Ascent Communication Technology

QSFP28 100G AOC Cable

ASCENT 100G QSFP28 Active Optical Cable is a high-performance integrated cable suitable for high-speed core network and data center applications.

• Full duplex 4 channel 850 nm parallel active optical cable

• Up to 27.952 Gbps data rate per channel

• Maximum link length of 150 m links on OM3 multi-mode fiber

• High reliability 850 nm VCSEL technology

• Electrically hot-pluggable

• Case operating temperature range: 0 °C to +70 °C

• Power dissipation < 2.5 W per cable end

• Compliant to QSFP28 MSA

• RoHS Compliant

Absolute Maximum Ratings

Recommended Operating Conditions

General Product Characteristics

Parameter	Description	Notes
Module Form Factor	QSFP28
Number of Lanes	4 Tx /Rx
Maximum Aggregate Data Rate	111.8 Gb/s
Maximum Data Rate per Lane	27.952 Gb/s
Standard Cable Lengths	3 m, 5 m, 7 m, 10 m	Other lengths, please contact sales
Protocols Supported	Typical applications include Infiniband, Fiber Channel, 100G Ethernet
Electrical Interface and Pin‑out	38‑pin edge connector	Pin‑out as defined by the QSFP28 MSA
Standard Optical Cable Type	Multimode ribbon fiber cable assembly, riser‑rated
Maximum Power Consumption	2.5 W per end
Management Interface	Serial, I2C‑based, 400 kHz maximum frequency	As defined by the QSFP28 MSA

Note: 100G Ethernet &100GBASE‑SR4 and ITU‑T OTU4 has different register settings, not auto‑negotiation

High‑speed Electrical Characteristics per Lane

Parameter‑Inputs	Symbol	Min.	Typ.	Max.	Unit	Notes
Input Electrical sSecifications (per Lane)
Differential Voltage pk‑pk				900	mV
Common Mode Noise RMS				17.5	mV
Differential Termination Resistance Mismatch				10	%
Differential Return Loss	SDD22	Per OIF CEI‑28G‑VSR and CAUI‑4 requirements
Common Mode to Differential Conversion and Differential to Common Mode Conversion	SDC22, SCD22				dB
	SDC22, SCD22				dB
Common Mode Return Loss	SCC22				dB
Transition Time, 20 to 80 %	Tr, Tf	10			ps
Common Mode Voltage	Vcm	‑0.3		2.8	V
Eye Width at 1E‑15 probability	EW15	0.46			UI
Eye Height at 1E‑15 probability	EH15	94			mV
Output Electrical Specifications (per Lane)
Differential Voltage pk‑pk				900	mV
Common Mode Voltage	Vcm	‑350		2850	mV
Common Mode Noise RMS				17.5	mV
Differential Termination Resistance Mismatch				10	%
Differential Return Loss	SDD22	Per OIF CEI‑28G‑VSR and CAUI‑4 requirements			dB
Common Mode to Differential Conversion and Differential to Common Mode Conversion	SDC22, SCD22				dB
	SDC22, SCD22				dB
Common Mode Return Loss	SCC22				dB
Output Rise and Fall time (20 % to 80 %)	tRH, tFH	9.5			ps
Vertical Eye Closure	VEC			5.5	dB
Eye Width at 1E‑15 probability	EW15	0.57			UI