Agilent HFCT-5981ATL Single Mode Laser Transceiver at 1.3 Gb/s for Gigabit Ethernet and iSCSI applications Data Sheet Description The HFCT-5981ATL transceiver is a high performance, cost effective module for serial optical data communications applications operating at 1.3 Gb/s. This module is designed for single mode fiber and operates at a nominal wavelength of 1310 nm. It incorporates high performance, reliable, long wavelength optical devices and proven circuit technology to give long life and consistent service. The transmitter section incorporates a 1310 nm Fabry Perot (FP) laser. The transmitter has full IEC 825 and CDRH Class 1 eye safety. The receiver section uses an MOVPE grown planar SEDET PIN photo detector for low dark current and excellent responsivity. The transceiver is supplied in the industry standard 2 x 5 DIP style package with the LC fiber connector interface and is footprint compatible with SFF Multi Source Agreement (MSA). Features • 10 km Links with 9/125 µm single mode fiber (SMF) • 550 m links in 62.5/125 µm multimode fiber (MMF) • Compliant to Gigabit Ethernet IEEE 802.3, 2000 Edition • Compliant to Small Form Factor • 2 x 5 package style with LC receptacle • Single +3.3 V power supply • Case operating temperature range: -10°C to +85°C • Manufactured in an ISO9002 certified facility • Fully Class 1 CDRH/IEC 825 compliant • Wave solder and aqueous wash process compatible Applications • Gigabit Ethernet 1000BASE-LX • 1.3 Gb/s proprietary links Functional Description Receiver Section Design The receiver section for the HFCT-5981ATL contains an InGaAs/InP photo detector and a pre-amplifier mounted in an optical subassembly. This optical subassembly is coupled to a post-amplifier/decision circuit on a circuit board. The design of the optical assembly is such that it provides better than 12 dB Optical Return Loss (ORL). Figure 1 also shows a filter function which limits the bandwidth of the pre-amp output signal. The filter is designed to bandlimit the preamp output noise and thus improve the receiver sensitivity. These components will reduce the sensitivity of the receiver as the signal bit rate is increased above 1.3 Gb/s. The post-amplifier is ac coupled to the pre-amplifier as illustrated in Figure 1. The coupling capacitors are capable of passing the Gigabit Ethernet test pattern at 1.3 Gb/s without significant distortion or performance penalty. If a lower signal rate, or a code which has significantly more low frequency content is used, sensitivity, jitter and pulse distortion could be degraded. Figure 1. Receiver Block Diagram 2 PECL OUTPUT BUFFER AMPLIFIER GND The Signal Detect Circuit The signal detect circuit works by sensing the peak level of the received signal and comparing this level to a reference. The SD output is low voltage TTL. DATA OUT FILTER TRANSIMPEDANCE PREAMPLIFIER Noise Immunity The receiver includes internal circuit components to filter power supply noise. However under some conditions of EMI and power supply noise, external power supply filtering may be necessary (see Application Section). SIGNAL DETECT CIRCUIT TTL OUTPUT BUFFER DATA OUT SD Functional Description Transmitter Section Design A schematic diagram for the transmitter is shown in Figure 2. The HFCT-5981ATL incorporates an FP laser and has been designed to be compliant with IEC 825 eye safety requirements under any single fault condition and CDRH under normal operating conditions. The optical output is controlled by a custom IC that detects the laser output via the monitor photodiode. This IC provides both dc and ac current drive to the laser to ensure correct modulation, eye diagram and extinction ratio over temperature, supply voltage and operating life. FP LASER DATA LASER