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40G QSFP+ ER4 40 km
Ascent QSFP+ ER4 is designed to operate over single-mode fiber system using 4 × 10 CWDM channels in 1310 band and links up to 40 km. The module converts 4 inputs channel of 10 Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40 Gb/s optical transmission. On the receiver side, the module optically de-multiplexes a 40 Gb/s input into 4 CWDM channels signals, and converts them to 4 output channels of electrical data.
• Hot-pluggable QSFP+ form factor
• Supports 41.3 Gb/s aggregate bit rate
• Power dissipation < 3.5W
• 18.5 dB link insertion loss budget
• RoHS-6 compliant
• Commercial case temperature range 0°C to 70°C
• Single 3.3V power supply
• Maximum link length of 40 km on single-mode fiber (SMF)
• Uncooled 4 x 10Gb/s CWDM transmitter
• XLPPI electrical interface
• Duplex LC receptacles
• Built-in digital diagnostic functions, including Tx/Rx power monitoring
General Product Characteristics
Parameter | Value | Notes |
Module Form Factor | QSFP+ | |
Maximum Aggregate Data | 41.2500 Gb/s | |
Maximum Data Rate per Lane | 10.3125 Gb/s | |
Protocols Supported | 40G Ethernet | |
Electrical Interface and Pin‑Out | 38‑pin edge connector | Pin‑out as defined by the QSFP+ MSA |
Maximum Power | 3.5 W | |
Management Interface | Serial, I2C‑based, 400 kHz maximum frequency | As defined by the QSFP+ MSA |
Data Rate Specifications | Symbol | Min. | Typ. | Max. | Units | Note |
Bit Rate per Lane | BR | 10.3125 | Gb/sec | 1 | ||
Bit Error Ratio | BER | 10‑12 | 2 | |||
Link distance on SMF‑28 | d | 0.002 | 40 | km | 3 |
Notes:
1. ± 100 ppm, compliant with 40GBASE‑ER4 and XLPPI per IEEE 802.3bm.
2. Tested with a PRBS 231‑1 test pattern.
3. Per 40GBASE‑ER4, IEEE 802.3bm. Links longer than 30km are considered to be engineered links, with losses less than the worst case specified for the fiber type.
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Maximum Supply Voltage | Vcc1, VccTx, VccRx | ‑0.5 | 3.6 | V | ||
Storage Temperature | TS | ‑40 | 85 | C | ||
Case Operating Temperature | TOP | 0 | 70 | C | ||
Relative Humidity | RH | 0 | 85 | % | 1 | |
Damage Threshold, per Lane | DT | 3.8 | dBm |
Notes:
1. Non‑condensing.
Electrical Characteristics (TOP = 0 °C to 70 °C, VCC = 3.1 V to 3.47 V)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Supply Voltage | Vcc1, Vcc Tx, VccRx | 3.1 | 3.47 | V | ||
Supply Current | Icc | 1.13 | A | |||
Link Turn‑On Time | ||||||
Transmit Turn‑On Time | 200 | ms | 2 | |||
Transmitter (per Lane) | ||||||
Single‑Ended Input Voltage Tolerance | VinT | ‑0.3 | 4.0 | V | ||
Differential Data Input Swing | Vin, pp | 120 | 120 | mVpp | 3 | |
Differential Input Threshold | 50 | mV | ||||
AC Common Mode Input Voltage Tolerance (RMS) | 15 | mV | ||||
Differential Input Return Loss | Per IEEE P802.3ba, section 86A.4.1.1 | dB | 4 | |||
J2 Jitter Tolerance | Jt2 | 0.17 | UI | |||
J9 Jitter Tolerance | Jt9 | 0.29 | UI | |||
Data Dependent Pulse Width Shrinkage | DDPWS | 0.07 | UI | |||
Eye mask coordinates {X1, X2, Y1, Y2} | 0.11, 0.31 95, 350 | UI mV | 5 | |||
Receiver (per Lane) | ||||||
Single‑Ended Output Voltage | ‑0.3 | 4.0 | V | |||
Differential Data Output Swing | Vout, pp | 0 | 800 | mVpp | 6 | |
AC Common Mode Output Voltage (RMS) | 7.5 | mV | ||||
Termination Mismatch at 1 MHx | 5 | % | ||||
Differential Output Return Loss | Per IEEE P802.3ba, section 86A.4.2.1 | dB | 4 | |||
Common Mode Output Return Loss | Per IEEE P802.3ba, section 86A.4.2.2 | dB | 4 | |||
Output transition time, 20% to 80% | 28 | ps | ||||
J2 Jitter output | Jo2 | 0.42 | UI | |||
J9 Jitter output | Jo9 | 0.65 | UI | |||
Eye mask coordinates #1 {X1, X2, Y1, Y2} | 0.29, 0.5 150, 425 | UI mV | 5 | |||
Power Supply Ripple Tolerance | PSR | 50 | mVpp | |||
Notes:
1. Maximum total power value is specified across the full temperature and voltage range.
2. From power‑on and end of any fault conditions.
3. After internal AC coupling. Self‑biasing 100 differential input.
4. 10 MHz to 11.1 GHz range.
