QSFP28 LR4 Optical Transceiver 10km 100Gbps
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QSFP28 LR4 Optical Transceiver 10km 100GbpsDescription
Specification
Application
Order information
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Description
The QSFP28 LR4 Optical Transceiver integrates the transmit and receive path onto one module. On the transmit side, four lanes of serial data streams are recovered, retimed and passed on to four laser drivers, which control four electric absorption modulated lasers (EMLs) with 1296, 1300, 1305, and 1309 nm center wavelengths. The optical signals are then multiplexed into a single-mode fiber through an industry-standard LC connector. On the receive side, 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.
Product Features
- Duplex LC receptacle optical interface
- Single +3.3V power supply
- Hot-pluggableQSFP28 MSA form factor
- 4x25G Electrical Serial Interface
- Compliant with 4x28G(CEI-28G-VSR)
- AC coupling of CML signals
- Transmitter: cooled 4x25Gb/s LAN WDM EML TOSA (1295.56, 1300.05, 1304.58, 1309.14nm)
- Receiver: 4x25Gb/s PIN ROSA
- Low power dissipation(Max:6W)
- Built in digital diagnostic function
- Operating case temperature range:0℃to 70℃
- Compliant with 100GBASE-LR4
- I2C Communication Interface
Standards
- Compliant with IEEE 802.3ba
- Compliant with QSFP28MSA hardware specifications
- Compliant with RoHS
Functional Diagram

QSFP28 LR4 Optical Transceiver diagram
Specification
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
Parameter | Symbol | Min. | Typ | Max. | Unit | Note |
Data Rate | DR | 103.1 | Gb/s | |||
Supply Voltage | Vcc | 3.14 | 3.3 | 3.47 | V | |
Supply Current | Icc | 1.8 | A | |||
Operating Case Temp. | Tc | 0 | 70 | °C |
QSFP28 LR4 Optical Transceiver 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 | ||||
Transmitter | ||||||||||
Signaling rate per lane | DRPL | 25.78125 ± 100 ppm | Gb/s | |||||||
Differential input return loss (min) | RLd(f) | 9.5 – 0.37f, 0.01≤f<8 4.75 – 7.4log10(f/14), 8 ≤f<19 | dB | |||||||
Differential to common mode input
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 | % | |||||||
Eye width | Ew | 0.46 | UI | |||||||
Applied pk-pk sinusoidal jitter | Ppj | Per IEEE 802.3bm | ||||||||
Eye height | Eh | 95 | mV | |||||||
DC common mode voltage | DCv | -350 | 2850 | mV | ||||||
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 |
Notes:
1.20%~80%
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 | ||||
Transmitter | ||||||||||
Signaling rate, 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 | |||||||
Total launch power | Pout | dBm | 10.5 | |||||||
Average launch power, each lane | Pavg | dBm | -4.5 | 4.5 | 2,7 | |||||
Optical modulation amplitude, each lane (OMA) | OMA | dBm | -1.3 | 4.5 | ||||||
Extinction ratio | ER | dB | 4 | |||||||
Side-mode suppression ratio | SMSR | dB | 30 | |||||||
Average launch power of OFF
transmitter, per lane |
POFF | dBm | -30 | |||||||
Optical return loss tolerance | dB | 20 | ||||||||
Transmitter reflectance | dB | –12 | ||||||||
Transmitter eye mask {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | 3 | ||||||||
Receiver | ||||||||||
Receive Rate for Each Lane | Gb/s | 25.78125 ±100 ppm | 4 | |||||||
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 | 5,7 | |||||
Receiver Sensitivity(OMA)per lane | Psens1 | dBm | -10.6 | |||||||
Stressed Sensitivity(OMA) per lane | Psens2 | dBm | -6.8 | 6 | ||||||
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:
- Transmitter consists of 4 lasers operating at 25.78Gb/s each.
- Minimum value is informative.
- Hit ratio 5×10-5.
- Receiver consists of 4 photodetectors operating at 25.78Gb/s each.
- Minimum value is informative, equals min TxOMA with infinite ER and max channel insertion loss.
- SRS is measured with vertical eye closure penalty of 1.8 dB max, J2 of 0.30 UI, and J9 of 0.47 UI.
- Power value and power accuracy are with all channels on.
Application
- 100GBASE-LR4
- Infiniband QDR and DDR interconnects
- 100G Datacom connections
Recommended Power Supply Filter

QSFP28 LR4 Optical Transceiver 10km 100Gbps recommend circuit
Package Dimensions

QSFP28 LR4 Optical Transceiver size
Order information
Product Model | Descriptions | Inquiry |
---|---|---|
BD-QSFP28-CD10 | QSFP28 LR4 10km, 0~70℃, with Digital Diagnostic Monitor | Request Price |