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25G ER 30KM

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25G Base SFP28 1310 nm 30 km Transceiver

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5. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 5 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x Recommended Circuit Schematic Package Diagram Unit: mm Note: Specifications subject to change without notice.

7. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 7 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x OWRAP enable MODE (I 2 C Controlled) Ewrap forward enable MODE (I 2 C Controlled) Ewrap enable MODE (I 2 C Controlled) SFP+ Co nnector SFP+ Connector SFP+ C onnector

6. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 6 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x WRAP and BYPASS CDR operation functions - Soft Control (Address A2h, Byte 111). To assist with local host or remote diagnostic and optimization sequences, electrical and optical wrap functions can be enabled. Optical wrap (OWRAP) takes the received optical signal through CDRs and retransmits it optically out. Electrical wrap (EWRAP) takes the received electrical signal through CDRs and retransmits it electrically out. Optional forward functions can be transmitted outbound the wrapped information via I 2 c control. Byte Bit Name Description 4 - 7 Reserved Reserved. 3 OWRAP Forward Enable Bit When set in combination with OWRAP Enable, OWRAP Forward routes incoming SFP+ Rx optical data to both the Tx optical output and the Rx electrical output. Enabling sets bit 2 and clears all other bits in byte 111. 2 OWRAP Enable Bit When set, OWRAP routes incoming SFP+ Rx optical data to the Tx optical output. Enabling clears all other bits in byte 111. 1 EWRAP Forward Enable Bit When set in combination with EWRAP Enable, EWRAP Forward routes incoming SFP+ Tx electrical data to both Rx electrical output and Tx optical output. Enabling s et s bit 0 and clears all other bits in byte 111. 0 EWRAP Enable Bit When set, EWRAP Enable routes incoming SFP+ Tx electrical data to the Rx electrical output. Enabling clears all other bits in byte 111. OWRAP FORWARD enable MODE (I 2 C Controlled) SFP+ Connector

1. Data Sheet All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 1 of 10 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver (RoHS Compliant) P/N: WST-S28-ERL-x Description WST-S28-ERL-x series single mode transceiver is a small form factor pluggable module for bi-directional serial optical data communications such as 25G Ethernet and CPRI Option 10. It is with the SFP+ 20-pin connector to allow hot plug capability. Digital diagnostic functions are available via an I 2 C. This module is designed for single mode fiber and operates at a nominal wavelength of 1310 nm. The transmitter section uses a 1310 nm multiple quantum well DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section uses an integrated InGaAs detector preamplifier (IDP) mounted in an optical header and a rate selection clock data recovery (CDR) IC. Features:  Up to 25.78 Gbps Bi-directional Data Links  Complaint with SFF-8402 SFP28 MSA  Support 25GBASE-ER Lite  Support CPRI Option 10 @ 24.33Gbps  Built-in dual CDR  Distance up to 30 km (Non-FEC) / 40km  1310nm DFB Transmitter  SFF-8472 Digital Diagnostic Function  AC/AC Coupling according to MSA  Single +3.3 V Power Supply  RoHS 6/6 Compliant  0 to 70 o C Operation: WST-S28-ERL-C -10 to 85 o C Operation: WST-S28-ERL-E -40 to 85 o C Operation: WST-S28-ERL-I  Class 1 Laser International Safety Standard IEC-60825 Compliant  Enhanced EWRAP and OWRAP operational features Applications:  25G Ethernet  CPRI Option 10

3. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 3 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x Receiver Optical Specifications (0 o C < Topr < 70 o C , 3.13V < Vcc < 3.47V) Parameter Symbol Min Typ Max Units Notes Sensitivity, Average Sen -13.4 dBm 2 Receiver Overload P MAX +2 --- dBm LOS – Deasserted LOS D --- --- -14 dBm Transition: low to high LOS – Asserted LOS A -24 --- --- dBm Transition: high to low Wavelength of Operation  c 1260 1355 nm Optical Return Loss ORL -27 dB Notes: 1. Measured with worst ER; BER < 10 -6 and PRBS 2 31 -1. Electrical Characteristics Parameter Symbol Min Typ Max Units Notes High-Speed Signal (CML) Interface Specification Input Data Rate 24.33/25.78 Gb/s TX Clock Tolerance -100 +100 ppm 3 Differential Input Impedance Rin 100 Ω Differential Data Input Amplitude 150 1000 mVpp Internally AC coupled Output Data Rate 8.5 25.78 Gb/s RX Clock Tolerance -100 +100 ppm 3 Differential Output Impedance Rout 100 Ω Differential Data Output Amplitude 350 600 700 mVpp Internally AC coupled Low-Speed Signal (LVTTL) Interface Specification Input High Voltage 2.0 Vcc+0.3 V Input Low Voltage GND 0.8 V Output High Voltage 2.4 Vcc V Output Low Voltage GND 0.5 V Notes: 1. Clock tolerance for 24.33Gb/s and 25.78Gb/s.

10. Page 10 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x Ordering Information P/No. Specification Bit Rate (Gb/s) 25GBASE CPRI Distance (km) Wavelength (nm) Package Case Temp ( o C ) RoHS Compliant WST-S28-ER-C Up to 25.78 ER Lite Option 10 30* 1310 DFB SFP28 with DMI 0 to 70 Yes WST-S28-ER-E Up to 25.78 ER Lite Option 10 30* 1310 DFB SFP28 with DMI -10 to 85 Yes WST-S28-ER-I Up to 25.78 ER Lite Option 10 30* 1310 DFB SFP28 with DMI -40 to 85 Yes Note: *Non-FEC Modification History Revision Date Description Originator Review Approved V1.0 26-Nov-2018 New Issue Ivy Chen Wayne Liao Wayne Liao V1.1 11-Jan-2019 Update picture Ivy Chen Wayne Liao Wayne Liao All specification data are accurate on the date of publication for product comparisons and ordering information. WaveSplitter Technologies, Inc. reserves the right to change specifications without notice. U.S. Branch 2080 Rancho Higuera Ct. Fremont, CA 94539, USA Tel: 510-651-7800 Fax: 510-651-7822 Taipei Headquarters 16F-5, No. 75, Sec. 1, Xintai 5th Rd., Xizhi Dist., New Taipei City 22101, Taiwan Tel: +886-2-2698-7208 Fax: +886-2-2698-7210 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

2. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 2 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x LASER SAFETY This single mode transceiver is a Class 1 laser product. It complies with IEC-60825 and FDA 21 CFR 1040.10 and 1040.11. The transceiver must be operated within the specified temperature and voltage limits. The optical ports of the module shall be terminated with an optical connector or with a dust plug. Absolute Maximum Ratings Parameter Symbol Min Max Units Notes Storage Temperature Tstg -40 85 o C Relative Humidity RH 5 85 % Non-condensing Operating Case Temperature Topr 0 -10 -40 70 85 85 o C WST-S28-ERL-C WST-S28-ERL-E WST-S28-ERL-I Power Supply Voltage Vcc -0.5 3.6 V Receiver Input Optical Power Mip 3 dBm Average power Recommended Operating Conditions Parameter Symbol Min Typ Max Units / Notes Power Supply Voltage Vcc 3.135 3.3 3.465 V Operating Case Temperature Topr 0 -10 -40 70 85 85 o C / WST-S28-ERL-C o C / WST-S28-ERL-E o C / WST-S28-ERL-I Relative Humidity RH 5 85 % / Non-condensing Power Supply Current I CC (TX+RX) 270 340 mA Data Rate 24.33 / 25.78 Gb/s Transmitter Optical Specifications (0 o C < Topr < 70 o C , 3.13V < Vcc < 3.47V) Electrical Parameter Symbol Min Typ Max Units Notes Average Launch Power Po, AVG 4 8 dBm 1 Output Center Wavelength  c 1295 1310 1325 nm Output Spectrum Width  --- 1 nm -20 dB width Side Mode Suppression Ratio SMSR 30 dB Extinction Ratio ER 3.5 dB Transmitter and Dispersion Penalty TDP 2.7 dB Relative Intensity Noise RIN -130 dB/Hz Average Launch Power of OFF Transmitter -30 dBm Notes: 1. Output power is power coupled into a 9/125  m single-mode fiber.

4. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 4 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x Connection Diagram PIN Signal Name Description PIN Signal N ame Description 1 V EE T Transmitter Signal Ground 11 V EE R Receiver Signal Ground 2 TX_Fault Transmitter Fault Indication. Logic “1” Output = Laser Fault. Logic “0” Output = Normal Operation 12 RD- Inverse Receiver Data Out 3 TX_Disable Logic “1” Input (or no connection) = Laser off, Logic “0” = Laser on. 13 RD+ Receiver Data Out 4 SDA Modulation Definition 2 – Two wires serial ID Interface 14 V EE R Receiver Signal Ground 5 SCL Modulation Definition 1 – Two wires serial ID Interface 15 V CC R Receiver Power – 3.3V±5% 6 MOD-ABS Modulation Definition 0 – Ground in Module 16 V CC T Transmitter Power – 3.3V±5% 7 RS0 RX Rate Select: This pin has an internal 30k pulldown to ground. A signal on this pin will not affect module performance. 17 V EE T Transmitter Signal Ground 8 RX_LOS Loss of Signal Out (OC). 18 TD+ Transmitter Data In 9 RS1 TX Rate Select: This pin has an internal 30k pulldown to ground. A signal on this pin will not affect module performance. 19 TD- Inverse Transmitter Data In 10 V EE R Receiver Signal Ground 20 V EE T Transmitter Signal Ground Module Definition Module Definition PIN 4 PIN 5 PIN 6 Interpretation by Host 4 SDA SCL MOD-ABS Serial module definition proto c ol Module Definition 4 specifies a serial definition protocol. For this definition, upon power up, SDA and SCL appear as no connector (NC) and MOD-ABS is TTL LOW. When the host system detects this condition, it activates the serial protocol. The protocol uses the 2-wire serial CMOS E 2 PROM protocol of the ATMEL AT24C01A/02/04 family of components.

9. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 9 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x EEPROM Series ID Memory Contents (Address A2h) Addr. Hex Note Addr. Hex Note Addr. Hex Note Addr. Hex Note 0 4B Temp. High Alarm (75 o C) 32 4D Rx Power High Alarm (3dBm) 64 00 For External Cal. 96 Real Time Temp. MSB 1 00 33 F1 65 00 For External Cal. 97 Real Time Temp. LSB 2 FB Temp. Low Alarm (-5 o C) 34 01 Rx Power Low Alarm (-15.4dBm) 66 00 For External Cal. 98 Real Time Vcc MSB 3 00 35 20 67 00 For External Cal. 99 Real Time Vcc LSB 4 49 Temp. High Warming (73 o C) 36 3D Rx Power High Warming (2dBm) 68 3F For External Cal. 100 Real Time Tx Bias MSB 5 00 37 E9 69 80 For External Cal. 101 Real Time Tx Bias LSB 6 00 Temp. Low Warming (0 o C) 38 01 Rx Power Low Warming(-13.4dB m) 70 00 For External Cal. 102 Real Time Tx Pwr MSB 7 00 39 C9 71 00 For External Cal. 103 Real Time Tx Pwr LSB 8 8C Voltage High Alarm (3.6V) 40 00 Reserved 72 00 For External Cal. 104 Real Time Rx Pwr MSB 9 A0 41 00 Reserved 73 00 For External Cal. 105 Real Time Rx Pwr LSB 10 75 Voltage Low Alarm (3.0V) 42 00 Reserved 74 00 For External Cal. 106 Reserved 11 30 43 00 Reserved 75 00 For External Cal. 107 Reserved 12 88 Voltage High Warming (3.5V) 44 00 Reserved 76 01 For External Cal. 108 Reserved 13 B8 45 00 Reserved 77 00 For External Cal. 109 Reserved 14 79 Voltage Low Warming (3.1V) 46 00 Reserved 78 00 For External Cal. 110 Tx Dis, Tx Fault, Rx Los 15 18 47 00 Reserved 79 00 For External Cal. 111 OWRAP, EWRAP 16 AF Tx Bias High Alarm (90mA) 48 00 Reserved 80 01 For External Cal. 112 Alarm Flag 17 C8 49 00 Reserved 81 00 For External Cal. 113 Alarm Flag/Reserved 18 03 Tx Bias Low Alarm (2mA) 50 00 Reserved 82 00 For External Cal. 114 Reserved 19 E8 51 00 Reserved 83 00 For External Cal. 115 Reserved 20 9C Tx Bias High Warming (80mA) 52 00 Reserved 84 01 For External Cal. 116 Warming Flag 21 40 53 00 Reserved 85 00 For External Cal. 117 Warming Flag/Reserved 22 07 Tx Bias Low Warming (4mA) 54 00 Reserved 86 00 For External Cal. 118 RS1 Select 23 D0 55 00 Reserved 87 00 For External Cal. 119 Reserved 24 FF Tx Power High Alarm (8.16dBm) 56 00 For External Cal. 88 01 For External Cal. 120 Vendor Specific 25 FE 57 00 For External Cal. 89 00 For External Cal. 121 26 4D Tx Power Low Alarm (3dBm) 58 00 For External Cal. 90 00 For External Cal. 122 27 F1 59 00 For External Cal. 91 00 For External Cal. 123 28 F6 Tx Power High Warming (8dBm) 60 00 For External Cal. 92 00 For External Cal. 124 29 78 61 00 For External Cal. 93 00 For External Cal. 125 30 62 Tx Power Low Warming (4dBm) 62 00 For External Cal. 94 00 For External Cal. 126 31 1F 63 00 For External Cal. 95 Check Sum 127 Note: Address 128 – 247: customer R/W EEPROM. Address 248 – 255: Vendor Specific.