MODULATOR DATA PECL INPUT LASER BIAS DRIVER LASER BIAS CONTROL Figure 2. Simplified Transmitter Schematic 3 PHOTODIODE (rear facet monitor) Package The overall package concept for the device consists of the following basic elements; two optical subassemblies, two electrical subassemblies and the housing as illustrated in the block diagram in Figure 3. The package outline drawing and pin out are shown in Figures 4 and 5. The details of this package outline and pin out are compliant with the multisource definition of the 2 x 5 DIP. The electrical subassemblies consist of high volume multilayer printed circuit boards on which the IC and various surface-mounted passive circuit elements are attached. The receiver electrical subassembly includes an internal shield for the electrical and optical subassembly to ensure high immunity to external EMI fields. The optical subassemblies are each attached to their respective transmit or receive electrical subassemblies. These two units are then placed within the outer housing of the transceiver. The outer housing is molded with nonconductive plastic in order to provide mechanical strength. The housing is then encased with a metal EMI protective shield. The case is signal ground and we recommend soldering the four ground tabs to host card signal ground. Each electrical subassembly PCB carries the signal pins that exit from the bottom of the transceiver. The solder posts are fastened into the molding of the device. This design provides the mechanical strength required to withstand the additional stresses on the transceiver resulting from the insertion force of fiber cable mating. Although the solder posts are not connected electrically to the transceiver, it is recommended that they are connected to the chassis ground. RX SUPPLY * DATA OUT PIN PHOTODIODE PREAMPLIFIER SUBASSEMBLY QUANTIZER IC DATA OUT RX GROUND SIGNAL DETECT LC RECEPTACLE TX GROUND DATA IN DATA IN Tx DISABLE LASER BIAS MONITORING LASER DRIVER AND CONTROL CIRCUIT LASER DIODE OUTPUT POWER MONITORING TX SUPPLY LASER OPTICAL SUBASSEMBLY CASE * NOSE CLIP PROVIDES CONNECTION TO CHASSIS GROUND FOR IMPROVED EMI PERFORMANCE Figure 3. Block Diagram 4 15.0 ± 0.2 (0.591 ± 0.008) 13.59 + 0 - 0.2 0.535 +0 -0.008 ( 13.59 (0.535) MAX ) TOP VIEW 48.2 (1.898) 6.25 (0.246) 10.8 ± 0.2 9.6 ± 0.2 (0.425 ± 0.008)(0.378 ±0.008) Ø 1.07 (0.042) 10.16 (0.4) 19.5 ±0.3 (0.768 ±0.012) FRONT VIEW 4.06 (0.16) MIN 1 (0.039) 9.8 (0.386) MAX 3.81 (0.15) MIN 0.25 10 x 0.5 (0.01) (0.02) 1.78 (0.07) 1 (0.039) BACK VIEW SIDE VIEW 10 x 0.25 (PIN THICKNESS) (0.01) NOTE: END OF PINS CHAMFERED BOTTOM VIEW TCASE REFERENCE POINT DIMENSIONS IN MILLIMETERS (INCHES) DIMENSIONS SHOWN ARE NOMINAL. ALL DIMENSIONS MEET THE MAXIMUM PACKAGE OUTLINE DRAWING IN THE SFF MSA. Figure 4. HFCT-5981ATL Package Outline Drawing 5 Connection Diagram RX TX Mounting Studs/ Solder Posts Package Grounding Tabs Top View RECEIVER SIGNAL GROUND RECEIVER POWER SUPPLY SIGNAL DETECT RECEIVER DATA OUT BAR RECEIVER DATA OUT o o o o o 1 2 3 4 5 10 9 8 7 6 o o o o o TRANSMITTER DATA IN BAR TRANSMITTER DATA IN TRANSMITTER DISABLE TRANSMITTER SIGNAL GROUND TRANSMITTER POWER SUPPLY Figure 5. Pin Out Diagram (Top View) Pin Descriptions: Pin 1 Receiver Signal Ground VEE RX: Directly connect this pin to the receiver ground plane. Pin 4 Receiver Data Out Bar RD-: Output internally biased and AC coupled. Pin 9 Transmitter Data In TD+: Input internally terminated and AC coupled. Pin 2 Receiver Power Supply VCC RX: Provide +3.3 V dc via the recommended receiver power supply filter circuit. Locate the power supply filter circuit as close as possible to the VCC RX pin. Note: the filter circuit should not cause VCC to drop below minimum specification. Pin 5 Receiver Data Out