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100G LR4

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100G Base QSFP28 LR4 Optical Transceiver Module

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7. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 7 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C Recommended Host Board S chematic

9. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 9 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C Mechanical Design Diagram Product shall be of design, construction and physical dimensions specified on applicable product drawing. Unit: mm

6. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 6 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C 29 Vcc TX +3.3V Transmitter Power Supply 30 Vcc1 +3.3V Power Supply 31 LPMode Low Power Mode Note 2 32 GND Ground 33 TX3p Transmitter Non - Inverted Data Input 34 TX3n Transmitter Inverted Data Input 35 GND Ground 36 TX1p Transmitter Non - Inverted Data Input 37 TX1n Transmitter Inverted Data Input 38 G ND Ground Note 1 Notes: 1. GND is the symbol for signal and supply (power) common for the module. All are common within the module and all module voltages are reference to this potential unless otherwise noted. Module circuit ground is isolated from module chassis ground within the module. 2. Open collector should be pulled up with 4.7~10K ohms on the host board to a voltage between 3.15V and 3.6V.

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 10 GENERAL PRODUCT CHARACTERISTICS Parameter Value Unit Comments Module Form Factor QSFP28 As defined by SFF - 661 Module Form Factor Number of Lanes 4 TX and 4 RX Maximum Aggregate Data Rate 103.125 Gb/s Maximum Data Rate per Lane 25.78125 Gb/s Protocols Supported InfiniBand, Ethernet Electrical Interface and Pin - out 38 - pin e dge connector Pin - out as defined by SFF - 8679 Maximum Power Consumption 4 Watts Varies with output voltage swing and pre - emphasis settings Management Interface Serial, I 2 C - based, 400 kHz maximum frequency As defined by SFF - 8636 Features: ◼ Hot Pluggable QSFP28 form factor ◼ LAN WDM DML Laser/PIN Photo Detector ◼ Supports 25.78125Gb/s per channel ◼ Maximum pow er consumption 4W ◼ Up to 10km transmission on SMF ◼ Operating Case Temperature: 0 °C ~70 °C ◼ Duplex LC receptacles ◼ SFF - 8636: Management Interface ◼ SFF - 8661: Pluggable Module ◼ SFF - 8679: General Electrical ◼ IEEE 802.3bm: Physical Layer Specifications and Management P arameters ◼ ROHS - 6: Environment Safety Applications: ◼ Ethernet for 100GBASE - LR4 ◼ InfiniBand EDR, FDR, & QDR

2. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 2 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C Abs o lute Maximum Ratings Exc eeding the limits below may damage the optical transceiver module permanently. Parameter Symb ol Min. Typ. Max. Unit. Ref. Maximum Supply Voltage V cc - 0.5 3.6 V Storage Temperature T sto - 40 85 °C Case Operating Temperature T op - 5 70 °C Relative Humidity RH 0 85 % Note Note : 1. Non - condensing. P arameters Parameter Symbol Min. Typ. Max. Unit. Ref. Supply Voltage V cc 3.14 3.46 V Power Consumption P Con 4 W Bit Rate BR 25.78125 Gb/s Note 1 Distance D 10 km Note 2 Number of Lanes 4 Management Interface Serial, I 2 C - based, maximum frequency 400 kHz Note 3 Logic Input Voltage High V ih 2 Vcc+0.3 V Logic Input Voltage Low V il - 0.3 0.8 V Note s : 1. Single lane 2. as defined by IEEE802.3bm 3. as defined by SFF - 86 36

10. Page 10 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - 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 - Q S28 - L R4 - C QSFP 28 25.78125 Gb p s each Channel 2x4ch 850nm VCSEL - 4 .3 ~ + 4 .5 each lane PIN - 8 . 6 dBm each Channel 0~70 °C 1 0 k m DDM RoHS 100GBASE - LR4 Ethernet Modification History Revision Date Description Originator Review Approved V 1 5 - Jul - 20 1 9 New Issue Ivy Che n Wayne Liao Wayne Liao All specification data are accurate on the date of publication for product comparisons and ordering information. WaveSp litter Technologies, Inc. rese rves the right to change 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 , Tai wan Tel: +886 - 2 - 2 698 - 7208 Fax: +886 - 2 - 2 698 - 7210 ShenZhen Branch 5F, 7th Building, Tian'an Industrial Zone, NanShan Area, ShenZhen China Tel: +86 - 755 - 86265980; Fax: +86 - 755 - 26642741

4. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 4 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C Optical Characteristics Parameter Symbol Min. Typ. Max. Unit. Ref. Transmitter Signaling Speed per Lane 25.78125 ± 100ppm Gb/s Lane wavelengths (Range) λ 1294.53 1295.56 1296.59 nm 1299.02 1300.05 1301.09 1303.54 1304.58 1305.63 1308.09 1309.14 1310.19 Side - mode suppression ratio SMSR 30 dB Average launch power, each lane P avg - 4.3 4.5 dBm Optical Modulation Amplitude OMA - 1.3 4.5 dBm Extinction ratio ER 4 dB Transmitter and dispersion penalty, each lane TDP - 2.3 dB Average launch power of OFF transmitter, each lane P off - 30 dBm Transmitter eye mask definition Compliant with IEEE 802.3bm Note 1 Receiver Signaling Spe ed per Lane 25.78125 ± 100ppm Gb/s Lane wavelengths (Range) λ 1294.53 1295.56 1296.59 n m 1299.02 1300.05 1301.09 1303.54 1304.58 1305.63 1308.09 1309.14 1310.19 Average receiver power, each lane - 10.6 4.5 dBm OMA Sensitivit y power, each lane - 8.6 Note 2 Receiver overload 4.5 dBm Notes: 1. Measured with a PRBS 2 31 - 1 test pattern for Hit ratio<5x10 - 5 2. Measured with conformance test signal for BER=1x10 - 12

5. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 5 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C P in D e scriptions PIN Symbol Descri ption Ref. 1 GND Ground 2 TX2n Transmitter Inverted Data Input 3 TX2p Transmitter Non - Inverted Data Input 4 GND Ground Note 1 5 TX4n Transmitter Inverted Data Input 6 TX4p Transmitter Non - Inverted Data Input 7 GND Ground Note 1 8 ModSelL Module Select Note 2 9 ResetL Module Reset Note 2 10 V cc RX +3.3V Receiver Power Supply Receiver 11 SCL 2 - wire Serial Interface Clock Note 2 12 SDA 2 - wire Serial Interface Data Note 2 13 GND Ground Note 1 14 RX3p Receiver Non - Inverted Data Output 15 RX3n Receiver Inverted Data Output 16 GND Ground Note 1 17 RX1p Receiver Non - Inverted Data Output 18 RX1n Receiver Inverted Data Output 19 GND Ground Note 1 20 GND Ground Note 1 21 RX2n Receiver Inverted Data Output 22 RX2p Receiver Non - Inverted Data Output 23 GND Ground Note 1 24 RX4n Receiver Inv erted Data Output 25 RX4p Receiver Non - Inverted Data Output 26 GND Ground Note 1 27 ModPrsL Module Present, internal pulled down to GND 28 IntL Interrupt output, should be pulled up on host board

8. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 8 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C Memory Map 2 - Wire Serial Address 1010000x Lower Page 00h 0 Identifier 1 - 2 Status 3 - 2 1 Interrupt Flags 22 - 23 Free Side Device Monitors 34 - 81 Channel Monitors 82 - 85 Reserved 86 - 98 Control 99 Reserved 1 0 0 - 1 0 4 Hardware Interrupt Pin Masks 1 0 5 - 1 0 6 Vendor Specific 107 Reserved 1 0 8 - 1 1 0 Free Side Device Properties 1 1 1 - 1 1 2 Assigned for use by PCI Express 113 Free Side Device Properties 1 1 4 - 1 1 8 Reserved 1 1 9 - 1 2 2 Password Change Entry Area ( Optional) 1 2 3 - 1 2 6 Password Entry Area (Optional) 127 Page Select Byte Optional Optional Optional Upper Page 00h Page 01h Page 02h Page 03h 128 Identifier 128 CC_APPS 128 - 255 User EEPROM data 128 - 175 Free Side Device T hresholds 129 - 191 Base ID Fields 129 AST Table Length (TL) 130 - 131 Application Code Entry 0 132 - 133 Application Code Entry 1 134 - 253 other entries 176 - 223 Channel Thresholds 192 - 223 Extended ID 224 - 255 Vendor Specific ID 224 TX EQ & RX Emphasis Mag nitude ID 225 RX output amplitude indicators 226 - 241 Channel Monitor Masks 254 - 255 Application Code Entry TL 252 - 255 Reserved

3. All contents are Copyright © 1996 - 20 1 9 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 3 of 10 Document Number: 95 - 0244 - V1.0 1 00G QSFP28 LR4 10km Transceiver WST - QS28 - L R4 - C E lectrical C haracteristics Parameter Symbol Min. Typ. Max. Unit. Ref. Transceiver Power Supply Current I cc 1200 mA Transceiver Power on Initialization Time T init 2000 ms Transmitter at TP1a Differential Data Input Voltage P eak to Peak Swing V in,pp 900 mV Common Mode Noise RMS 17.5 mV Differential Input Return Loss SDD22 Per OIF CEI - 28G - VSR and CAUI - 4 Requirements dB Common Mode to Differential Conversion and Differential to Common Mode Conversion SDD22 SCD22 dB Common Mode Return Loss SCC22 dB Transition Time, 20% to 80% T r , T f 10 ps Common Mode Voltage V cm - 0.3 2.8 V Eye Width @ 1E - 15 Probability EW15 0.46 UI Eye Height @ 1E - 15 Probability EH15 94 mv Receiver at TP4 Differential Data Ou tput Voltage Peak to Peak Swing V opp 300 900 mV Differential Output Impedance Z os 90 100 110 Ohms Common Mode Voltage V cm - 0.35 2.85 V Common Mode Noise RMS 17.5 mV Differential Output Return Loss SDD22 Per OIF CEI - 28G - VSR and CAUI - 4 Require ments dB Common Mode to Differential Conversion and Differential to Common Mode Conversion SDD22 SCD22 Common Mode Return Loss SCC22 - 2 dB Transition Time, 20% to 80% T r , T f 12 ps Eye Width @ 1E - 15 Probability EW15 0.57 UI Eye Height @ 1E - 15 Probability EH15 228 mV

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