This product is a parallel 400Gb/s Quad Small Form Factor Pluggable--double density (QSFP-DD) optical module. It provides increased port density and total system cost savings.
This product is a parallel 400Gb/s Quad Small Form Factor Pluggable--double density (QSFP-DD) optical module. It provides increased port density and total system cost savings.
Transceiver Block Diagram
Figure 1. Transceiver Block Diagram
Optical interface and Pin Assignment
The electrical pinout of the QSFP-DD module is shown as Figure 2. And Figure 3 shows the optical interface of MPO-16.
Figure 3. MPO-16 Optical Connector Interface
Pin Definition
|
Pin |
Logic |
Symbol |
Deion |
Plug Sequence |
|
1 |
|
GND |
Ground |
1B |
|
2 |
CML-I |
Tx2n |
Transmitter Inverted Data Input |
3B |
|
3 |
CML-I |
Tx2p |
Transmitter Non-Inverted Data Input |
3B |
|
4 |
|
GND |
Ground |
1B |
|
5 |
CML-I |
Tx4n |
Transmitter Inverted Data Input |
3B |
|
6 |
CML-I |
Tx4p |
Transmitter Non-Inverted Data Input |
3B |
|
7 |
|
GND |
Ground |
1B |
|
8 |
LVTTL-I |
ModSelL |
Module Select |
3B |
|
9 |
LVTTL-I |
ResetL |
Module Reset |
3B |
|
10 |
|
VccRx |
+3.3V Power Supply Receiver |
2B |
|
11 |
LVCMOS-
I/O |
SCL |
2-wire serial interface clock |
3B |
|
12 |
LVCMOS-
I/O |
SDA |
2-wire serial interface data |
3B |
|
13 |
|
GND |
Ground |
1B |
|
14 |
CML-O |
Rx3p |
Receiver Non-Inverted Data Output |
3B |
|
15 |
CML-O |
Rx3n |
Receiver Inverted Data Output |
3B |
|
16 |
GND |
Ground |
1B |
|
|
17 |
CML-O |
Rx1p |
Receiver Non-Inverted Data Output |
3B |
|
18 |
CML-O |
Rx1n |
Receiver Inverted Data Output |
3B |
|
19 |
|
GND |
Ground |
1B |
|
20 |
|
GND |
Ground |
1B |
|
21 |
CML-O |
Rx2n |
Receiver Inverted Data Output |
3B |
|
22 |
CML-O |
Rx2p |
Receiver Non-Inverted Data Output |
3B |
|
23 |
|
GND |
Ground |
1B |
|
24 |
CML-O |
Rx4n |
Receiver Inverted Data Output |
3B |
|
25 |
CML-O |
Rx4p |
Receiver Non-Inverted Data Output |
3B |
|
26 |
|
GND |
Ground |
1B |
|
27 |
LVTTL-O |
ModPrsL |
Module Present |
3B |
|
28 |
LVTTL-O |
IntL |
Interrupt |
3B |
|
29 |
|
VccTx |
+3.3V Power supply transmitter |
2B |
|
30 |
|
Vcc1 |
+3.3V Power supply |
2B |
|
31 |
LVTTL-I |
InitMode |
Initialization mode; In legacy QSFP applications, the InitMode
pad is called LPMODE |
3B |
|
32 |
|
GND |
Ground |
1B |
|
33 |
CML-I |
Tx3p |
Transmitter Non-Inverted Data Input |
3B |
|
34 |
CML-I |
Tx3n |
Transmitter Inverted Data Input |
3B |
|
35 |
|
GND |
Ground |
1B |
|
36 |
CML-I |
Tx1p |
Transmitter Non-Inverted Data Input |
3B |
|
37 |
CML-I |
Tx1n |
Transmitter Inverted Data Input |
3B |
|
38 |
|
GND |
Ground |
1B |
|
39 |
|
GND |
Ground |
1A |
|
40 |
CML-I |
Tx6n |
Transmitter Inverted Data Input |
3A |
|
41 |
CML-I |
Tx6p |
Transmitter Non-Inverted Data Input |
3A |
|
42 |
|
GND |
Ground |
1A |
|
43 |
CML-I |
Tx8n |
