Advance Information OptobusI Multichannel Optical Data Transceiver

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Advance Information OptobusI Multichannel Optical Data Transceiver

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Advance Information OptobusI Multichannel Optical Data Transceiver
Optobus module 10-bit wide bidirectional data transceiver intended point-to-point communication applications requiring 4GBit/sec aggregate (400MBit/s/channel NRZ) data transfer each direction. Optobus link consists identical transceiver modules connectorized 20-wide fiber ribbon cable. Figure page contains logic block diagram one-half Optobus link (i.e., direction transmit receive).
MC94DL0400CH
Features Distance: meters Supports Bursty Data Small Form Factor, profile Fully differential PECL Compatible I/Os Resistant Protocol Independent Performance Upgradable Evaluation Available Applications Telecommunications Switching Massively Parallel Computers Workstation/Server Clusters Medical Imaging Visualization High-End Graphics/Serial Digital Video Distributed Sensor Arrays High Speed Instrumentation
SUFFIX Optobus transceiver module been designed using latest 101-LEAD PLASTIC MODULE advances Vertical Cavity Surface Emitting Laser (VCSEL) diodes, CASE 1222-01 optical photo detectors, connectorization technologies. Motorola combined these technologies with existing expertise design fabrication, multichip module packaging, cost manufacturing provide alternative copper cabling serial fiber optic interconnect. Optobus first family parallel optical link TABLE CONTENTS modules being developed Motorola address explosive bandwidth Introduction growth intrasystem communications; computing, tele- Product Description communications, data communications. Electrical Optical Characteristics Optobus transceiver module protocol independent Laser Safety Considerations intended utilized part physical layer data Fiber Ribbon Interconnect communication channel. link intended replace coaxial twisted Ordering Information pair interconnect reach meters. Each module Mechanical Characteristics divided into independent transmitter receiver subsystems channels totally asynchronous DC-coupled. System designers view ideal cable with extremely skew electrical losses. Optobus specifically designed handle bursty data which does have guaranteed `1'/`0' density. This important computing applications where data being transferred been encoded scrambled.
Optobus Guidecast trademarks Motorola, Inc. HI-PER Link trademark Alcoa Fujikura Limited. This document contains information product. Specifications information herein subject change without notice. 9/97
Motorola, Inc. 1997
MC94DL0400CH
MODULE TRANSMITTER Laser Diode Drivers Optical Fiber Trans Stage Gain Stages Decision Level Output Drivers MODULE RECEIVER
Figure Logic Block Diagram One-Half Optobus Link module requires single supply typical power consumption 115mW channel (single receive/transmit pair). Physically, module footprint 196-pin which pins used. Guidecastoptical interface units located edge module mate HI-PER Linkpush-pull connectors which based industry standard MT-style ferrule containing 10-wide 62.5/125µm grade index multimode fiber ribbon cable. module connector profile with maximum board height less than 9.25mm. Optobus used broad range applications including telecommunication switching, high bandwidth computer memory channels intra-system communica- tion links. part very attractive combining multiple independent serial data streams while significantly reducing amount board space needed optical connectors. synchronous applications, channels used clock. these features combine provide maximum user flexibility cost, power, compact, high performance transceiver. electromagnetic interference issues. Mechanically, Optobus provides clear advantages over existing copper solutions. Copper solutions heavier, bulkier, require massive connectors support cable. Figure shows major components Optobus module. 10-bit multimode fiber ribbons interface transmit receive subsections second module (not shown). Because core this multimode fiber (62.5 eight times larger than that single mode fiber, alignment tolerances relaxed from those traditional fiber optic solutions.
