400G QSFP-DD to 4×100G QSFP56 Passive Direct Attach Copper Twinax Cable (DAC)

SPECIFICATIONS
Cable End Connector A	QSFP-DD	Cable End Connector B	4×QSFP56
Jumper Type	Active Optical Breakout Cable	Data Rate	400G
Aggregate Bit Rate	400Gbps	Lane Bit Rate	50Gbps
Number of Channels	8	Single Channel Rate	50G
Minimum Bend Radius	5X Cable OD -Single, 10X Cable OD - Repeated	Factory Brand	PHILISUN
Attenuation	28AWG:10dB/7m maximum 30AWG:8.4dB/5.5m maximum	Bit Error Rate	≤10-12
Shield	Braid/Foil	Wire AWG	28AWG/30AWG
Cable Type	Passive Twinax	Cable OD	30AWG: 7.0mm 28AWG: 8.2mm
Cable Colour/Material	Black PVC(OFNR)	Cable Length Selection	0.5-3meter
Protocols	SFF 8665/QSFP-DD MSA/QSFP56 MSA/SFF8436/CMIS Rev 4.0/IEEE 802.3cd/IEEE802.3bj/SFF8679/	Application Scenarios	400Gigabit Ethernet (400GbE)
Supply Voltage	3.3V	Power Dissipation	<0.1W
Operating Temperature	0 to 70℃ (32 to 158℉)	Storage Temperature	-40 to 85℃ (-40 to 185℉)

PRODUCT PRESENTATION

The PHILISUN 400G QSFP-DD to 4x100G QSFP56 Passive Direct Attach Copper Twinax Cable (DAC) provides a powerful High-Density Breakout solution, splitting a 400G QSFP-DD port into four independent 100G QSFP56 links. Compliant with the QSFP-DD MSA, IEEE 802.3bj, and IEEE 802.3cd standard, this Passive Copper DAC Cable ensures stable and reliable performance. It delivers Ultra-Low Latency for short-reach Server Interconnects and is the most Cost-Effective way to connect Switch to Switch fabrics and accelerate data paths from Switch to GPU nodes in HPC environments.

DAC SERIES PRODUCTS

PRODUCTION & TESTING EQUIPMENT

Pin connection

Pin No.	P1 (QSFP-DD)		P2 (QSFP)
	Pin	Signal	Pin	Signal
1	18	RX1n	37	TX1n(QSFP-1)
	17	RX1p	36	TX1p(QSFP-1)
2	36	TX1p	17	RX1p(QSFP-1)
	37	TX1n	18	RX1n(QSFP-1)
3	21	RX2n	2	TX2n(QSFP-1)
	22	RX2p	3	TX2p(QSFP-1)
4	3	TX2p	22	RX2p(QSFP-1)
	2	TX2n	21	RX2n(QSFP-1)
5	15	RX3n	37	TX1n(QSFP-2)
	14	RX3p	36	TX1p(QSFP-2)
6	33	TX3p	17	RX1p(QSFP-2)
	34	TX3n	18	RX1n(QSFP-2)
7	24	RX4n	2	TX2n(QSFP-2)
	25	RX4p	3	TX2p(QSFP-2)
8	6	TX4p	22	RX2p(QSFP-2)
	5	TX4n	21	RX2n(QSFP-2)
9	56	RX5n	37	TX1n(QSFP-3)
	55	RX5p	36	TX1p(QSFP-3)
10	74	TX5p	17	RX1p(QSFP-3)
	75	TX5n	18	RX1n(QSFP-3)
11	59	RX6n	2	TX2n(QSFP-3)
	60	RX6p	3	TX2p(QSFP-3)
12	41	TX6p	22	RX2p(QSFP-3)
	40	TX6n	21	RX2n(QSFP-3)
13	53	RX7n	37	TX1n(QSFP-4)
	50	RX7p	36	TX1p(QSFP-4)
14	71	TX7p	17	RX1p(QSFP-4)
	72	TX7n	18	RX1n(QSFP-4)
15	62	RX8n	2	TX2n(QSFP-4)
	63	RX8p	3	TX2p(QSFP-4)
16	44	TX8p	22	RX2p(QSFP-4)
	43	TX8n	21	RX2n(QSFP-4)

Electrical Performance Requirements

Test Items	Test Condition	Specification
Current	–	0.5A per Contact
Voltage	–	30 vDC per Contact
LLCR	EIA 364-23, 20mVdc, 100mA	Less Than 2 ohms.
Insulation Resistance	100 Vdc	10 Mohms Minimum between Adjacent Contacts
Dielectric Withstanding Voltage	300 VDC Minimum for 1 Minutes	No Defect or Breakdown between Adjacent Contacts
Temperature Rise	Measure the Temperature Rise at the Rated Current after 96 hours(45 minutes ON/15 minutes OFF per hour).	Temperature Rise: +30℃ MAX.
Continuity	Verify the Continuous Electrical Path	No Open, Short, or High Resistance.

SI Requirements

Test Items	Specification	Notes
SDD21&SDD12	-17.16 dB Min. @13.28 GHz	From 0.01 GHz- 19GHz
SDD11&SDD22	-16.5+2sqrt(f)dB Max. @0.05GHz~4.1GHz -10.66+14log(f/5.5)dB Max.@4.1GHz~10GHz	From 0.01 GHz- 19GHz
SCD21-SDD21	-10 dB Max. @0.01 GHz~12.89 GHz-27+(29/22)*f dB Max. @12.89 GHz~15.7 GHz -6.3 dB Max. @15.7 GHz~19 GHz	From 0.01 GHz- 19GHz

Pin Function Definitions

Test Items	Test Condition	Specification
Mating Forces	A rate of 10mm per minute	QSFP-DD<90N, QSFP<60N
Un-mating Forces	A rate of 10mm per minute	QSFP-DD<50N,QSFP<30N
Latch strength	Pull to separate module from cage , Test with connector, cage & module (latch engaged)	Minimum of an 125N force
Bulk cable retention in module	Pull to separate bulk cable from module,Test with cable assembly only	Minimum of an 90N force
Wire Flex	Flex cable 180 for 10 cycles at X/Y axis, 20 times/minutes, with an 1kg suspended weight. Type C EIA 364-41, test condition I.	No microsecond discontinuities are allowed.
Durability	Perform 50 unplug/plug cycles	No evidence of physical damage
Cable Minimum Bend Radius	The cable is bent on time over the correct mandrel with 5 perpendicular, the Minimum bend Radius is 10x OD.	1.No physical damage 2.Verify continuity and SI