HFCT-5912E

Small Form Factor MT-RJ Fiber Optic Transceivers for Gigabit Ethernet Technical Data HFBR-5912E, 850 nm VCSEL HFCT-5912E, 1300 nm FP Laser • High Speed Interface for File Servers • High Performance Desktops Features • Compliant with Specifications for IEEE 802.3z/ Gigabit Ethernet • Multisourced 2 x 5 Package Style with Integral MT-RJ Connector • Performance HFBR-5912E (1000 Base-SX) – 220 m Links in 62.5/125 µm MMF 160 MHz*km Cables – 275 m Links in 62.5/125 µm MMF 200 MHz*km Cables – 500 m Links in 50/125 µm MMF 400 MHz*km Cables – 550 m Links in 50/125 µm MMF 500 MHz*km Cables HFCT-5912E (1000 Base-LX) – 550 m Links in 62.5/125 µm MMF Cables – 10 km Links in 8/125 µm SMF Cables • IEC 60825-1 Class 1/CDRH Class 1 Laser Eye Safe • Single +3.3 V Power Supply Operation with PECL Logic I/O Interfaces, TTL Signal Detect and Transmit Disable • Wave Solder and Aqueous Wash Process Compatible Related Products • Physical Layer ICs Available for Optical or Copper Interface (HDMP-1636A/ 1646A) • Quad SERDES IC Available for High Density Interfaces (HDMP-1680) • 1x9 Fiber Optic Transceivers for Gigabit Ethernet (HFBR/HFCT-53D5) • Gigabit Interface Converters (GBIC) for Gigabit Ethernet SX – HFBR-5601 LX – HFCT-5611 Description The HFBR/HFCT-5912E transceiver from Agilent allows the system designer to implement a range of solutions for multimode and single mode Gigabit Ethernet applications. The transceivers are configured in the new multisourced industry standard 2 x 5 dual-in-line package with an integral MT-RJ fiber connector. Transmitter Section The transmitter section of the HFBR-5912E consists of an 850 nm Vertical Cavity Surface Emitting Laser (VCSEL) in an optical subassembly (OSA), which mates to the fiber cable. The HFCT-5912E incorporates a 1300 nm Fabry-Perot (FP) Laser designed to meet the Gigabit Ethernet LX specification. The OSA is driven by a custom silicon bipolar IC which accepts differential PECL logic signals (ECL referenced to a +3.3 V supply) and provides bias and modulation control for the laser. Receiver Section The receiver of the HFBR-5912E includes a GaAs PIN photodiode mounted together with a custom, silicon bipolar transimpedance preamplifier IC in an OSA. This OSA is mated to a custom silicon bipolar circuit that provides postamplification and quantization. The HFCT-5912E utilizes an InP PIN photodiode in a similar configuration. The post-amplifier also includes a Signal Detect circuit which provides a TTL logic-high output upon detection of an optical signal. Applications • Switch to Switch Interface • Switched Backbone Applications 2 APPLICATION SUPPORT Package and Handling Instructions Flammability The HFBR/HFCT-5912E transceiver housing consists of high strength, heat resistant, chemically resistant, and UL 94 V-0 flame retardant plastic and metal packaging. Recommended Solder and Wash Process The HFBR/HFCT-5912E is compatible with industrystandard wave or hand solder processes. Process plug This transceiver is supplied with a process plug for protection of the optical port within the MT-RJ connector receptacle. This process plug prevents contamination during wave solder and aqueous rinse as well as during handling, shipping and storage. It is made of a hightemperature, molded sealing material that can withstand +80°C and a rinse pressure of 110 lbs per square inch. Due to the differences in the multimode and single mode connector construction, the HFBR-5912E and HFCT-5912E process plugs are different and not interchangeable. The multimode port plug is black and the single mode variant is a blue color. Recommended Solder fluxes Solder fluxes used with the HFBR/HFCT-5912E should be water-soluble, organic fluxes. Recommended solder fluxes include Lonco 3355-11 from London Chemical West, Inc. of Burbank, CA, and 100 Flux from Alpha-Metals of Jersey City, NJ. Recommended Cleaning/ Degreasing Chemicals Alcohols: methyl, isopropyl, isobutyl. Aliphatics: hexane, heptane Other: naphtha. Do not use partially halogenated hydrocarbons such as 1,1.1 trichloroethane, ketones such as MEK, acetone, chloroform, ethyl acetate, methylene dichloride, phenol, methylene chloride, or N-methylpyrolldone. Also, Agilent does not recommend the use of cleaners that use halogenated hydrocarbons because of their potential environmental harm. receptacle is exposed to the outside of the equipment chassis it may be subject to whatever system-level ESD test criteria that the equipment is intended to meet. The transceiver performance is more robust than typical industry equipment requirements of today. Electromagnetic Interference (EMI) Most equipment designs utilizing these high-speed transceivers from Agilent will be required to meet the requirements of FCC in the United States, CENELEC EN55022 (CISPR 22) in Europe and VCCI in Japan. Refer to EMI section (page 5) for more details. Immunity Equipment utilizing these transceivers will be subject to radio-frequency electromagnetic fields in some environments. These transceivers have good immunity to such fields due to their shielded design. Eye Safety These laser-based transceivers are classified as AEL Class I (U.S. 21 CFR(J) and AEL