GO2952 CWDM SINGLE OPTICAL TRANSMITTER MODULE (NON-MSA) Datasheet name: GO2952_doc2.pdf Contact information: info@embrionix.com www.embrionix.com GO2952 CWDM Single Optical Transmitter Features The GO2952 contains a DFB laser transmitter designed to provide error-free transmission of signals from 50Mbps to 3Gbps. The GO2952 is hot-pluggable with typical power consumption of 405mW using a single power supply of +3.3V. * Robust error free transmission of signals from 50Mbps to 3Gbps * Up to 50km reach in a 3Gbps CWDM installation * Available wavelengths: 1270nm ~ 1610nm, 20nm spacing * Supports video pathological patterns for SD-SDI, HD-SDI and 3G-SDI * Hot-pluggable * Laser disable pin The GO2952 provides extensive operational status monitoring through an I2C interface. Optical power, bias current, supply voltage and operating temperature are monitored. If a parameter monitored is outside the pre-defined range, the alarm flag associated with the parameter will be raised. * Digital diagnostics and control via I2C interface including: Ordering Information Monitoring laser bias current, average output power, supply voltage and temperature Part Number Package Wavelength Temp. Range Alarm reporting with self shut down when GO2952-27CH SFP 1271nm 0C to 70C GO2952-29CH SFP 1291nm 0C to 70C GO2952-31CH SFP 1311nm 0C to 70C transmitter is at fault Module ID polling * Single +3.3V power supply * Low power consumption -- typically 405mW GO2952-33CH SFP 1331nm 0C to 70C * RoHS compliant GO2952-35CH SFP 1351nm 0C to 70C * Operating temperature range: 0C to 70C GO2952-37CH SFP 1371nm 0C to 70C * 56.5mm x 13.4mm x 8.6mm SFP Package GO2952-39CH SFP 1391nm 0C to 70C * SMPTE 297-2006 compatible GO2952-41CH SFP 1411nm 0C to 70C Applications GO2952-43CH SFP 1431nm 0C to 70C * SMPTE 297-2006 compatible electrical-to-optical interfaces GO2952-45CH SFP 1451nm 0C to 70C * Uncompressed video transport systems GO2952-47CH SFP 1471nm 0C to 70C GO2952-49CH SFP 1491nm 0C to 70C GO2952-51CH SFP 1511nm 0C to 70C GO2952-53CH SFP 1531nm 0C to 70C GO2952-55CH SFP 1551nm 0C to 70C GO2952-57CH SFP 1571nm 0C to 70C GO2952-59CH SFP 1591nm 0C to 70C GO2952-61CH SFP 1611nm 0C to 70C Description The GO2952 is a single channel CWDM optical transmitter module designed to transmit optical serial digital signals as defined in SMPTE 297-2006. The GO2952 is specifically designed for robust performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates. GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 www.gennum.com 1 of 23 Proprietary & Confidential Revision History Version ECR Date 0 157039 October 2011 1 157263 November 2011 2 157987 April 2012 Changes and/or Modifications New document. Updated Table 3-6. Updated extinction ratio in Table 3-2. Contents Features.................................................................................................................................................................1 Description...........................................................................................................................................................1 Ordering Information.......................................................................................................................................1 Revision History .................................................................................................................................................2 1. Functional Block Diagram..........................................................................................................................3 2. Pin Specifications ..........................................................................................................................................4 2.1 Pin Configuration .............................................................................................................................4 2.2 Pin Descriptions ................................................................................................................................4 2.3 Host Board Power Supply Requirements .................................................................................5 2.4 Optical