100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 100Gb/s QSFP28 SR4 Optical Transceiver Module PQ21H-8501M 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 supply3.5W 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 Part Number Ordering Information PQ21H-8501M QSFP28 SR4 100m optical transceiver with full real-time digital diagnostic monitoring and pull tab 1 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 1.General Description 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. 2. Functional Description 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 2 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 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. 3. Transceiver Block Diagram Figure 1. Transceiver Block Diagram 4. Pin Assignment and Description Figure 2. MSA Compliant Connector 3 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Pin Definition PIN Logi Symbol Name/Description Note c 1 s GND Ground 2 CML-I Tx2n Transmitter Inverted Data Input 3 CML-I Tx2p Transmitter Non-Inverted Data output GND Ground 4 5 CML-I Tx4n Transmitter Inverted Data Input 6 CML-I Tx4p Transmitter Non-Inverted Data output GND Ground 7 8 LVTLL-I ModSelL Module Select 9 LVTLL-I ResetL Module Reset VccRx +3.3V Power Supply Receiver 10 11 LVCMOS-I/O SCL 2-Wire Serial Interface Clock 12 LVCMOS-I/O SDA 2-Wire Serial Interface Data GND Ground 13 14 CML-O Rx3p Receiver Non-Inverted Data Output 15 CML-O Rx3n Receiver Inverted Data Output GND Ground 16 1 1 1 2 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 GND Ground 1 1 23 24 CML-O Rx4n Receiver Inverted Data Output 25 CML-O Rx4p Receiver Non-Inverted Data Output GND Ground 26 27 LVTTL-O ModPrsL Module Present 28 LVTTL-O IntL Interrupt VccTx +3.3 V Power Supply transmitter 29 1 2 4 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 30 31 LVTTL-I 32 Vcc1 +3.3 V Power Supply LPMode Low Power Mode GND Ground 1 33 CML-I Tx3p Transmitter Non-Inverted Data Input 34 CML-I Tx3n Transmitter Inverted Data Output GND Ground 35 1 36 CML-I Tx1p Transmitter Non-Inverted Data Input 37 CML-I Tx1n Transmitter Inverted Data Output GND Ground 38 2 1 Notes: 1. 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 plane. 2. VccRx, Vcc1 and VccTx are the receiver and transmitter power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown in Figure 4 below. 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. 5. Optical Interface Lanes and Assignment Figure 3 shows the orientation of the multi-mode fiber facets of the optical connector. Table 1 provides the lane assignment. Fiber 12 Fiber 1 Figure 3 shows the orientation of the multi-mode fiber facets of the optical connector. Table 1 provides the lane assignment. Table 1: Lane Assignment Fiber # Lane Assignment 5 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 1 RX0 2 RX1 3 RX2 4 RX3 5,6,7,8 Not used 9 TX3 10 TX2 11 TX1 12 TX0 6.Recommended Power Supply Filter Figure 4. Recommended Power Supply Filter 7.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 Sym Min Max bol Unit Note s 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 % Damage Threshold, each Lane THd 3.4 dBm 6 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited 8. Recommended Operating Conditions and Power Supply Requirements Parameter Symbol Min Typical Max Units Not es Operating Case Temperature TOP 0 Power Supply Voltage VCC 3.13 3.3 70 degC 3.46 V 5 5 Data Rate, each Lane 25.781 Gb/s 25 Data Rate Accuracy -100 100 Pre-FEC Bit Error Ratio ppm 5x1 0-5 Post-FEC Bit Error Ratio 1x1 1 0 -12 Control Input Voltage High 2 Vcc V Control Input Voltage Low 0 0.8 V Link Distance (OM3 MMF) D1 70 m 2 Link Distance (OM4 MMF) D2 100 m 2 Notes: 1.FEC provided by host system. 2.FEC required on host system to support maximum distance. 