Product Specification 25G SFPwire(R) SFP+ Active Optical Cable FCCG125SD1Cxx PRODUCT FEATURES Hot-pluggable SFP+ cable ends Supports 25.7813 Gb/s bit rate Connectivity Diagnostics(R) SFI limiting interface Input equalization and output emphasis controls Single 3.3V power supply Low power dissipation 0C to 70C Temperature range Rigid pull-tab with LED light APPLICATIONS 25G Ethernet for Intra- and Inter-Rack data center interconnection Finisar 25G SFPwire(R), FCCG125SD1Cxx, are SFP+ Active Optical Cables designed for use in 25G Ethernet links. Finisar 25G SFPwire(R) are equipped with Connectivity Diagnostics(R), a Finisar's technology solution enabling real-time performance monitoring and troubleshooting. The electrical interface of Finisar 25G SFPwire(R) is compliant with SFF-8431[1], and the receiver side is limiting. Finisar 25G SFPwire(R) provides non-adaptive input equalization and output emphasis controls as per SFF-8472[2]. The mechanical specifications of the 25G SFPwire(R) SFP+ ends are compatible with SFF-8432[3]. The 25G SFPwire(R) is RoHS compliant per Directive 2011/65/EU[4,5]. PRODUCT SELECTION FCCG125SD1Cxx Cable Length Options (Orange Jacket Cables) xx = Z5 0.5m xx = 05 5m xx = 01 1.0m xx = 07 7m xx = A5 1.5m xx = 09 9m xx = 02 2.0m xx = 10 10m xx = B5 2.5m xx = 15 15m xx = 03 3.0m xx = 20 20m xx = C5 3.5m xx = 30 30m Please contact Finisar for Aqua-color jacket or custom length options. Finisar Corporation - November 2018 Rev. B2 Page 1 FCCG125SD1Cxx Product Specification I. Pin Descriptions Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol VEET TFAULT TDIS SDA SCL MOD_ABS RS0 RX_LOS RS1 VEER VEER RDRD+ VEER VCCR VCCT VEET TD+ TDVEET Name/Description Transmitter Ground (Common with Receiver Ground) Transmitter Fault. Transmitter Disable. Laser output disabled on high or open. 2-wire Serial Interface Data Line 2-wire Serial Interface Clock Line Module Absent. Grounded within the module No connection required Loss of Signal indication. Logic 0 indicates normal operation. No connection required Receiver Ground (Common with Transmitter Ground) Receiver Ground (Common with Transmitter Ground) Receiver Inverted DATA out. AC Coupled Receiver Non-inverted DATA out. AC Coupled Receiver Ground (Common with Transmitter Ground) Receiver Power Supply Transmitter Power Supply Transmitter Ground (Common with Receiver Ground) Transmitter Non-Inverted DATA in. AC Coupled. Transmitter Inverted DATA in. AC Coupled. Transmitter Ground (Common with Receiver Ground) Ref. 1 2,3 4 2 2 5 6 1 1 1 7 7 1 1 Notes: 1. Circuit ground is internally isolated from chassis ground. 2. Open collector/drain output, which should be pulled up with a 4.7k - 10k Ohms resistor on the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V. 3. A high output indicates a transmitter fault caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output indicates normal operation. In the low state, the output is pulled to <0.8V. 4. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V. 5. Internally pulled down per SFF-8431 Rev 4.1. 6. LOS is open collector output. Should be pulled up with 4.7k - 10k on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. 7. Internally connected. Towards Bezel 1 VeeT 2 TX_Fault 3 TX_Disable 4 SDA 5 SCL 6 MOD_ABS 7 RS0 8 RX_LOS 9 10 VeeT 20 TD- 19 TD+ 18 VeeT 17 VccT 16 VccR 15 VeeR 14 RD+ 13 RD- 12 VeeR 11 Towards ASIC RS1 VeeR Figure 1. Diagram of Host Board Connector Block Pin Numbers and Names. Finisar Corporation - November 2018 Rev. B2 Page 2 FCCG125SD1Cxx Product Specification II. Absolute Maximum Ratings Exceeding the limits below may damage the active optical cable permanently. Parameter Symbol Min Typ Max Unit Ref. Maximum Supply Voltage Vcc -0.5 4.0 V Storage Temperature TS -5 75 1 C Case Operating Temperature TA 0 70 C Relative Humidity RH 0 85 % 2 Notes: 1. Assumes no mechanical load force on the unit. Ensuring no mechanical load force requires a cable bend radius of >105 mm within 100 mm of either cable and SFP+ end and >60 mm on the rest of the cable. Cable is rated for the storage temperature range is -20 to 75C. Non-condensing. III. Electrical Characteristics (each cable end, TOP = 0 to 70 C, VCC = 3.14 to 3.46 Volts) Parameter Symbol Min Typ Max Unit Supply Voltage Vcc 3.14 3.46 V Supply Current Icc 310 mA Transmitter Input differential impedance Rin 100 Differential data input swing Vin,pp 180 700 mV Transmit Disable Voltage VD 2 Vcc V Transmit Enable Voltage VEN Vee Vee+ 0.8 V Receiver Differential data output swing Vout,pp 300 850 mV Data output rise time, fall time tr 28 ps LOS Fault VLOS fault 2 VccHOST V LOS Normal VLOS norm Vee Vee+0.8 V Power Supply Noise Tolerance VccT/VccR Per SFF-8431 Rev 4.1 mVpp Notes: 1. Connected directly to TX data input pins. AC coupling from pins into laser driver IC. 2. Into 100 differential termination. 3. 20 - 80% . Measured with Module Compliance Test Board and OMA test pattern. Use of four 1's and four 0's in sequence in the PRBS^9 is an acceptable alternative [1]. 