5. Hit ratio = 5 x 10E‑5.
6. AC coupled with 100 differential output impedance.
Optical Characteristics (TOP = 0 °C to 70 °C, VCC = 3.1 V to 3.47 V)
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Transmitter | ||||||
Signaling Speed per Lane | 10.312 | GBd | 1 | |||
Lane Center Wavelengths (Range) | 1264.5 to 1277.5 1284.5 to 1297.5 1304.5 to 1317.5 1324.5 to 1337.5 | nm | ||||
Total Average Launch Power | POUT | 10.5 | dBm | |||
Transmit OMA per Lane | TxOM | 0.3 | 5.0 | dBm | ||
Average Launch Power per Lane | TXPx | ‑2.7 | 4.5 | dBm | 2 | |
Difference in Launch Power between Any Two Lanes (OMA) | 4.7 | dB | ||||
Transmitter Dispersion Penalty | TDP | 2.6 | dB | |||
Launch Power (OMA) Minus TDP per Lane | ‑0.5 | dBm | ||||
Optical Extinction Ratio | ER | 5.5 | dB | |||
Sidemode Suppression ratio | SSRmi | 30 | dB | |||
Average Launch Power of OFF Transmitter, per Lane | ‑30 | dBm | ||||
Relative Intensity Noise | RIN | ‑128 | dB/Hz | 3 | ||
Optical Return Loss Tolerance | 20 | dB | ||||
Transmitter Reflectance | ‑12 | dB | ||||
Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | |||||
Receiver | ||||||
Signaling Speed per Lane | 10.312 | GBd | 4 | |||
Lane Center Wavelengths (Range) | 1264.5 to 1277.5 1284.5 to 1297.5 1304.5 to 1317.5 1324.5 to 1337.5 | nm | ||||
Receive Power (OMA) per Lane | RxOM | ‑4.0 | dBm | |||
Average Receive Power per Lane | RXPx | ‑ | ‑4.5 | dBm | 5, 6 | |
Receiver Sensitivity (OMA) per Lane | Rxsen | ‑19 | dBm | |||
Stressed Receiver Sensitivity (OMA) per Lane | SRS | ‑16.8 | dBm | |||
Damage Threshold per Lane | PMAX | 3.8 | dBm | |||
Return Loss | RL | ‑26 | dB | |||
Vertical Eye Closure Penalty, per Lane | 2.2 | dB | ||||
Receive Electrical 3 dB Upper Cutoff Frequency, per Lane | 12.3 | GHz | ||||
LOS De‑Assert | LOSD | ‑19 | dBm | |||
LOS Assert | LOSA | ‑35 | dBm | |||
LOS Hysteresis | 1 | dB | ||||
Notes:
1. Transmitter consists of 4 lasers operating at up to 10.3 Gb/s each, ± 100ppm
2. Minimum value is informative.
3. RIN is scaled by 10*log(10/4) to maintain SNR outside of transmitter.
4. Receiver consists of 4 photodetectors operating at up to 10.3125 Gb/s each, ± 100ppm
5. Minimum value is informative, equals min TxOMA with infinite ER and max channel insertion loss.
6. Maximum value is based on a min. of 9 dB loss. Additional attenuation may be required when connected in loopback or short fiber link.
Memory Map and Control Registers
Compatible with SFF‑8636 (QSFP+ MSA). Please see Finisar Application Note AN‑2104.
Environmental Specifications
QSFP‑AQ‑LP‑W4‑40 transceivers have an operating temperature range from 0°C to +70°C case temperature.
Environmental Specifications | Symbol | Min. | Typ. | Max. | Units | Ref. |
Case Operating Temperature | Top | 0 | 70 | °C | ||
Storage Temperature | Tsto | ‑40 | 85 | °C |
Regulatory Compliance
QSFP‑AQ‑LP‑W4‑40 transceivers are RoHS‑6 Compliant. Copies of certificates are available at Finisar Corporation upon request.
QSFP‑AQ‑LP‑W4‑40 transceiver modules are Class 1 laser eye safety compliant per IEC 60825‑1.
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