Class 1 per EN 60825-1 (+A11). They are eye safe when used within the data sheet limits per CDRH. They are also eye safe under normal operating conditions and under all reasonably foreseeable single fault conditions per EN60825-1. Agilent has tested the transceiver design for compliance with the requirements listed below under normal operating conditions and under single fault conditions where applicable. TUV Rheinland has granted certification to these transceivers for laser eye safety and use in EN 60950 and EN 60825-2 applications. Their performance enables the transceivers to be used without concern for eye safety up to 5.0 V transmitter VCC. Regulatory Compliance (See the Regulatory Compliance Table for transceiver performance) The overall equipment design will determine the certification level. The transceiver performance is offered as a figure of merit to assist the designer in considering their use in equipment designs. Electrostatic Discharge (ESD) There are two design cases in which immunity to ESD damage is important. The first case is during handling of the transceiver prior to mounting it on the circuit board. It is important to use normal ESD handling precautions for ESD sensitive devices. These precautions include using grounded wrist straps, work benches, and floor mats in ESD controlled areas. The transceiver performance has been shown to provide adequate performance in typical industry production environments. The second case to consider is static discharges to the exterior of the equipment chassis containing the transceiver parts. To the extent that the MT-RJ connector 3 CAUTION: There are no user serviceable parts nor any maintenance required for the HFBR/HFCT-5912E. All adjustments are made at the factory before shipment to our customers. Tampering with or modifying the performance of the HFBR/HFCT-5912E will result in voided product warranty. It may also result in improper operation of the HFBR/HFCT-5912E circuitry, and possible overstress of the laser source. Device degradation or product failure may result. Connection of the HFBR/HFCT5912E to a non-approved optical source, operating above the recommended absolute maximum conditions or operating the HFBR/HFCT-5912E in a manner inconsistent with its design and function may result in hazardous radiation exposure and may be considered an act of modifying or manufacturing a laser product. The person(s) performing such an act is required by law to recertify and reidentify the laser product under the provisions of U.S. 21 CFR (Subchapter J). Optical Power Budget and Link Penalties The worst-case Optical Power Budget (OPB) in dB for a fiberoptic link is determined by the difference between the minimum transmitter output optical power (dBm avg) and the minimum receiver sensitivity (dBm avg). This OPB provides the necessary optical signal range to establish a working fiber-optic link. The OPB is allocated for the fiberoptic cable length and the corresponding link penalties. For proper link performance, all penalties that affect the link performance must be accounted for within the link optical power budget. The Gigabit Ethernet IEEE 802.3z standard identifies, and has modeled, the contributions of these OPB penalties to establish the link length requirements for 9/125 µm single mode and 50/125 µm and 62.5/125 µm multimode fiber usage. Refer to the IEEE 802.3z standard and its supplemental documents that develop the model, empirical results and final specifications. Regulatory Compliance Feature Electrostatic Discharge (ESD) to the Electrical Pins Electrostatic Discharge (ESD) to the MT-RJ Receptacle Electromagnetic Interference (EMI) Test Method MIL-STD-883C Method 3015.4 Variation of IEC 801-2 Performance Class 1 (>1500 V). Immunity FCC Class B CENELEC EN55022 Class B (CISPR 22A) VCCI Class I Variation of IEC 801-3 Typically withstand at least 15 kV without damage when the MT-RJ connector receptacle is contacted by a Human Body Model probe. Margins are dependent on customer board and chassis designs. Laser Eye Safety and Equipment Type Testing US 21 CFR, Subchapter J per Paragraphs 1002.10 and 1002.12 EN 60825-1: 1994 +A11 EN 60825-2: 1994 EN 60950: 1992+A1+A2+A3 Typically show no measurable effect from a 10 V/m field swept from 27 to 1000 MHz applied to the transceiver without a chassis enclosure. AEL Class I, FDA/CDRH HFBR-5912E Accession # 9720151-09 HFCT-5912E Accession # 9521220-20 AEL Class 1, TUV Rheinland of North America HFBR-5912E: Certificate # E9971083.01 HFCT-5912E: Certificate # 933/510817/05 Protection Class III UL File # E173874 Component Recognition Underwriters Laboratories and Canadian Standards Association Joint Component Recognition for Information Technology Equipment Including Electrical Business Equipment. 