Sign in

Sign in
Reset PasswordCreate an Account

Create an Account

Create an Account
Sign in

400G QSFP DD DAC Cable

The 400G QSFP-DD to QSFP-DD Passive Direct Attach Copper (DAC) Cable is a cost-effective solution for short-range, high-speed data transmission in data centers. With QSFP-DD connectors on both ends, it connects network devices like switches and servers within or between adjacent racks. As a passive cable, it requires no external power, relying on host devices for signal conditioning, ensuring low latency and high reliability. Supporting 400 Gbps through eight 50 Gbps lanes, it complies with IEEE 802.3cd and QSFP-DD MSA standards, delivering excellent signal integrity while reducing crosstalk and electromagnetic interference (EMI). Its robust design suits demanding applications like cloud computing, artificial intelligence, and high-performance networking. The plug-and-play functionality simplifies deployment and reduces downtime. Ideal for short distances, the cable offers significant cost and energy savings by eliminating the need for active optical modules. Available in various lengths, it adapts to diverse setups while meeting strict industry performance standards. The 400G QSFP-DD Passive DAC Cable is a reliable and efficient choice for next-generation network environments.

·       Compatible with IEEE 802.3bj and IEEE 802.3cd

·       Supports aggregate data rates of 400Gbps(PAM4)

·       Optimized construction to minimize insertion loss and cross talk

·       Pull-to-release slide latch design

·       28AWG through 30AWG cable

·       Straight and break out assembly configurations available

·       Customized cable braid termination limits EMI radiation  

·       Customizable EEPROM mapping for cable signature

·       RoHS compliant


High Speed Characteristics

Parameter

Symbol

Min

Typ

Max

Unit

Note

Differential Impedance

TDR

90

100

110

Ώ


Insertion loss

SDD21

-16.06


-8

dB

At 13.28 GHz

Differential Return Loss

SDD11

-12.45


See 1

dB

At 0.05 to 4.1 GHz


SDD22

-3.12


See 2

dB

At 4.1 to 19 GHz

Common-mode to common-mode output return loss

SCC11

SCC22



-2

dB

At 0.2 to 19 GHz



Differential to common-mode

return loss

SCC11

-12


See 3

dB

At 0.01 to 12.89 GHz






SCC22

-10.58


See 4

dB

At 12.89 to 19 GHz

Differential to common Mode

Conversion Loss

SCD21-IL



-10

dB

At 0.01 to 12.89 GHz








See 5

dB

At 12.89 to 15.7 GHz





-6.3

dB

At 15.7 to 19 GHz

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 + (20/25.78)*f, with f in GHz.

4.         Reflection Coefficient given by equation SCD11(dB) < -15 + (6/25.78)*f, with f in GHz.

5.         Reflection Coefficient given by equation SCD21(dB) < -27 + (29/22)*f, with f in GHz.


image.png

Series Recommendation
Related Information

Get in touch with our experts

Feedback