Connector Requirements ................................................................................................6 3. Product Specifications .................................................................................................................................7 3.1 Absolute Maximum Ratings ..........................................................................................................7 3.2 Optical Performance Specifications ...........................................................................................7 3.3 DC Electrical Specifications ..........................................................................................................9 3.4 AC Electrical Specifications ..........................................................................................................9 3.5 Supporting Circuit Specifications ............................................................................................ 10 3.5.1 In-Rush Current Control Circuit ................................................................................... 10 3.5.2 Digital Diagnosis ................................................................................................................ 10 4. Application Reference Design ............................................................................................................... 17 4.1 Typical Application Circuit ........................................................................................................ 17 5. References and Relevant Standards .................................................................................................... 18 6. Package Information ................................................................................................................................. 19 6.1 Package Dimensions ..................................................................................................................... 19 6.2 Marking Information .................................................................................................................... 20 6.3 PCB Layout Recommendations ................................................................................................. 21 GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 2 of 23 Proprietary & Confidential 1. Functional Block Diagram Feedback Differential Electrical Input Laser Driver Tx_Disable I2C Bus Digital Diagnostics TOSA Laser + PINmon 1270 nm to 1610nm Tx provision and analog maintenance Figure 1-1: GO2952 Functional Block Diagram GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 3 of 23 Proprietary & Confidential 2. Pin Specifications 2.1 Pin Configuration Towards Bezel TX_DIS 20 NC TD- 19 3 NC TD+ 18 4 VEE VEE 17 5 I2C CLK VCC_TX 16 1 VEE 2 6 2 I C DATA NC 15 7 VEE NC 14 8 NC NC 13 9 NC NC 12 10 NC VEE 11 Towards ASIC Figure 2-1: Pin Configuration for GO2952 2.2 Pin Descriptions Table 2-1: Pin Descriptions Number Name Type 1 VEE Ground 2 NC No Connect No Connection 3 NC No Connect No Connection 4 VEE Ground 5 I2C CLK Digital (Input) I2C Clock 6 I2C DATA Digital (Bi-Directional) I2C Data GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 Description Ground connection. Connect to GND. Ground connection. Connect to GND. 4 of 23 Proprietary & Confidential Table 2-1: Pin Descriptions (Continued) Number Name Type Description 7 VEE Ground 8 NC No Connect No Connection 9 NC No Connect No Connection 10 NC No Connect No Connection 11 VEE Ground 12 NC No Connect No Connection 13 NC No Connect No Connection 14 NC No Connect No Connection 15 NC No Connect No Connection 16 VCC_TX Power 17 VEE Ground 18 TD+ Input Positive Differential Input 19 TD- Input Negative Differential Input 20 TX_DIS Digital (Input) Ground connection. Connect to GND. Ground connection. Connect to GND. Transmitter Power Supply Ground connection. Connect to GND. Transmitter Disable. The bias current and modulation current are turned off if TX1_Dis = HIGH. Internal 4.7k pull-up. 2.3 Host Board Power Supply Requirements The host board is required to provide a regulated and filtered power supply of 3.3V +/5% for the GO2952 via the on board SFP connector. The host board is required to filter the VCC_TX power supply as recommended by the SFP MSA. Figure 2-2 shows the recommended board supply filtering. When the host board is loaded with a resistive load in place of the SFP module and sourcing the maximum rated current, the peak-to-peak power supply noise measured on the SFP connector should comply to Table 2-2. 