D-net`s Direct Attach Copper Cable Service
● Compatibility Assistance: D-NET offers compatibility services to ensure optical modules are compatible with equipment from leading manufacturers.
● Personalized Services: D-NET provides OEM customization options for its products. Upon request, customers can have colored logo labels tailored to their needs.
● Standard Delivery Period: 3 Days
● Extensive Shipping Solutions: D-NET collaborates with highly reputable courier companies such as SF, FedEx, DHL, UPS, and others to ensure reliable shipping services.
Features
● Hot-plug capability for easy swapping
● Offers 3X higher port density compared to SFP/SFP+
● Features optimized Near-End Cross-Talk (NEXT) and Return Loss performance
● Provides a cost-effective and low-power alternative to fiber optic cables
● Complies with QSFP+ MSA and SFF-8436 standards
● Adheres to IEEE 802.3ba and Infiniband QDR specifications
● Enhanced Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) performance
● Supports serial ID functionality through an integrated EEPROM
● Passive cable assembly supports lengths up to 7 meters
● Available in cable sizes ranging from 30AWG to 24AWG
● Compliant with RoHS standards and offers a halogen-free option
Outline drawing
Wiring Diagram
Electrical Performance
Signal Integrity：
|
(ITEM) |
(REQUIREMENT) |
(TEST CONDITION) |
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|
(Differential Impedance) |
Cable Impedance |
100±5Ω |
Rise time of 35ps (20 % - 80 %). |
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|
Paddle Card Impedance |
100±10Ω |
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|
Cable Termination Impedance |
100±15Ω |
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|
[Differential (Input/Output)Return loss SDD11/SDD22] |
≤-10dB |
10MHz≤f≤5GHz |
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|
[Differential Insertion Loss (SDD21 Max.)] |
(Differential InsertionLoss Max. For TPa to TPb Excluding Test fixture ) |
10MHz≤f ≤19GHz |
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|
F AWG |
600Mhz |
1.25Ghz |
2.5Ghz |
5.0Ghz |
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|
30(1m) |
≥-3.0dB |
≥-4.0dB |
≥-5.5dB |
≥-8.0dB |
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|
28(3m) |
≥-5.0dB |
≥-6.5dB |
≥-9.5dB |
≥-14.0dB |
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|
26(5m) |
≥-6.0dB |
≥-8.0dB |
≥-11.0dB |
≥-16.0dB |
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|
24(10m) |
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|
[Insertion Loss Deviation] |
-0.7-0.2*10-3f ≤ ILD ≤ 0.7+0.2*10-3f (f is the frequency in MHz) |
10MHz≤f≤5GHz |
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|
[MDNEXT(multiple disturber near-end crosstalk)] |
≥26dB |
10MHz≤f≤5GHz |
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Other Electrical Performance：
|
(ITEM) |
(REQUIREMENT) |
(TEST CONDITON) |
|
[Low Level Contact Resistance] |
80milliohms Max. From initial. |
EIA-364-23:Apply a maximum voltage of 20mV And a current of 100 mA. |
|
Insulation Resistance |
10Mohm(Min.) |
EIA364-21:AC 300V 1minute |
|
[Dielectric Withstanding Voltage] |
NO disruptive discharge. |
EIA-364-20:Apply a voltage of 300 VDC for 1minute between adjacent terminals And between adjacent terminals and ground. |
Environment Performance
|
(ITEM) |
(REQUIREMENT) |
(TEST CONDITON) |
|
[Operating Temp. Range] |
-20°C to +75°C |
Cable operating temperature range. |
|
[Storage Temp. Range (in packed condition)] |
-20°C to +55°C |
Cable storage temperature range in packed condition. |
|
[Thermal Cycling Non-Powered] |
No evidence of physical damage |
EIA-364-32D, Method A, -25 to 90C, 100 cycles, 15 min. dwells |
|
[Salt Spraying] |
48 hours salt spraying after shell corrosive area less than 5％. |
EIA-364-26 |
|
Mixed Flowing Gas |
Pass electrical tests per 3.1 after stressing. (For connector only) |
EIA-364-35 Class II,14 days. |
|
Temp. Life |
No evidence of physical damage |
EIA-364-17C w/ RH, Damp heat 90℃ at 85% RH for 500 hours then return to ambient |
|
Cable Cold Bend |
4H,No evidence of physical damage |
Condition: -20℃±2℃, mandrel diameter is 6 times the cable diameter. |
Mechanical and Physical Characteristics
|
(ITEM) |
(REQUIREMENT) |
(TEST CONDITON) |
|
Vibration |
Pass electrical tests per 3.1 after stressing. |
Clamp & vibrate per EIA-364-28E, TC-VII, test condition letter – D, 15 minutes in X, Y & Z axis. |
|
Cable Flex |
No evidence of physical damage |
Flex cable 180° for 20 cycles (±90° from nominal position) at 12 cycles per minute with a 1.0kg load applied to the cable jacket. Flex in the boot area 90º in each direction from vertical. Per EIA-364-41C |
|
Cable Plug Retention in Cage |
90N Min. No evidence of physical damage |
Force to be applied axially with no damage to cage. Per SFF 8661 Rev 2.1 Pull on cable jacket approximately 1 ft behind cable plug. No functional damage to cable plug below 90N. Per SFF-8432 Rev 5.0 |
|
Cable Retention in Plug |
90N Min. No evidence of physical damage |
Cable plug is fixtured with the bulk cable hanging vertically. A 90N axial load is applied (gradually) to the cable jacket and held for 1 minute. Per EIA-364-38B |
|
Mechanical Shock |
Pass electrical tests Per 3.1 after stressing. |
Clamp and shock per EIA-364-27B, TC-G,3 times in 6 directions, 100g, 6ms. |
|
Cable Plug Insertion |
40N Max. |
Per SFF-8436 Rev 5.4.1. |
|
Cable plug Extraction |
30N Max. |
Place axial load on de-latch to de-latch plug.Per SFF-8436 Rev 5.4.1. |
|
Durability |
50 cycles,No evidence of physical damage |
EIA-364-09, perform plug &unplug cycles:Plug and receptacle mate rate: 250times/hour. 50times for module (CONNECTOR TO PCB) |
FAQ
1. What is the maximum data transfer rate supported by the 40G QSFP+ Passive DAC Direct Attach Copper Cable?
A: This cable supports a data transfer rate of up to 40 Gigabits per second (Gbps).
2. What is 40G QSFP+ to QSFP+ passive copper cable?
A:A 40G QSFP+ to QSFP+ passive copper cable is a direct attach cable (DAC) that connects two QSFP+ ports with a data transfer rate of up to 40 Gbps, utilizing copper conductors for high-speed, low-latency signal transmission.
3. Can a 40G QSFP+ Passive DAC Direct Attach Copper Cable be used for both transmit and receive signals?
A: Yes, these cables are designed to support bidirectional communication, carrying both transmit and receive signals simultaneously.
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