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    25Gbps SFP28 Passive High Speed Cable

    25Gbps SFP28 Compatible Direct Attach Copper Twinax Passive Cable

    25Gbps SFP28 Compatible Direct Attach Copper Twinax Passive Cable, fully tested compatible for over 100 vendors.
    Compatible Device: Cisco SFP-H25G-CU1M, Cisco SFP-H25G-CU2M, Cisco SFP-H25G-CU3M, Cisco SFP-H25G-CU4M, Cisco SFP-H25G-CU5M

    Features:
    • Single channel data rate of 25Gbps
    • Compliant with SFP + MSA and SFF-8432 compliant
    • Compliant with IEEE 802.3 and FCoE
    • Enhanced EMI / EMC performance
    • Support serial ID function through EEPROM
    • Supports cable customization up to 5 meters
    • 30AWG to 26AWG cable available
    • RoHS and halogen-free options

    • Applications :
    • Switch / Router / HBA
    • Servers and storage devices
    • Data center network
    • Base station / BBU / RRU
    • Fiber Channel
    • 25Gbs Ethernet

     

    • Electrical Performance
      • Signal Integrity

     

     

     

    ITEM

     

    REQUIREMENT

    TEST CONDITION

     

    (Differe ntial Impedan ce)

    Cable

    Impedance

    105+5/-10Ω

     

     

     

    Rise time of 25ps (20 % - 80 %).

    Paddle Card

    Impedance

    100±10Ω

    Cable Termination

    Impedance

     

    100±15Ω

     

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

    16.5-2√f                              0.05f4.1

    Return_loss(f)≥

    10.66-14log10(f/ 5.5)        4.1f19

     

    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]

    22-(20/25.78)f     0.01f12.89

    Return_loss(f)≥

    15-(6/25.78)f       12.89f19

    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                                        0.2f19 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

     

    [Differential Insertion Loss (SDD21 Max.)]

    (Differential InsertionLoss Max. For TPa to TPb Excluding

    Test fixture )

     

     

     

     

    10MHz≤f ≤19GHz

     

    F AWG

     

     

    1.25GHz

     

     

    2.5GHz

     

     

    5.0GHz

     

     

    7.0GHz

     

     

    10Ghz

     

     

    12.89Ghz

    30(1m)

    4.5dB

    5.4dB

    6.3dB

    7.5dB

    8.5dB

    10.5dB

     

     

    Max.

     

     

     

     

     

     

     

    30/28(

    3m)Ma x.

     

     

    7.5dB

     

     

    9.5dB

     

     

    12.2dB

     

     

    14.8dB

     

     

    18.0dB

     

     

    21.5dB

    26(3m)

    Max.

     

    5.7dB

     

    7.2dB

     

    9.9 dB

     

    11.9dB

     

    14.1dB

     

    16.5dB

    26/25(

    5m)Ma x.

     

     

    7.8dB

     

     

    10.0dB

     

     

    13.5dB

     

     

    16.0dB

     

     

    19.0dB

     

     

    22.0dB

     

     

    Differential to common-mode Conversion Loss-Differential Insertion

    Loss(SCD21-SDD21)

    10                            0.01f12.89

    Conversion _loss(f) – IL(f)≥   27-(29/22)f          12.89f15.7

    6.3                          15.7f19

    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)]

     

    ≥26dB @12.89GHz

     

     

    10MHz≤f ≤19GHz

    [Intra Skew]

    15ps/m,

     

    10MHz≤f ≤19GHz

     

     

     

     

     

    • Other Electrical Performance

     

    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.

     

     

     

     

    • Environment Performance:

     

    ITEM

    REQUIREMENT

    TEST CONDITON

    [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.

     

     

     

     

     

    • Mechanical and Physical Characteristics

     

    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.

    Twist

    No evidence of physical

    Twist cable 180° (±90° from nominal

     

     

    Twist

    damage

    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

    18N Max.(SFP28)

    Per SFF-8432 Rev 5.0

     

    Cable plug Extraction

     

     

    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)

     

     

     


     

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