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400G QSFP-DD SR8 100m

400G QSFP-DD SR8 100m

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.

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

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.


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