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

Features of 400G QSFP-DD SR8 100m

Hot-pluggable QSFP-DD form factor
Power dissipation < 10W
Maximum link length of 100m on OM4 fiber with KP4 FEC
8x50Gb/s PAM4 VCSEL transmitter
8x50G PAM4 retimed 400GUAI-8 electrical interface aligned with IEEE 802.3bs
I2C management interface
MPO-16 APC connector
Operating case temperature: 0℃~+70℃
RoHS6 compliant (lead free)

Applications of 400G QSFP-DD SR8 100m

400G 100m on OM4 with FEC

Specifications of 400G QSFP-DD SR8 100m

Absolute Maximum Ratings

Recommended Operating Environment

Electrical Characteristics

Transmitter Specifications – Optical

Receiver Specifications – Optical

General Specifications

These values represent the damage threshold of the module. Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.

Parameters	Symbol	Min.	Max.	Unit
Power Supply Voltage	VCC	-0.5	+3.6	V
Storage Temperature	Tc	-40	+85	°C
Relative Humidity1	RH	15	85	%

Notes:

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
Transmitter
Signaling rate per lane	-	26.5625± 100 ppm			GBd
Differential peak-peak input voltage tolerance1	Vin	900	-	-	mV
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 test2	-	Per 120E.3.4.1 IEEE802.3bs			-
Single-ended voltage tolerance range	-	-0.4	-	3.3	V
DC common mode voltage3	-	-350	-	2850	mV
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 voltage3	-	-350	-	2850	mV

Notes:

With the exception to 120E.3.1.2 that the pattern is PRBS31Q or scrambled idle.
Meets specified BER
DC common mode voltage generated by the host. Specification includes effects of ground offset voltage.

Parameter	Symbol	Min	Typical	Max	Unit
Signaling Speed per Lane1	-	26.5625 ± 100ppm			GBd
Modulation format	-	PAM4			-
Center Wavelength	λ	840	850	860	nm
RMS spectral width1	∆λ	-	-	0.6	nm
Average Launch Power per Lane	Po	-6.5	-	4	dBm
Outer Optical Modulation Amplitude (OMAouter), each lane2	OMA	-4.5	-	3	dBm
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 lane3	-	-	-	4.5	dB
Extinction Ratio	ER	3	-	-	dB
Optical Return Loss Tolerance	ORL	-	-	12	dB
Encircled Flux4	FLX	> 86% at 19 um < 30% at 4.5 um			-
Average launch power of OFF transmitter, each lane	-	-	-	-30	dBm

Notes:

RMS spectral width is the standard deviation of the spectrum.
Even if the TDECQ < 1.4 dB, the OMAouter (min) must exceed this value.
Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.
If measured into type A1a.2 or type A1a.3, or A1a.4, 50μm fiber, in accordance with IEC 61280-1-4.

Parameter	Symbol	Min	Typical	Max	Unit
Signaling Rate per Channel	DR	26. 5625 ± 100ppm			GBd
Modulation format	-	PAM4			-
Center Wavelength	λ	840	850	860	nm
Damage Threshold1	DT	5			dBm
Average receive power, each lane2	RXPOW	-8.4	-	4	dbm
Receive power (OMAouter), each lane	RxOMA	-	-	3	dBm
Stressed Receiver Sensitivity (OMA) per Lane3	SRS	-	-	-3.4	dBm
Stressed eye closure for PAM4 (SECQ), lane under test4	-	4.5			dB
SECQ – 10log10(Ceq)f, each lane (max)4	-	4.5			dB
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:

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.
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.
Measured with conformance test signal at TP3 (see IEEE 802.3cd 138.8.10) for the BER specified in 138.1.1.
Ceq is a coefficient defined in 121.8.5.3, which accounts for the reference equalizer noise enhancement.

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

Notes:

Supports 400GBASE-SR8 per IEEE P802.3cm.
As defined by IEEE P802.3cm.