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100G ER4 Lite

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100G BaseQSFP28 ER4 Lite Optical Transceiver

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8. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 8 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C directly to the host board signal common ground plane. 2. VccRx, Vcc1 and VccTx are the receiving and transmission power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown in Figure 3 below. Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the module in any combination. The connector pins are each rated for a maximum current of 1000mA. Recommended Transceiver Block Diagram Fi gure 2 . Transceiver Block Diagram

10. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 10 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Mechanical Design Diagram Figure 4 . Mechanical Outline Unit: m m ESD This transceiver is specified as ESD threshold 1kV for SFI pins and 2kV for all other electrical input pins, tested per MIL - STD - 883, Method 3015.4 /JESD 22 - 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. 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 perfo rmance of procedures other than those specified herein may result in hazardous radiation exposure.

1. Data Sheet All contents are Copyright © 1996 - 20 19 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 1 of 11 General Description This product is a 100Gb/s transceiver module designed for optical communication applications compliant to 100GBASE - ER4 Lite standard. The module converts 4 input channels of 25Gb/s electrical data to 4 channels of LAN WDM opt ical signals and then multiplexes th em into a single channel for 100Gb/s optical transmission. Reversely on the receiver side, the module de - multiplexes a 100Gb/s optical input into 4 channels of LAN WDM optical signals and then converts them to 4 output c hannels of electrical data. The cen tral wavelengths of the 4 LAN WDM channels are 1295.56, 1300.05, 1304.58 and 1309.14 nm as members of the LAN WDM wavelength grid defined in IEEE 802.3ba. The high performance cooled LAN WDM EA - DFB transmitters and high s ensitivity receivers provide superi or performance for 100Gigabit Ethernet applications up to 40km links with FEC. The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP+ Multi - Source A greement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. Features: ◼ Hot pluggable QSFP28 MSA form factor ◼ Compliant to IEEE 802.3ba 100GBASE - ER4 Lite ◼ Up to 40km reach for G.652 SMF with FEC ◼ Single +3.3V power supply ◼ Operating case temperature: 0~70 º C Transmitter: cooled 4x25Gb/s LAN WDM TOSA (1295 .56, 1300.05, 1304.58, 1309.14nm) with hermetic packages ◼ Receiver: 4x25Gb/s ROSA with hermetic packages ◼ 4x28G Electrical Serial Interface (CEI - 28G - VSR) ◼ Maximum power consumption 4.5W ◼ Duplex LC receptacle ◼ RoHS - 6 compliant Applic ations: ◼ 100GBASE - ER4 Ethern et Links ◼ InfiniBand QDR and DDR interconnects ◼ Client - side 100G Telecom connections

9. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 9 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Recommended Power Supply Filter Figure 3 . Rec ommended Power Supply Filter D igital Diagnostic Functions The following digital diagnostic characteristics are defined over the normal operating conditions unless otherwise specified. Parameter Symbol Min Max Units Notes Temperature monitor absolute error DMI_Temp - 3 +3 °C Over operating temperature range Supply voltage monitor absolute error DMI _VCC - 0.1 0.1 V Over full operating range Channel RX power monitor absolute error DMI_RX_Ch - 2 2 dB 1 Channel Bias current monitor DMI_Ibias_Ch - 10% 10% mA Channel TX power monitor absolute error 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.

2. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 2 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Functional Description The tran sceiver module receives 4 channels of 25Gb/s electrical data, which are processed b y a 4 - channel Clock and Data Recovery (CDR) IC that reshapes and reduces the jitter of each electrical signal. Subsequently, each of 4 laser driver IC's converts one of the 4 channels of electrical signals to an optical signal that is transmitted from one of the 4 cooled DML lasers which are packaged in the Transmitter Optical Sub - Assembly (TOSA). Each laser launches the optical signal in specific wavelength specified in IEE E802.3ba 100GBASE - ER4 requirements. These 4 - lane optical signals will be optically multiplexed into a single fiber by a 4 - to - 1 optical WDM MUX. The optical output power of each channel is maintained constant by an automatic power control (APC) circuit. Th e transmitter output can be turned off by TX_DIS hardware signal and/or 2 - wire seri al interface. The receiver receives 4 - lane LAN WDM optical signals. The optical signals are de - multiplexed by a 1 - to - 4 optical DEMUX and each of the resulting 4 channels of optical signals is fed into one of the 4 receivers that are packaged into the Recei ver Optical Sub - Assembly (ROSA). Each receiver converts the optical signal to an electrical signal. The regenerated electrical signals are retimed and de - jittered and ampli fied by the RX portion of the 4 - channel CDR. The retimed 4 - lane output electrical si gnals are compliant with CEI - 28G - VSR interface requirements. In addition, each received optical signal is monitored by the DOM section. The monitored value is reported thro ugh the 2 - wire serial interface. If one or more received optical signal is weaker th an the threshold level, RX_LOS hardware alarm will be triggered. A single +3.3V power supply is required to power up this product. Both power supply pins VccTx and VccRx a re 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, this product responds to 2 - wire serial co mmunication 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 and enable th e host to access the QSFP28 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 he ld for longer than the minimum pulse length. During the execution of a reset the host s hall disregard all status bits until it indicates a completion of the reset interrupt. The product indicates this by posting an IntL (Interrupt) signal with the Data_No t_Ready bit negated in the memory map. Note that on power up (including hot insertion) t he 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 pr oduct in order to protect hosts that are not capable of cooling higher power modules, sho uld such modules be accidentally inserted.

6. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 6 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C power. 2. 25.78 125 Gb/s , NRZ, PRBS 2 31 - 1, BER =5x10 - 5 . 3. 2 7.95249 Gb/s , NRZ, PRBS 2 31 - 1, BER =5x10 - 5 . Pin Assignment Figure 1 . MSA Compliant Connector PIN Logic Symbol Name/Description Notes 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 ModSelL 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

3. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 3 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Module Present (ModPrsL) is a signal local to the host board which, in the absence of a product, is normally pulled up to t he host Vcc. When the product is inserted into the connector, it completes the path to gr ound 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 outpu t pin. “ Low ” indicates a possible operational fault or a status critical to the host syste m. 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 volt age on the Host board. Abs o lute Maximum Ratings It must be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module. Parameter Symbol Min Max Units Note Storage Temperature TS - 40 85 ºC Operating Case Temperature TOP 0 70 ºC Power Supply Voltage VCC - 0.5 3.6 V Relative Humidity (non - condensation) RH 0 85 % Damage Threshold, each Lane THd - 3.0 dBm Re co mmended O perating Co nditi o ns and Power Supply Requirements Parameter Symbol Min Typical Max Units Operating Case Temperature TOP 0 70 degC Power Supply Voltage VCC 3.135 3.3 3.465 V Data Rate, each Lane 25.78125 Gb/s Control Input Voltage High 2 Vcc V Control Input Voltage Low 0 0.8 V Link Distance with G.652 D 40 km

