HFBR-7924EWZ Datasheet, PDF (8/17 Pages) AVAGO TECHNOLOGIES LIMITED – Four-Channel Pluggable Parallel Fiber Optic Transceiver Part of the Avago Technologies METRAK family

Receiver Electrical Characteristics
(Over recommended operating conditions: Tc= 0ºC to +80ºC, Vcc=3.3V + 5%)
Parameter
Symbol Minimum
Differential Output Impedance
Data Output Differential
Peak-to-Peak Voltage Swing
Z_OUT
DV_DOUTP-P 500
Inter-channel Skew
Data Output Rise, Fall Time
t_r, t_f
Control I/O
Output Voltage Low
V_OL
V_EE
Signal Detect
Output Voltage High
LVTTL & LVCMOS
V_OH
2.4
Compatible
Assert Time (OFF-to-ON) t_SDA
De-assert Time (ON-to-OFF) t_SDD
Typical
100
650
50
120
50
50
Maximum Unit
W
800
mV_P-P
100
ps
150
ps
0.4
V
V_CC
V
µs
µs
Reference
13, Figure 9
14, Figure 10
15
16
I_OL = 4.0 mA
I_OH = -0.5 mA
17
18
Receiver Optical Characteristics
(Over recommended operating conditions: Tc= 0ºC to +80ºC, Vcc=3.3V + 5%)
Parameter
Symbol Minimum Typical Maximum Unit
Reference
Input Optical Power - Sensitivity
P_{IN MIN}
-18
-16.0
dBm avg.
19
Input Optical Power - Saturation
Operating Center Wavelength
P_{IN MAX}
-2.0
l_C
830
dBm avg.
860
nm
Stressed Receiver Sensitivity
-11.7
dBm
20
Stressed Receiver Eye Opening
111
ps
21
Return Loss
12
dB
22
Signal Detect
Asserted
P_A
-22
-17
dBm avg.
23
Deasserted
P_D
-31
-27
dBm avg.
Hysteresis
P_A - P_D
0.5
1.0
dB
Notes:
13. Measured over the range 4 MHz to 2 GHz.
14. DV_DoutP-P = DV_DoutH - DV_DoutL, where DV_DoutH = High State Differential Data Output Voltage and DV_DoutL = Low State Differential Data Output
Voltage. DV_DoutH and DV_DoutL = V_Dout+ - V_Dout-, measured with a 100 W differential load connected with the recommended coupling capaci-
tors and with a 2500 MBd, 101010 pattern.
15. Inter-channel Skew is defined for the condition of equal amplitude, zero ps skew input signals.
16. Rise and Fall Times are measured between the 20% and 80% levels using a 550 MHd square wave signal.
17. The Signal Detect output will change from logic “0” (Low) to “1” (High) within the specified assert time for a step transition in optical input
power from the deasserted condition to the specified asserted optical power level.
18. The Signal Detect output will change from logic “1” (High) to “0” (Low) within the specified de-assert time for a step transition in optical input
power from the specified asserted optical power level to the deasserted condition.
19. Sensitivity is defined as the average input power with the worst case, minimum, Extinction Ratio necessary to produce a BER < 10^-12 at the
center of the Baud interval. For this parameter, input power is equivalent to that provided by an ideal source, i.e. one with RIN and switching
attributes that do not degrade the sensitivity measurement. All channels not under test are operating receiving data with an average input
power of up to 6 dB above P_{IN MIN}. Sensitivity at signal rates from 1 to 2.7 GBd is defined for a PRBS 2²³-1 test pattern.
20. The stressed receiver sensitivity is measured using 2.6 dB Inter-Symbol Interference, ISI, (min), 30 ps Duty Cycle Dependent Deterministic Jit-
ter, DCD DJ (min) and 6 dB ER (ER Penalty = 2.23 dB). All channels not under test are operating receiving data with an average input power of
up to 6 dB, above P_{IN MIN.}
21. The stressed receiver eye opening is measured using 2.6 dB ISI (min), 30 ps DCD DJ (min), 6 dB ER (ER Penalty = 2.23 dB) and an average input
optical power of -11.7 dBm. All channels not under test are operating receiving data with an average input power of up to 6 dB above P_IN
MIN^.
22. Return loss is defined as the ratio, in dB, of the received optical power to the optical power reflected back down the fiber.
23. Signal Detect assertion requires all optical inputs to exhibit a minimum 6 dB Extinction Ratio at Pa = -17 dBm. All channels not under test are op-
erating with PRBS 223-1patterns, asynchronous with the channel under test, and average input power of up to 6 dB above the specified P_IN
MIN.