1H 3.3V V CC_Tx 0.1F GO2952 10F 0.1F 10F Host Board Figure 2-2: Recommended Host Board Supply Filtering GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 5 of 23 Proprietary & Confidential Table 2-2: Host Board Power Supply Noise Requirement at VCCR Frequency (MHz) Peak-to-Peak Noise Amplitude (%) DC-1 2 1-10 3 2.4 Optical Connector Requirements An LC connector with PC/UPC polish is required for each port. GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 6 of 23 Proprietary & Confidential 3. Product Specifications 3.1 Absolute Maximum Ratings Table 3-1 lists the absolute maximum ratings for the GO2952. Conditions exceeding the limits listed may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3-1: Absolute Maximum Ratings Parameter Conditions Value/Units Supply Voltage - 4V Operating Case Temperature - -20C < TCASE < 80C Storage Temperature - -40C < TSTG < 100C ESD tolerance on all pins - 1kV HBM Relative Humidity (non-condensing) - 5% - 95% RH 3.2 Optical Performance Specifications Table 3-2 lists the optical performance specifications for the GO2952. Table 3-2: Optical Performance Specifications All specifications apply for TCASE = 0C to 70C and VCC = 3.3V 5% unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Notes Wavelength - X-6.5 X X+6.5 nm 1 Spectral Line Width - - - 0.2 1.0 nm - POUT - 0 +2.5 +5.0 dBm - ER - 8 - - dB - System Average Optical Output Power Extinction Ratio GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 7 of 23 Proprietary & Confidential Table 3-2: Optical Performance Specifications (Continued) All specifications apply for TCASE = 0C to 70C and VCC = 3.3V 5% unless otherwise noted. Parameter Optical Signal Intrinsic Jitter Symbol - Condition Min Typ Max Units Notes Measured with PRBS - 40 60 ps 2 SMPTE 424M 2.97Gbps Pathological - 50 90 ps 2 SMPTE 292M 1.485Gbps Pathological - 60 120 ps 2 SMPTE 259M 270Mbps Pathological - 110 200 ps 2 SMPTE 424M 2.97Gbps - 130 180 ps 2 SMPTE 292M 1.485Gbps - 175 270 ps 2 SMPTE 259M 270Mbps - 300 800 ps 2 SMPTE 424M 2.97Gbps - 130 180 ps 2 SMPTE 292M 1.485Gbps - 175 270 ps 2 SMPTE 259M 270Mbps - 300 800 ps 2 223-1 and colour bar test signal at 2.97Gbps, 1.485Gbps, 270Mbps Optical Signal Rise Time tr (20% to 80%) Optical Signal Fall Time tf (20% to 80%) NOTES: 1. X = Centre Wavelength: 1271, 1291, 1311, 1331, 1351, 1371, 1391, 1411, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591 & 1611nm 2. Measured following a fourth-order Bessel-Thompson filter with a bandwidth of 0.75 x clock frequency corresponding to the serial data rate. GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 8 of 23 Proprietary & Confidential 3.3 DC Electrical Specifications Table 3-3 lists the DC electrical specifications for the GO2952. Table 3-3: DC Electrical Specifications Parameter Symbol Condition Min Typ Max Units Notes TCASE - 0 - 70 C 1 VCC - 3.13 3.3 3.47 V 1 Total Power Consumption - - - 405 550 mW 2 Input Data Amplitude - - 0.2 - 1.2 Vpp 3 Laser Bias Current Monitoring Accuracy - - -1 - +1 dB 2 Laser Power Monitoring Accuracy - - -1 - +1 dB 2 System Operating Temperature Range Power Supply Voltage Laser NOTES 1. Outside the specified range, performance is not guaranteed. 2. Specifications apply at the beginning of life. 3. AC-coupled 50 single-ended termination. 