Guidecast Waveguide Opto- Electronic Array Housing Optical Fiber Cable
Product Description Optobus
intent developing this technology provide clean data transfer multi-gigabit speeds cost effectively. Optobus "clean data transfer" defined 1.5ns opening data sampling individual channel data rate 400Mb/sec. Motorola developing Optobus which pin-compatible, higher performance version Optobus which doubles bandwidth 800MBit/s channel. attributes include following:
Figure Optobus Exploded View module contains custom CMOS laser driver array which interfaces 10-channel array AlGaAs 850nm VCSEL laser diodes form transmitter subsystem. receiver side consists array GaAs photo detectors which directly connected bipolar transimpedance amplifier array. lasers photo detectors housed separate Guidecast optical interface units which optical waveguide couple light to/from fiber ribbon cable. Guidecast optical wave guide breakthrough enabling technologies Optobus These wave guides, manufactured standard molding techniques, provide convenient manufacturable optical interface transceiver module. module assembly cost kept
Current Mode Logic (CML), voltage differential
that provides easy interface. drive driven differential PECL I/Os. wide margin characteristic differential I/Os, also easy design into ASICs technology. style I/Os have been used years high performance systems support clock rates Gb/sec. selected minimize EMI, power consumption, simultaneous switching noise. link transparent, accept data stream (i.e., encoding required), each channel asynchronous (i.e., timing requirements stipulated). traditional advantages fiber available. These include light weight, compact size, freedom from
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restricting optical alignment tolerances mating lasers photo detectors corresponding wave guide. Another breakthrough enabling technology, shown Figure array Vertical Cavity Surface Emitting Lasers (VCSELs). VCSELs have several advantages over traditional lasers. First, edge-emitting lasers must cleaved packaged prior testing, whereas laser output VCSELs perpendicular substrate, allowing probe testing wafer level. Thus, lasers known good prior further assembly. Second, VCSELs modulated directly from data stream with fixed bias drive currents, simplifying both packaging electronics compared traditional lasers. Third, VCSEL output beam virtually circular, whereas edge-emitter output beam highly elliptical. This makes coupling simple does require lensing.
Figure Description transmitter subsystem consists VCSEL array, transmitter wave guide unit with optical outputs plus single 10-channel CMOS laser driver block diagram single channel shown Figure laser driver controls pre-bias well drive current which modulates VCSEL. differential inputs require minimum swing 0.25V support common mode range from VCC-1.05V VCC. This means that inputs directly driven differential PECL signal levels.
Circular Beam
VCSEL Array
Stripe Contact Elliptical Beam
Idrive
Ipre-bias
Conventional Laser
Facets (Mirrors)
VCSEL
Figure VCSEL versus Edge-Emitting Laser
Figure Transmitter Subsection
Open Collector Outputs Iout Iout
Although optoelectronic devices compound semiconductors, content Optobus module exclusively silicon: 12GHz bipolar receiver subsystem 0.8µm CMOS transmitter subsystem. Both technologies mature, fully qualified processes within Motorola. Finally, ICs, optical waveguide units bypass capacitors reside laminate multichip module (MCM-L) substrate. substrate carefully designed provide clean electrical environment eliminate interactions between receiver transmitter subsystems. Because tight integration separate components multichip module, user treat link black without knowledge internal features module. next several paragraphs describe electrical functionality Optobus order control amount electrical noise inside module ensure signal integrity customer's boards, module uses CML. design philosophy electrical I/Os that high output impedance differential output stage will terminated customer line receiver with pull resistors matched transmission line impedance shown Figure
Preamp
Decision Circuit
Figure Receiver Subsection single channel receiver subsystem shown Figure consists high speed photo detector conjunction with fixed decision threshold, coupled receiver output cell receiver subsystem always sinking current through differential pair while other complementary sits high impedance state. Hence, logic high state just pullup voltage logic Vp-0.005*Rp. system, this corresponds 250mV swings. While module today requires supply, easily interfaced system using rail pull voltage. Because this flexibility, compatible I/Os produced device technology.
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Table Descriptions
Symbol (x=0.9) (x=0.9) Description Differential inputs laser driver. These inputs accept differential PECL input signal. channel being used application, should tied should tied prevent oscillation which result input pair left open. logic "high" input turns "on" laser, while logic "low" turn laser "off".
Equivalent Circuit
400µA
400µA
400µA
Positive power supply transmitter laser diode array. Bypassing should placed close possible these pins should connected directly ground plane. Transmitter ground. This should tied directly ground plane. Open collector outputs from receiver. Both pins should terminated with same pullup resistor (Rp) value pullup supply (Vp). internal 2200 resistors provide known state outputs they left unconnected.