9.Electrical Characteristics The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified. Paramete r Test Poin t Min Typic al Power Consumption Supply Current Max Icc Unit Notes s 2.5 W 757 mA Transmitter (each Lane) Overload Differential Voltage pk-pk Common Mode Voltage (Vcm) TP1a 900 TP1 -350 mV 2850 mV 1 7 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Differential Termination TP1 Resistance Mismatch 10 % At 1MHz See CEITP1 Differential Return Loss 28G-VS dB R (SDD11) Equatio n 13-19 Common Mode to Differential conversion and Differential to See CEITP1 28G-VS Common dB R Equatio n Mode conversion (SDC11, SCD11) 13-20 See CEI- Stressed Input Test TP1a 28G-VSR Section 13.3.11.2.1 Receiver (each Lane) Differential Voltage, pk-pk TP4 Common Mode Voltage (Vcm) TP4 Common Mode Noise, RMS Differential Termination 900 mV 2850 mV TP4 17.5 mV TP4 10 % -350 1 At 1MHz Resistance Mismatch See CEIDifferential Return Loss (SDD22) TP4 28G-VS dB R Equatio n 13-19 8 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Common Mode to Differential conversion and Differential to See CEITP4 28G-VR dB Equatio n Common Mode conversion 13-21 (SDC22, SCD22) Common Mode Return Loss (SCC22) Transition Time, 20 to 80% TP4 Vertical Eye Closure (VEC) TP4 Eye Width at 10-15 probability (EW15) Eye Height at 10-15 probability (EH15) -2 TP4 9.5 dB 2 ps 5.5 dB TP4 0.57 UI TP4 228 mV Notes: 1.Vcm is generated by the host. Specification includes effects of ground offset voltage. 2.From 250MHz to 30GHz. 10.Optical Characteristics Paramete Symbol Min Typical Max Units Note r s Transmitter Center Wavelength C RMS Spectral Width rms Average Launch Power, each Lane PAVG POMA Optical Modulation Amplitude (OMA), each Lane Launch Power in OMA minus TDEC, 840 860 nm 0.6 nm -8.4 2.4 dBm -6.4 3.0 dBm -7.3 each Lane Transmitter and Dispersion Eye ER 2.0 1 dBm 4.3 Closure (TDEC), each Lane Extinction Ratio 850 dB dB 9 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Optical Return Loss Tolerance Average Launch Power OFF Transmitter, each Lane TOL 12 dB Poff -30 dBm Encircled Flux 86% at 19 m 30% at 4.5 m Transmitter Eye Mask Definition {0.3, 0.38, 0.45, 0.35, 0.41, {X1, X2, X3, Y1, Y2, Y3} 2 0.5} Receiver C Center Wavelength Damage Threshold, each Lane THd Average Receive Power, each Lane 840 850 3.4 Lane Stressed Receiver -10.3 SEN Sensitivity (OMA), each Lane RR Receiver Reflectance LOS Assert LOSA LOS Deassert LOSD LOS Hysteresis LOSH nm dBm Receive Power (OMA), each Lane Receiver Sensitivity (OMA), each 860 2.4 dBm 3.0 dBm -9.2 dBm -5.2 dBm -12 dB -30 3 for BER = 5x10-5 4 dBm -12 0.5 dBm dB Conditions of Stress Receiver Sensitivity Test (Note 5) Stressed Eye Closure (SEC), Lane under Test Stressed Eye J2 Jitter, Lane under 4.3 dB 0.39 UI Test Stressed Eye J4 Jitter, Lane under 0.53 UI Test 10 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited OMA of each Aggressor Lane Stressed Receiver Eye 3 Mask Definition {X1, X2, X3, Y1, Y2, Y3}, dBm {0.28, 0.5, 0.5, 0.33, 0.33, 0.4} Hit ratio 5x10-5 hits per sample Notes: 1.Even if the TDP < 0.9 dB, the OMA min must exceed the minimum value specified here. 2.Hit ratio 1.5x10-3 hits per sample. 3.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 power. 4.Measured with conformance test signal at receiver input for BER = 5x10-5. 5.Vertical eye closure penalty, stressed eye J2 jitter, stressed eye J4 jitter, and stressed receiver eye mask definition are test conditions for measuring stressed receiver sensitivity. They are not characteristics of the receiver. 11.Digital Diagnostic Functions The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF-8436. Parameter Temperature monitor absolute Symbol Min Max Units DMI_Temp -3 3 degC error Over operating temperature range Supply voltage monitor absolute DMI _VCC -0.15 0.15 V error Channel Notes Over full operating range RX power monitor absolute error Channel Bias current monitor Channel TX monitor absolute error power DMI_RX_Ch -2 2 dB 1 DMI_Ibias_Ch -10% 10% mA Ch1~Ch 4 DMI_TX_Ch -2 2 dB 1 Notes: 1.Due to measurement accuracy of different single mode fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy. 12.Mechanical Dimensions 11 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Figure 5. Mechanical Outline This transceiver is specified as ESD threshold 1KV for high speed data pins and 2KV for all others electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment. 13.ESD This transceiver is specified as ESD threshold 1kV for high speed data pins and 2kV for all others electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment. 14.Laser Safety This is a Class 1 Laser Product according to EN 60825-1:2014. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007). Caution: Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 12 100G QSFP28 Series P/N:PQ21H-8501M Primus IT Limited Contact Information Primus IT Limited 1HongKongRM M4/F Continental Mansion 300 King's RD HK 2Tel:+86 0755-25924025 3Fax:+86 0755-25924051 4Websitehttp://www.primus-it.com 5Emailsales@primus-it.com 13