The 100G QSFP28 LR4 optical receiver integrates receive path onto one module. The receiver four lanes of optical data streams are optically demultiplexed by an integrated optical demultiplexer. Each data steam is recovered by a PIN photodetector and transimpedance amplifier, retimed, and passed on to an output driver. This module features a hot-pluggable electrical interface, low power consumption, and 2-wire serial interface.
Features
Absolute Maximum Ratings
| Parameter | Symbol | Min. | Max. | Unit | Note |
| Supply Voltage | Vcc | -0.5 | 3.6 | V | |
| Storage Temperature | TS | -40 | 85 | °C | |
| Relative Humidity | RH | 0 | 85 | % | |
| Rx Damage Threshold,per Lane | PRdmg | 5.5 | | dBm | |
Note: Stress in excess of the maximum absolute ratings can cause permanent damage to the transceiver.
Recommended Operating Conditions
Electrical Characteristics (Top=0~70℃, Vcc=3.14~3.47V)
(Tested under recommended operating conditions,unless otherwise noted)
| Parameter | Symbol | Min | Typ | Max | Unit | Notes |
| Receiver |
| Signaling rate per lane | DRPL | 25.78125 ± 100 ppm | Gb/s | |
| Differential data output swing | Vout,pp | 400 | | 800 | mV | |
| Eye width | Ew | 0.57 | | | UI | |
| Vertical eye closure | | | | 5.5 | dB | |
| Differential output return loss (min) | RLd(f) | 9.5 – 0.37f, 0.01≤f<8 4.75 – 7.4log10(f/14), 8 ≤f<19 | dB | |
| Common to differential mode conver- sion return loss (min) | RLdc(f) | 22-20(f/25.78), 0.01≤f<12.89 15-6(f/25.78), 12.89≤f<19 | dB | |
| Differential termination mismatch | Tm | | | 10 | % | |
| Transition time, 20% to 80% | Tr,Tf | 12 | | | ps | |
Optical Characteristics (Top=0~70℃, Vcc=3.14~3.47V)
(Tested under recommended operating conditions,unless otherwise noted)
| Parameter | Symbol | Unit | Min | Typ | Max | Notes |
| Receiver |
| Receive Rate for Each Lane | | Gb/s | 25.78125 ±100 ppm | 1 |
| Four Lane Wavelength Range | λ1 | nm | 1294.53 | 1295.56 | 1296.59 | |
| λ2 | 1299.02 | 1300.05 | 1301.09 | |
| λ3 | 1303.54 | 1304.58 | 1305.63 | |
| λ4 | 1308.09 | 1309.14 | 1310.19 | |
| Overload Input Optical Power | Pmax | dBm | 5.5 | | | |
| Average Receive Power for Each Lane | Pin | dBm | -10.6 | | 4.5 | 2,4 |
| Receiver Sensitivity(OMA)per lane | Psens1 | dBm | | | -10.6 | |
| Stressed Sensitivity(OMA) per lane | Psens2 | dBm | | | -6.8 | 3 |
| Return Loss | RL | dB | -26 | | | |
| Receiver Electrical 3dB upper cutoff frequency, per lane | | GHz | | | 31 | |
| Los De-Assert | Pd | dBm | | | -11.6 | |
| Los Assert | Pa | dBm | -23.6 | | | |
| Loss Hysteresis | Pd-Pa | dBm | | 2 | | |
Notes:
1. Receiver consists of 4 photodetectors operating at 25.78Gb/s each.
2. Minimum value is informative, equals min TxOMA with infinite ER and max channel insertion loss.
3. SRS is measured with vertical eye closure penalty of 1.8 dB max, J2 of 0.30 UI, and J9 of 0.47 UI.
4. Power value and power accuracy are with all channels on..
| Pin | Name | Logic | Description | |
| 1 | GND | | Ground | 1 |
| 2 | Tx2n | CML-I | NC | 10 |
| 3 | Tx2p | CML-I | NC | 10 |
| 4 | GND | | Ground | 1 |
| 5 | Tx4n | CML-I | NC | 10 |
| 6 | Tx4p | CML-I | NC | 10 |
| 7 | GND | | Ground | 1 |
| 8 | ModSelL | LVTTL-I | Module Select | 3 |
| 9 | ResetL | LVTTL-I | Module Reset | 4 |
| 10 | Vcc Rx | | +3.3V Power Supply Receiver | 2 |
| 11 | SCL | LVCMOS-I/O | 2-wire serial interface clock | 5 |
| 12 | SDA | LVCMOS-I/O | 2-wire serial interface data | 5 |
| 13 | GND | | Ground | 1 |
| 14 | Rx3p | CML-O | Receiver Non-Inverted Data Output | 9 |
| 15 | Rx3n | CML-O | Receiver Inverted Data Output | 9 |
| 16 | GND | | Ground | 1 |
| 17 | Rx1p | CML-O | Receiver Non-Inverted Data Output | 9 |
| 18 | Rx1n | CML-O | Receiver Inverted Data Output | 9 |
| 19 | GND | | Ground | 1 |
| 20 | GND | | Ground | 1 |
| 21 | Rx2n | CML-O | Receiver Inverted Data Output | 9 |
| 22 | Rx2p | CML-O | Receiver Non-Inverted Data Output | 9 |
| 23 | GND | | Ground | 1 |
| 24 | Rx4n | CML-O | Receiver Inverted Data Output | 9 |
| 25 | Rx4p | CML-O | Receiver Non-Inverted Data Output | 9 |
| 26 | GND | | Ground | 1 |
| 27 | ModPrsL | LVTTL-O | Module Present | 6 |
| 28 | IntL | LVTTL-O | Interrupt | 7 |
| 29 | Vcc Tx | | +3.3V Power supply transmitter | 2 |
| 30 | Vcc1 | | +3.3V Power supply | 2 |
| 31 | LPMode | LVTTL-I | Low Power Mode | 8 |
| 32 | GND | | Ground | 1 |
| 33 | Tx3p | CML-I | NC | 10 |
| 34 | Tx3n | CML-I | NC | 10 |
| 35 | GND | | Ground | 1 |
| 36 | Tx1p | CML-I | NC | |
| 37 | Tx1n | CML-I | NC | 10 |
| 38 | GND | | Ground | 1 |
FAQ
Q1. Can I have a sample order for this product?
A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.
Q2. What about the lead time?
A:Sample needs 3-6 days, mass production time needs 1-2 weeks for order quantity more than
Q3. Do you have any MOQ limit for sample order?
A: Low MOQ, 1pc for sample checking is available
Q4. How do you ship the goods and how long does it take to arrive?
A: We usually ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive. Airline and sea shipping are also optional.