2200 2200
(x=0.9) (x=0.9)
Positive power supply receiver photo-detector array. Bypassing should placed close possible these pins should connected directly ground plane. module, this isolated from transmitter positive supply. Receiver ground. This should tied directly ground plane. module, this isolated from transmitter ground. connect. These pins must left open. They should used signal routing paths PCB.
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Electrical Optical Characteristics
MAXIMUM RATINGS*
Symbol (max) (max) Vout (max) Vdif (max) (max) Iout (max) TSTG Parameter Supply Voltage (Referenced GND) Input Signal (Any Pin) Output Signal (Any Pin) Differential Data Input Voltage |Din Din| Source/Sink Current Input Source/Sink Current Output Packaging Power Dissipation Still Air) Storage Temperature Range Value -0.5 +0.5 -0.5 +0.5 +0.5 ±0.3 +3/-10 Unit
Lead Temperature (Wave Solder Only) 250/1.5 °C/sec Maximum Ratings those values beyond which damage device occur. Functional operation should restricted Recommended Operating Conditions.
General Notes specifications assume following conditions, unless noted otherwise:
Ambient operating temperature 25°C, flow 500lfm rate/channel 400MBit/s Data pattern PRBS 223-1, channels switching independently error rate 10-14 Motorola Evaluation Board, device loopback mode Jitter Skew measured level waveform
LINK PERFORMANCE SPECIFICATIONS
Symbol Characteristic Supply Voltage Operating Ambient Temperature Range Allowable Rate Propagation Delay Channel Random Jitter Channel Deterministic Jitter Channel Total Jitter Skew Total Timing Inaccuracy 4.75 5.00 5.25 Unit MBit/s Excluding Cable Nominally 5ns/m Square Wave, Single Channel Switching Single Channel Switching Channels Switching Assumes Skew Contribution from Fiber Jitter Skew. Cable Skew Must Added this Parameter Timing Analysis Condition
Error Rate
10-14
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TRANSMITTER ELECTRICAL CHARACTERISTICS
Symbol VCMR Icct tr/tf Characteristic Differential Input Voltage Swing Input Common Mode Range Transmitter Supply Current Input Signal Rise/Fall Time Data Rate (NRZ) 0.25 VCC-1.05 2000 Unit MBit/s Note Note Note Note Condition
VCMR defined range within which high level (VIH) vary. level (VIL) must such that peak-to-peak voltage within specification Vpp. channels driven with 400MBit/s data stream, Figure typical performance versus data rate. Rise/Fall times measured using voltage points input waveform. Input electrical waveform must within rise fall time specifications.
RECEIVER ELECTRICAL CHARACTERISTICS
Symbol Iccr Vout tr/tf Characteristic Receiver Supply Current Output Current Differential Output Voltage Swing/Channel Pullup Voltage Output Rise/Fall Time 5.25 Unit Note Note Note Condition Note
Receiver current consumption function data rate. Assumes pullup resistor each differential outputs. Swing directly related resistor value. minimum pullup voltage assumes termination. larger pullup resistor used, then Vp(min)-Vout(max) must 2.7V. Rise/Fall times measured using voltage points waveform.
TRANSMITTER OPTICAL CHARACTERISTICS
Symbol Characteristic Output Optical Power High Output Optical Power Center Wavelength Spectral Width (FWHM) Optical Rise Time Optical Fall Time Relative Intensity Noise -130 -5.0 0.85 -1.0 Unit nm-rms dB/Hz Note Note Condition Note Note Note
Measured meters 62.5µm/125µm (NA=0.275) graded index optical fiber using power meter test ferrule. data rate this measurement 400MBit/s with repeating 3-`1', 5-`0' pattern. Center Wavelength defined midpoint between levels optical spectrum laser diode. Measures with 400MHz square wave pattern, 20%-80% (80%-20%) optical detector/oscilloscope having bandwidth greater than 5GHz.
