal.
18. Random Jitter contributed by the receiver is specied with a 155.52
MBd (77.5 MHz square-wave) input signal.
19. This value is measured during the transition from low to high levels
of input optical power.
20. This value is measured during the transition from high to low levels
of input optical power.
21. The Signal Detect output shall be asserted, logic-high (V
OH
), within
100 μs after a step increase of the Input Optical Power.
22. Signal Detect output shall be deasserted, logic-low (V
OL
), within 350
μs after a step decrease in the Input Optical Power.
23. The HFBR-1116TZ transmitter complies with the requirements for
the tradeos between center wavelength, spectral width, and rise/
fall times shown in Figure 9. This gure is derived from the FDDI
PMD standard (ISO/IEC 9314-3: 1990 and ANSI X3.166 – 1990) per
the description in ANSI T1E1.2 Revision 3. The interpretation of this
gure is that values of Center Wavelength and Spectral Width must
lie along the appropriate Optical Rise/Fall Time curve.
24. This value is measured with an output load RL = 10 kW.
