40Gbps QSFP+ to 4x 10G SFP+ Compatible Direct Attach Copper Twinax Passive Cable

（ITEM）

（REQUIREMENT）

（TEST CONDITION）

（Differe ntial Impedan ce）

Cable

Impedance

105+5/-5Ω

Rise time of 35ps (20 % - 80 %).

Paddle Card

Impedance

100±10Ω

Cable Termination

Impedance

100±15Ω

[Differential (Input/Output)Return loss SDD11/SDD22]

Return loss(f)≥  10                            0.01≤f﹤4.1

6.3-13log₁₀(f/ 5.5)   4.1≤f≤11.1

Where

f                         is the frequency in GHz Return loss(f)   is the return loss at frequency f

0.01GHz≤f≤11.1GH

z

SFF-8431 Rev.4.1

[Differential Insertion Loss (S_DD21 Max.)]

(Differential InsertionLoss Max. For TPa to TPb

Excluding Test fixture )

10MHz≤f ≤5GHz

F

AWG

0.6GHz

1.25GHz

2.5GHz

5.0GHz

30AWG(1m)Max.

2dB

3dB

4.5dB

7.5dB

30 AWG(2m)Max.

4dB

5dB

7dB

10dB

28AWG（3m)Max.

4dB

5.5dB

7.5 dB

12dB

26AWG(5m)Max.

5.5dB

7dB

10dB

16.0dB

24AWG(7m&10m

)Max.

6.5dB

10dB

14dB

21dB

[MDNEXT(multiple disturber

near-end crosstalk)]

≥26dB

10MHz≤f ≤5GHz

[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

（ITEM）

（REQUIREMENT）

（TEST CONDITON）

[Low Level Contact Resistance]

70milliohms 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]

DC 500V 1 minute disruptive discharge.

EIA-364-20:Apply a voltage of 500 VDC for 1minute between adjacent terminals

And between adjacent terminals and

ground.

（ITEM）

（REQUIREMENT）

（TEST CONDITON）

[Operating Temp.

Range]

-20°C to +75°C

Cable operating temperature range.

[Storage Temp.

Range

(in packed condition)]

-25°C to +65°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.

（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.(QSFP+)

18N Max.(SFP+)

Per SFF8432 Rev 5.0.

Cable plug Extraction

30N Max. (QSFP28)

12.5N Max. (SFP28)

Measure without the aid of any cage kick-out springs. Place axial load on

de-latch to de-latch plug. Per SFF-8432

Rev 5.0.

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)