Transmitter Inverted Data Input |
3A |
|
44 |
CML-I |
Tx8p |
Transmitter Non-Inverted Data Input |
3A |
|
45 |
|
GND |
Ground |
1A |
|
46 |
|
Reserved |
For future use |
3A |
|
47 |
|
VS1 |
Module Vendor Specific 1 |
3A |
|
48 |
|
VccRx1 |
3.3V Power Supply |
2A |
|
49 |
|
VS2 |
Module Vendor Specific 2 |
3A |
|
50 |
|
VS3 |
Module Vendor Specific 3 |
3A |
|
51 |
|
GND |
Ground |
1A |
|
52 |
CML-O |
Rx7p |
Receiver Non-Inverted Data Output |
3A |
|
53 |
CML-O |
Rx7n |
Receiver Inverted Data Output |
3A |
|
54 |
|
GND |
Ground |
1A |
|
55 |
CML-O |
Rx5p |
Receiver Non-Inverted Data Output |
3A |
|
56 |
CML-O |
Rx5n |
Receiver Inverted Data Output |
3A |
|
57 |
|
GND |
Ground |
1A |
|
58 |
|
GND |
Ground |
1A |
|
59 |
CML-O |
Rx6n |
Receiver Inverted Data Output |
3A |
|
60 |
CML-O |
Rx6p |
Receiver Non-Inverted Data Output |
3A |
|
61 |
|
GND |
Ground |
1A |
|
62 |
CML-O |
Rx8n |
Receiver Inverted Data Output |
3A |
|
63 |
CML-O |
Rx8p |
Receiver Non-Inverted Data Output |
3A |
|
64 |
|
GND |
Ground |
1A |
|
65 |
|
NC |
No Connect |
3A |
|
66 |
|
Reserved |
For future use |
3A |
|
67 |
|
VccTx1 |
3.3V Power Supply |
2A |
|
68 |
|
Vcc2 |
3.3V Power Supply |
2A |
|
69 |
|
Reserved |
For Future Use |
3A |
|
70 |
|
GND |
Ground |
1A |
|
71 |
CML-I |
Tx7p |
Transmitter Non-Inverted Data Input |
3A |
|
72 |
CML-I |
Tx7n |
Transmitter Inverted Data Input |
3A |
|
73 |
|
GND |
Ground |
1A |
|
74 |
CML-I |
Tx5p |
Transmitter Non-Inverted Data Input |
3A |
|
75 |
CML-I |
Tx5n |
Transmitter Inverted Data Input |
3A |
|
76 |
|
GND |
Ground |
1A |
Recommended Power Supply Filter
Figure 4. Recommended Power Supply Filter
Absolute Maximum Ratings
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
|
Parameter |
Symbol |
Min |
Max |
Units |
Notes |
|
Storage Temperature |
TS |
-40 |
85 |
degC |
|
|
Operating Case Temperature |
TOP |
0 |
70 |
degC |
|
|
Power Supply Voltage |
VCC |
-0.5 |
3.6 |
V |
|
|
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 with OM3 |
D |
0.5 |
|
100 |
m |
2 |
Notes:
1. FEC provided by host system.
2. FEC required on host system to support maximum distance.
Electrical Characteristics
The following electrical acteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter
Test
Point
Min
Typical
Max
Units
Notes
Power Consumption
12
W
Supply Current
Icc
3.63
A
Transmitter (each Lane)
Signaling Rate, each Lane
TP1
26.5625 ± 100 ppm
GBd
Differential pk-pk Input Voltage Tolerance
TP1a
900
mVpp
1
Differential Termination Mismatch
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
DC Common Mode Input Voltage
TP1
-350
2850
mV
3
Receiver (each Lane)
Signaling Rate, each lane
TP4
26.5625 ± 100 ppm
GBd
Differential Peak-to-Peak Output Voltage
TP4
900
mVpp
AC Common Mode Output Voltage, RMS
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.
