Alpha Bridge SFP AQSFP28-100G-SR4
Features
- QSFP28 MSA compliant
- Compliant to IEEE 802.3bm 100GBASE-SR4
- Four independent full-duplex channels
- Supports 103.1Gb/s aggregate bit rate
- Up to 100m OM4 MMF transmission
- Operating case temperature: 0 to 70℃
- Single 3.3V power supply
- 4x25G electrical interface (OIF CEI-28G-VSR)
- Maximum power consumption 2.5W
- MTP/MPO optical connector
- RoHS-6 compliant
Applications
- Rack to Rack.
- Data Center.
- InfiniBand QDR, DDR and SDR.
- 100G Ethernet.
Absolute Maximum Ratings AQSFP28-100G-SR4
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 | 3.4 | dBm | ||
Operating Case Temperature | Top | 0 | 70 | °C |
Recommended Operating Conditions AQSFP28-100G-SR4
Parameter | Symbol | Min. | Max. | Units | Typ. |
Case operating Temperature | Top | 0 | 70 | °C | |
Supply Voltage | Vcc | 3.135 | 3.465 | V | 3.3 |
Data Rate, each Lane | Gb/s | 25.78125 | |||
Data Rate Accuracy | -100 | 100 | ppm | ||
Pre-FEC Bit Error Ratio | 5x10-5 | ||||
Post-FEC Bit Error Ratio | 1x10-12 | 1 | |||
Control Input Voltage High | 2 | Vcc | V | ||
Control Input Voltage Low | 0 | 0.8 | V | ||
Link Distance (OM3 MMF) | D1 | 70 | m | ||
Link Distance (OM4 MMF) | D2 | 100 | m |
- Notes: FEC provided by host system.
- FEC required on host system to support maximum distance.
Transmitter Electro-optical Characteristics AQSFP28-100G-SR4
Parameter | Test Point | Min. | Typ. | Max. | Units | Note |
Power consumption | 2.5 | W | ||||
Supply Current | Icc | 757 | mA | |||
Overload Differential Voltage pk-pk | TP1a | 900 | mA | |||
Common Mode Voltage (Vcm) | TP1 | -350 | 2850 | mA | ||
Differential Termination Resistance Mismatch | TP1 | 10 | % | At 1 MHz | ||
Differential Return Loss (SDD11) | TP1 | See CEI-28G- 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 | ||||
Center Wavelength | λc | 840 | 850 | 860 | nm | |
RMS Spectral Width | △λrms | 0.6 | nm | |||
Average Launch Power, each Lane | PAVG | -8.4 | 2.4 | dBm | ||
Optical Modulation Amplitude (OMA), each Lane | POMA | -6.4 | 3 | dBm | 2 | |
Launch Power in OMA minus TDEC, each Lane | -7.3 | dBm | ||||
Transmitter and Dispersion Eye Closure (TDEC), each Lane | 4.3 | dB | ||||
Optical Return Loss Tolerance | TOL | 12 | dB | |||
Average Launch Power OFF,Transmitter, each Lane | Poff | -30 | dBm | |||
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} | {0.3, 0.38, 0.45, 0.35, 0.41, 0.5} | 3 |
Receiver Electro-optical Characteristics AQSFP28-100G-SR4
Parameter | Test Point | Min. | Typ. | Max. | Units | Note |
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 Mismatch | TP4 | 10 | % | At 1MHz | ||
Differential Return Loss (SDD22) | TP4 | See CEI- 28G- VSR Equation 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 | |||
Transition Time, 20 to 80% | TP4 | 9.5 | ps | |||
Vertical Eye Closure (VEC) | TP4 | 5.5 | dB | |||
Eye Width at 10-15 probability (EW15) | TP4 | 0.57 | UI | |||
Eye Height at 10-15 probability (EH15) | TP4 | 228 | mV | |||
Center Wavelength | λc | 840 | 850 | 860 | Nm | |
Damage Threshold, each Lane | THd | 3.4 | dBm | 3 | ||
Average Receive Power, each Lane | -10.3 | 2.4 | dBm | |||
Receive Power (OMA), each Lane | 3 | dBm | ||||
Receiver Sensitivity (OMA), each lane | SEN | -9.2 | dBm | BER=5x10-5 |
Block Diagram of Transceiver
- This product is a parallel 100Gb/s Quad Small Form-factor Pluggable (QSFP28) optical module. It provides increased port density and total system cost savings. The QSFP28 full-duplex optical module offers 4 independent transmit and receive channels, each capable of 25Gb/s operation for an aggregate data rate of 100Gb/s on 100 meters of OM4 multi-mode fiber.
- An optical fiber ribbon cable with an MTP/MPO connector can be plugged into the QSFP28 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 MSA-compliant 38-pin edge type connector.
- The module operates by a single +3.3V power supply. LVCMOS/LVTTL global control signals, such as Module Present, Reset, Interrupt and Low Power Mode, are available with the modules. A 2-wire serial interface is available to send and receive more complex control signals, and to receive digital diagnostic information.
- Individual channels can be addressed and unused channels can be shut down for maximum design flexibility.
- The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.
- This product converts parallel electrical input signals into parallel optical signals, by a driven Vertical Cavity Surface Emitting Laser (VCSEL) array. The transmitter module accepts electrical input signals compatible with Common Mode Logic (CML) levels. All input data signals are differential and internally terminated. The receiver module converts parallel optical input signals via a photo detector array into parallel electrical output signals. The receiver module outputs electrical signals are also voltage compatible with Common Mode Logic (CML) levels. All data signals are differential and support a data rates up to 25Gb/s per channel. Figure 1 shows the functional block diagram of this product.
- A single +3.3V power supply is required to power up the module. Both power supply pins VccTx and VccRx are internally connected and should be applied concurrently. As per MSA specifications the module offers 7 low speed 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, the module responds to 2-wire serial communication commands. The ModSelL allows the use of multiple QSFP28 modules on a single 2-wire interface bus – individual ModSelL lines for each QSFP28 module must be used.
- Serial Clock (SCL) and Serial Data (SDA) are required for the 2-wire serial bus communication interface and enable the host to access the QSFP28 memory map.
- The ResetL pin enables a complete module reset, returning module 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 the module indicates a completion of the reset interrupt. The module indicates this by posting an 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 module in order to protect 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 module, is normally pulled up to the host Vcc. When a module 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 a module is present by setting ModPrsL to a “Low” state.
- Interrupt (IntL) is an output pin. Low indicates a possible module 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 open collector output and must be pulled to the Host Vcc voltage on the Host board.
Pin Descriptions AQSFP28-100G-SR4
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 | GND | 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 | |
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 | ||
30 | Vcc1 | +3.3V Power Supply |
Notes:
- 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 receiver and transmitter power suppliers and shall be applied concurrently.Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the QSFP28 transceiver module in any combination. The connector pins are each rated for a maximum current of 1000mA.
Ordering information AQSFP28-100G-SR4
Model Number | Part Number | Voltage | Temperature |
AQSFP28-100G-SR4 | OPCW-S40-13-CR | 3.3V | 0°C to 70 °C |