100Gbps QSFP28 To 4x 25G SFP28 Compatible Direct Attach Copper Twinax Passive Cable

Description ：

100G QSFP28 is based on a 4X25G or 4X28G structure, meeting the needs of next-generation 100G switches, servers, routers and other product applications. The QSFP28 cable assembly uses an optimized design to reduce crosstalk and insertion loss, has excellent signal integrity, and fully complies with the next-generation 100G Ethernet and InfiniBand EDR standards.

SFP28 is based on SFP+ equivalent form factor, supports 25G Ethernet standard, can provide 25Gb/s error-free transmission, and is used in high-density 25G Ethernet switches and network interfaces. 100G QSFP28 To 4x25G SFP28 supports two interface device interconnection, single channel The transmission rate is 25Gbps.

Features

Enhanced EMI / EMC performance
Compliant with the IEEE 802.3bj Infiniband EDR specifications
Meets SFF-8636、SFF-8402
Support serial ID function through EEPROM
30AWG to 26AWG cable available
RoHS

Applications :

10G/25G/40G /100g Ethernet

Infiniband SDR, DDR, QDR, FDR, EDR

Switches, routers, data centers, cloud servers

Electrical Performance：

（Signal Integrity）

（ITEM）		（REQUIREMENT）	（TEST CONDITION）
	Cable	105+5/-10Ω
	Impedance	105+5/-10Ω
（Differe	Paddle Card	100±10Ω	Rise time of 25ps
ntial	Impedance	100±10Ω	(20 % - 80 %).
Impedan	Cable
ce）	Termination	100±15Ω
	Impedance
		Return_loss(f)≥ 16.5-2√f 0.05≤f﹤4.1 10.66-14log10(f/ 5.5) 4.1≤f≤19 Where f is the frequency in GHz Return loss(f) is the return loss at frequency f
[Differential (Input/Output)Return			10MHz≤f ≤19GHz
loss SDD11/SDD22]
[Differential to common-mode (Input/Output)Return loss SCD11/SCD22]		Return_loss(f)≥ 22-(20/25.78)f 0.01≤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	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

[Differential Insertion Loss (S_DD21 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)

Max.

4.5dB

5.4dB

6.3dB

7.5dB

8.5dB

10.5dB

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(S_CD21-S_DD21)

10 0.01≤f﹤12.89

Conversion _loss(f) – IL(f)≥ 27-(29/22)f 12.89 ≤ 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)]

≥26dB @12.89GHz

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 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