Factory high quality 25G SFP28 Passive Direct Attach Copper Twinax Cable

The SFP28 passive cable assemblies are high performance, cost effective I/O solutions for 25G Ethernet. SFP28 copper cables allow hardware manufactures to achieve high port density, configurability and utilization at a very low cost and reduced power budget

SFP28 Direct Attach Cables are compliant with SFF-8432 and SFF-8402 specifications. Various choices of wire gauge are available from 30 to 26 AWG with various choices of cable length (up to 5m).

Features 

Up to 25.78125 Gbps data rate

Up to 5 meter transmission

Hot-pluggable SFP 20PIN footprint

Improved Pluggable Form Factor(IPF)

compliant for enhanced EMI/EMC

performance

Compatible to SFP28 MSA

Compatible to SFF-8402 and SFF-8432

Temperature Range: 0~ 70 °C

RoHS Compatible

 

Advantage

Cost-effective copper solution

Lowest total system power solution

Lowest total system EMI solution

Optimized design for Signal Integrity

High Speed Characteristics

Parameter Symbol Min. Typical. Max. Unit Note

Differential Impedance

RIN,P-P

90

100

110

Ώ

Insertion loss

SDD21

8

22.48

dB

At 12.8906 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 SCC11 -

dB

common-mode 2

At 0.2 to 19 GHz

SCC22
output return loss
Differential to common-mode SCD11 12 - See 3

dB

At 0.01 to 12.89 GHz

return loss

SCD22

10.58

See 4

At 12.89 to 19 GHz

10

At 0.01 to 12.89 GHz
Differential to common Mode

SCD21-IL

Conversion Loss

See 5

dB

At 12.89 to 15.7 GHz

6.3

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

Applications

25G Ethernet