Alpha Bridge AQSFP-DD-FR4

Features

  • QSFP-DD MSA compliant
  • 4 CWDM lanes MUX/DEMUX design
  • 100G Lambda MSA 400G-FR4 Specification compliant
  • Up to 2km transmission on single mode fiber (SMF) with FEC
  • 125Gb/s electrical interface (400GAUI-8)
  • Data Rate 106.25Gbps (PAM4) per channel
  • Maximum power consumption 12W
  • Duplex LC connector
  • Operating case temperature: 0°C ~70°C
  • RoHS compliant

Applications

  • Data Center Interconnect
  • 400G Ethernet
  • Infiniband interconnects
  • Enterprise networking

Description

This product is a 400Gb/s Quad Small Form Factor Pluggable-double density (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. Reversely, 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 center wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331nm as members of the CWDM wavelength grid defined in ITU-T G.694.2. It contains a duplex LC connector for the optical interface and a 76-pin connector for the electrical interface. To minimize the optical dispersion in the long-haul system, single-mode fiber (SMF) has to be applied in this module. Host FEC is required to support up to 2km fiber transmission.

The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP-DD Multi-Source Agreement (MSA). Type 2 it has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.

Absolute Maximum Ratings

Parameter Symbol Min Max Units Note
Storage Temperature Tst -40 85 °C  
Operating Case Temperature Top 0 70 °C  
Supply Voltage Vcc -0.5 3.6 V  
Humidity (non-condensation) RH 0 85 %  
Damage Threshold, each Lane THd 4.5   dBm  

Recommended Operating Conditions

Parameter Symbol Min Typical Max Unit Notes
Operating Case Temperature Tca 0   70 °C  
Supply Voltage Vcc 3.135 3.3 3.465 V  
Data Rate, each Lane fd   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   2 Km 2

Diagnostics Monitoring

Parameter Symbol Accuracy Unit Notes
Temperature monitor absolute error DMI_Temp ± 3 °C  
Supply voltage monitor absolute error DMI_VCC ± 0.1 V  
Channel RX power monitor absolute error DMI_RX_Ch ± 2 dB 1
Channel Bias current monitor DMI_Ibias_Ch ± 10% mA  
Channel TX power monitor absolute error DMI_TX_Ch ± 2 dB 1

Optical Characteristics

Parameter Symbol Min   Typical  Max Unit Notes
Center Wavelength L0 1264.5 1271 1277.5 nm       
L1 1284.5 1291 1297.5 nm
L2 1304.5 1311 1317.5
L3 1324.5 1331 1337.5
Data Rate, each Lane   53.125 ± 100 ppm   GBd
Modulation Format     PAM4      
Transmitter
Side-mode Suppression Ratio SMSR 30     dB    
Total Average Launch Power PT     9.3 dBm    
Average Launch Power, each Lane PAVG -3.3   3.5 dBm 1
Optical Modulation Amplitude (OMAouter), each Lane POMA -0.3   3.7 dBm 2
Launch Power in OMAouter minus TDECQ, each Lane   -1.7     dB For ER≧4.5dB
-1.6     dB For ER≦4.5dB
Transmitter and Dispersion Eye Closure 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  
RIN17.1 OMA RIN     -136 dB/Hz  
Optical Return Loss Tolerance TOL     17.1 dB  
Transmitter Reflectance RT     -26 dB  
Transmitter Transition Time       17 ps  
Average Launch Power of OFF Transmitter, each Lane Poff     -20 dBm  
Receiver
Damage Threshold, each Lane THd 4.5     dBm  
Average Receiver Power, each Lane   -7.3   3.5 dBm  
Receiver Power (OMAouter), each Lane       3.7 dBm  
Difference in Receiver Power between any Two Lanes (OMAouter)       4.1 dB    
Receiver Sensitivity (OMAouter), each Lane SEN Equation (1) dBm  
Stressed Receiver Sensitivity in OMAouter SRS     -2.6 dBm  1
Receiver Reflectance RR     -26 dB    
LOS Assert LOSA -20     dBm    
LOS De-assert LOSD     -10.3 dBm    
LOS Hysteresis     LOSH 0.5     dB    
Stressed Conditions for Stress Receiver Sensitivity (Note 8)
Stressed Eye Closure for PAM4 (SECQ), Lane under Test      3.4   dB    
SECQ-10*log10(Ceq), Lane under Test            3.4  dB    
OMAouter of each Aggressor Lane           1.5   dBm    

