The 7217050 25G SFP28 direct attach cables is a low-cost, high-efficiency high-speed interconnection solution with a single channel maximum transmission rate of up to 25Gbps. It is suitable for stacking and connection of short-distance switch equipment.
[Differential (Input/Output)Return loss
SDD11/SDD22]
Return_loss(f)≥
Where
f is the frequency in GHz
Return loss(f) is the return loss at frequency f
10MHz≤f ≤19GHz
[Differential to common-mode (Input/Output)Return loss SCD11/SCD22]
Return_loss(f)≥
Where
f is the frequency in GHz
Return_loss(f) is the Differential to common-mode return loss at frequency f
10MHz≤f ≤19GHz
[Common-mode to Common-mode
(Input/Output)Return loss SCC11/SCC22]
Return_loss(f)≥2dB 0.2≤f≤19
Where
f is the frequency in GHz
Return_loss(f) is the common-mode to common-mode return loss at frequency f
10MHz≤f ≤19GHz
[Insertion Loss Deviation]
-0.176*f – 0.7 ≤ ILD ≤ 0.176* f + 0.7
50MHz≤f ≤19GHz
Differential to common-mode Conversion Loss-Differential Insertion Loss(SCD21-SDD21)
Conversion _loss(f) – IL(f)≥
Where
f is the frequency in GHz
Conversion_loss(f ) is the cable assembly differential to common-mode conversion loss
IL(f) is the cable assembly insertion loss
10MHz≤f ≤19GHz
[MDNEXT(multiple disturber
near-end crosstalk)]
≥35dB @12.89GHz
10MHz≤f ≤19GHz
[Intra Skew]
15ps/m,
10MHz≤f ≤19GHz
2. Differential InsertionLoss Max. For TPa to TPb Excluding Test fixture
AWG
Length
1.25GHz
2.5GHz
5.0GHz
7.0GHz
10GHz
12.89GHz
30 AWG
Max. 1m
4.5dB
5.4dB
6.3dB
7.5dB
8.5dB
10.5dB
30/28 AWG
Max. 3m
7.5dB
9.5dB
12.2dB
14.8dB
18.0dB
21.5dB
26 AWG
Max. 3m
5.7dB
7.2dB
9.9dB
11.9dB
14.1dB
16.5dB
26/25 AWG
Max. 5m
7.8dB
10.0dB
13.5dB
16.0dB
19.0dB
22.0dB
3. Environment Performance
Item
Requiement
Test Condition
Operating Temp. Range
-20°C to +75°C
Cable operating temperature range.
Storage Temp.Range
(in packed condition)
-40°C to +80°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.
4. Mechanical and Physical Characteristics
Item
Requiement
Test Condition
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.
Twist
No evidence of physical damage
Twist cable 180° (±90° from nominal position) for 100 cycles at 30 cycles per minute with a 0.5kg load applied to the cable jacket.Clamp position: 300mm
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.(QSFP28)
Per SFF8661 Rev 2.1
Cable plug Extraction
30N Max. (QSFP28)
Place axial load on de-latch to de-latch plug.
Per SFF8661 Rev 2.1
Durability
50 cycles,No evidence of physical damage
EIA-364-09, perform plug &unplug cycles:Plug and receptacle mate rate: 250times/hour. 50times for QSFP28/SFP28 module (CONNECTOR TO PCB)
5. Wiring Diagram
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