a e re 8 AdLib OCR Evaluation systems Preliminary Data Sheet July 2002 NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Applications . SONET OC-48 LR-2, SDH L-16.2 applications lw r Available in a small form-factor, metal package with LC receptacle connector, the NLT25-80-BA transceiver is a high-performance, cost-effective, optical transceiver for SONET/SDH applications . Features . Multisource agreement compliant SFF package . LC duplex receptacle . Metal package for superior EMI performance . Uncooled 1550 nm DFB laser transmitter with automatic output power control . Transmitter disable input . Wide dynamic range receiver with InGaAs PIN photodetector . LVTTL signal-detect output . Low power dissipation . Single 3.3 V power supply . Built-in APD dc-dc converter . ac-coupled LVPECL/CML compatible data inputs and CIVIL compatible data outputs . Operating temperature range of 0 C to 70 C . Telecom reliability (GR-468-CORE RT) . Wave solderable and aqueous wash compatible . High-speed optical data interface for shelf-to-shelf interconnect Description The NLT25-80-BA transceiver is a high-speed, costeffective optical transceiver that is intended for 2.488 Gbits/s shelf-to-shelf optical interconnect applications, as well as SONET OC-48 LR-2 and SDH L-16.2 80 km applications . The transceiver features Agere Systems' optics and is packaged in a narrow-width metal housing with an LC duplex receptacle . The 20-pin package pinout conforms to a multisource transceiver agreement . The transmitter features the ability to interface to both LVPECL and CIVIL differential logic level data inputs via ac-coupled inputs . The transmitter also features an LVTTL logic level disable input and laser bias and back-facet monitor outputs . The receiver features ac-coupled differential CIVIL logic level data outputs, an LVTTL logic level signal-detect output, and direct access to the APD bias input for photocurrent monitoring purposes. AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Preliminary Data Sheet July 2002 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device . These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Table 1 . Absolute Maximum Ratings Parameter Supply Voltage Operating Case Temperature Range Storage Temperature Range Lead Soldering Temperature/Time Operating Wavelength Range Min 0 0 -40 1 .2 Symbol VCC Tc Ts X I Max 5 70 85 260/10 1 .6 Unit V C C C/s pm Pin Information 0 0 0 0 0 0 0 0 0 0 10 9 8 7 6 5 4 3 2 1 11 12 13 14 15 16 17 18 1920 0 0 0 0 0 0 0 0 0 0 0 wx 0 TX Figure 1 . Top View of the NLT25-80-BA Transceiver, 20-Pin Configuration Table 2. Receiver Pin Descriptions Pin # Symbol Functional Description Logic Family MS MS NA 1 VPD Mounting Studs. The mounting studs are provided for transceiver mechanical attachment to the circuit board . The mounting studs must be connected to the equipment chassis ground . Photodetector Bias Input . This lead supplies bias for the APD . 2 VEER NA VEER Receiver Signal Ground . Receiver Signal Ground . 4 NIC No Internal Connection . NA 5 NIC No Internal Connection . NA 6 VEER Receiver Signal Ground . NA 7 VCCR Receiver Power Supply. NA 8 SD Signal Detect. Normal operation : logic one output. Fault condition : logic zero output. 9 RDRD + Received Data Out. ac-coupled CML Received Data Out. ac-coupled CML 10 2 NA NA LVTTL Agere Systems Inc . AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Pin Information (continued) Table 3. Transmitter Pin Descriptions Pin # Symbol Functional Description 11 12 VCCT VEET 13 TDis 14 TD+ 15 TD- Transmitter Data In. An internal 50 0 termination is provided consisting of a 100 0 resistor between the TD+ and TD- pins. Transmitter Data In. See TD+ pin for terminations. 16 VEET Transmitter Signal Ground . NA 17 BMON(-) Laser Diode Bias Current Monitor-Negative End. Optional feature . If feature is not used, do not connect. The laser bias current is accessible as a do voltage by measuring the voltage developed across pins 17 and 18. NA 18 BMON(+) NA 19 PMON(-) Laser Diode Bias Current Monitor-Positive End. Optional feature . If feature is not used, do not connect. See pin 17 description . Laser Diode Optical Power Monitor-Negative End . Optional feature . If feature is not used, do not connect. The back-facet diode monitor current is accessible as a voltage proportional to the photocurrent through a 200 0 resistor between pins 19 and 20. 