3.4 AC Electrical Specifications Table 3-4 lists the AC electrical specifications for the GO2952. Table 3-4: AC Electrical Specifications Parameter Bit Rate Symbol Condition Min Max Units BR - 50 3000 Mbps Tx_Disable Assert Time t_off Time from rising edge of TX_DIS to when the optical output falls below 10% of nominal - 10 s Tx_Disable Negate Time t_on Time from falling edge of TX_DIS to when the modulated optical output rises above 90% of nominal - 1 ms Time to Initialize t_init From power on - 300 ms - 400 kHz Serial ID Clock Rate f_serial_clock GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 - 9 of 23 Proprietary & Confidential 3.5 Supporting Circuit Specifications 3.5.1 In-Rush Current Control Circuit Due to the hot-pluggable requirement, the GO2952 has built-in circuits to limit the in-rush current upon hot insertion. The specifications of the in-rush limiting circuits are summarized in Table 3-5. Table 3-5: In-rush Current Limiting Circuits Specifications Parameter Value Max. In-rush current ramp rate 50mA/ms Max. In-rush current 30mA over steady state 3.5.2 Digital Diagnosis 3.5.2.1 I2C Bus Interface The I2C bus interface uses the 2-wire serial CMOS E2PROM protocol. The serial interface meets the following specifications: 1. Support a maximum clock rate of 400kHz. 2. Input/Output levels comply with LVCMOS/LVTTL or compatible logics. Low: 0 - 0.8V High: 2.0 - 3.3V Undefined: 0.8 - 2.0V 3.5.2.2 Serial Interface Memory Map Module identification and diagnostic information is accessible through the address map shown in Table 3-6. Table 3-6: Serial Interface Memory Map Address Size Name Description and Value of the Field Base ID Fields (Block Address: A0h) 0 1 Identifier Type of serial transceiver. 83h 1 1 Ext. Identifier Extended identifier of type of serial transceiver. 04h 2 1 Connector Code for connector type. 07h for LC connectors. GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 10 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size Name Description and Value of the Field 3 1 Standards Compliance 41h, for SMPTE259M/344M/292M/424M and SMPTE 297. 4-10 8 Transceiver Code Code for electronic compatibility or optical compatibility. Not applicable for GO2952. 11 1 Encoding Code for serial encoding algorithm. Value: 03H for NRZ. 12 1 BR, Nominal Nominal bit rate, units of 100 Mbps, 1Eh for 3Gbps, 13 1 Reserved Xxh 14 1 Length(9mm) km Link length supported for standard SMF, units of km, 32h for 50km. 15 1 Length(9mm) Link length supported for standard SMF, units of 100 m, 00h 16 1 Length (50mm) Link length supported for 50/125 mm fiber, units of 10 m. 00h 17 1 Length (62.5mm) Link length supported for 62.5/125 mm fiber, units of 10 m. 00h 18 1 Length (Copper) Link length supported for copper, units of meters. 00h 19 1 Reserved Xxh 20-35 16 Vendor name SFP with OM transceiver vendor name (ASCII). G E N N U M 20 1 G 47h 21 1 E 45h 22 1 N 4Eh 23 1 N 4Eh 24 1 U 55h 25 1 M 4Dh 26-35 10 - 20h for each byte 36 1 Reserved - 37-39 3 Vendor OUI SFP with OM transceiver vendor IEEE company ID. 00 00 00h 40-55 16 Vendor PN Part number provided by SFP with OM transceiver vendor. G O 2 9 5 2. 40 1 G 47h 41 1 O 4Fh 42 1 2 32h 43 1 9 39h GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 11 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size Name Description and Value of the Field 44 1 5 35h 45 1 2 32h 46 1 X Model dependent. 47 1 X Model dependent. 48 1 C 43h 49 1 H 48h 50-55 6 - 20h for each byte. 56-58 3 - Reserved 59 1 Vendor Rev Revision level for part number provided by vendor. 60 1 Wavelength1 XX for the middle two digits of the wavelength. 61-62 2 - Reserved 63 1 CC_BASE Check code for Base ID Fields (The value of the lower 8 bits of the sum of the contents from address 0 to 62). Extended ID Fields (Block Address: A0h) 64-65 2 Options Indicates which optional SFP with OM signals are implemented. 64 1 - Xxh 65 1 - x001100xh 66 1 BR, max Upper bit rate margin, units of %, 5h. 67 1 BR, min Lower bit rate margin, units of %, 5Fh. 68-83 16 Vendor SN Serial number provided by vendor (ASCII) 84-85 2 Year Manufacturing date code (ASCII). 86-87 2 Month Manufacturing date code (ASCII). 88-89 2 Day Manufacturing date code (ASCII). 90-91 2 Blank - 92 1 Calibration flag 20h for calibrated average output power 93 1 - E0h, Enhanced alarm/warning flags. 94 1 Reserved Xxh 95 1 CC_EXT Check code for the Extended ID Fields (The value of the lower 8 bits of the sum of the contents from address 64 to 94) 96-127 32 Reserved - GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 12 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size Name Description and Value of the Field Alarm Flags and OM Output Calibration ID Fields (Block Address: A2h) 0-1 2 Temp High Alarm MSB at lower address. 