Cisco Compatible QSFP DD DR4 400Gbps 500m MPO MTP SMF Optical Transceiver

Cisco compatible QSFP-DD DR4 MPO/MTP 400Gbps 500m SMF Optical Transceiver

QSFP-DD DR4 S-QD4A31M05-CD-4 230301.pdf



Ordering information

Part Number Product Description
S-QD4A31M05-CD-4

QSFP-DD 400G 1310nm DR4 500M SMF MPO, 0ºC~+70ºC, With DDM



Description

Springtek 400Gb/s QSFP-DD DR4 optical module designed for 500m optical
communication applications. S-QD4A31M05-CD-4 module converts 8 channels of
50Gb/s (PAM4) electrical input data to 4 channels of parallel optical
signals, each capable of 100Gb/s operation for an aggregate data rate of
400Gb/s. Reversely, on the receiver

side, the module converts 4 channels of parallel optical signals of 100Gb/s
each channel for an aggregate data rate of 400Gb/s into 8 channels of 50Gb/s
(PAM4) electrical output data.

An optical fiber cable with an MTP/MPO-12 connector can be plugged into the
Springtek 400Gb/s QSFP-DD DR4 module receptacle.Proper alignment is ensured
by the guide pins inside the receptacle.The cable usually cannot be twisted
for proper channel to channel alignment.Electrical connection is achieved
through an QSFP-DD MSA-compliant edge type connector.

The product is designed with form factor, optical/electrical connection and
digital diagnostic interface according to the QSFP-DD Multi-Source Agreement



Features

QSFP-DD MSA compliant
Parallel 4 Optical Lanes
IEEE 802.3bs 400G-DR4 Specification compliant
Up to 500m transmission on single mode fiber (SMF) with FEC
Operating case temperature: 0 to 70oC
8x53.125Gb/s electrical interface(400GAUI-8)
Data Rate 106.25Gbps (PAM4) per channel.
Maximum power consumption 12W
MPO-12 connector
RoHS compliant
Applications

400G Ethernet
Infiniband interconnects
Data Center Enterprise networking


Absolute Maximum Ratings

It hasto be noted that the operation in excess of any individual absolute
maximum ratings might cause permanent damage to this module.

Parameter Symbol Min Typ Max Unit
Power Supply Voltage Vcc -0.5 3.6 V
Storage Temperature Range Ts -40 85 °C
Operating Case Temperature To 0 70 °C
Relative Humidity (non-condensation) RH 0 85 %


Recommended Operating Conditions and Power Supply Requirements

Parameter Symbol Min Typical Max Units Notes
Operating Case Temperature TOP 0 70 degC
Power Supply Voltage VCC 3.135 3.3 3.465 V
Data Rate, each Lane 26.5625 GBd PAM4
Data Rate Accuracy -100 100 ppm
Pre-FEC Bit Error Ratio 2.4x10-4
Post-FEC Bit Error Ratio 1x10-12 1
Link Distance D 0.002 500 m 2


Electrical Characteristics

The following electrical characteristics are defined over the Recommended
Operating Environment unless otherwise specified.

Parameter Test oint Min Typical Max Units Notes
Power Consumption 12 W
Supply Current Icc 3.64 A
Transmitter (each Lane)
Signaling Rate, each Lane TP1 26.5625 ± 100 ppm GBd
Differential pk-pk Input Voltage Tolerance

Mismatch

TP1a 900 mVpp 1
Differential Termination TP1 10 %
Differential Input Return Loss TP1
IEEE 802.3-2015

Equation (83E-5)

dB
Differential to Common Mode
Input Return Loss TP1 IEEE 802.3-2015
Equation (83E-6) dB
Module Stressed Input Test TP1a
See IEEE 802.3bs

120E.3.4.1

2
Single-ended Voltage

Tolerance Range (Min)

TP1a -0.4 to 3.3 V
Near-end Eye Height, Differential TP1 -350 2850 mV
3
Receiver (each Lane)
Far-end Eye Height, Differential TP4 26.5625 ± 100 ppm GBd
Differential Peak-to-Peak