RECEIVER OPTICAL CHARACTERISTICS
Symbol Psat Pmin Characteristic Data Rate (NRZ) Maximum Received Input Power Minimum Received Optical Input Power Operating Wavelength -13.5 -1.0 Unit MBit/s Condition
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Current Drain (mA)
5.25V 5.00V 4.75V
Data Rate (MBit/s NRZ)
Figure Typical Optobus Transmitter Current Drain Over Supply Data Rate
Figure Typical Optobus Output Electrical (Single Channel, PRBS with 223-1 Data Pattern, 400MBit/s)
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Interfacing Optobus
Optobus outputs operate with rise times several hundred picoseconds which means that signal bandwidth approaches 1Ghz. This requires that controlled impedance traces (stripline microstrip), proper layout, inductance power supply decoupling techniques should employed design printed circuit board (PCB). Differential signal pairs should routed together closely match lengths, thus minimizing pulse width changes. Groups input output traces should have delays matched control skew between channels. standard FR4/microstrip design, 1.75cm difference between trace lengths results approximately skew which directly impacts timing budget. input circuitry been designed with extended input operating range interface directly PECL. Standard PECL output termination methods should employed. outputs open collector generate nominal current signal. transmission line termination resistor connected pullup voltage, which most cases, upper voltage rail. With pull-up resistors outputs nominally switch between 4.75V level 5.0V high level. This allows devices drive directly into PECL devices which have extended common mode range inputs such MC100E416. standard PECL input specifications, diode added each output pair shift swing within input range normal PECL. Figure illustrates recommended Optobus standard PECL interface. environment, minimum swing 200mVpp outputs which adequate most differential PECL interface circuitry. larger swing required, transmission line termination redesigned which increases minimum swing 300mVpp. additional information PECL terminations, please consult Motorola Application Note AN1406 "Designing with PECL (ECL +5.0V)". Optobus been specified applications, addition, used traditional (negative -5V) applications shifting supply levels downward negative rail operation. this case, lowest potential, -5V, highest potential,
PECL Interface Optobus
Unit
Figure Interfacing Optobus Outputs PECL
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Laser Safety
Optobus Laser Safety Compliance Information
transceiver module contains laser diode output ports. Optobus product certified Motorola Class Laser product requirements DHHS Federal Product Performance Standard Laser Products, Subchapter Part 1040.10. Class levels laser radiation considered hazardous. However, good general practice, never intentionally look into active port open cable connected transmitter ports opposite end. laser classification based Volt (±5%) supply module. laser driver voltage temperature compensated provide constant maximum optical output power. Failure provide power module within Motorola upper voltage limit specification result excessive maximum optical output power, constitutes "modification" product. Modification product construed "manufacturing" requires manufacturer performs such modification recertify reidentify product 1040.10 North America Alcoa Fujikura Limited P.O. 3127 Spartanburg, South Carolina 29304 Phone: 864-433-0333 800-235-3423, Ext. Fax: 800-866-3862 Fujikura Europe Limited Attn: Graham Harper Barwell Business Park Leatherhead Rd., Chessington Surry 2NY, England Phone: 0181-240-2000 Fax: 0181-240-2010 Fujikura Japan Attn: Naoki Hagino Telecommunication Cable Accessory Division 1-5-1, Kiba, Koto-ku, Tokyo Phone: 81-3-5606-1207 Fax: 81-3-5606-1536 from AFL. Below contact list AFL. Complete optical mechanical information available from AFL.
Europe
Japan
Fiber Ribbon Interconnect
addition designing Optobus transceiver module, Motorola develop optical fiber connector ribbon cable identify supply source connectorized fiber ribbon cable. connector reliable, robust, compact, cost effective, simple-to-use, built around standard FDDI grade 62.5µm/125µm graded index multimode ribbon cable. Below list some fiber specifications.
Assembly Information
Optobus housed Grid Array format. form-factor allows wave soldered into part assembly process. wave solder should 250° less with time less than cycles maximum). format materials utilized multichip module assembly, Optobus cannot used reflow soldering process. reflow soldering preferred assembly process, Motorola recommends that sockets used board Optobus module installed after solder process. sockets either press soldered into there minimal increase standoff height. This added benefit making Optobus module replaceable also aids testability board because connections tested board tester.
