Ascent’s QSFP28 passive direct attach copper twinax cable assemblies are high-performance, cost-effective I/O solutions for 100G Ethernet and 100G Fiber Channel applications.
• QSFP28 conforms to Small Form-Factor SFF8665
• 4-channel full-duplex passive copper cable transceiver
• Supports data rates: 25.78 Gb/s (per channel)
• Maximum aggregate data rate: 100Gb/s (4 x 25.78Gb/s)
• IEEE 802.3bj 100GEBASE-CR4
• Copper link x (x=1m, 2m, 3m, 5m)
• Power Supply: +3.3V
• Low crosstalk
• I2C based two-wire serial interface for EEPROM signature which can be customized
• Operating temperature: 0 °C to +70 °C
• Compatible to QSFP28 MSA
• RoHS Compliant
Parameter | Symbol | Min. | Typ. | Max. | Unit |
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 | 25.78 | Gb/s |
Note: Damage may occur if the transceiver is subjected to conditions beyond the limits.
High Speed Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Differential Impedance | RIN, P | 9 | 100 | 110 | Ω | |
Insertion Loss | SDD2 | 8 | 22.48 | dB | At 12.8906 | |
Differential Return Loss | SDD11 SDD22 | 12.45 | See 1 | dB | At 0.05 to | |
3.12 | See 2 | At 4.1 to 19 | ||||
Common‑Mode to Common‑Mode Output Return Loss | SCC11 SCC22 | 2 | dB | At 0.2 to 19 GHz | ||
Differential to Common‑Mode Return Loss | SCD11 SCD22 | 12 | See 3 | dB | At 0.01 to | |
10.58 | See 4 | At 12.89 to | ||||
Differential to Common Mode Conversion Loss | SCD21‑IL | 10 | dB | At 0.01 to | ||
See 5 | At 12.89 to | |||||
6.3 | At 15.7 to | |||||
Channel Operating Margin | COM | 3 | dB |
Notes:
1. Reflection Coefficient given by equation SDD11(d B) < 16.5 ‑ 2 × SQRT(f ), with finGHz.
2. Reflection Coefficient given by equation SDD11(dB) < 10.66 ‑ 14 × log10(f/5.5), with finGHz.
3. Reflection Coefficient given by equation SCD11(d B) < 22 ‑ (20/25.78)*f, with finGHz.
4. Reflection Coefficient given by equation SCD11(dB) < 15 ‑ (6/25.78)*f, with finGHz.
5. Reflection Coefficient given by equation SCD21(dB) < 27 ‑ (29/22)*f, with finGHz.
800G Twin-port 2x400G OSFP Active Copper Cable
800G Twin-port 2x400G OSFP Passive DAC Cable
800G 4x200G OSFP Breakout Active Copper Cable
400G OSFP to 400G QSFP-DD Passive DAC Twinax Cable
400G OSFP to 4x100G QSFP56 Passive DAC Breakout Cable
400G QSFP-DD Passive Direct Attach Copper Cable
400G QSFP-DD to 4x100G QSFP56 Active Optical Cable
400G QSFP-DD to 4x100G QSFP28 Active Optical Cable
400G OSFP to 2x200G QSFP56 AOC Breakout Cable
400G QSFP-DD Active Optical Cable
400G QSFP-DD to 2x 200G QSFP56 Active Optical Breakout Cable
200G QSFP56 to QSFP56 Active Optical Cable
200G QSFP56 PSM4 Direct Attach Passive Copper Cables
200G QSFP56 to 2x100G QSFP56 Direct Attach Copper Cable
100 Gb/s QSFP28 Active Optical Cable
40G QSFP+ to 4x10G SFP+ Transceiver
40G QSFP+ to QSFP+ Passive Copper Cable (PCC)
40G QSFP+ Active Optical Cable
QSFP+ 4x10Gb/s Transceiver MPO Kit
12/24 MTP/MPO LC Harness Cable Assembly
10G SFP+ Active Optical Cable
100G QSFP28 to 25G SFP28 Adapter
SFPP-AT-DAC-2M 10G SFP+ Passive Direct Attach Copper Twinax Cable (PCC)
QSFP to SFP/SFP+ Adapter Module
Get in touch with our experts
Feedback