RD+: Output internally biased and AC coupled. Pin 10 Transmitter Data In Bar TD-: Input internally terminated and AC coupled. Pin 6 Transmitter Power Supply VCC TX: Provide +3.3 V dc via the recommended transmitter power supply filter circuit. Locate the power supply filter circuit as close as possible to the VCC TX pin. Mounting Studs/Solder Posts The two mounting studs are provided for transceiver mechanical attachment to the circuit board. It is recommended that the holes in the circuit board be connected to chassis ground. Pin 7 Transmitter Signal Ground VEE TX: Directly connect this pin to the transmitter signal ground plane. Package Grounding Tabs Connect four package grounding tabs to signal ground. Pin 3 Signal Detect SD: Normal optical input levels to the receiver result in a logic “1” output. Low optical input levels to the receiver result in a logic “0” output. This Signal Detect output can be used to drive a LVTTL input on an upstream circuit, such as Signal Detect input or Loss of Signal-bar. 6 Pin 8 Transmitter Disable TDIS: Optional feature, connect this pin to +3.3 V TTL logic high “1” to disable module. To enable module connect to TTL logic low “0”. Application Information The Applications Engineering Group at Agilent is available to assist you with technical understanding and design tradeoffs associated with these transceivers. You can contact them through your Agilent sales representative. link. The OPB is allocated for the fiber optic 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 802.3 standard identifies, and has modeled, the contributions of these OPB penalties to establish the link length requirements for 62.5/125 µm and 50/125 µm multimode usage. In addition, single mode fiber with standard 1300 nm Fabry-Perot lasers have been modeled and specified. Refer to the IEEE 802.3 standard and its supplemental documents that develop the model, empirical results and specifications. The following information is provided to answer some of the most common questions about the use of the parts. Optical Power Budget and Link Penalties The worst-case Optical Power Budget (OPB) in dB for a fiber optic link is determined by the difference between the minimum transmitter output optical power (dBm avg) and the lowest receiver sensitivity (dBm avg). This OPB provides the necessary optical signal range to establish a working fiber optic Refer to 38.11.4 for specification of offset-launch modeconditioning patch cord required for MMF operation of HFCT-5981ATL. 10km Link Support As well as complying with the 1000Base-LX 5 km standard, the HFCT-5981ATL specification provides additional margin allowing for a 10 km link on a 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 1000Base-LX cable plant recommendations should be followed. Z = 50 W VCC (+3.3 V) TDIS (LVTTL) 130 W TD- Z = 50 W NOTE A 130 W VEE TX o VCC TX o o RD+ 6 o RD- TD+ o 7 o SD 8 o V CC RX RX TD- o TX 9 o VEE RX 10 TDIS o TD+ 1 2 3 4 5 VCC (+3.3 V) 1 µH C2 10 µF C3 10 µF VCC (+3.3 V) 1 µH RD+ C1 10 µF Z = 50 W 100 W NOTE B RD- Z = 50 W SD Note: C1 = C2 = C3 = 10 nF or 100 nF TD+, TD- INPUTS ARE INTERNALLY TERMINATED AND AC COUPLED. RD+, RD- OUTPUTS ARE INTERNALLY BIASED AND AC COUPLED. Note A: CIRCUIT ASSUMES OPEN EMITTER OUTPUT. Note B: CIRCUIT ASSUMES HIGH IMPENDANCE INTERNAL BIAS @ V CC - 1.3 V. Figure 6. Recommended Interface Circuit 7 LVTTL Electrical and Mechanical Interface Recommended Circuit Figure 6 shows the recommended interface for deploying the Agilent transceivers in a +3.3 V system. Data Line Interconnections Agilent’s HFCT-5981ATL fiber optic transceivers are designed to couple to +3.3 V PECL signals. 