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| 155 Mb/s Logic Interface Laser Transmitter for OC3/STM1 Technical Data XMT5370155 Features * SONET/SDH Compliant to STM1 I-1, S-1.1 OC3 SR, IR-1 * -40C to +85C Operation * Compact 20 Pin Package * ECL/PECL Logic Interface * Multisourced Pinout * Fully Interchangeable High and Low Power Versions Description The XMT5370155 is a high performance uncooled optical laser transmitter for CCITT SDH and ANSI SONET applications. It is designed with an ECL/PECL logic interface for 155 Mb/s transmission. The transmitter incorporates several features which simplify system design. It may be operated with either +5 V or -5 V power supplies. Standard 10 KH ECL data interface enables direct interface with PECL or ECL logic. The compact transmitter module contains a pigtailed laser, data interface, bias and modulation control circuitry. Thus, no external components or adjustments are necessary. Finally, a laser disable input is provided to shut down the laser for standby or test purposes. The XMT5370155 has -10 dBm mean output power for short and intermediate reach systems. The XMT5370155 provides analog voltage outputs which are proportional to laser bias current and optical power. These may be used with external circuitry to detect end-of-life, or over temperature conditions. The transmitter is packaged in a 20 pin 0.4" pitch DIP. An evaluation board is available for this product. Contact your local representative for more details. Applications * * * * SONET/SDH Systems Single Mode ATM Fiber to the Home Data Communications Networks 2 Connection Diagram Top View Fiber Pigtail NC Laser Bias Monitor (+) NC Laser Bias Monitor (-) VEE VCC Transmit Disable VCC VCC NC f f f f f f f f f f 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 f f f f f f f f f f NC Laser Back Facet Monitor (+) VCC Laser Back Facet Monitor (-) DATA DATA VEE Case Ground (See note below) VCC Case Ground (See note below) VCC Pin Descriptions Pins 1, 3, 10, 20, NC: These pins should not be connected and should be left open circuit on the application PCB. Pin 2, Laser Bias Monitor (+): See Figure 1. Pin 4, Laser Bias Monitor (-): See Figure 1. Pins 5, 14, VEE: These pins are connected to ground in +5 V systems and -5 V in negative supply systems. If connected to -5 V supply, the network shown in Figure 3 should be placed as close as possible to these pins. Pins 6, 8, 9, 12, 18, VCC: These pins are connected to +5 V for positive supply systems and ground for -5 V systems. If connected to +5 V supply, the network shown in Figure 3 should be placed as close as possible to these pins. Pin 7, Transmit Disable: Pin 7 floats to VEE when open circuited, enabling the transmitter. It must be biased within +3 V of VCC to disable. Pins 11, 13, Ground: The XMT5370155 case is plastic, therefore these pins are not connected. Pins 15, 16, DATA, DATA: These are differential ECL inputs. If open circuited, they will float to VBB (VCC -1.3 V). Pin 17, Laser Back Facet Monitor (-): See Figure 2. Pin 19, Laser Back Facet Monitor (+): See Figure 2. TO DEVICE SUPPLY PIN 10 F 1.0 H 1 nF Pin 2 3 kW 10 Pin 4 3 kW Laser W Modulation Current IBIAS VEE Figure 1. Laser Bias Monitor Circuitry VCC Monitor Photodiode Pin 19 3 kW 200 Pin 17 3 kW W To Laser Bias Control Circuitry Figure 2. Back Facet Monitor Circuitry VOLTAGE SUPPLY 100 nF (-5 V or +5 V) Figure 3. Filter Network 3 XMT5370155 Block Diagram LASER PHOTODIODE (rear facet monitor) DATA DATA ECL INPUT DISABLE LASER MODULATOR LASER BIAS DRIVER LASER BIAS MONITOR LASER BIAS CONTROL REAR FACET MONITOR Functional Description The ECL inputs allow operation from many logic families and both single-ended or differential signals. As both DATA and DATA are internally tied to VBB, for single ended operation the unused input requires no connection or biasing. The disable function disables the laser bias and modulator. The switching threshold is VCC -3.2 V. If this input is not connected the module is enabled. This input may be connected to a CMOS HI or tied to VCC to disable. The module provides the necessary bias and modulation control to maintain the extinction ratio at better than 8.2 dB and the waveform is compliant with SONET/SDH Eyemask standard G.957. The laser bias control loop compensates for temperature induced variations in laser performance. The bias current monitor indicates the amount of dc current supplied to the laser. (This is approximately the laser threshold current). The rear facet monitor is a signal proportional to the laser output power. This can be used as part of a HI/LO light alarm. In the absence of data the laser will emit a mean optical power within the specified limits. The extinction ratio and duty cycle distortion are specified assuring a 50% duty cycle at the correct data rate. 4 Performance Specifications Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parameter in isolation, all other parameters having values within the recommended operating conditions. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time. Exposure to the absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Supply Voltage Operating Case Temperature XMT5370A155 XMT5370B155 Storage Temperature Fiber Tensile Strength Fiber Bend Radius Lead Soldering (Temperature/Time) Minimum -40 0 -40 10 32 - Nominal - Maximum 7 +85 +70 +85 +260/10 Units V C C C N/10s mm C/Sec Notes 1 - Characteristics Parameter Center Wavelength Spectral Width (RMS) Average Output Power Extinction Ratio Bias Monitor Rear Facet Monitor Output Supply Voltage Supply Current Tx Disable Output Waveform Minimum 1261 -15 8.2 5 4.75 VCC -3.2 Nominal Maximum Units 1360 nm 4 nm -10 -8 dBm dB 0.1 mA/mV 50 mV 5.0 5.5 V 70 130 mA VCC V SONET/SDH Eyemask Compliant G.957 Notes 2 2 3 4 5 6 7 - Notes: 1. In a coaxial direction with fiber feed through. 2. Over operating temperature range. A narrower operating temperature range will result in a smaller center wavelength spread. Contact Agilent for details. 3. Other output power options are available. Contact Agilent for details. 4. Common mode signal VEE + 3.5 V nominal. 5. Common mode signal VEE + 1.2 V nominal. 6. With VEE connected to -5 V, VCC must be at 0 V. With VCC at +5 V, VEE must be at 0 V. 7. End of life at Tmax. 5 Drawing Dimensions L 20 11 C 1 B A 10 D J H K oG F E Dimensions Minimum A 32.9 B 39.5 C 16.0 D E 2.6 F OG H 2.7 J K L 400 All dimensions in mm Nominal 40 2.54 0.46 10.16 - Maximum 33.2 40.5 16.3 9.27 2.95 3.2 4.64 1220 Ordering Information XMT5370X155XX Connector: FP = FC/PC Polish ST = ST(R) SC = SC Temperature Option: A = -40C to +85C B = 0C to +70C Model Name: XMT5370 Allowable part numbers: XMT5370A155-FP XMT5370A155-ST XMT5370A155-SC XMT5370B155-FP XMT5370B155-ST XMT5370B155-SC Handling Precautions 1. 2. Normal handling precautions for electrostatic sensitive devices should be taken. Semiconductor lasers can be damaged by overloading or by current surges. Appropriate transient protection should be taken. This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture Class 1 Laser Product: Date of Manufacture: Agilent Technologies Inc., Whitehouse Road, Ipswich, England www.semiconductor.agilent.com Data subject to change. Copyright (c) 2000 Agilent Technologies, Inc. Obsoletes : 5966-0460E (9/97) 5968-3612E (11/99) ST(R) is a Registered Trademark of AT&T. |
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