400G QSFP56 Passive DAC Direct Attach Copper Cable

ITEM

REQUIREMENT

TEST CONDITION

(Differential Impedance)

Cable Impedance

100±5Ω

Rise time of 25ps

(20 % - 80 %).

Paddle Card Impedance

100±10Ω

Cable Termination Impedance

100+10/-15Ω

[Differential (Input/Output)Return loss S_DD11/S_DD22]

                                 Return_loss(f)≥ 16.5-2√f                       0.05≤f﹤4.1

                                                         10.66-14log₁₀(f/ 5.5)    4.1≤f≤1

Where

f is the frequency in GHz

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

10MHz≤f ≤26.5GHz

[Differential to common-mode (Input/Output)Return loss S_CD11/S_CD22]

                     Return_loss(f)≥22-10(f/25.78)        0.05≤f﹤12.89

                                             15-(6/25.78)f          12.89≤f≤19

Where

f is the frequency in GHz

Return_loss(f) is the Differential to common-mode return loss at frequency f

50MHz≤f ≤26.5GHz

[Common-mode to Common-mode

(Input/Output)Return loss S_CC11/S_CC22]

Return_loss(f)≥2dB            0.05≤f≤19

Where

f is the frequency in GHz

Return_loss(f) is the common-mode to common-mode return loss at frequency f

50MHz≤f ≤26.5GHz

[Differential Insertion Loss (S_DD21 Max.)]

(Differential InsertionLoss Max. For TPa to TPb Excluding Test fixture )

50MHz≤f ≤26.5GHz

Insertion _loss(f)≥-17.16dB 0.05≤f≤13.28GHz

Where f is the frequency in GHz

Insertion Loss (f) Differential Insertion Loss at frequency f

[Insertion Loss Deviation]

-0.176*f - 0.7 ≤ ILD ≤ 0.176* f + 0.7

50MHz≤f ≤26.56GHz

Differential to common-mode Conversion Loss-Differential Insertion Loss(S_CD21-S_DD21)

                         Conversion _loss(f) – IL(f)≥10                 0.05≤f﹤12.89

                                                                 14-0.3108f       12.89≤f﹤26.5

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

50MHz≤f ≤26.5GHz

[MDNEXT(multiple disturber

near-end crosstalk)]

≥35dB @26.5GHz

10MHz≤f ≤26.5GHz

[Intra Skew]

10ps/m,

10MHz≤f ≤19

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]

NO disruptive discharge.

EIA-364-20:Apply a voltage of 300 VDC for 1minute between adjacent terminals

And between adjacent terminals and ground.

ITEM

REQUIREMENT

TEST CONDITON

[Operating Temp. Range]

0°C to +70°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.

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

125 N Min.

No evidence of physical damage

No functional damage to module, connector, or cage with latching mechanism activated.

Per OSFP _Specification_Rev5_0 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.(55N)

Per OSFP _Specification_Rev5_0 5.0

Module to be inserted into connector and cage with latch mechanism engaged.

(55N if the cage has riding heatsink)

Cable plug Extraction

30N Max. (45N)

Per OSFP _Specification_Rev5_0 5.0

Module to be removed from connector and cage with latching mechanism disengaged.

(45N if the cage has riding heatsink)

Durability

Module:50 cycles,

Connector/Cage Cycles : 100 cycles

No evidence of physical damage

Per OSFP _Specification_Rev5_0 5.0,

Number of cycles for an individual module, to be tested with cage, connector, and module; latches may be locked out during testing