ASCENT 40G QSFP+ Active Optical Cable is a high-performance integrated cable suitable for high-speed core network and data center applications.
• Full duplex 4 channel 850 nm parallel active optical cable
• Up to 11.1 Gbps data rate per channel
• Maximum link length of 300m links on OM3 multi-mode fiber
• High-reliability 850 nm VCSEL technology
• Electrically hot-pluggable
• < 1.5 W power dissipation per cable end
• QSFP+ MSA compliant
• RoHS compliant
• Case operating temperature range: 0 °C to +70 °C
Absolute Maximum Ratings
Parameter | Symbol | Value | Notes |
Storage Temperature | Ts | ‑40 °C to 85 °C | |
Relative Humidity | RH | 5 % to 95 % | |
Power Supply Voltage | Vcc | ‑0.3 V to 4.0 V | |
Signal Input Voltage | Vcc ‑ 0.3 V to Vcc + 0.3 V |
Recommended Operating Conditions
Parameter | Symbol | Value | Notes |
Case Operating Temperature | Tcase | 0 °C to 70°C | Without air flow |
Power Supply Voltage | Vcc | 3.13 V to 3.46 V, 3.3 V typical | |
Power Supply Current | Icc | 450 mA maximum | Per cable end |
Data Rate | BR | 10.3125 Gbps | Each channel |
General Product Characteristics
Parameter | Value | Notes |
Module Form Factor | QSFP+ | |
Number of Lanes | 4 Tx /Rx | |
Maximum Aggregate Data Rate | 42.0 | |
Maximum Data Rate per Lane | 10.5 | |
Standard Cable Lengths | 3, 5, 7, 10, 50, 100 | 1 |
Protocols Supported | Typical applications include Infiniband, Fiber Channel, 40G Ethernet | |
Electrical Interface and Pin‑out | 38‑pin edge connector | 2 |
Standard Optical Cable Type | Multi‑mode ribbon fiber cable assembly, riser‑rated | |
Maximum Power Consumption per End | 1.5 | |
Management Interface | Serial, I2C‑based, 400 kHz maximum frequency | 3 |
Notes:
1. Please contact sales for other lengths
2. Pin‑out as defined by the QSFP+ MSA
3. As defined by the QSFP+ MSA
Electrical Characteristics
Parameter | Symbol | Value | Notes |
Supply Voltage | Vcc1, VccTx, VccRx | 3.14 V to 3.46 V, 3.3 V typical | |
Supply Current | Icc | 450 mA maximum | |
Transmitter | |||
Differential Data Input Swing | Vin,pp | 180 mV to 1000 mV | 1 |
Single Ended Input Voltage tolerance | VinT | ‑0.3 V to 4.0 V | |
Receiver | |||
Vout,pp | 300 mV to 850 mV | 2 | |
Single‑ended Output Voltage | ‑0.3 V to +4.0 V |
Notes:
1. AC coupled internally. See Figure 1 for input eye mask requirements. Self‑biasing 100 Ω differential input.
2. AC coupled with 100Ω differential output impedance. See Figure 2 for output eye mask.
Figure 1 ‑ Transmitter Input Differential Signal Mask
Figure 2 ‑ Receiver Output Differential Signal Mask
High‑speed Electrical Characteristics per Lane
Parameter‑Inputs | Symbol | Value | Notes |
Reference Differential Input Impedance | Zd | 100 Ω | |
Termination Mismatch | ΔZM | 5% maximum | 1 |
Input AC Common Mode Voltage | 25 mV (RMS) maximum | ||
Differential Input Return Loss | SDD11 | 2, 0.01 GHz to 4.1 GHz | |
SDD11 | 3, 4.1 GHz to 11.1 GHz | ||
Differential to Common Mode Loss | SCD11 | ‑10 dB maximum | 0.01 GHz to 11.1 GHz |
Jitter Tolerance (Total) | TJ | 0.40 UI | |
Jitter Tolerance (Deterministic) | DJ | 0.15 UI |
Notes:
1. See SFF‑8431 section D.15 Termination Mismatch for definition and test recommendations
2. Reflection coefficient given by equation SDD11 (dB) < ‑12 + 2 * SQRT(f), with f in GHz. See Figure 3.
3. Reflection coefficient given by equation SDD11 (dB) < ‑6.3 + 13Log10(f/5.5), with f in GHz. See Figure 3
Figure 3 ‑ Maximum Transmitter Input and Receiver Output Differential Return Loss
Parameter‑Inputs | Symbol | Value | Notes |
Reference Differential Output Impedance | Zd | 100 Ω | |
Termination Mismatch | ΔZM | 5 % maximum | |
Output AC Common Mode Voltage | 15 mV (RMS) maximum | ||
Differential Output Return Loss | SDD22 | 4, 0.01 GHz to 4.1 GHz | |
SDD22 | 5, 4.1 GHz to 11.1 GHz | ||
Common Mode Output Return Loss | SCC22 | 6, 0.01 GHz to 2.5 GHz | |
SCC22 | ‑3 dB maximum | 2.5 GHz to 11.1 GHz | |
Jitter Tolerance (Total) | TJ | ||
Output Rise and Fall time (20 % to 80 %) | tRH, tFH | 24 ps minimum | |
Deterministic Jitter | DJOUT | 0.38 UI | 7 |
Total Jitter | TJOUT | 0.64 UI | 7 |
Notes:
4. Reflection coefficient given by equation SDD22 (dB) < ‑12 + 2 * SQRT(f), with f in GHz. See Figure 3.
5. Reflection coefficient given by equation SDD22 (dB) < ‑6.3 + 13Log10(f/5.5), with f in GHz. See Figure 3.
6. Reflection coefficient given by equation SCC22 (dB) < ‑7 + 1.6 * f, with f in GHz.
7. When transmitter input jitter specs are met.
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