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 balanced in duty cycle. If the data duty cycle has long, continuous state times (low or high data duty cycle), then the output optical power will gradually change its average output optical power level to its preset value. 2 x Ø 2.29 MAX. 2 x Ø 1.4 ±0.1 (0.09) (0.055 ±0.004) The HFCT-5981ATL has a transmit disable function which is a single-ended +3.3 V TTL input which is dc-coupled to Pin 8. The receiver section is internally ac-coupled between the preamplifier and the post-amplifier stages. The Data and Data-bar outputs of the post-amplifier are internally biased and ac-coupled to their respective output pins (Pins 4, 5). Caution should be taken to account for the proper interconnection between the supporting Physical Layer integrated circuits and these transceivers. Figure 6 illustrates a recommended interface circuit for interconnecting to a +3.3 V dc PECL fiber optic transceiver. Signal Detect is a single-ended, +3.3 V TTL compatible 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. 17.8 (0.700) 2 x Ø 1.4 ±0.1 7.11 (0.055 ±0.004) (0.28) 3.56 (0.14) 4 x Ø 1.4 ±0.1 (0.055 ±0.004) 13.34 (0.525) 10.16 (0.4) 7.59 (0.299) 9.59 (0.378) 3 (0.118) 4 x 1.78 (0.07) 3 (0.118) 6 (0.236) 2 (0.079) 2 2 x Ø 2.29 (0.079) (0.09) 4.57 (0.18) 3.08 (0.121) 10 x Ø 0.81 ±0.1 (0.032 ±0.004) DIMENSIONS IN MILLIMETERS (INCHES) NOTES: 1. THIS FIGURE DESCRIBES THE RECOMMENDED CIRCUIT BOARD LAYOUT FOR THE SFF TRANSCEIVER. 2. THE HATCHED AREAS ARE KEEP-OUT AREAS RESERVED FOR HOUSING STANDOFFS. NO METAL TRACES OR GROUND CONNECTION IN KEEP-OUT AREAS. 3. 2 x 5 TRANSCEIVER MODULE REQUIRES 16 PCB HOLES (10 I/O PINS, 2 SOLDER POSTS AND 4 PACKAGE GROUNDING TABS). PACKAGE GROUNDING TABS SHOULD BE CONNECTED TO SIGNAL GROUND. 4. THE MOUNTING STUDS SHOULD BE SOLDERED TO CHASSIS GROUND FOR MECHANICAL INTEGRITY AND TO ENSURE FOOTPRINT COMPATIBILITY WITH OTHER SFF TRANSCEIVERS. 5. HOLES FOR HOUSING LEADS MUST BE TIED TO SIGNAL GROUND. Figure 7. Recommended Board Layout Hole Pattern 8 Power Supply Filtering and Ground Planes It is important to exercise care in circuit board layout to achieve optimum performance from these transceivers. Figure 6 shows the power supply circuit which complies with the Small Form Factor Multisource Agreement. It is further recommended that a continuous ground plane be provided in the circuit board directly under the transceiver to provide a low inductance ground for signal return current. This recommendation is in keeping with good high frequency board layout practices. Package footprint and front panel considerations The Agilent transceivers comply with the circuit board “Common Transceiver Footprint” hole pattern defined in the current multisource agreement which defined the 2 x 5 package style. This drawing is reproduced in Figure 7 with the addition of ANSI Y14.5M compliant dimensioning to be used as a guide in the mechanical layout of your circuit board. Figure 8 shows the front panel dimensions associated with such a layout. Eye Safety Circuit For an optical transmitter device to be eye-safe in the event of a single fault failure, the transmit-ter must either maintain eye-safe operation or be disabled. The HFCT-5981ATL is intrinsically eye safe and does not require shut down circuitry. Signal Detect The Signal Detect circuit provides a de-asserted output signal when the optical link is broken (or when the remote transmitter is OFF). The Signal Detect threshold is set to transition from a high to low 9 000 000 000 15.24 (0.6) 10.16 ± 0.1 (0.4 ± 0.004) TOP OF PCB 000 000 000 000 000 000 000000000 000000000 000000000 000000000 B B DETAIL A 15.24 (0.6) 1 (0.039) 000 000 000 0000000000000000000000000000 0000000000000000000000000000 14.22 ±0.1 (0.56 ±0.004) A SOLDER POSTS 000 0000000000 000000000000000000000000000 000 0000000000 000000000000000000000000000 000 15.75 MAX. 15.0 MIN. (0.62 MAX. 0.59 MIN.) SECTION B - B DIMENSIONS IN MILLIMETERS (INCHES) 1. 