4 10 km Link Support As well as complying with the LX 5 km standard, the HFCT-5912E specification provides additional margin allowing for a 10 km Gigabit Ethernet link on single mode fiber. This is accomplished by limiting the spectral width and center wavelength range of the transmitter while increasing the output optical power and improving sensitivity. All other LX cable plant recommendations should be followed. As for the receiver section, it is internally ac-coupled between the preamplifier and the postamplifier stages. The actual Data and Data-bar outputs of the postamplifier are dc-coupled to their respective output pins (pins 4, 5). Signal Detect is a single-ended, +3.3 V TTL output signal that is dc-coupled to pin 3 of the module. Signal Detect should not be ac-coupled externally to the follow-on circuits because of its infrequent state changes. Caution should be taken to account for the proper interconnection between the supporting Physical Layer integrated circuits and this HFBR/HFCT-5912E transceiver. Figure 3 illustrates a recommended interface circuit for interconnecting to a +3.3 V dc PECL fiber-optic transceiver. for signal return current. This recommendation is in keeping with good high frequency board layout practices. The HFBR/HFCT-5912E is designed to cope with the electrically noisy environment inside the chassis box of Gigabit data communication systems. To minimize the impact of conducted and radiated noise upon receiver performance the metal cover at the rear of the HFBR/HFCT-5912E should be connected to the host system’s circuit common ground plane. To maximize the shielding effectiveness and minimize the radiated emissions that escape from the host system’s chassis box the metal shield that covers the MT-RJ receptacle should make electrical contact with the aperture required for the optical connector. The metal cover at the rear of the fiber-optic module is dielectrically isolated from the metal shield that covers the MT-RJ receptacle to avoid conflicts between circuit and chassis common. Package footprint and front panel considerations The Agilent transceiver complies with the circuit board “Common Transceiver Footprint” hole pattern defined in the original multisource announcement which defined the 2 x 5 package style. This drawing is reproduced in Figure 5 with the addition of ANSI Y14.5M compliant dimensioning to be used as a guide in the mechanical layout of your circuit board. Figure 6 shows the front panel dimensions associated with such a layout. Data Line Interconnections Agilent’s HFBR/HFCT-5912E fiber-optic transceiver is designed to couple to +3.3 V PECL signals. In order to reduce the number of passive components required on the customer’s board, Agilent has included the functionality of the external transmitter bias resistors and coupling capacitors within the fiber optic module. The transceiver is compatible with a “dc-coupled” configuration and Figure 3 depicts the circuit options. Additionally, there is an internal, 50 Ohm termination resistance within the transmitter input section. The transmitter driver circuit regulates the output optical power. The regulated light output will maintain a constant output optical power provided the data pattern is reasonably balanced in duty factor. If the data duty factor has long, continuous state times (low or high data duty factor), then the output optical power will gradually change its average output optical power level to its preset value. Per the multisource agreement, the HFBR/HFCT-5912E feature a transmit disable function which is a single-ended +3.3 V TTL input signal dc-coupled to pin 8. Electrical and Mechanical Interface Recommended Circuit Figure 3 shows the recommended interface for deploying the Agilent transceiver in a +3.3 V system. Also present are power supply filtering arrangements which comply with the recommendations of the small form factor multisource agreement. This configuration ensures noise rejection compatibility between transceivers from various vendors. Power Supply Filtering and Ground Planes It is important to exercise care in circuit board layout to achieve optimum performance from these transceivers. Figure 3 shows the recommended power supply filter circuit for the SFF transceiver. It is further recommended that a contiguous ground plane be provided in the circuit board directly under the transceiver to provide a low inductance ground 5 Eye Safety Circuit For an optical transmitter device to be eye-safe in the event of a single fault failure, the transmitter must either maintain eye-safe operation or be disabled. In the HFBR-5912E there are three key elements to the laser driver safety circuitry: a monitor diode, a window detector circuit, and direct control of the laser bias. The window detection circuit monitors the average optical power using the monitor diode. If a fault occurs such that the transmitter dc regulation circuit cannot maintain the preset bias conditions for the laser emitter within ± 20%, the transmitter will automatically be disabled. Once this has occurred, an electrical power reset or toggling the transmit disable will allow an attempted turn-on of the transmitter. If fault remains the transmitter will stay disabled. The HFCT-5912E utilizes an optical subassembly consisting of a short piece of single mode fiber along with a current limiting circuit to guarantee eye-safety. It is intrinsically eye safe and does not require shut down circuitry. indicating a working link is functional when receiving encoded 8B/10B characters. The Signal Detect