|
Parameter |
Symbol |
Min |
Typical |
Max |
Units |
Notes |
|
Transmitter |
||||||
|
Center Wavelength |
λC |
840 |
850 |
860 |
nm |
|
|
Data Rate, each Lane |
|
26.5625 ± 100 ppm |
GBd |
|
||
|
Modulation Format |
|
PAM4 |
|
|
||
|
RMS Spectral Width |
∆λrms |
|
|
0.6 |
nm |
Modulated |
|
Average Launch Power, each Lane |
PAVG |
-6.5 |
|
4 |
dBm |
1 |
|
Outer Optical Modulation
Amplitude (OMAouter), each Lane |
POMA |
-4.5 |
|
3 |
dBm |
2 |
|
Launch Power in OMAouter minus TDECQ, each Lane |
|
-5.9 |
|
|
dB |
|
|
Transmitter and Dispersion Eye Clouser for PAM4, each Lane |
TDECQ |
|
|
4.5 |
dB |
|
|
Extinction Ratio |
ER |
3 |
|
|
dB |
|
|
Optical Return Loss
Tolerance |
TOL |
|
|
12 |
dB |
|
|
Average Launch Power of OFF Transmitter, each Lane |
Poff |
|
|
-30 |
dBm |
|
|
Encircled Flux |
|
≥ 86% at 19 μm
≤ 30% at 4.5 μm |
|
|
||
|
Receiver |
||||||
|
Center Wavelength |
λC |
840 |
850 |
860 |
nm |
|
|
Data Rate, each Lane |
|
26.5625 ± 100 ppm |
GBd |
|
||
|
Modulation Format |
|
PAM4 |
|
|
||
|
Damage Threshold, each Lane |
THd |
5 |
|
|
dBm |
3 |
|
Average Receive Power, each
Lane |
|
-7.9 |
|
4 |
dBm |
4 |
|
Receive Power (OMAouter), each Lane |
|
|
|
3 |
dBm |
|
|
Receiver Sensitivity
(OMAouter), each Lane |
SEN |
|
|
-6.5 |
dBm |
5 |
|
Stressed Receiver Sensitivity
(OMAouter), each Lane |
SRS |
|
|
-3 |
dBm |
6 |
|
Receiver Reflectance |
RR |
|
|
-12 |
dB |
|
|
LOS Assert |
LOSA |
-30 |
|
|
dBm |
|
|
LOS De-assert |
LOSD |
|
|
-12 |
dBm |
|
|
LOS Hysteresis |
LOSH |
0.5 |
|
|
dB |
|
|
Stressed Conditions for Stress Receiver Sensitivity (Note 7) |
||||||
|
Stressed Eye Closure for PAM4 (SECQ), Lane under Test |
|
|
4 |
|
dB |
|
|
OMAouter of each Aggressor Lane |
|
|
3 |
|
dBm |
|
Notes:
1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength.
A transmitter with launch power below this value cannot be compliant; however,
a value above this does not ensure compliance.
2. Even if the TDECQ < 1 dB, the OMAouter (min) must exceed the minimum value specified here.
3. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal having this average power level.
4. 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.
5. Receiver Sensitivity OMAouter, each lane (max) is informative and is defined for a BER of 2.4x10-4.
6. Measured with conformance test signal at receiver input for the BER of 2.4x10-4.
7. These test conditions are for measuring stressed receiver sensitivity. They are not acteristics of the receiver.
Digital Diagnostic Functions
The following digital diagnostic acteristics are defined over the normal operating conditions unless otherwise specified.
|
Parameter |
Symbol |
Min |
Max |
Units |
Notes |
|
Temperature monitors 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.
Outline Drawing (mm)
| Ordering Information |
|---|
| Date | Version | Description | Download |
|---|---|---|---|
| 2024-04-29 | V1.0 | Datasheet_400G QSFP-DD SR8 850nm 100m_LA-OT-400G-SR8.pdf | |
| Photo | Model | Description |
|---|
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