2. FIGURE DESCRIBES THE RECOMMENDED FRONT PANEL OPENING FOR A LC OR SG SFF TRANSCEIVER. SFF TRANSCEIVER PLACED AT 15.24 mm (0.6) MIN. SPACING. Figure 8. Recommended Panel Mounting state between the minimum receiver input optical 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). 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 HFCT-5981ATL to provide good 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. Agilent’s LC transceivers (HFCT5981ATL) have nose shields which provide a convenient chassis connection to the nose of the transceiver. This nose shield improves system EMI performance by effectively closing off the LC 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. Figure 8 shows the recommended positioning of the transceivers with respect to the PCB and faceplate. Package and Handling Instructions Flammability The HFCT-5981ATL transceiver housing consists of high strength, heat resistant and UL 94 V-0 flame retardant plastic and metal packaging. Recommended Solder and Wash Process The HFCT-5981ATL are compatible with industrystandard wave solder processes. Process plug This transceiver is supplied with a process plug for protection of the optical port within the LC 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 +85°C and a rinse pressure of 110 lbs per square inch. 10 Recommended Solder fluxes Solder fluxes used with the HFCT-5981ATL 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. LC SFF Cleaning Recommendations In the event of contamination of the optical ports, the recommended cleaning process is the use of forced nitrogen. If contamination is thought to have remained, the optical ports can be cleaned using a NTT international Cletop stick type (diam. 1.25mm) and HFE7100 cleaning fluid. Regulatory Compliance The Regulatory Compliance for transceiver performance is shown in Table 1. 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) The device has been tested to comply with MIL-STD-883 (Method 3015). 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. Electromagnetic Interference (EMI) Most equipment designs utilizing these high-speed transceivers from Agilent will be required to meet FCC regulations in the United States, CENELEC EN55022 (CISPR 22) in Europe and VCCI in Japan. Refer to EMI section (page 9) for more details. Immunity Transceivers will be subject to radio-frequency electromagnetic fields following the IEC 61000-4-3 test method. Table 1: Regulatory Compliance - Targeted Specification Feature Electrostatic Discharge (ESD) to the Electrical Pins Electrostatic Discharge (ESD) to the LC Receptacle Electromagnetic Interference (EMI) Eye Safety These laser-based transceivers are classified as AEL Class I (U.S. 21 CFR(J) and AEL Class 1 per IEC60825-1 (+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 IEC60825-1. Agilent has tested the transceiver design for compliance with the requirements listed below. These tests were conducted under normal operating conditions and single fault conditions where applicable. TUV Rheinland has granted certification to these transceivers for laser eye safety and use in IEC60825-2 applications. Their performance enables the transceivers to be used without concern for eye safety up to 3.6 V transmitter VCC. Test Method MIL-STD-883 Method 3015 Performance Class 2 (>2 kV). Variation of IEC 61000-4-2 Tested to 8 kV contact discharge. Margins are dependent on customer board and chassis designs. Immunity FCC Class B CENELEC EN55022 Class B (CISPR 22A) VCCI Class I Variation of IEC 61000-4-3 Laser Eye Safety and Equipment Type Testing FDA CDRH 21-CFR 1040 Class 1 Component Recognition IEC 60825-1 Amendment 2 2001 - 01 Underwriters Laboratories and Canadian Standards Association Joint Component Recognition for Information Technology Equipment Including Electrical Business Equipment. 