Name: 400G QSFP-DD SR8 100m
Brand: T&S Communication Co, Ltd.

The QSFP28 100G-CWDM4-2km module is a highly integrated 4x25G transceiver focused on reach, bandwidth, density and cost for high port-count 100G systems, and client-side 100G interfaces. It is compliant with the 100G 4WDM-10 MSA, which is based on the CWDM4 MSA version 1.1. It is interoperable with CWDM4 transceivers over a 2 km reach.

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400G QSFP-DD SR8 100m Specification Download

Specifications of 400G QSFP-DD SR8 100m

Absolute Maximum Ratings

Recommended Operating Environment

Electrical Characteristics

Transmitter Specifications – Optical

Receiver Specifications – Optical

General Specifications

Parameters	Symbol	Min.	Max.	Unit	Ref.
Power Supply Voltage	VCC	-0.5	+3.6	V	-
Storage Temperature	Tc	-40	+85	°C	-
Relative Humidity	RH	15	85	%	1

Notes:

1. Non-condensing.

Parameter	Symbol	Min	Typical	Max	Unit
Power Supply Voltage	VCC	3.15	3.30	3.45	V
Supply current	Icc	-	-	2898	mA
Operating Case Temperature	Tca	0	-	70	°C

Parameter	Symbol	Min.	Typical	Max	Unit	Ref.
Transmitter
Signaling rate per lane	-	26.5625± 100 ppm			GBd	-
Differential peak-peak input voltage tolerance	Vin	900	-	-	mV	1
Differential input return loss	-	Per equation (83E–5) IEEE802.3bm			-	-
Differential to common mode input return loss	-	Per equation (83E–6) IEEE802.3bm			-	-
Differential termination mismatch	-	-	-	10	%	-
Module stress input test	-	Per 120E.3.4.1 IEEE802.3bs			-	2
Single-ended voltage tolerance range	-	-0.4	-	3.3	V
DC common mode voltage	-	-350	-	2850	mV	3
Receiver
Signaling rate per lane	-	26.5625± 100 ppm.			GBd	-
AC common-mode output voltage (RMS)	-	-	-	17.5	mV	-
Differential peak-to-peak output voltage	-	-	-	900	mV	-
Near-end ESMW (Eye symmetry mask width)	-	0.265			UI	-
Near-end Eye height, differential (min)	-	70	-	-	mV	-
Far-end ESMW (Eye symmetry mask width)	-	0.2			UI	-
Far-end Eye height, differential (min)	-	30	-	-	mV	-
Differential output return loss	-	Per equation 83E-2 IEEE802.3bm			-	-
Common to differential mode conversion return loss	-	Per equation 83E-3 IEEE802.3bm			-	-
Differential termination mismatch	-	-	-	10	%	-
Transition time (min, 20% to 80%)	-	9.5	-	-	ps	-
DC common mode voltage	-	-350	-	2850	mV	3

Notes:

1. With the exception to 120E.3.1.2 that the pattern is PRBS31Q or scrambled idle.

2. Meets specified BER

3. DC common mode voltage generated by the host. Specification includes effects of ground offset voltage.

Parameter	Symbol	Min	Typical	Max	Unit	Ref.
Signaling Speed per Lane	-	26.5625 ± 100ppm			GBd	1
Modulation format	-	PAM4			-	-
Center Wavelength	λ	840	850	860	nm	-
RMS spectral width	∆λ	-	-	0.6	nm	1
Average Launch Power per Lane	Po	-6.5	-	4	dBm	-
Outer Optical Modulation Amplitude (OMAouter), each lane	OMA	-4.5	-	3	dBm	2
Launch power in OMAouter minus TDECQ, each lane	-	-5.9	-	-	dBm	-
Transmitter and dispersion eye closure for PAM4 (TDECQ), each lane	-	-	-	4.5	dB	-
TDECQ – 10log10(Ceq), each lane	-	-	-	4.5	dB	3
Extinction Ratio	ER	3	-	-	dB	-
Optical Return Loss Tolerance	ORL	-	-	12	dB	-
Encircled Flux	FLX	> 86% at 19 um < 30% at 4.5 um			-	4
Average launch power of OFF transmitter, each lane	-	-	-	-30	dBm	-

Notes:

1. RMS spectral width is the standard deviation of the spectrum.

2. Even if the TDECQ < 1.4 dB, the OMAouter (min) must exceed this value.

3. Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.

4. If measured into type A1a.2 or type A1a.3, or A1a.4, 50 μm fiber, in accordance with IEC 61280-1-4.

Parameter	Symbol	Min	Typical		Max		Unit	Ref.
Signaling Rate per Channel	DR	26. 5625 ± 100ppm					GBd	-
Modulation format	-	PAM4					-	-
Center Wavelength	λ	840	850		860		nm	-
Damage Threshold	DT	5					dBm	1
Average receive power, each lane	RXPOW	-8.4	-		4		dbm	2
Receive power (OMAouter), each lane	RxOMA	-	-		3		dBm	-
Stressed Receiver Sensitivity (OMA) per Lane	SRS	-	-		-3.4		dBm	3
Stressed eye closure for PAM4 (SECQ), lane under test	-	4.5					dB	4
SECQ – 10log10(Ceq)f, each lane (max)	-	4.5					dB	4
OMAouter of each aggressor lane	-	3					dBm	-
LOS De-Assert	Lda	-		-		-9	dBm	-
LOS Assert	Lsa	-30		-		-	dBm	-
LOS Hysteresis	Lh	0.5		-		-	dB	-

Notes:

1. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level on one lane. The receiver does not have to operate correctly at this input power.

2. Average receive power, each lane (min) is informative and not the principal indicator of signal strength. A received power below this value cannot be compliant; however, a value above this does not ensure compliance.

3. Measured with conformance test signal at TP3 (see IEEE 802.3cd 138.8.10) for the BER specified in 138.1.1.

4. Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.

Parameter	Symbol	Min	Typical	Max	Unit	Ref.
Bit Rate (all wavelengths combined)	BR	-	-	425	Gb/s	1
Bit Error Ratio (pre-FEC)	BER	-	-	2.4E-4	-	2
Maximum Supported Distances
Fiber Type	-	-	-	-	-	-
OM3 MMF	LMAX1	-	-	70	m	-
OM4 MMF	LMAX2	-	-	100	m	-

Notes:

1. Supports 400GBASE-SR8 per IEEE P802.3cm.

2. As defined by IEEE P802.3cm.