25GBase SFP28 To SFP28 DAC Direct Attach Cable 3m SFP-H25G-CU3M Compatible
Cisco SFP-H25G-CU3M Compatible 25GBase SFP28 to SFP28 Direct Attach Cable 3m
This is a Cisco SFP-H25G-CU3M compatible 25GBase-CU SFP28 to SFP28 direct attach cable that operates over passive copper with a maximum reach of 3.0m (9.8ft). Our SFP28 DAC cables offer precision external cable assembly solutions. They meet the ever increasing demand for higher channel density with high-level signal integrity in high performance computing, top-of-rack switching, and network storage deployments.
Features
1. Data rate from 1 Gbps to 28 Gbps
2. 360° shielding for superior EMI/EMC performance
3. Proprietary high-speed PCB termination technology to minimize impedance discontinuity and cross talk
4. Patented back shell and positive latching mechanism for easy engagement and disengagement
5. Overmolded cable termination for increased mechanical robustness
6. Dust covers included for all plugs
High Speed Characteristics
| Parameter |
Symbol |
Min |
Typ |
Max |
Units |
Notes |
|
| Differential Impedance |
RIN,P-P |
90 |
100 |
110 |
Ω |
|
|
| 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
common-mode
output return loss
|
SCC11 |
2
|
|
|
dB
|
At 0.2 to 19 GHz
|
|
| SCC22 |
|
|
|
|
Differential to common-mode
return loss
|
SCD11 |
12 |
|
See 3 |
dB
|
At 0.01 to 12.89 GHz |
|
| SCD22 |
10.58 |
|
See 4 |
At 12.89 to 19 GHz |
|
|
Differential to common Mode
Conversion Loss
|
SCD21-IL
|
10 |
|
|
|
At 0.01 to 12.89 GHz |
|
| |
|
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:
- Reflection Coefficient given by equation SDD11(dB) < 16.5 - 2 × SQRT(f ), with f in GHz
- Reflection Coefficient given by equation SDD11(dB) < 10.66 - 14 × log10(f/5.5), with f in GHz
- Reflection Coefficient given by equation SCD11(dB) < 22 - (20/25.78)*f, with f in GHz
- Reflection Coefficient given by equation SCD11(dB) < 15 - (6/25.78)*f, with f in GHz
- Reflection Coefficient given by equation SCD21(dB) < 27 - (29/22)*f, with f in GHz
Regulatory Compliance
| Feature |
Test Method |
Performance |
| Electrostatic Discharge (ESD) to the Electrical Pins |
MIL-STD-883C Method 3015.7
|
Class 1(>2000 Volts)
|
| Electromagnetic Interference(EMI) |
FCC Class B |
Compliant with Standards |
| CENELEC EN55022 Class B |
| CISPR22 ITE Class B |
|
RF Immunity(RFI)
|
IEC61000-4-3
|
Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz |
| RoHS Compliance |
RoHS Directive 2011/65/EU and it's Amendment Directives 6/6 |
RoHS 6/6 compliant |
Application
25G Ethernet
Data center cabling infrastructure
Description
Our DAC cables extremely low-insertion loss due to the unique foam skin, gas-injected dielectric technology as well as extreme control of balanced/unbalanced (Mode conversion). The technology offers ease of cable management and smaller packaging densities. The cable assemblies employ new, innovative PCB technology designed specifically to deliver signal integrity performance. The cables regulate cross talk and launch conditions between wire and PCB termination to optimize return loss and prevent or minimize “ringing” effects. Please contact us for more details.
Details
• Compliant with SFF-8402 and SFF-8432
• Compatible to SFP+ MSA SFF-8431
• Lowest total system EMI solution
• Single 3.3V power supply
• RoHS Compliant and Lead-Free
