100G QSFP28 To QSFP28 DAC PCC Passive Direct Attach Cable Twinax Copper Cable

100 Gigabit Direct Attach Twinax Copper Cable Assembly Up to 5m Transmission

Functional Specification

Description

This QSFP28 to QSFP28 direct attach cable is a high-speed, cost effective alternative that supports to establish a 100-Gigabit link between QSFP-100G ports of switches within racks and across adjacent racks with a maximum reach of 5-meter.

The 100G QSFP28 Passive direct attach cable contains 8 high-speed copper pairs, each operating at data rates of up to 25Gb/s. Each QSFP28 port comprises an EEPROM providing product information, which can be read by the host system.

It has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional.

This Direct Attach Copper is compliant with IEEE 802.3, SFF-8665, and QSFP28 MSA standards.

Ordering Information

Features

• Data rate up to 103.125Gbps
• 4-Channel Full-Duplex Passive Copper Cable Transceiver,25.78Gb/s per channel
• Up to 5m transmission
• Hot-pluggable QSFP28 38 PIN footprint
• Compatible to SFF-8665
• Compliant with IEEE 802.3bj
• Single 3.3V power supply
• Low crosstalk
• I2C based two-wire serial interface for EEPROM signature which can be customized
• Temperature Range: 0~ 70 °C
• RoHS compliant

Applications of 100G QSFP28 Direct Attach Cable

• Low EMI radiation switches, servers and routers
• Data center networks
• Storage area networks
• High performance computing
• Telecommunication and wireless infrastructure
• Medical diagnostics and networking
• Test and measurement equipment

High Speed Specifications

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.

Compatibility

All Gigaopto DAC are standards-based and MSA (Multi-Source Agreement) compliant, and rigorously tested and coded in our own facilities to ensure the highest level of performance. We conduct 100% application testing under end-use conditions.

For this 100GBASE QSFP28 to QSFP28 100G Passive Direct-Attach-Cables, please refer to the P/N correspondence table (Fox example in 1M length). For more product compatibility, please feel free to tell us.

FAQ

1. Can you provide the 100G passive cables longer than 5m?

A: The 100G Passive Direct Attach Copper Twinax Cable ranges from 0.5m to 5m. The longest 100G Passive DAC cables are 5m, because the Passive DAC does not contain electronics for signal conditioning, and cable lengths longer than 5 meters will affect data transmission.

If a longer cable is required, we recommend our 100G QSFP28 Active Direct Attach Copper Twinax Cable (Part Number:GD-QSFP28-A9M), which can reach up to 9-meter.