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. Accession Number: HFCT-5981ATL ) 9521220-63 License Number: 11 HFCT-5981ATL ) 933/510219/01 UL File Number: E173874 CAUTION: There are no user serviceable parts nor any maintenance required for the HFCT-5981ATL. All adjustments are made at the factory before shipment to our customers. Tampering with or modifying the performance of the parts will result in voided product warranty. It may also result in improper operation of the circuitry, and possible overstress of the laser source. Device degradation or product failure may result. Connection of the devices to a non-approved optical source, operating above the recommended absolute maximum conditions or operating the HFCT-5981ATL 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 re-certify and re-identify the laser product under the provisions of U.S. 21 CFR (Subchapter J). 12 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 (non-operating) Relative Humidity Supply Voltage Input Voltage on any Pin Symbol TS Min -40 RH VCC VI -0.5 -0.5 Typ Max +85 Unit °C 85 3.6 VCC % V V Max +85 3.5 10 1.0 Unit °C V mVP-P W V V µs ms Max +260/10 Unit °C/sec. Notes 1 Recommended Operating Conditions Parameter Case Operating Temperature Supply Voltage Power Supply Noise Rejection Data Output Load Transmit Disable Input Voltage - Low Transmit Disable Input Voltage - High Transmit Disable Assert Time Transmit Disable Deassert Time Symbol TC VCC PSNR RDL TDIS TDIS TASSERT TDEASSERT Min -10 3.1 100 Symbol TSOLD/tSOLD Min Typ +25 3.3 50 0.6 2.2 Notes 2 3 4 Process Compatibility Parameter Wave Soldering and Aqueous Wash Typ Notes 5 Notes: 1. The transceiver is class 1 eye safe up to V CC = 3.6 V. 2. Tested with a sinusoidal signal in the frequency range from 10 Hz to 1 MHz on the VCC supply with the recommended power supply filter in place. Typically less than a 1 dB change in sensitivity is experienced. 3. Time delay from Transmit Disable Assertion to laser shutdown. 4. Time delay from Transmit Disable Deassertion to laser startup. 5. Aqueous wash pressure <110 psi. 13 Transmitter Electrical Characteristics TC = -10°C to +85°C, VCC = 3.1 V to 3.5 V Parameter Supply Current Transmitter Power Dissipation Data Input Voltage Swing (single-ended) Transmitter Differential Data Input Current - Low Transmitter Differential Data Input Current - High Symbol ICCT PDIST VIH - VIL Min IIL -350 Typ 52 172 250 Max 120 420 930 Unit mA mW mV Notes µA IIH 350 µA Max 140 490 930 0.40 0.40 0.6 Unit mA mW mV ns ns V V µs µs Receiver Electrical Characteristics TC = -10°C to +85°C, VCC = 3.1 V to 3.5 V Parameter Supply Current Receiver Power Dissipation Data Output Voltage Swing (single-ended) Data Output Rise Time Data Output Fall Time Signal Detect Output Voltage - Low Signal Detect Output Voltage - High Signal Detect Assert Time (OFF to ON) Signal Detect Deassert Time (ON to OFF) Symbol ICCRX PDISS VOH - VOL tr tf VOL VOH ASMAX ANSMAX Min 575 2.0 Notes: 1. These outputs are compatible with 10 k, 10 kH, and 100 k ECL and PECL inputs. 2. These are 20-80% values. 3. SD is LVTTL compatible. 