Fiber Ribbon Specifications
Bellcore GR-409-Core, Issue Compliant Maximum Attenuation Minimum Bandwidth (3dB) Maximum Skew 3.5dB/km 850nm 160MHz/km 850nm <6ps/m
Note: skew grade <2ps/m available solution this adopt industry standard MT-style ferrule which developed NTT. ferrule rigid mechanical fixture within connector body which holds fiber place provides alignment necessary precisely mate fiber. develop connector body supply connectorized ribbon cable, Motorola selected Alcoa Fujikura Limited (AFL), leading optical cable supplier co-develop HI-PER Link push-pull connector. connector/module housing polarized with mechanical well visual guide simplify installation. HI-PER Link connector available licensing other fiber ribbon suppliers. preferred optical cable manufacturer will supply Optobus customers with connectorized HI-PER Link ribbon cable customized specific lengths that application requires. Standard lengths also available
Evaluation
Motorola offers evaluation (EB0400CH) characterizing performance Optobus. includes test board, Optobus module, meter fiber ribbon cable. This allows characterization module loop back mode where transmit signals routed back receive side module. evaluation board fully populated with connectors requires assembly. been designed used standard environment. evaluation ordered through your local Motorola sales office authorized Motorola distributor.
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Ordering Shipping Information Device Nomenclature
94DL WWWW
Motorola Circuit Identifier Prototype Non-Reliability Qualified Full Production Release Data Link Identifier Operating Speed 0400 400MBit/s (Optobus 0800 800MBit/s (Optobus
Package Type 101-Lead Plastic Module Connector Identifier HI-PER Link Electrical Interface Level Identifier
Production Optobus modules will packaged JEDEC Level packaging consists sealed vapor barrier packaged with dessicant guarantee very relative humidity.
Site
updates information, please consult Optobus web-site which located
Mechanical Characteristics
optical connector housing module HI-PER link connector have visual indicator arrows show proper mating direction. addition, there mechanical stops within housing avoid improper mating. When HI-PER link connector engaged module, latches connector will close onto stops housing. connector should pushed past this point until stops against housing. This ensures that ferrule butts against face Guidecast inside connector housing. Since ferrule spring loaded, connector body will then move back slightly. fully engaged connection illustrated Figure
Connector
Waveguide Waveguide
Fiber Ribbon
Fiber Ribbon
Connector
Figure Channel Number Identification (Top View Module)
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37.75mm
39.5mm 16.0mm
35.2mm
14.0mm
Figure Connector Package Diagram (All dimensions maximum)
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OPTICAL PORT
OPTICAL PORT
Figure Optobus Electrical Pinout (Bottom View) Notes: User Connect" These pins must left floating.
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Optobus Descriptions
Location
Description Receiver Output Receiver Output Receiver Receiver Receiver Receiver Receiver Receiver Receiver Receiver Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver
Location
Description Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver Output Receiver
Location
Description Output Receiver Output Receiver Output Transmitter Data Transmitter Data Transmitter Data Data Transmitter Data Transmitter Data Transmitter Transmitter Data Transmitter Data Transmitter
Location
Description Data Data Transmitter Data Transmitter Data Transmitter Transmitter Data Transmitter Data Transmitter Data Data Transmitter Data Transmitter Data Transmitter Data Transmitter Data Transmitter Transmitter Transmitter Transmitter
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OUTLINE DIMENSIONS
SUFFIX PLASTIC MODULE CASE 1222-01 ISSUE
MILLIMETERS 36.950 37.750 38.700 39.500 8.250 9.250 0.430 0.530 17.200 18.000 25.000 29.000 2.540 0.900 1.500 2.000 2.900 4.600 5.400 15.500 16.500 7.050 7.200 1.500 1.650 6.500 6.700 2.750 3.050 0.870 1.050 1.100 1.300 46.215 47.485 NOTES: CONTROLLING DIMENSION: MILLIMETER. DIMENSIONS TOLERANCING ASME Y14.5M, 1994.
101X
0.762 0.254
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters which provided Motorola data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer.
Mfax trademark Motorola, Inc. reach EUROPE Locations Listed: Motorola Literature Distribution; P.O. 5405, Denver, Colorado 80217. 1-303-675-2140 1-800-441-2447 Customer Focus Center: 1-800-521-6274 MfaxTM: RMFAX0@email.sps.mot.com TOUCHTONE 1-602-244-6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Ping Industrial Park, Motorola Back System Canada ONLY 1-800-774-1848 Ting Road, N.T., Hong Kong. 852-26629298 http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. 81-3-5487-8488
MOTOROLA
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Advance Information OptobusI Multichannel Optical Data Transceiver

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