11. Page 11 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Ordering Information Part No Specification Package Data rate per Lane Laser Optical Power Detector Max. Receive Sensitivity (OMA) Temp Reach Other Application code WST - QS28 - ER4L - C QS FP28 25.78 Gb p s eac h Channel D ML - 2.5 ~ + 4.5 each Channel PIN - 16.5 dBm each Channel 0~ 70 °C 30km (without FEC) DDM RoHS 100GBASE - ER4 Ethernet WST - QS28 - ER4 - C QS FP28 25.78 Gb p s eac h Channel LAN WDM EA - DFB - 2.5 ~ + 4.5 each Channel PIN - 16.5 dBm each Channel 0~ 70 °C 40km (with FEC) DDM RoHS 100GBASE - ER4 Ethernet Modification History Revision Date Description Originator Review Approved V 1 .0 2 9 - Ju l - 20 1 9 New Issue Ivy Chen Wayne Liao Wayne Liao All specification data are accurate on the date of publication for product comparisons and ordering information. WaveSp litter Technologies, Inc. reserves the right to chan ge specifications without notice. U.S. Branch 2080 Rancho Higuera Ct. Fremont, CA 9 45 3 9, USA Tel: 510 - 651 - 7800 Fax: 510 - 651 - 7822 Taipei Headquarters 16F - 5, No. 75, Sec. 1, Xintai 5th Rd., Xizhi Dist. , New Taipei C ity 221 01 , Taiwan Tel: +886 - 2 - 2 698 - 7208 Fax: +886 - 2 - 2 698 - 7210 ShenZhen Branch 610#, 6F, No.204 Building, 2nd Industrial zone Nanyou, Nanshan district, Shenzhen, Guangdong China 518054 Tel: +86 - 755 - 86265980 Fax: +86 - 755 - 26642741

4. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 4 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C E lectrical C haracteristics The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified. Parameter Symbol Min Typical Max Units Notes Power Consumption 4.5 W Supply Current Icc 1.36 A Transceiver Power - on Initialization Time 2000 ms Transmitter (each Lane) Overload Differential Voltage pk - pk TP1a 900 mV Common Mode Voltage (Vcm) TP1 - 350 2850 mV 2 Differential Termination Resistance Mismatch TP1 10 % At 1MHz Differential Return Loss (SDD11) TP1 See CEI - 28G - VSR equation 13 - 19 dB Common Mode to D ifferential 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 Section13. 3.11.2.1 R eceiver (each Lane) Differential Voltage, pk - pk TP4 900 mV C ommon Mode Voltage (Vcm) TP4 - 350 2850 mV 2 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 c onversion 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 3 Transition Time, 20 to 80% TP4 9.5 ps

5. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 5 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C Vertical Eye Closure (VEC) TP4 5.5 dB Eye Width at 1 0 - 15 probability (EW15) TP4 0.57 UI Eye Height at 10 - 15 probability (EH15) TP4 228 mV Notes: 1. Power - on Initialization Time is the time from when the power supply voltages reach and remain above the minimum recommended operating supply voltages to the time when the module is fully functional. 2. Vcm is generated by the host. Specification includes effects of ground offset vol tage. 3. From 250MHz to 30GHz. Optical Characteristics Parameter Symbol Min Typical Max Unit Notes Lane Wavelength L0 1294.53 12 95.56 1296.59 nm L1 1299.02 1300.05 1301.09 nm L2 1303.54 1304.58 1305.63 nm L3 1308.09 1309.14 1310.19 nm Transmitter SMSR SMSR 30 dB Total Average Launch Power P T 10.5 dBm Average Launch Power, each Lane P AVG - 2.5 4.5 dBm Extinctio n Ratio ER 4 dB RIN 20 OMA RIN - 130 dB/Hz Eye Mask {X1, X2, X3, Y1, Y2, Y3} {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} Receiver Damage Threshold, each Lane TH d - 3.0 dBm 1 Total Average Receive Power 2.0 dBm Receiver Sensitivity (OMA), each Lane SEN _25G - 16.5 dBm (OMA) 2 SEN _28G - 20.5 - 19 dBm (Ave) 3 LOS Assert LOSA - 26 dBm LOS Deassert LOSD - 24 dBm LOS Hysteresis LOSH 0.5 dB Notes: 1. The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optic al input signal having this power level on one lane. The receiver does not have to operate correctly at this input

7. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technolo gies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 7 of 11 Document Number: 95 - 0261 - V1.0 100G QSFP28 ER4 Lite Optical Transceiver WST - QS28 - ER4 x - C 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 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 +3.3 V Power Supply transmitter 2 30 Vcc1 +3.3 V 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 Notes: 1. GND is the symbol for signal and supply (power) common for the QSFP28 module. All are common within the module and all module voltages are referenced to this potential unless otherwise noted. Connect these

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