Ascent’s 200GE QSFP56 cable assemblies are high-performance, cost-effective I/O solutions for LAN, HPC and SAN. The high‑speed cable assemblies meet and exceed 200 Gigabit Ethernet, InfiniBand EDR and temperature requirements for performance and reliability. The cables are compliant with SFF-8436 specifications and provide connectivity between devices using QSFP ports.
• QSFP56 conforms to the small form factor SFF8665
• 4-channel full-duplex passive copper cable transceiver
• Low crosstalk
• Maximum aggregate data rate: 200 Gb/s (4 x 50 Gb/s)
• IEEE 802.3bj 200GEBASE-CR4
• Copper link x (x=1m, 3m, 5m)
• Support data rates: 50Gb/s PAM4 (per channel)
• I2C based two-wire serial interface for EEPROM signature which can be customized
• Power Supply: +3.3 V
• Operating Temperature: 0 to +70 °C
• RoHS Compliant
Recommended Operating Environment
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Storage Temperature | ‑40 | +85 | °C | |||
Operating Case Temperature | Tc | 0 | +70 | °C | ||
Power Supply Voltage | VCC3 | 3.14 | 3.3 | 3.47 | V | |
Data Rate Per Lane | 1 | 50 | Gb/s |
High Speed Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Differential Impedance | RIN, P | 90 | 200 | 110 | Ω | |
Insertion Loss | SDD2 | 8 | 22.48 | dB | ||
Differential Return Loss | SDD11 | 12.45 | See 1 | dB | ||
SDD22 | 3.12 | See 2 | dB | |||
Common‑Mode to Common‑Mode Output Return Loss | SCC11, SCC22 | 2 | dB | |||
Differential to Common‑Mode Return Loss | SCD11 | 12 | See 3 | dB | ||
SCD22 | 10.58 | See 4 | dB | |||
Differential to Common Mode Conversion Loss | SCD21‑IL | 10 | dB | |||
SCD21‑IL | See 5 | dB | ||||
SCD21‑IL | 6.3 | dB | ||||
Channel Operating Margin | COM | 3 | dB |
Notes:
1. Reflection Coefficient given by equation SDD11(dB) < 16.5 ‑ 2 * SQRT(f), with f in GHz
2. Reflection Coefficient given by equation SDD11(dB) < 10.66 ‑ 14 * log10(f/5.5), with f in GHz
3. Reflection Coefficient given by equation SCD11(dB) < 22 ‑ (20/50) * f, with f in GHz
4. Reflection Coefficient given by equation SCD11(dB) < 15 ‑ (6/50) * f, with f in GHz
5. Reflection Coefficient given by equation SCD21(dB) < 27 ‑ (29/22) * f, with f in GHz
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