Ascent Communication Technology

200G QSFP56 SR4 850 nm 100 m

Ascent’s QSFP56-200G-SR01 QSFP56 Optical Transceiver Module is designed for 200GBASE Ethernet throughput over MPO-12 connectors using OM3 or OM4 multimode fiber (MMF) with a wavelength of 850 nm up to 100 m (70 m for OM3).

• Compliant with 200G-SR4 optical specifications

• Hot-pluggable QSFP form factor

• CMIS4.0 or SFF8636 compliant

• SFF-8679 compliant

• Compliant with IEEE 802.3cd

• Digital diagnostic functions

• 4x53.125 Gb/s electrical interface (200GAUI-4)

• Low power dissipation

• Operating case temperature: 0 °C to +70 °C

• Maximum link length of 70 m with MMF OM3, 100 m with MMF OM4

• Single MPO12 connector

• RoHS compliant

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit	Note
Power Supply Voltage	V_CC	‑0.3	3.6	V
Input Voltage	V_in	‑0.3	Vcc+0.3	V
Storage Temperature	T_st	‑40	85	°C
Case Operating Temperature	T_op	0	70	°C
Humidity	RH	10	85	%	(Non‑Condensing)
Receiver Damage Threshold, each lane	P_in	5		dBm
Maximum Power Consumption	P_max		4	W

Recommended Operating Conditions

Parameter	Symbol	Min.	Max.	Unit
Case Operating Temperature	Tcase	0	‑	70
Power Supply Voltage	V_CC	3.135	3.3	3.465

Note: Without air flow.

Optical Characteristics

Parameter	Min.	Typ.	Max.	Unit
Transmitter
Signaling Rate, each Lane (Range)	26.5625 ppm ± 100 ppm			GBd
Center Wavelength Range	840		860	nm
Modulation Format	PAM4
RMS Spectral Width			0.6	nm
Average Launch Power, each Lane	‑6.5		4	dBm
Outer Optical Modulation Amplitude (OMA_outer), each Lane	‑4.5		3	dBm
Launch Power in OMA_outer minus TDECQ	‑5.9			dBm
Transmitter and Dispersion Eye Closure for PAM4 (TDECQ), each Lane			4.5	dB
Extinction Ratio, each Lane	3			dB
Optical Return Loss Tolerance			12	dB
Encircled Flux	≥86% at 19um ≤30% at 4.5um
Receiver
Signaling Rate, each Lane (Range)	26.5625 ppm ± 100 ppm			GBd
Center Wavelength Range	840		860	nm
Modulation Format
Average Receive Power, each Lane	‑8.4		4	dBm
Receive Power, each Lane (OMA_outer)			3	dBm
Receiver Reflectance			‑12	dB
Stressed Receiver Sensitivity (OMA_outer), each Lane			‑3.4	dBm
Receiver Sensitivity (OMA_outer), each Lane	Max(‑6.5, SECQ‑7.9)			dBm
Stressed Eye Closure for PAM4 (SECQ), Lane Under Test		4.5		dB
SECQ – 10log10(Ceq) (Max.), Lane Under Test			4.5	dB