Ascent Communication Technology

OSFP 800G DAC Cable

800G OSFP DAC (Passive Direct Attach Copper) enables highbandwidth 800G links and supports 800G Ethernet rate. It provides an OSFP copper direct-attach solution. This cable is compliant with OSFP MSA (Multi-Source Agreement), IEEE 802.3ck and 400GBase-CR4 standards. This direct attach copper twinax cable is suitable for short-distance connectivity within a rack or between adjacent racks in data centers. The 800G OSFP DAC cable contains 16 (8 transmitting and 8 receiving) high-speed copper pairs, each operating at data rates of up to 106.25Gb/s, which are suitable for very short links and offer a cost-effective and power-efficient way to establish a 800-Gigabit link between OSFP ports of switches/routers within racks and across adjacent racks. The 800G OSFP DAC assembly is high-speed, cost-effective alternatives to OSFP optical modules in 800G Ethernet applications. It meets OSFP800 MSA, IEE802.3ck, 400GBaseCR4 standards. These high performance 800G OSFP-to-OSFP copper direct-attach cables are offered in lengths of 1, 1.5, and 2 meters.

· OSFP Module compliant to OSFP MSA

· Transmission data rate up to PAM4 106.25Gbps per channel

· Enable 800Gb/s Transmission

· Link length up to 3m

· Built-in EEPROM functions

· Operating case temperature 0°C to +70°C

· RoHS2.0 compliant

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Units	Note
Supply Voltage	V_cc	-0.3	3.3	3.6	V
Storage temperature	T_s	-40		85	°C
Operating Case temperature	T_c	0		70	°C
Humidity	Rh	5		85	%
Data Rate			800		Gbps

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit
Length	L	0.5		5	M
AWG		32		25	AWG
Jacket material	Hair Tail Technology Net, Gray

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit
Power supply voltage	V_CC	3.1	3.3	3.5	V
Input Amplitude		800		1200	mVpp
Input LOW Voltage	VIL	-0.3		0.35*V_CC	V
Input HIGH Voltage	VIH	0.65* V_CC		V_CC +0.3	V
Output Logic LOW	VOL			0.25*V_CC	V
I2C Master Mode Output Frequency			400		kHz
800G end Power consumption			1.2	1.5	W
400G end Power consumption			0.3	0.4	W

High-Speed Specifications

Parameter	Symbol	Min.	Typ.	Max.	Unit
Raw cable impedance	Zca	90	100	110	ohm
Mated connector Impedance	Zmated	85		115	ohm
Maximum insertion Loss at 26.56 GHz	SDD21	11		19.75	dB
Differential to common-mode return loss	SCD11/22	For 0.05 =f =40 GHz, Where f is the frequency in GHz			V
Differential to common-mode conversion loss	SCD21-SDD21	For 0.05 =f =40 GHz, Where f is the frequency in GHz RLCC)≥18			V
Common-mode to common-mode return loss	SCC11/22	For 0.05 =f =40 GHz, Where f is the frequency in GH			kHz
Minimum COM	COM	3			dB
Minimum cable assembly ERL	ERL	8.25			dB
BER				2.4x10^-4