SPECIFICATIONS
Cable End Connector A	OSFP(FTL)	Cable End Connector B	2×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: 6.9mm 28AWG: 7.9mm
Cable Colour/Material	Black PVC(OFNR)	Cable Length Selection	0.5-3 meter
Protocols	OSFP MSA/CMIS Rev4.0/IEEE 802.3cd/SFF-8436/SFF-8665/SFF-8679/SFF-8636	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 OSFP to 2x200G QSFP56 Passive Direct Attach Copper Twinax Cable (DAC) is an essential Breakout Cable, providing a Cost-Effective way to split a 400G OSFP port into two 200G QSFP56 links, maximizing port Density. The Finned Top design enhances cooling in HPC environments. This Passive Copper solution is highly Power-Efficient and delivers Low Latency. Compliant with OSFP MSA, CMIS Rev4.0, and IEEE 802.3cd standard, it supports scalable Switch to Switch aggregation and high-throughput connections from Switch to GPU systems in modern AI Clusters.

DAC SERIES PRODUCTS

PRODUCTION & TESTING EQUIPMENT

PERFORMANCE PARAMETER

Absolute Maximum Ratings
Parameters	Symbol	Min.	Max.	Unit
Operating Voltage	Vcc	3.135	3.465	V
Operating Temperature	–	0	+70	℃
Storage Temperature	Ts	-40	+85	℃
Humidity Operating	RH	–	85	%

OSFP pin definitions

QSFP56 pin definitions

Pin Connection

PairNo.	P1(OSFP)		P2(QSFP)
	Pin	Signal	Pin	Signal
1	28	RX1n	37	TX1n(QSFP-1)
	29	RX1p	36	TX1p(QSFP-1)
2	59	TX1p	17	RX1p(QSFP-1)
	58	TX1n	18	RX1n(QSFP-1)
3	33	RX2n	2	TX2n(QSFP-1)
	32	RX2p	3	TX2p(QSFP-1)
4	2	TX2p	22	RX2p(QSFP-1)
	3	TX2n	21	RX2n(QSFP-1)
5	25	RX3n	34	TX3n(QSFP-1)
	26	RX3p	33	TX3p(QSFP-1)
6	56	TX3p	14	RX3p(QSFP-1)
	55	TX3n	15	RX3n(QSFP-1)
7	36	RX4n	5	TX4n(QSFP-1)
	35	RX4p	6	TX4p(QSFP-1)
8	5	TX4p	25	RX4p(QSFP-1)
	6	TX4n	24	RX4n(QSFP-1)
9	22	RX5n	37	TX1n(QSFP-2)
	23	RX5p	36	TX1p(QSFP-2)
10	53	TX5p	17	RX1p(QSFP-2)
	52	TX5n	18	RX1n(QSFP-2)
11	39	RX6n	2	TX2n(QSFP-2)
	38	RX6p	3	TX2p(QSFP-2)
12	8	TX6p	22	RX2p(QSFP-2)
	9	TX6n	21	RX2n(QSFP-2)
13	19	RX7n	34	TX3n(QSFP-2)
	20	RX7p	33	TX3p(QSFP-2)
14	50	TX7p	14	RX3p(QSFP-2)
	49	TX7n	15	RX3n(QSFP-2)
15	42	RX8n	5	TX4n(QSFP-2)
	41	RX8p	6	TX4p(QSFP-2)
16	11	TX8p	25	RX4p(QSFP-2)
	12	TX8n	24	RX4n(QSFP-2)

Electrical Performance Requirements

Test Items	Test Conditions	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 atthe 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 to 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 to 19GHz
SCD21-SDD21	-10 dB Max. @0.01 GHz~12.89 GHz -27+(29/22)*fdB Max. @12.89 GHz~15.7 GHz -6.3 dB Max. @15.7 GHz~19 GHz	From 0.01 GHz to 19GHz

Mechanical Performance Requirements

Test Items	Test Condition	Specification
Mating Forces	A rate of 10mm per minute	OSFP<40N, QSFP<60N
Un-mating Forces	A rate of 10mm per minute	OSFP<30N,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 atX/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 bendRadius is 10x OD.	No physical damage， Verify continuity and SI

PRODUCT CERTIFICATION

COMPATIBLE BRANDS

CONFIGURATION INFORMATION

400G OSFP(FIN) to 2×200G QSFP56 Passive Direct Attach Copper Twinax Cable (DAC)

Related products

400G OSFP(FTL) to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable (DAC)

400G OSFP(FTL) to OSFP(FTL) Passive Direct Attach Copper Twinax Cable (DAC)