Ascent Communication Technology

800G OSFP ACC Cable

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	Typ	Max	Unit
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
Power Supply Voltage	V_CC	3.1	3.3	3.5	V
Input Amplitude
Input LOW Voltage	VIL

High-Speed Specifications

Parameter	Symbol	Min	Typ	Max	Unit
Raw Cable Impedance	Z_ca	90	100	110	ohm
Mated Connector Impedance	Z_mated	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			dB
Differential to Common-Mode Conversion Loss	SCD21-S DD21	For 0.05 ≤f ≤40 GHz, Where f is the frequency in GHz			dB
Common-Mode to Common-Mode Return Loss	SCC11/22	` For 0.05 ≤f ≤40 GHz, Where f is the frequency in GHz			dB
Minimum COM	COM	3			dB
Minimum Cable Assembly ERL	ERL	8.25			dB
BER				2.4x10^-4