20 PMON(+) Laser Diode Optical Power Monitor-Positive End . Optional feature . If feature is not used, do not connect. See pin 19 description . NA Transmitter Power Supply. Transmitter Signal Ground . Transmitter Disable. Logic Family NA NA LVTTL ac-coupled PECL/CML ac-coupled PECL/CML NA Electrostatic Discharge Application Information Caution : This device is susceptible to damage as a result of electrostatic discharge (ESD) . Take proper precautions during both handling and testing . Follow EIA0Standard EIA-625. The receiver section is a highly sensitive fiber-optic receiver. Although the data outputs are digital logic levels (CML), the device should be thought of as an analog component . When laying out system application boards, the transceiver should receive the same type of consideration given to a sensitive analog component. Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD . Agere Systems employs a human-body model (HBM) for ESD susceptibility testing and protection-design evaluation. ESD voltage thresholds are dependent on the critical parameters used to define the model . A standard HBM (resistance = 1 .5 kO, capacitance = 100 pF) is widely used and, therefore, can be used for comparison purposes . The HBM ESD threshold established for the NLT25-80-BA is 1000 V. Agere Systems Inc. Printed-Wiring Board Layout Considerations A fiber-optic receiver employs a very high gain, widebandwidth transimpedance amplifier. This amplifier detects and amplifies signals that are only tens of nA in amplitude when the receiver is operating near its sensitivity limit . Any unwanted signal currents that couple into the receiver circuitry cause a decrease in the receiver's sensitivity and can also degrade the performance of the receiver's signal-detect (SD) circuit . 3 AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Application Information (continued) Printed-Wiring Board Layout Considerations (continued) To minimize the coupling of unwanted noise into the receiver, careful attention must be given to the printedwiring board. At a minimum, a double-sided printed-wiring board (PWB) with a large component-side ground plane beneath the transceiver must be used . In applications that include many other high-speed devices, a multilayer PWB is highly recommended . This permits the placement of power and ground on separate layers, which allows them to be isolated from the signal lines. Multilayer construction also permits the routing of sensitive signal traces away from high-level, high-speed signal lines. To minimize the possibility of coupling noise into the receiver section, high-level, high-speed signals such as transmitter inputs and clock lines should be routed as far away as possible from the receiver pins. Noise that couples into the receiver through the power supply pins can also degrade performance. It is recommended that the pi filter, shown in Figure 3, be used for both the transmitter and receiver power supplies . Data and Signal-Detect Outputs Due to the high switching speeds of CIVIL outputs, transmission line design must be used to interconnect components. To ensure optimum signal fidelity, both data and clock outputs should be terminated identically. The signal lines connecting the data outputs to the next device should be equal in length and have matched impedances . Controlled-impedance stripline or microstrip construction must be used to preserve the quality of the signal into the next component and to minimize reflections back into the receiver, which could degrade its performance. Excessive ringing due to reflections caused by improperly terminated signal lines makes it difficult for the component receiving these signals to decipher the proper logic levels and can cause transitions to occur where none were intended . Also, by minimizing high-frequency ringing, possible EMI problems can be avoided. 4 Preliminary Data Sheet July 2002 The signal-detect output is positive LVTTL logic. A logic low at this output indicates that the optical signal into the receiver has been interrupted or that the light level has fallen below the minimum signal-detect threshold . This output should not be used as an error rate indicator since its switching threshold is determined only by the magnitude of the incoming optical signal . SINGLE ENDED VOr+ DATA/CLOCK VOA DIFFERENTIAL VOr+ DATA/CLOCK VOA Figure 2. Data and Clock Output Logic Level Definitions Transceiver Processing When the process plug is placed in the transceiver's optical port, the transceiver and plug can withstand normal wave soldering and aqueous spray cleaning processes. However, the transceiver is not hermetic, and should not be subjected to immersion in