Alpha Bridge SFP AQSFP28-100G-CWDM4

Features

  • QSFP28 MSA compliant
  • 4 CWDM lanes MUX/DEMUX design
  • Supports 103.1Gb/s aggregate bit
  • 100G CWDM4 MSA Technical Spec Rev1.1
  • Up to 2km transmission on single mode fiber (SMF)with FEC
  • Operating case temperature: 0 to 70℃
  • 4x25G electricalinterface (OIF CEI-28G-VSR)
  • Maximum power consumption 3.5W
  • LC duplex connector
  • RoHScompliant

Applications

  • Data Center Interconnect.
  • 100G Ethernet.
  • InfiniBand QDR and DDR interconnects.
  • Enterprise networking.

Absolute Maximum Ratings AQSFP28-100G

Parameter Symbol Min. Max. Units Note
Storage Temperature Ts -40 85 °C  
Power Supply Voltage Vcc -0.5 3.6 V  
  Relative Humidity(non-condensation)   RH   0   85   %  
Damage Threshold, each Lane THd 5.5   dBm  
Operating Case Temperature Top 0 70 °C  

Recommended Operating Conditions AQSFP28-100G

Parameter Symbol Min. Typ. Max. Units
Operating Case Temperature Top 0   70 ℃
Power Supply Voltage Vcc 3.135 3.3 3.465 V
Data Rate, each Lane     25.78125   Gb/s
Data Rate Accuracy   -100   100 ppm
Control Input Voltage High   2   Vcc V
Control Input Voltage Low   0   0.8 V
Link Distance with G.652 D 0.002   10 km

Diagnostics Monitoring AQSFP28-100G

Parameter Symbol Accuracy Unit Notes
Temperature monitor absolute error   DMI_Temp ± 3 ℃ Over operating temperature range
  Supply voltage monitor absolute error   DMI_VCC   ± 0.1   V Over full operating range
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

Notes: Due to measurement accuracy of different single mode fibers, there could be an additional +/-1 dB fluctuation, ora +/- 3 dB total.

Transmitter Electro-optical Characteristics AQSFP28-100G

Parameter Test Point Min Typ. Max Units Notes
Power Consumption       3.5 W  
Supply Current Icc     1.06 A  
Overload Differential Voltage pk-pk TP1a 900     mV  
Common Mode Voltage (Vcm) TP1 -350   2850 mV 1
Differential Termination Resistance Mismatch TP1     10 % At 1MHz
Differential Return Loss (SDD11) TP1     See CEI-x28G-VSR Equation 13-19 dB  
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11)     TP1       See CEI- 28G-VSR Equation 13-20   dB  
  Stressed Input Test   TP1a     See CEI- 28G-VSR Section 13.3.11.2.1    
Lane Wavelength L0 1264.5 1271 1277.5 nm  
L1 1284.5 1291 1297.5 nm  
L2 1304.5 1311 1317.5 nm  
L3 1324.5 1331 1337.5 nm  
Total Average Launch Power PT     8.5 dBm  
Average Launch Power, each Lane PAVG -6.5   2.5 dBm  
Optical Modulation Amplitude (OMA), each Lane POMA -4   2.5 dBm 2   2
Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane       -5         dBm  
TDP, each Lane TDP     3 dB  
Extinction Ratio ER 3.5     dB  
Optical Return Loss Tolerance TOL     20 dB  
Transmitter Reflectance RT     -12 dB  
Average Launch Power OFF Transmitter, each Lane   Poff       -30 dBm  
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}   {0.31, 0.4, 0.45, 0.34, 0.38, 0.4} 3
  • Notes: Vcm is generated by the host. Specification includes effects of ground offset.
  • Even if the TDP < 0 dB, the OMA min must exceed the minimum value specified here.
  • Hit ratio 5×10-5.

Receiver Electro-optical Characteristics (each Lane) AQSFP28-100G

Parameter Test Point Min Typ. Max Units Notes
Differential Voltage, pk-pk TP4     900 mV  
Common Mode Voltage (Vcm) TP4 -350   2850 mV 1
Common Mode Noise, RMS TP4     17.5 mV  
Differential Termination Resistance   TP4       10     % At 1MHz
Mismatch
Differential Return Loss (SDD22)     TP4     See CEI- 28G- VSREquation 13-19     dB  
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC22, SCD22)   TP4         See CEI-28G-VSR equation 13-21       dB  
Common Mode Return Loss (SCC22) TP4       -2   dB 2
Conditions of Stress Receiver Sensitivity Test (Note 5)
Vertical Eye Closure Penalty, each Lane       1.9     dB  
Stressed Eye J2 Jitter, each Lane       0.33   UI  
Stressed Eye J4 Jitter, each Lane       0.48     UI  
SRS eye mask definition {X1, X2, X3, Y1, Y2, Y3} {0.39, 0.5, 0.5, 0.39, 0.39, 0.4}
  • Notes: Vcm is generated by the Specification includes effects of ground offset voltage.
  • From 250MHz to 30 GHz.
  • The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input signal having this power level on one lane. The receiver does not have to operate correctly at this input.
  • Measured with conformance test signal for BER = 5×10-5.
  • Vertical eye closure penalty, stressed eye J2 jitter, stressed eye J4 jitter, and SRS eye mask definition are test conditions for measuring stressed receiver They are not characteristics of the receiver.

