Applications
Features
RQDD-400G-FR4
400G QSFP-DD FR4 2km LC Optical Transceiver
This product is a 400Gb/s QSFP-DD optical module designed for 2km optical communication applications. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals and multiplexes them into a single channel for 400Gb/s optical transmission.
on the receiver side, the module optically de-multiplexes a 400Gb/s optical input into 4 channels of CWDM optical signals and converts them to 8 channels of 50Gb/s (PAM4) electrical output data.
The central wavelengths of the 4 CWDM channels are 1271,1291,1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G.694.2. Host FEC is required to support up to 2km fiber transmission.
The RQDD-400G-FR4 transceiver is based on proprietary FIBERWDM PLC technology, using surface mounted opto-electronic devices with no free space elements. The unique design of the optical engine facilitates unparalleled compactness while maintaining Telcordia robustness.
Absolute Maximum Ratings
|
Parameter |
Symbol |
Min |
Max |
Units |
|
Storage Temperature Range |
Tsrg |
-40 |
+85 |
℃ |
|
Supply Voltage |
Vcc |
0 |
4 |
V |
|
Relative Humidity |
RH |
10%to 90% non-condensing |
||
Operating Conditions
|
Parameter |
Symbol |
Min |
Max |
Units |
|
Storage Temperature Range |
Tsrg |
-40 |
+85 |
℃ |
|
Supply Voltage |
Vcc |
0 |
4 |
V |
|
Relative Humidity |
RH |
10%to 90% non-condensing |
||
Wavelength Lane Assignments
|
Transmitter Parameter |
Lane |
Min |
Typica |
Max |
Units |
|
Lane Wavelength Range |
Lane 0 Lane 1 Lane 2 Lane 3 |
1264.5 1284.5 1304.5 1324.5 |
1271 1291 1311 1331 |
1277.5 1297.5 1317.5 13375 |
nm nm nm nm |
Transmitter Optical Specifications
|
Transmitter Parameter |
Lane |
Min |
Typical |
Max |
Units |
|
Average launch Power per lane |
|
-3.3 |
|
3.5 |
dBm |
|
Total Average launch power |
|
|
|
9.3 |
dBm |
|
Dutter Optical Modulation Amplitude (OMA outer), each lane |
|
-0.3 |
|
3.7 |
dBm |
|
Difference in launch power between any two lanes (OMA outer) |
|
|
|
4 |
dB |
|
Average Launch Power per Lane @TX Off State |
|
|
|
-20 |
dBm |
|
Launch Power in OMA outer minus TDECQ, each Lane for ER ≥4.5dB for ER<4.5dB |
-1.7 -1.6 |
dBm |
|||
|
Transmitter and Dispersion Eye Closure for PAM4, each Lane |
|
|
|
3.4 |
dB |
|
Extinction Ratio |
|
3.5 |
|
|
dB |
|
Relative Intensity Noise (OMA) |
|
|
|
-136 |
dB/Hz |
|
Side-Mode Suppression Ration (SMSR) |
|
30 |
|
|
dB |
|
Optical Return Loss Tolerance |
|
|
|
17.1 |
dB |
|
Transmitter Reflectance |
|
|
|
-26 |
dB |
|
Transmitter Output Power Monitoring Accuracy |
|
-3 |
|
3 |
dB |
|
TDECQ-10*log10(Ceq), each Lane |
|
|
|
3.4 |
dB |
|
Transmitter transition time |
|
|
|
17 |
ps |
High Speed Electrical Specifications
|
Parameter |
Min |
Typical |
Max |
Units Notes |
|
|
Receiver electrical output characteristics at TP4 |
|||||
|
Signaling rate per lane |
|
26.5625 |
|
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 |
70 |
|
|
mV |
|
|
Far-end ESMW (Eye symmetry mask width) |
|
0.2 |
|
UI |
|
|
Far-end Eye height, differential |
30 |
|
|
mV |
|
|
Far-end pre-cursor ISl ratio |
-4.5 |
|
2.5 |
% |
|
|
Differential output return loss |
9.5-0.37f |
|
|
dB |
0.01-8GHz |
|
4.75-7.4log 10 (f/14) |
|
|
dB |
8-19 GHz |
|
|
Common to differential mode conversion return loss |
22-20(f/25.78) |
|
|
dB |
0.01-12.89GHz |
|
15-6log 10 (f/25.78) |
|
|
dB |
12.89-19 GHz |
|
|
Differential termination mismatch |
|
|
10 |
% |
|
|
Transition time (min,20%to 80%) |
9.5 |
|
|
ps |
|
|
DC common mode voltage |
-350 |
|
2850 |
mV |
|
|
Transmitter electrical input characteristics at TP1 |
|||||
|
Signaling rate, per lane |
|
26.5625 |
|
GBd |
|
|
Differential pk-pk input voltage tolerance |
900 |
|
|
mV |
|
|
Differential input return loss |
9.5-0.37f |
|
|
dB |
0.01-8GHz |
|
4.75-7.4log 10 (f/14) |
|
|
dB |
8-19 GHz |
|
|
Differential to common mode input return loss |
22-20(f/25.78) |
|
|
dB |
0.01-12.89GHz |
|
15-6log 10 (f/25.78) |
|
|
dB |
12.89-19 GHz |
|
|
Differential termination mismatch |
|
|
10 |
% |
|
|
Module stressed input test |
Per Section 120E.3.4.1 IEEE802.3bs |
|
|
|
|
|
Single-ended voltage tolerance range |
-0.4 |
|
3.3 |
V |
|
|
Common-mode voltage |
-350 |
|
2850 |
mV |
|
Receiver Output Power Thresholds for Loss of Signal (LOS)
|
Parameter |
Min |
Typica Max |
Units |
|
|
RX_LOS_Assert Min/Max |
-20.0 |
|
dBm |
|
|
RX_LOS_De-Assert Min/Max |
|
|
dBm |
|
|
RX_LOS_Hysteresis |
0.5 |
|
dB |
|
Digital Diagnostic Monitoring Specifications
|
Parameters |
Unit |
Specification |
|
Temperature Monitor absolute error |
degC |
±3 |
|
Voltage Monitor absolute error |
% |
±5 |
|
_bias Monitor absolute error |
% |
±10 |
|
Received Power (Rx)Monitor absolute error |
dB |
±3.0 |
|
Transmit Power (Tx)Monitor absolute error |
dB |
±3.0 |
QSFP-DD Edge Connector and Pinout Description
The electrical pinout of the QSFP-DD module is shown in Figure 2 below.
Figure 1. Host PCB QSFP-DD pad assignment top view
Mechanical Specifications
Ordering information
|
Part Number |
Description |
|
RQDD-400G-FR4 |
400G QSFP-DD FR4 Optical Transceiver |
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