HFBR-59L1AGEZ Datasheet, PDF (10/13 Pages) AVAGO TECHNOLOGIES LIMITED – 1.25 GBd Ethernet and 1.0625 GBd Fibre Channel 850 nm SFF Low Voltage (3.3 V) Optical Transceiver

Table 9. Receiver Optical Characteristics
(T_C = -10°C to +85°C, V_CCT, R = 3.3 V ±10%)
Parameter
Symbol
Minimum Typical Maximum Unit
Notes
Optical Power
PIN
0
dBm
FC-PI Std
Receiver Sensitivity (Optical Input Power)
1.25 Gb/s
PRMIN
-17
dBm
Note 1
Min Optical Modulation Amplitude
(Peak-to-Peak)1.0625 Gb/s
OMA
31
PW
FC-PI Std
Note 2
Stressed Receiver Sensitivity
62.5 Pm fiber 1.25 Gb/s
62.5 Pm fiber 1.0625 Gb/s
50 Pm fiber 1.25 Gb/s
50 Pm fiber 1.0625 Gb/s
PRMIN
OMA
67
PRMIN
OMA
55
Note 3
dBm
Note 4
-12.5
PW
dBm
-13.5
PW
Return Loss
12
dB
FC-PI Std
Signal Detect - De-Assert
P_D
-31
-17.5
dBm
Note 5
Signal Detect - Assert
P_A
-17.0
dBm
Note 5
Signal Detect - Hysteresis
P_A - P_D
0.5
2.1
5
dB
Notes:
1. Sensitivity measurements are made at eye center with BER = 1E^-12.
2. An OMA of 31 is approximately equal to an average power of –17 dBm assuming an Extinction Ratio of 9 dB.
3. 1.25 Gb/s Stressed receiver vertical eye closure penalty (ISI) min is 2.2 dB for 50 μm fiber and 2.6 dB for 62.5 μm fiber. Stressed receiver DCD
component min (at TX) is 65 ps.
4. 1.0625 Gb/s Stressed receiver vertical eye closure penalty (ISI) min is 0.96 dB for 50 μm fiber and 2.18 dB for 62.5 μm fiber. Stressed receiver DCD
component min (at TX) is 80 ps.
5. These average power values are specified with an Extinction Ratio of 9 dB. The Signal Detect circuitry responds to OMA (peak-to-peak) power, not
to average power.
6. Please refer to the HFBR-59L1AL characterization report for typical values.
Table 10. Transmitter Timing Characteristics
(T_C = -10°C to +85°C, V_CCT, R = 3.3 V ±10%)
Parameter
Symbol
Minimum Typical Maximum Unit
TX Disable Assert Time
t_off
10
Ps
TX Disable Negate Time
t_on
1
ms
Time to Initialize
t_init
300
ms
TX Disable to Reset
t_reset
10
Ps
SD Assert Time
t_loss_on
100
Ps
SD De-assert Time
t_loss_off
100
Ps
Notes:
1. Time from rising edge of TX Disable to when the optical output falls below 10% of nominal.
2. Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal.
3. From power on or negation of TX Fault using TX Disable.
4. Time TX Disable must be held high to reset TX Fault.
5. Time from optical signal loss to SD assert. See transceiver timing diagrams.
6. Time from optical signal recovery to SD deassert. See transceiver timing diagrams.
Notes
1
2
3
4
5
6
10