Block Diagram of Transceiver

  • This product is a transceiver module designed for 2km optical communication applications. The design is compliant to 1000GBASE CWDM4 MSA standard. The module converts 4 inputs channels (ch) of 25Gb/selectrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 100Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 100Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical 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. It contains a duplex LC connector for the optical interface and a 38-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 accordingto the QSFP28 Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.
  • This product converts the 4-channel 100Gb/s electrical input data into CWDM optical signals (light), by a driven4- wavelength Distributed Feedback Laser (DFB) array. The light is combined by the MUX parts as a 100Gb/s data, propagating out of the transmitter module from the SMF. The receiver module accepts the 100Gb/s CWDM optical signals input, and de-multiplexes it into 4 individual 25Gb/s channels with different wavelength. Each wavelength light is collected by a discrete photo diode, and then outputted as electric data after amplifiedby a TIA and a post amplifier. Figure 1 shows the functional block diagram of this product.
  • A single +3.3V power supply is required to power up this product. Both power supply pins VccTx and VccRx are internally connected and should be applied concurrently. As per MSA specifications the module offers 7 lowspeed hardware control pins (including the 2-wire serial interface): ModSelL, SCL, SDA, ResetL, LPMode, ModPrsL and IntL.
  • Module Select (ModSelL) is an input pin. When held low by the host, this product responds to 2-wire serial communication commands. The ModSelL allows the use of this product on a single 2-wire interface bus – individual ModSelL lines must be used.
  • Serial Clock (SCL) and Serial Data (SDA) are required for the 2-wire serial bus communication interface andenable the host to access the QSFP+ memory map.
  • The ResetL pin enables a complete reset, returning the settings to their default state, when a low level on the ResetL pin is held for longer than the minimum pulse length. During the execution of a reset the host shall disregard all status bits until it indicates a completion of the reset interrupt. The product indicates this by postingan IntL (Interrupt) signal with the Data_Not_Ready bit negated in the memory map. Note that on power up (including hot insertion) the module should post this completion of reset interrupt without requiring a reset.
  • Low Power Mode (LPMode) pin is used to set the maximum power consumption for the product in order toprotect hosts that are not capable of cooling higher power modules, should such modules be accidentally inserted.
  • Module Present (ModPrsL) is a signal local to the host board which, in the absence of a product, is normallypulled up to the host Vcc. When the product is inserted into the connector, it completes the path to ground through a resistor on the host board and asserts the signal. ModPrsL then indicates its present by setting ModPrsL to a “Low” state.
  • Interrupt (IntL) is an output pin. “Low” indicates a possible operational fault or a status critical to the host system. The host identifies the source of the interrupt using the 2-wire serial interface. The IntL pin is an opencollector output and must be pulled to the Host Vcc voltage on the Host board.

Pin Descriptions AQSFP28-100G

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 output  
4   GND Ground 1
5 CML-I Tx4n Transmitter inverted Data Input  
6 CML-I Tx4p Transmitter Non-Inverted Data output  
7   GND Ground 1
8 LVTLL-I ModSeIL Module Select  
9 LVTLL-I ResetL Module Reset  
10   VccRx +3.3V Power Supply Receiver 2
11 LVCMOS-I/O SCL 2-Wire Serial Interface Clock  
12 LVCMOS-I/O SDA 2-Wire Serial Interface Data  
13   GNC Ground  
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 1
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  
32   GND Ground 1
33 CML-I Tx3p Transmitter Non-Inverted Data Input  
34 CML-I Tx3n Transmitter Inverted Data Output  
35   GND Ground 1
36 CML-I Tx1p Transmitter Non-Inverted Data Input  
37 CML-I Tx1n Transmitter Inverted Data Output  
38   GND Ground 1
  • Note: GND is the symbol for signal and supply (power) common for QSFP28 modules. All are common within the QSFP28 module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal common ground.
  • VccRx, Vcc1 and VccTx are the receiving and transmission power suppliers and shall be applied concurrently. Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the QSFP28 transceiver modulein any combination. The connector pins are each rated for a maximum current of 1000mA.

Ordering information AQSFP28-100G

  Model Number   Part Number   Voltage   Temperature
AQSFP28-100G-CWDM4-2KM OPCW-S40-13-CR 3.3V 0°C to 70 °C
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