Electronical Characteristics

Parameter Symbol Min Typical Max Unit 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 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 IEEE802.3-2015 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)
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) mV
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

Pin Descriptions

PIN Logic Symbol Name/Description Note
1   GND Ground 1
2 CML-I Tx2n Transmitter inverted data input  
3 CML-I Tx2p Transmitter non-inverted data input  
4   GND Ground 1
5 CML-I Tx4n Transmitter inverted data input  
6 CML-I Tx4p Transmitter non-inverted data input  
7   GND Ground 1
8 LVTTL-I MoDSeIL Module Select  
9 LVTTL-I ResetL Module Reset  
10   VccRx +3.3v Receiver Power Supply 2
11 LVCMOS-I/O SCL 2-wire Serial interface clock  
12 LVCMOS-I/O SDA 2-wire Serial interface data  
13   GND Ground 1
14 CML-O RX3p Receiver non-inverted Data Output  
15 CML-O RX3n Receiver inverted Data Output  
16   GND Ground 1
17 CML-O Rx1p Receiver non-inverted Data Output  
18 CML-O Rx1n Receiver inverted Data Output  
19   GND Ground 1
20   GND Ground 1
21 CML-O Rx2n Receiver Inverted Data Output  
22 CML-O Rx2p Receiver Non-Inverted Data Output  
23   GND Ground 1
24 CML-O Rx4n Receiver Inverted Data Output  
25 CML-O Rx4p Receiver Non-Inverted Data Output  
26   GND Ground 1
27 LVTTL-O ModPrsL Module Present  
28 LVTTL-O IntL Interrupt  
29   VccTx +3.3v Power supply transmitter 2
30   Vcc1 +3.3v Power supply 2
31 LVTTL-I LPMode Low Power Mode 2
32   GND Ground 1
33 CML-I Tx3p Transmitter Non-Inverted Data Input  
34 CML-I Tx3n Transmitter Inverted Data Input  
35   GND Ground 1
36 CML-I Tx1p Transmitter Non-Inverted Data Input  
37 CML-I Tx1n Transmitter Inverted Data Input  
38   GND Ground 1
39   GND Ground 1
40 CML-I Tx6n Transmitter Inverted Data Input  
41 CML-I Tx6p Transmitter Non-Inverted Data Input  
42   GND Ground 1
43 CML-I Tx8n Transmitter Inverted Data Input  
44 CML-I Tx8p Transmitter Non-Inverted Data Input  
45   GND Ground 1
46   Reserved For future use  
47   VS1 Module Vendor Specific 1  
48   VccRx1 3.3V Power Supply  
49   VS2 Module Vendor Specific 2  
50   VS3 Module Vendor Specific 3  
51   GND Ground 1
52 CML-O Rx7p- Receiver Non-Inverted Data Output  
53 CML-O Rx7n Receiver Inverted Data Output  
54   GND Ground 1
55 CML-O Rx5p- Receiver Non-Inverted Data Output  
56 CML-O Rx5n Receiver Inverted Data Output  
57   GND Ground 1
58   GND Ground 1
59 CML-O Rx6n- Receiver Inverted Data Output  
60 CML-O Rx6p Receiver Non-Inverted Data Output  
61   GND Ground 1
62 CML-O Rx8n Receiver Inverted Data Output  
63 CML-O Rx8p Receiver Non-Inverted Data Output  
64   GND Ground 1
65   NC No connect 3
66   Reserved For future use 3
67   VccTx1 3.3V Power Supply 2
68   Vcc2 3.3V Power Supply 2
69 LVTTL-I ePPS Precision Time Protocol (PTP) reference clock input 3
70   GND Ground 1
71 CML-I Tx7p Transmitter Non-Inverted Data Input  
72 CML-I Tx7n Transmitter Inverted Data Input  
73   GND Ground 1
74 CML-I Tx5p Transmitter Non-Inverted Data Input  
75 CML-I Tx5n Transmitter Inverted Data Input  
76   GND Ground 1

Ordering Information

Model Number Part Number        Voltage Temperature
AQSFP-DD FR4 OPDY-S02-13-CB 3.3V 0°C to 70 °C
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