cleaning solvents. The transceiver case should not be exposed to temperatures in excess of 125 C. The transceiver pins can be wave soldered at 260 C for up to 10 seconds. The process plug should only be used once. After removing the process plug from the transceiver, it must not be used again as a process plug; however, if it has not been contaminated, it can be reused as a dust cover. Agere Systems Inc . AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Transceiver Optical and Electrical Characteristics Table 4. Transmitter Optical and Electrical Characteristics (TC = 0 C to 70 C, Vcc = 3.135 V-3.465 V. All parameters must meet the specifications over the entire lifetime .) Parameter Average Optical Output Power Optical Wavelength Spectral Width Dispersion Penalty Side-mode Suppression ratio Dynamic Extinction Ratio Symbol Min Max Unit Po Xc -2 1500 3 1580 dBm AX20dB - <1 nm PD - 2 SMSR 30 - dB dB EXT 8.2 - dB Output Optical Eye nm Compliant with SONET GR-253-CORE and ITU-T 6.957 Eye Mask Requirements Power Supply Current Input Data Voltage-Single Ended' Input Data Voltage-Differential' ICCT - 150 mA VINp-p VINp-p 150 300 800 1600 mVp-p mVp-p VD Vcc V VEE + 0.8 V Transmit Disable Voltage2 Transmit Enable Voltage2 VEN Vcc - 0.9 VEE Laser Bias Voltage VBIAS 0.0 0.7 V VBF 0.01 0.2 V Laser Back-facet Monitor Voltage 1 . 50 E2 load, measured single ended . Differential operation is necessary for optimum performance. (See Figure 2 for a visual representation .) 2 . TTL compatible interface . Table 5. Receiver Optical and Electrical Characteristics (Tc = -40 C to +85 C, Vcc = 3.135 V-3 .465 V) Parameter Symbol Min Max Unit PI - -28 dBm Maximum Input Powerl Pnnaac -9 - dBm Power Supply Current ICCR - 150 mA VOUTP-p VOUTP-p 300 600 500 1000 mVp-p mVp-p LSTD LSTI -45 -45 -29 .0 -28 .5 dBm dBm Signal-detect Hysteresis Signal-detect Voltage3 Low High HYS 0.5 6 dB VOL VOH 0.0 2.4 0.8 VCC V V Signal-detect Response Time SDRT - 1 00 gs Average Sensitivityl Output Data Voltage-Single Ended2 Output Data Voltage-Differentia12 Signal-detect Switching Threshold Assert Deassert 1 . 223- 1 PRBS with a BER of 1 x 10-10 . 2 . 50 E2 load, measured single ended . Differential operation is necessary for optimum performance . (See Figure 2 for a visual representation .) 3 . TTL compatible interface . Agere Systems Inc . 5 AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Preliminary Data Sheet July 2002 Qualification and Reliability To help ensure high product reliability and customer satisfaction, Agere Systems is committed to an intensive quality program that starts in the design phase and proceeds through the manufacturing process. Optoelectronic modules are qualified to ITU GR-468-CORE remote terminal standards, using sampling techniques consistent with Telcordia Technologies T"" requirements. In addition, Agere Systems design, development, and manufacturing facilities have been certified to be in full compliance with the latest ISO(R)-9001 Quality System Standards . Table 6. Regulatory Compliance Feature Laser Eye Safety Test Method U .S. 21 CFR (J) 1040.10 and 1040. 11, IEC(R) 60825-1 1988, IEC 60825-2 1997 Performance CDRH compliant and Class 1 laser safe. Electrostatic Discharge (ESD) to MIL-STD 883C, Method 3015.4 Electrical Pins Class 1 (>1000 V). Electrostatic Discharge (ESD) to IEC 61000-4-2; 1999 Optical Connector Withstand discharges of 15 kV using an air-discharge probe. Electromagnetic Interference (EMI) Immunity FCC Part 15 Subpart J Class B, CISPR 22: 1997; Compliant with standards . EN 55022:1998 Class B, VCCI Class I IEC 61000-4-3-1998 Less than 1 dB change in receiver sensitivity with field strength of 3 V/m RMS, from 10 MHz to 1 GHz . Component UL (R)1950, CSA (R) C22 .2 #950, IEC 60950 :1999 - Flammability UL 94 V-0 - 6 Agere Systems Inc . AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Electrical Schematic BMoNBMON+ PMONPMON+ 17 18 ~ 19 20 3 kS2 3 kS2 10 S2 200 S2 VEET 3 kf2 3 kf2 TRANSMITTER DRIVER SFF TRANSCEIVER 12 NIC 16 TI) 15 TD+ 14 TDis 13 VCCT 11 VCCR 7 RD+ ul RECEIVER POSTAMPLIFIER IC4 T NIC SD VEER _L IC3 Ll =C1 10 RDNIC VCC IC5 =C2 VPD D_ L2 5 4 8 Ll = L2 = 1 I.H-4 .7 I.H" C1 = C2 = 10 nFt C3 = 4 .7 ItF-10 ItF C4 = C5 = 4 .7 ItF-10 ItF 2, 3, 6 1-968F.e " Ferrite beads can be used as an option . t For all capacitors, MLC caps are recommended . Figure 3. Power Supply Filtering for the Small Form-Factor Transceiver Agere Systems Inc . 