14 Typ 102 336 100 100 Notes 1 2 2 3 3 Transmitter Optical Characteristics TC = -10°C to +85°C, VCC = 3.1 V to 3.5 V Parameter Output Optical Power 9 µm SMF 62.5 µm MMF 50 µm MMF Optical Extinction Ratio Center Wavelength Spectral Width - RMS Optical Rise/Fall Time Random Intensity Noise Contributed Total Jitter added at TP2 Coupled Power Ratio 62.5 µm MMF Coupled Power Ratio 50 µm MMF Symbol POUT POUT POUT ER Cl Min -9.5 -11.5 -11.5 9 1278 Typ 1.4 TRISE/FALL RIN12 TJ CPR CPR Max -3 -3 -3 1343 2.7 0.26 -120 227 28<CPR<40 12<CPR<20 Unit dBm dBm dBm dB nm nm ns dB/Hz ps Notes 1 8, Fig 10 8, Fig 10 2, 3, Fig 9 4 Receiver Optical Characteristics TC = -10°C to +85°C, VCC = 3.1 V to 3.5 V Parameter Receiver Overload Receiver Sensitivity Stressed Receiver Sensitivity Stressed Receiver Eye Opening at TP4 Receiver Electrical 3 dB Upper Cutoff Frequency Operating Center Wavelength Return Loss Signal Detect - Asserted Signal Detect - Deasserted Signal Detect - Hysteresis Symbol PINMAX PINMIN Min -3 Typ Max -20 -14.4 201 1500 lC PA PD PA - PD 1270 12 1570 -20 -30 1.5 Unit dBm avg dBm avg dBm avg ps MHz Reference 5 6, 7 4, 7 nm dB dBm avg dBm avg dB Notes: 1. The maximum Optical Output Power complies with IEEE 802.3 specification, and is class 1 laser eye safe. 2. These are unfiltered 20-80% values. 3. An eye diagram (Figure 9) specifies laser transmitter pulse response characteristics. The characteristics include rise time, fall time, pulse undershoot, and ringing, all of which are controlled to prevent excessive degradation of the receiver sensitivity. The referenced Gigabit Ethernet eye diagram using the required filter specifies these parameters. The output optical waveform at 1.25 Gb/s complies with the requirements of the eye mask discussed in section 38.6.5 and Fig. 38-2 of IEEE 802.3. 4. TP refers to the compliance point specified in 802.3, section 38.2.1. 5. The receiver sensitivity is measured using a worst case extinction ratio penalty while sampling at the center of the eye. For a 27-1 PRBS the receiver is guaranteed to provide output data with better than or equal to 1E - 15 BER. 6. The stressed receiver sensitivity is measured using the conformance test signal defined in 802.3, section 38.6.11. The conformance test signal is conditioned by applying deterministic jitter and intersymbol interference. 7. The stressed receiver jitter is measured at 1.25 Gb/s using the conformance test signal defined in 802.3, section 38.6.11 and set to an average optical power 0.5 dB greater than the specified stressed receiver sensitivity. 8. In order to meet the 10 km link power budget the transmitter can trade off spectral width and center wavelength as shown in Figure 10. 15 NORMALIZED TIME (UNIT INTERVAL) 0.625 0.22 0.375 0.78 1.0 130 1.30 100 1.00 80 0.80 50 0.50 20 0.20 0 0.0 -20 NORMALIZED AMPLITUDE NORMALIZED AMPLITUDE (%) 0 -0.20 0 37.5 62.5 78 22 NORMALIZED TIME (% OF UNIT INTERVAL) 100 Figure 9. Gigabit Ethernet Transmitter eye mask diagram 5 4.5 RMS spectral width (nm) 4 3.5 3 2.5 2 1.5 Minimum Launched Power -9.5 dBm 1 0.5 0 1270 1280 1290 1300 1310 1320 1330 1340 1350 Wavelength (nm) Figure 10. Maximum spectral width trade off curve derived from Gigabit Ethernet link model. 16 1360 Ordering Information 1310 nm FP Laser (Case operating temperature range -10°C to +85°C) HFCT-5981ATL Class 1 Laser Product: This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture Date of Manufacture: Agilent Technologies Inc., No 1 Yishun Ave 7, Singapore Handling Precautions 1. The HFCT-5981ATL can be damaged by current surges or overvoltage. Power supply transient precautions should be taken. 2. Normal handling precautions for electrostatic sensitive devices should be taken. www.agilent.com/ semiconductors For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (408) 654-8675 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6271 2451 India, Australia, New Zealand: (+65) 6271 2394 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6271 2194 Malaysia, Singapore: (+65) 6271 2054 Taiwan: (+65) 6271 2654 Data subject to change. Copyright © 2002 Agilent Technologies, Inc. Obsoletes: 5988-7983EN October 8, 2002 5988-8136EN