Output Voltage

TP4 900 mVpp
AC Common Mode Output Voltage (Vcm) TP4 17.5 mV
Differential Termination

Mismatch

TP4 10 %
Differential Output Return Loss



TP4
IEEE 802.3-2015

Equation(83E-2)


Common to Differential Mode Conversion

Return Loss

TP4
IEEE 802.3-2015

Equation(83E-3)


Transition Time, 20% to 80%



TP4 9.5 ps
Near-end Eye Symmetry Mask Width

(ESMW)

TP4 0.265 UI
Near-end Eye Height,Differential TP4 70 mV
Far-end Eye Symmetry Mask Width

(ESMW)

TP4 0.2 UI
Far-end Eye Height,Differential TP4 30 mV
Far-end Pre-cursor ISI Ratio TP4 -4.5 2.5 %
Common Mode Output Voltage (Vcm) TP4 -350 2850 mV
3
Notes:

1. With the exception to IEEE 802.3bs 120E.3.1.2 that the pattern is PRBS31Q
or scrambled idle.

2. Meets BER specified in IEEE 802.3bs 120E.1.1.

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



Optical Characteristics

Parameter Symbol Min Typical Max Units Notes
Center Wavelength λc 1304.5 1310 1317.5 nm
Transmitter
Data Rate, each Lane 53.125 ± 100 ppm GBd
Modulation Format PAM4
Side-mode Suppression Ratio SMSR 30 dB
Average Launch Power, each Lane PAVG -2.9 4 dBm 1
Outer Optical Modulation Amplitude

(OMAouter),each Lane

POMA -0.8 4.2 dBm 2
Launch Power in OMAouter minus

TDECQ, each Lane

for ER ≥ 4.5dB

for ER < 4.5dB






-2.2

-1.9

dB
Transmitter and Dispersion Eye Clouser for

PAM4, each Lane

TDECQ 3.4 dB
TDECQ – 10*log10(Ceq), each Lane 3.4 dB
3
Extinction Ratio ER 3.5 dB
Difference in Launch Power

between any Two Lanes(OMAouter)

4 dB
RIN15.6OMA RIN -136 dB/Hz
Optical Return Loss Tolerance TOL 21.4 dB
Average Launch Power of

OFF Transmitter, each Lane

Poff -26 dBm
Transmitter Transition Time 17 ps
Average Launch Power of OFF

Transmitter, each Lane

Poff -15 dBm
Receiver
Data Rate, each Lane 53.125 ± 100 ppm GBd
Modulation Format PAM4
Damage Threshold, each Lane THd 5 dBm 4
Average Receive Power, each Lane -5.9 4 dBm
5
Receive Power (OMAouter), each Lane 4.2 dBm
Receiver Sensitivity (OMAouter),

each Lane

SEN
Equation

(1)

dBm 6
Stressed Receiver Sensitivity SRS -1.9 dBm 7
Receiver Reflectance RR -26 dB
LOS Assert LOSA -15 dBm
LOS De-assert LOSD -8.9 dBm
LOS Hysteresis LOSH 0.5 dB
Stressed Conditions for Stress Receiver Sensitivity (Note 7)
Stressed Eye Closure for
PAM4 (SECQ), Lane under Test 3.4 dB
SECQ – 10*log10(Ceq), Lane nder Test 3.4 dB
OMAouter of each Aggressor Lane 4.2 dBm

Digital Diagnostic Functions

The following digital diagnostic characteristics are defined over the normal
operating conditions unless otherwise specified.

Parameter Symbol Min Max Units Notes
Temperature monitor absolute error DMI_Temp -3 3 degC
Over operating
temperature range
Supply voltage monitor absolute error DMI _VCC -0.1 0.1 V
Over full operating
range
Channel RX power monitor absolute error DMI_RX_Ch -2 2 dB
1
Channel Bias current monitor DMI_Ibias_Ch -10% 10% mA
Channel TX power monitor absolute error DMI_TX_Ch -2 2 dB
1
Notes:

1. Due to measurement accuracy of different fibers, there could be an
additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy.

Click to Enlarge