70C ambient 2-3 2 Temp Low Alarm MSB at lower address. 0C ambient 4-5 2 Temp High Warning MSB at lower address. 65C ambient 6-7 2 Temp Low Warning MSB at lower address. 5C ambient 8-9 2 Supply Voltage High Alarm MSB at lower address. 3.6V 10-11 2 Supply Voltage Low Alarm MSB at lower address. 3.0V 12-13 2 Supply Voltage High Warning MSB at lower address. 3.47V 14-15 2 Supply Voltage Low Warning MSB at lower address. 3.14V 16-17 2 Laser Bias High Alarm MSB at lower address. 100mA. 18-19 2 Laser Bias Low Alarm MSB at lower address. 5mA. 20-21 2 Laser Bias High Warning MSB at lower address. 90mA. 22-23 2 Laser Bias Low Warning MSB at lower address. 10mA 24-25 2 Tx Power High Alarm MSB at lower address. 5.5dBm 26-27 2 Tx Power Low Alarm MSB at lower address. -0.5dBm 28-29 2 Tx Power High Warning MSB at lower address. 5dBm 30-31 2 Tx Power Low Warning MSB at lower address. 0dBm 32-94 64 Reserved. - 95 1 CC_EXT Byte 95 contains the low order 8 bits of the check sum of byte 0 -94 96 1 Temperature MSB Internally measured module temperature 97 1 Temperature LSB Internally measured module temperature 98 1 VCC MSB Internally measured module supply voltage GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 13 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size Name Description and Value of the Field 99 1 VCC LSB Internally measured module supply voltage 100 1 Laser Bias MSB Internally measured laser bias current. 7530h corresponds to 60mA. All other readings should be scaled linearly using this factor. 101 1 Laser Bias LSB Internally measured laser bias current. 7530h corresponds to 60mA. All other readings should be scaled linearly using this factor. 102 1 Tx Power MSB Internally measured Tx Power. 103 1 Tx Power LSB Internally measured Tx Power. 104-109 11 Reserved - 110 1 N/A Bit 7 N/A Bit 6 Reserved Bit 5 N/A Bit 4 N/A Bit 3 Tx Fault Bit 2 N/A Bit 1 Data_Ready Bit 0 Conversion Update - Temp Update Bit 7 goes to high after a temperature update VCC Update Bit 6 goes to high after a VCC update Mon1 Update Bit 5 goes to high after a Tx bias current update Mon2 Update Bit 4 goes to high after a Tx power update Mon3 Update Bit 3 goes to high after a Tx modulation current update. Reserved Bit 0 to Bit 2. 111 1 GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 14 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size 112 1 113 114-115 1 2 Name Description and Value of the Field Temp High Alarm Flag Bit 7, set when the internal temperature exceeds the high temp alarm threshold. Temp Low Alarm Flag Bit 6, set when the internal temperature goes below the low temp alarm threshold. Supply Voltage High Alarm Flag Bit 5, set when the internal VCC exceeds the supply voltage high alarm threshold. Supply Voltage Low Alarm Flag Bit 4, set when the internal VCC goes below the supply voltage low alarm threshold. Laser Bias High Alarm Flag Bit 3, set when the monitored laser bias current exceeds the laser bias high alarm threshold. Laser Bias Low Alarm Flag Bit 2, set when monitored laser bias current goes below the laser bias low alarm threshold. Tx Power High Alarm Flag Bit 1, set when the monitored Tx power exceeds the Tx power high alarm threshold. Tx Power Low Alarm Flag Bit 0, set when monitored Tx power current goes below the Tx power low alarm threshold. Mod Current High Alarm Flag Bit 7, set when the monitored laser modulation current exceeds the laser bias high alarm threshold. Mod Current Low Alarm Flat Bit 6, set when monitored laser bias current goes below the laser modulation low alarm threshold. Reserved Bit 0 - 5. Reserved - GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 15 of 23 Proprietary & Confidential Table 3-6: Serial Interface Memory Map (Continued) Address Size 116 1 117 118-119 1 2 Name Description and Value of the Field Temp High Warning Flag Bit 7, set when the internal temperature exceeds the high temp warning threshold. Temp Low Warning Flag Bit 6, set when the internal temperature goes below the low temp warning threshold. Supply Voltage High Warning Flag Bit 5, set