8. All contents are Copyright © 1996 - 2019 Wavesplitter Technologies, Inc. All rights reserved. Preliminary and Proprietary www.wavesplitter.com Page 8 of 10 Document Number: 95-0209-V1.1 25GE 30 km 1310 nm Digital Diagnostic SFP28 LC Single-Mode Transceiver WST-S28-ERL-x EEPROM Series ID Memory Contents (Address A0h) Addr. Hex ASCII Note Addr. Hex ASCII Note Addr. Hex ASCII Note Addr. Hex ASCII Note 0 03 SFP+ 32 20 64 18 Power Level 1, w/ CDR, Uncooled Tx, Txdis, Txfault, LOS 96 00 Vendor specific EEPROM 1 04 33 20 65 1A 97 00 2 07 LC 34 20 66 68 25.78Gbps 98 00 3 00 35 20 67 00 99 00 4 00 36 00 NA 68 Serial number: each piece with different serial number 100 00 5 00 37 00 Vendor IEEE OUI 69 101 00 6 00 38 0F 70 102 00 7 00 39 0E 71 103 00 8 00 40 57 W Part Number 72 104 00 9 00 41 53 S 73 105 00 10 00 42 54 T 74 106 00 11 06 64B/66B 43 2D - 75 107 00 12 FF > 25Gbps 44 53 S 76 108 00 13 00 45 32 2 77 109 00 14 1E 30km 46 38 8 78 110 00 15 FF > 25.4km 47 2B + 79 111 00 16 00 48 45 E 80 112 00 17 00 49 52 R 81 113 00 18 00 50 4C L 82 114 00 19 00 51 2D - 83 115 00 20 57 W Vendor name 52 43 C 84 Y Date Code 116 00 21 41 A 53 20 85 Y 117 00 22 56 V 54 20 86 M 118 00 23 45 E 55 20 87 M 119 00 24 53 S 56 30 0 Revision, depended on version 88 D 120 00 25 50 P 57 31 1 89 D 121 00 26 4C L 58 20 90 20 122 00 27 49 I 59 20 91 20 123 00 28 54 T 60 05 1310 nm 92 68 Monitoring 124 00 29 54 T 61 1E 93 F0 Soft Control and Monitoring 125 00 30 45 E 62 00 Reserved 94 08 SFF-8472 V12.0 126 00 31 52 R 63 Checksum 0-62 95 Checksum 64-94 127 00

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