7 AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Preliminary Data Sheet July 2002 Application Schematics Electrical Data Interface-Current Mode Logic (CML) Vcc (+3 .3 V) Vcc (+3 .3 V) (A) TRANSMITTER INTERFACE-dc COUPLED-(CML) Vcc (+3 .3 V) (B) RECEIVER INTERFACE-dc COUPLED-(CML) Figure 4. 3.3 V Transceiver Interface with 3.3 V ICs and CIVIL Agere Systems Inc . AdLib OCR EvalNetLight uation NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Application Schematics (continued) Alternate Electrical Data Interface Options Vcc (+3 .3 V) Vcc (+3 .3 V) " Optional ac-coupling capacitors; use ceramic X7R or equivalent . (A) TRANSMITTER INTERFACE-ac OR do COUPLED-(LVPECL) Vcc (+3 .3 V) Vcc (+3 .3 V) I.tF Z = 50 S2 Z = 50 E2 wF CML I (B) RECEIVER INTERFACE-ac COUPLED-(CML) 1-1033F.e Figure 5. 3.3 V Transceiver Interface with 3.3 V ICs Agere Systems Inc . AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Preliminary Data Sheet July 2002 Outline Diagrams Package Outline Dimensions are in inches and (millimeters) . a C~ ~ 0.530 m (13.46) v 1 .952 (49 .58) 0 .3833 (9 .731 ) 0 .125 (3 .18) O O 0 .160 (4 .06) (1 .78) 10 0 .246 (6 .25) 00 .01 ~ (0 .46) 0 .630 (16 .00) 0 .350 (8 .90) 0 .386 MAX . (9 .80) 0 .400 (10 .16) 0.394 (10 .02) 0 .776 (19 .71) Agere Systems Inc . AdLibNetLight OCRNLT25-80-BA Evaluation 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Outline Diagrams (continued) Printed-Wiring Board Layout Dimensions are in millimeters and (inches) . 7.59 (0.11 (2x) 0 2.29 MAX (0 .090) AREA FOR EYELETS (2x) 0 1.4 t 0.1 NOTE 1 (0 .055 t 0.004) A $ 0 0 .00 3.00 (0 .118) 4.57 (0 .1.80) 8.89 (0 .350) 7.11 6.00 (0 .236) (9x) 1.78J (0.070) (2x) 0 0.81 t 0.1 (0 .032 t 0.004) 3.08 (0.121) $ 0 (2x) 0 2.29 MAX (0 .090) A 1 (0 .140) 2.00 (0.79) 2.01 (0.79) 0.00 16 .00 REF (0 .630) I 9.59 0 .16 .400) ~(4x) 0 1 .4 t 0.1 NOTE 2 (0 .055 t 0 .004) A $ o .oo Notes : 1 . Holes for mounting studs must be tied to chassis ground . 2 . Holes for housing leads must be tied to signal ground . Agere Systems Inc . 1-1271(F) 11 AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver for Extended Long Reach Preliminary Data Sheet July 2002 Recommended Panel Opening Dimensions in millimeters and (inches) . O C 10 .16 0 .4 .2 5 .24 00000000000 (R)O +00 .0061 .006) O -0 0000000000 O~ 00000000000 09 B DETAIL A EIE]o ., ., ., ., ., .. ., ., ., ., U I B 1 (0 .039) A SOLDER POSTS 14 .22 0 .1 (0 .56 0 .004) 15 .75 MAX 15 .0 MIN (0 .62 MAX 0 .59 MIN) SECTION B-B 12 Agere Systems Inc . AdLib OCR Evaluation NetLight NLT25-80-BA 2 .5 Gbits/s 1550 nm Laser Transceiver Preliminary Data Sheet July 2002 for Extended Long Reach Laser Safety Information Class I Laser Product All versions of the transceiver are Class I laser products per CDRH, 21 CFR 1040 Laser Safety requirements . All versions are Class I laser products per IEC 60825-1 :1993. Caution : Use of controls, adjustments, and procedures other than those specified herein may result in hazardous laser radiation exposure. This product complies with 21 CFR 1040.10 and 1040.11 . Wavelength = 1310 nm Maximum power = 1 .58 mW Product is not shipped with power supply. NOTICE Unterminated optical receptacles can emit laser radiation . Do not view with optical instruments. Ordering Information Table 7. Ordering Information Description 2 x 10 single-mode SFF LC receptacle transceiver for 2.488 Gbits/s extended long-reach applications Device Code Comcode NLT25-80-BA 700010618 EIA is a registered trademark of the Electronic Industries Association . IEC is a registered trademark of The International Electrotechnical Commission . Telcordia Technologies is a trademark of Telcordia Technologies, Inc. ISO is a registered trademark of The International Organization for Standardization . UL is a registered trademark of Underwriters Laboratories, Inc. CSA is a registered trademark of Canadian Standards Association . For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http ://www.agere.com E-MAIL: docmaster@agere.com N. AMERICA: Agere Systems Inc ., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon Tel. (852) 3129-2000, FAX (852) 3129-2020 CHINA: (86) 21-5047-1212 (Shanghai), (86) 755-25881122 (Shenzhen) JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 6778-8833, TAIWAN : (886) 2-2725-5858 (Taipei) EUROPE : Tel. (44) 7000 624624, FAX (44) 1344 488 045 Agere Systems Inc . reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application . Agere, Agere Systems, and the Agere logo are trademarks of Agere Systems Inc. NetLight is a registered trademark of Agere Systems Inc . Copyright (c) 2002 Agere Systems Inc . AIIRights Reserved July 2002 DS02-183METR a 'ere s 8 y tems s