when the internal VCC exceeds the supply voltage high warning threshold. Supply Voltage Low Warning Flag Bit 4, set when the internal VCC goes below the supply voltage low warning threshold. Laser Bias High Warning Flag Bit 3, set when the monitored laser bias current exceeds the laser bias high warning threshold. Laser Bias Low Warning Flag Bit 2, set when monitored laser bias current goes below the laser bias low warning threshold. Tx Power High Warning Flag Bit 1, set when the monitored Tx power exceeds the Tx power high warning threshold. Tx Power Low Warning Flag Bit 0, set when monitored Tx power current goes below the Tx power low warning threshold. Mod Current High Warning Flag Bit 7, set when the monitored laser modulation current exceeds the laser bias high alarm threshold. Mod Current Low Warning Flag Bit 6, set when monitored laser bias current goes below the laser modulation low alarm threshold. Reserved Bit 0 - 5 Reserved - Vendor Specific ID Fields 120-127 8 Vendor Specific - 128-247 8 Vendor Writeable Area - 248-288 41 Vendor Specific - GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 16 of 23 Proprietary & Confidential 4. Application Reference Design 4.1 Typical Application Circuit Figure 4-1 shows a typical application circuit for the GO2952. 1 VCC_3V3 VCC_3V3 2 3 10k 10k 2 I C CLK I2C DATA 4 5 6 7 8 9 10 GO2952 VEE TX_DIS NC TD- NC TD+ VEE VEE I2C CLK I2C DATA VCC_TX NC VEE NC NC NC NC NC NC VEE 20 TX1_DIS 19 TD1- 18 TD1+ Differential From GS2965 Reclocker 17 16 100nF 15 1H 10F VCC_3V3 14 13 12 11 Figure 4-1: Typical Application Circuit GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 17 of 23 Proprietary & Confidential 5. References and Relevant Standards Table 5-1: References and Relevant Standards INF-8074i Rev 1.0 SFP (Small Formfactor Pluggable) Transceiver SMPTE 259M-2008 SDTV Digital Signal/Data - Serial Digital Interface SMPTE 292M-2008 1.5 Gb/s Signal / Data Serial Interface SMPTE 297-2006 Serial Digital Fiber Transmission System for SMPTE 259M, SMPTE 344M, SMPTE 292 and SMPTE 424M Signals SMPTE 344M-2000 540 Mb/s Serial Digital Interface SMPTE 424M-2006 3 Gb/s Signal/Data Serial Interface ITU-T G.694.2 Spectral grids for WDM applications: CWDM wavelength grid GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 18 of 23 Proprietary & Confidential 6. Package Information 6.1 Package Dimensions A common mechanical outline, as shown in Figure 6-1, is used for all SFP modules. Since the GO2952 is a single channel device, the receptacle for channel 2 is plugged with a plastic insert. Figure 6-1: Common SFP Package Outline GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 19 of 23 Proprietary & Confidential 6.2 Marking Information Figure 6-2 illustrates the markings on the GO2952. Table 6-1 provides a description of the parameters in the marking diagram. Figure 6-2: GO2952 Marking Diagram Table 6-1: Marking Information Parameter Description XX 2-digit wavelength code. See Ordering Information. ZZZZZZZZZ 9-digit serial number. UUUU Channel wavelength in nanometers. YYYY Year of manufacture. WW Week of manufacture. GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 20 of 23 Proprietary & Confidential 6.3 PCB Layout Recommendations Notes: 1. Datum and basic dimensions established by customer 2. Pads and vias are chassis-ground in 11 places 3. Through-holes and plating are optional Figure 6-3: Host PCB Layout - Part 1 GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 21 of 23 Proprietary & Confidential Figure 6-4: Host PCB Layout - Part 2 GO2952 CWDM Single Optical Transmitter Data Sheet 57268 - 2 April 2012 22 of 23 Proprietary & Confidential DOCUMENT IDENTIFICATION CAUTION APPLICATION NOTE ELECTROSTATIC SENSITIVE DEVICES Information relating to this product and the application or design described herein is believed to be reliable, however such information is provided as a guide only and Gennum assumes no liability for any errors in this document, or for the application or design described herein. Gennum reserves the right to make changes to the product or this document at any time without notice. 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