Ascent’s 100G QSFP28 LR4 Optical Transceiver offers service providers, network operators 100 Gigabit Ethernet connectivity options for data center networking, enterprise core aggregation, and service provider transport applications. It integrates receiver and transmitter path on one module. In the transmit side, four lanes of serial data streams are recovered, retimed, and passed to four laser drivers. The laser drivers control 4 × Distributed Feedback Laser (DFB) with center wavelengths of 1296 nm, 1300 nm, 1305 nm, and 1309 nm. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. In the receive side, the four lanes of optical data streams are optically de-multiplexed by the integrated optical de-multiplexer. Each data stream is recovered by a PIN photo-detector and trans-impedance amplifier, retimed. This module features a hot-pluggable electrical interface, low power consumption and MDIO management interface. This product is designed with form factor, optical/electrical connections, and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA) and compliant with IEEE802.3ba-2010 and 802.3bm.
· Compliant with 100GBASE‑LR4
· Support line rates up to 103.125 Gbps
· Integrated LAN WDM TOSA / ROSA for up to 10 km reach over SMF
· Digital Diagnostics Monitoring Interface
· Duplex LC optical receptacle
· No external reference clock
· Electrically hot-pluggable
· Compliant with QSFP28 MSA with LC connector
· Compatible with SONET OC-192, SDH STM-64
· Power dissipation < 4 W
· RoHS compliant
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Storage Temperature | Ts | -40 | - | 85 | °C | |
Relative Humidity | RH | 5 | - | 95 | % | |
Power Supply Voltage | VCC | -0.3 | - | 4 | V | |
Signal Input Voltage | Vcc-0.3 | - | Vcc+0.3 | V |
Recommended Operating Conditions
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Case Operating Temperature | Tcase | 0 | - | 70 | °C | QSFP-28-100G-LP-10 |
-10 | - | 85 | °C | QSFP-28-100G-LP-10E | ||
Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
Power Supply Current | ICC | 1010 | mA | QSFP-28-100G-LP-10 | ||
1150 | mA | QSFP-28-100G-LP-10E | ||||
Data Rate | BR | 25.78125 | Gbps | Each channel | ||
Transmission Distance | TD | - | 10 | km | ||
Coupled fiber | Single-mode fiber | 9/125 µm SMF |
Optical Characteristics
Parameter | Symbol | Min | Typ. | Max | Unit | Notes |
Transmitter | ||||||
Signaling Speed per Lane | 25.78125 ± 100 ppm | Gbps | ||||
Wavelength Assignment | λ0 | 1294.53 | 1295.56 | 1296.59 | nm | |
λ1 | 1299.02 | 1300.05 | 1301.09 | nm | ||
λ2 | 1303.54 | 1304.58 | 1305.63 | nm | ||
λ3 | 1308.09 | 1309.14 | 1310.19 | nm | ||
Total Output Power | POUT | 10.5 | dBm | |||
Transmit OMA per Lane | -1.3 | 4.5 | dBm | |||
Average Launch Power per Lane | -4.3 | 4.5 | dBm | |||
SMSR | 30 | dB | ||||
Optical Extinction Ratio | ER | 4 | dB | |||
Average launch Power off per lane | Poff | -30 | dBm | |||
RIN | RIN | -130 | dB/Hz | |||
Output Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | 1 | ||||
Receiver | ||||||
Signaling Speed per Lane | 25.78125 ± 100 ppm | Gbps | ||||
Wavelength Assignment | 1294.53 | 1295.56 | 1296.59 | nm | ||
1299.02 | 1300.05 | 1301.09 | nm | |||
1303.54 | 1304.58 | 1305.63 | nm | |||
1308.09 | 1309.14 | 1310.19 | nm | |||
Receive Power (OMA) per Lane | ROMA | 4.5 | dBm | |||
Average Input Power per Channel | RXPx | -10.6 | 4.5 | dBm | 2 | |
Rx Sensitivity per lane | RSENS | -8.6 | dBm | |||
LOS De-Assert | LOSD | -30 | dBm | |||
LOS Assert | LOSA | -12 | dBm | |||
Receiver Reflectance | Rr | -26 | dB |
Notes:
1. Hit ratio 5x10-5.
2. Measured with a PRBS 231-1 test pattern, @ 25.78Gb/s, BER<10-12 at RX sensitive.
Electrical Characteristics
Parameter | Symbol | Min | Typ. | Max | Unit | Note |
Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
Supply Current | Icc | 1010 | mA | QSFP-28-100G-LP-10 | ||
1150 | mA | QSFP-28-100G-LP-10E | ||||
Transmitter | ||||||
Input Differential Impedance | Rin | 100 | Ω | 1 | ||
Differential Data Input Swing | Vin, pp | 180 | 1000 | mV | ||
Transmit Disable Voltage | VD | Vcc-1.3 | Vcc | V | ||
Transmit Enable Voltage | VEN | Vee | Vee+0.8 | V | 2 | |
Receiver | ||||||
Differential Data Output Swing | Vout, pp | 300 | 850 | mV | 3 | |
LOS Fault | VLOSfault | Vcc-1.3 | VccHOST | V | 4 | |
LOS Normal | VLOSnorm | Vee | Vee+0.8 | V | 4 |
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Or open circuit.
3. Into 100 Ω differential termination.
4. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
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