Ascent Communication Technology

800G OSFP to 4x200G Breakout ACC

The OSP8-4OSP2 ACC is a high-performance 800Gbps Active Copper Breakout Cable (ACC) designed for next-generation InfiniBand NDR and high-speed Ethernet data center networks. The cable provides a direct breakout from one 800G OSFP port to four 200G OSFP ports, enabling flexible connectivity between high-density switches and compute nodes in AI and HPC environments. This active copper cable supports PAM4 signaling at up to 106.25Gbps per lane, delivering a total bandwidth of 800Gbps over copper links up to 5 meters. Integrated linear equalization technology ensures signal integrity and stable transmission across high-speed copper interconnects while maintaining low latency and low power consumption, making it suitable for latency-sensitive applications such as GPU clusters and AI training fabrics. The OSP8-4OSP2 ACC is compliant with OSFP MSA specifications and supports InfiniBand NDR architectures, enabling seamless integration with modern high-performance switches and servers. It supports auto-negotiation and link training, ensuring reliable link establishment and optimal performance in high-density data center deployments.

· Module compliant to OSFP MSA

· InfiniBand NDR compatible

· Transmission data rate up to PAM4 106.25Gbps per channel

· Low power consumption

· Linear PAM4 programmable equalizer optimized for 56GBaud copper link up to max length 5M on 25AWG

· Enable Auto-Negotiation and Link Training

· Low latency<10ps

· Supports device programming by MCU with I2C

· Power supply 3.3V

· 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			V
Common-mode to common-mode return loss	SCC11/22	RLCC)≥18 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