does not detect receiver data error or error-rate. Data errors can be determined by signal processing offered by upstream PHY ICs. Electromagnetic Interference (EMI) One of a circuit board designer’s foremost concerns is the control of electromagnetic emissions from electronic equipment. Success in controlling generated Electromagnetic Interference (EMI) enables the designer to pass a governmental agency’s EMI regulatory standard and more importantly, it reduces the possibility of interference to neighboring equipment. Agilent has designed the HFBR/HFCT5912E to provide excellent EMI performance. The EMI performance of a chassis is dependent on physical design and features which help improve EMI suppression. Agilent encourages using standard RF suppression practices and avoiding poorly EMI-sealed enclosures. Radiated Emissions for the HFBR-5912E and HFCT-5912E have been tested successfully in several environments. While this number is important for system designers in terms of emissions levels inside a system, Agilent recognizes that the performance of most interest to our customers is the emissions levels, which could be expected to radiate to the outside world from inside a typical system. In their application, SFF transceivers are intended for use inside an enclosed system, protruding through the specified panel opening at the specified protrusion depth. Along with the system advantage of high port density comes the increase in the number of apertures. Careful attention must be paid to the locations of highspeed clocks or gigabit circuitry with respect to these apertures. While experimental measurements and experiences do not indicate any specific transceiver emissions issues, Agilent recognizes that the transceiver aperture is often a weak link in system enclosure integrity and has designed the modules to minimize emissions and if necessary, contain the internal system emissions by shielding the aperture. To that end, Agilent’s gigabit MT-RJ transceivers (HFCT-5912E and HFBR-5912E) have nose shields which provide a convenient chassis connection to the nose of the transceiver. This nose shield improves system EMI performance by closing off the MT-RJ aperture. Localized shielding is also improved by tying the four metal housing package grounding tabs to signal ground on the PCB. Though not obvious by inspection, the nose shield and metal housing are electrically separated for customers who do not wish to directly tie chassis and signal grounds together. The recommended transceiver position, PCB layout and panel opening for both HFBR-5912E and HFCT-5912E are the same, making them mechanically dropin compatible. Figure 6 shows the recommended positioning of the transceivers with respect to the PCB and faceplate. Signal Detect The Signal Detect circuit provides a TTL low output signal when the optical link is broken or when the transmitter is OFF as defined by the Gigabit Ethernet specification IEEE 802.3z, Table 38.1. The Signal Detect threshold is set to transition from a high to low state between the minimum receiver input optional power and -30 dBm avg. input optical power indicating a definite optical fault (e.g. unplugged connector for the receiver or transmitter, broken fiber, or failed far-end transmitter or data source). A Signal Detect 6 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 Storage Temperature Supply Voltage Received Data Output Current Relative Humidity TTL Transmit Disable Input Current - Low TTL Transmit Disable Input Current - High TTL Signal Detect Output Current - Low TTL Signal Detect Output Current - High Symbol TS VCC ID RH IILMAX IIHMAX IOLMAX IOHMAX Min. -40 -0.5 5 -3.0 -5.0 Typ. Max. +85 5.0 30 95 3.0 4.0 Unit °C V mA % mA mA mA mA Reference 1 Recommended Operating Conditions Parameter Ambient Operating Temperature Case Temperature Supply Voltage Power Supply Rejection Transmitter Differential Input Voltage Received Data Output Load TTL Signal Detect Output Current TTL Signal Detect Output Current Transmit Disable Input Voltage - Low Transmit Disable Input Voltage - High Transmit Disable Assert Time Transmit Disable Deassert Time TTL Transmit Disable Input Current - Low TTL Transmit Disable Input Current - High Symbol TA TC VCC PSR VD RDL IOL IOH VIL VIH TASSERT TDEASSERT IIL IIH Min. 0 0 3.14 0.4 50 1.0 -400 VCC -1.3 0.8 VCC 10 1.0 400 Typ. Max. +70 +80 3.47 1.6 Unit °C °C V mVP-P V Reference 2 3 4 100 W -1.0 mA µA V V µs ms mA µA 5 6 Process Compatibility Parameter Hand Lead Soldering Temperature/Time Wave Soldering and Aqueous Wash Symbol TSOLD/tSOLD TSOLD/tSOLD Min. Typ. Max. +260/10 +260/10 Unit °C/sec. °C/sec. Reference 7 Notes: 1. The transceiver is Class 1 eye safe up to VCC = 5.0 V. 2. Case temperature measurement referenced to the metal housing. 3. Tested with a 100 mVP-P sinusoidal signal in the frequency range from 10 Hz to 2 MHz on the VCC supply with the recommended power supply filter (with C8) in place. Typically less than a 1 dB change in sensitivity is experienced. 4. To VCC -2 V. 5. Time delay from Transmit Disable Assertion to laser shutdown. 6. Time delay from Transmit Disable Deassertion to laser startup. 7. Aqueous wash pressure