4. LOS is an open collector output. Should be pulled up with 4.7k - 10k on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V. 5. Testing methodology per [1]. IV. Input Equalization and Output Emphasis Controls Finisar FCCG125SD1Cxx provide non-adaptive input equalization and output emphasis controls, allowing the host to select pre-set levels of optimization of the electrical high-speed signals of the transceiver's transmitter input and receiver output, via the 2-wire communication, as defined in the SFF-8472[2]. Finisar Corporation - November 2018 Rev. B2 Page 3 Ref. 1 2 3 4 4 5 FCCG125SD1Cxx Product Specification V. General Specifications Parameter Symbol Bit Rate BR Bit Error Ratio BER Notes: 1. Pre-FEC, tested with a PRBS 231 - 1. Min Typ 25.78125 Max Units Gb/s 10-8 Ref. 1 VI. Connectivity Diagnostics(R) Technology Finisar FCCG125SD1Cxx are equipped with Connectivity Diagnostics(R), which combines the pull-tabs' LED lights with the out-of-band signaling between the transceivers at the two ends of the AOC. Three features are currently implemented: Helps locate the other end of the AOC. Manually pushing-in either pull tab will light up their LED lights on both ends. Reports the health status of the AOC. Any Digital Diagnostic Monitoring warning/alarm events, transmitter's fault or receiver's loss of signal, will light up the pull-tab LED lights of both ends. Allows the host to control the AOC pull-tabs' LED lights. Writing a command via the 2-wire communication interface of the near-end AOC transceiver will light up the pull-tabs' LED lights of both ends. A detailed description of Connectivity Diagnostics(R) is provided in Finisar's Application Note AN-2158[6]. VII. Environmental Specifications The following table shows the operating temperature range of the FCCG125SD1Cxx: Parameter Case Operating Temperature Symbol Top Min 0 Typ Max 70 Units C Ref. VIII. Regulatory Compliance The FCCG125SD1Cxx SFPwire(R), which contains laser devices, is a Class 1 laser product and complies with 21CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007, and it complies with EN(IEC) 60825 Edition 1.2 regulations. The 25G SFPwire(R) is RoHS compliant per Directive 2011/65/EU[4,5]. Copies of certificates are available at Finisar Corporation upon request. Finisar Corporation - November 2018 Rev. B2 Page 4 FCCG125SD1Cxx Product Specification VIX. Mechanical Specifications The FCCG125SD1Cxx SFPwire SFP+ cable ends are compatible with the SFF-8432 specifications and provide a rigid pull tab whose color is opaque, when the embedded LED light is not lit up, or amber, when illuminated. Figure 2. FCCG125SD1Cxx Mechanical Dimensions. Finisar Corporation - November 2018 Rev. B2 Page 5 FCCG125SD1Cxx Product Specification FCCG125SD1Cxx SFPwire(R) cable details Description Jacket Material Min Typ PVC Jacket Color Orange Flammability Rating OFNR Outer Diameter Tensile Load (Short Term) Tensile Load (Long Term) Crush Resistance Impact Resistance Flexing Twist Bend Cable to SFP+ Plug Connection Bend Radius (Short Term) Bend Radius (Long Term) Durability 2.8 3.0 Max Units 3.2 200 100 mm N N N/mm N*m Cycles 10 0.5 300 90 25 30 100 Finisar Corporation - November 2018 Rev. B2 Notes PVC Aqua available upon request Plenum Cable option available upon request FOTP-41 FOTP-25 FOTP-104 Exceeds FOTP-85 Newtons mm mm Cycle Min Page 6 FCCG125SD1Cxx Product Specification X. PCB Layout and Bezel Recommendations Finisar Corporation - November 2018 Rev. B2 Page 7 FCCG125SD1Cxx Product Specification Figure 3. Finisar Corporation - November 2018 Rev. B2 Page 8 FCCG125SD1Cxx Product Specification Figure 4. Finisar Corporation - November 2018 Rev. B2 Page 9 FCCG125SD1Cxx Product Specification XI. Host - Active optical cable end Interface Block Diagram Figure 5. Finisar Corporation - November 2018 Rev. B2 Page 10 FCCG125SD1Cxx Product Specification XII. References 1. "Specifications for Enhanced 8.5 and 10 Gigabit Small Form Factor Pluggable Module `SFP+ `", SFF Document Number SFF-8431, Revision 4.1. 2. "Improved Pluggable Formfactor", SFF Document Number SFF-8432, Revision 4.2, April 18, 2007. 3. Directive 2011/65/EU of the European Parliament and of the Council "on the restriction of the use of certain hazardous substances in electrical and electronic equipment". Certain products may use one or more exemption as allowed by the directive. 4. "Application Note AN-2038: Finisar Implementation of RoHS Compliant Transceivers", Finisar Corporation, January 21, 2005. 5. "Diagnostic Monitoring Interface for Optical Transceivers", SFF Document Number SFF-8472, revision 12.2, November 21, 2014. 6. "Application Note AN-2158: Finisar's Connectivity Diagnostics(R) for Active Optical Cables" Finisar Corporation, rev. B5, April 2017. XIII. For More Information Finisar Corporation 1389 Moffett Park Drive Sunnyvale, CA 94089-1133 Tel. 1-408-548-1000 Fax 1-408-541-6138 sales@finisar.com www.finisar.com Finisar Corporation - November 2018 Rev. B2 Page 11