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1300 nm e-led transmitter and pin/preamp receiver for single-mode fiber technical data hfbr-0305 series features ? distances up to 14 km at signal rates of 20 mbd ? performance specified with single-mode fiber cables ? wave solder and aqueous wash process compatible ? panel mount st connectors ? pinout compatible with hfbr-0400 series parts applications ? single-mode extensions to ethernet (10base-f) links ? proprietary links using single-mode fiber description the hfbr-0305 series is designed to provide the most cost-effective single-mode solution, and is pin-compatible with hfbr-0400 and hfbr-0300 families of 820 and 1300 nm fiber optic links for multi-mode fiber. this allows designers to use a single circuit and board layout for 820 nm multimode fiber links, 1300 nm multimode fiber links, and 1300 nm single-mode fiber links. upgrading a multimode solution to single-mode fiber is as simple as switching components on a board. transmitter the hfbr-1315tm/1315m single-mode fiber-optic trans- mitter contains a 1300 nm edge- emitting led (e-led) capable of efficiently launching optical power into single-mode fiber. because it is an led, and not a laser, the drive circuit is simple and compatible with drive circuits for multimode led transmitters. receiver the hfbr-2315t/2315m receiver contains an ingaas pin photodiode and a low-noise transimpedance preamplifier operating in the 1300 nm wavelength region. the hfbr- 2315t/2315m receives an optical signal and converts it to an analog voltage. the buffered output is an emitter-follower, with a frequency response from dc to typically 125 mhz. package options metal port plastic port transmitter: threaded hfbr-1315tm n/a unthreaded hfbr-1315m n/a receiver: threaded n/a hfbr-2315t unthreaded HFBR-2315M n/a package hfbr-0305 series transmitters and receivers are housed in a dual-in-line package made of high strength, heat resistant, chemical resistant, and ul v-0 flame retardant plastic. the hfbr- 1315tm/1315m is a stainless steel, threaded st port (panel mountable); the hfbr-1315m is a stainless steel, unthreaded st port. the hfbr-2315t is a black, non-conductive plastic threaded st port (panel mountable); the HFBR-2315M is a stainless steel, unthreaded st port.
2 panel mounting of threaded st package style any standard 3/8 - 32 unef-2b threaded nut and washer can be used to secure the threaded st receptacle to the chassis wall, provided the overall thickness of the chassis wall, washer and nut are less than 5.1 mm (0.2 inch). agilent supplies the hfbr-4411 kit which consists of 100 each, nuts and washers per the figure below. when preparing the chassis wall for panel mounting, use the mounting template in the figure below. when tightening the nut, torque should not exceed 0.8 n-m (8.0 in-lb). note that the maxi- mum nut dimension exceeds the width of the port package, so approximately 2 mm of space between device packages is required to allow nuts to be mounted on adjacent ports. esd handling precautions the hfbr-0305 series products are mil-std 883c method 3015.4 class 1 devices. normal static precautions should be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by electrostatic discharge (esd) solder processing the hfbr-0305 series products are compatible with either hand or wave solder processes. when soldering, it is advisable to leave the protective cap on the port to keep the optics clean. good system performance requires clean port optics and cable ferrules to avoid obstructing the optical path. clean compressed air is often sufficient to remove particles of dirt; methanol on a cotton swab also works well. wash processing - chemical resistance the hfbr-0305 series package is compatible with the following chemicals for cleaning and degreasing: - aqueous wash - naptha - alcohol (methyl, isopropyl, isobutyl) - aliphatics (hexane, heptane) the following chemicals are not recommended as they will damage the package: partially halogenated hydrocarbons such as 1,1,1 trichloroethane, ketones such as mek, acetone, chloro- form, ethyl acetate, methylene dichloride and n-methylpyroldone. flame resistance the hfbr-0305 series package is made with ul v-0 flame retardant plastic material. electrostatic discharge (esd) static discharges can occur to the exterior of the equipment chassis containing the hfbr-0305 series parts. to the extent that their connector receptacles are exposed to the outside of the equipment chassis, they may be subject to whatever esd system level test criteria that the equipment is intended to meet. radiated susceptibility equipment utilizing these products will be subject to emi fields in some environments. these hfbr-0305 series prod- ucts are expected to withstand fields of up to 10 volts per meter, when tested on a circuit card in free space without an equipment chassis, with no measurable effect on their performance. a suggested test method is based on the equipment procedure specified in iec 801-3. 9.80 (0.386) dia. 8.0 (0.315) 14.27 (0.563) 9.53 (0.375) dia. internal tooth lock washer 12.70 (0.50) dia. 3/8 - 32 unef - 2b thread 1.65 (0.065) typ. dia. 10.41 (0.410) max. dia. all dimensions in millimeters and (inches). hex-nut 0.46 (0.018)
3 pin 1 indicator 6 anode 3 cathode bottom view pin function 1? 2* 3 4? 5? 6 7 8? n.c. n.c. cathode n.c. n.c. anode n.c. n.c. * there is no pin 2. i.e., in the number 2 pin position, there is no physical pin. ? pins 1, 4, 5, and 8 are isolated from the internal circuitry, but are electrically connected to each other and to the metal port. 8 1 3 5 2 4 6 7 pin 1 indicator bottom view 6 2 3, 7 v cc analog signal v ee pin function 1? 2 3* 4? 5? 6 7* 8? * pins 3 and 7 are electrically connected to the header. ? pins 1, 4, 5, and 8 are isolated from the internal circuitry, but are electrically connected to each other (and to the port if metal). n.c. signal v n.c. n.c. v v n.c. ee cc ee 4 5 7 1 6 8 2 3 recommended operating conditions for hfbr-0305 series products parameter symbol min. typ. max. unit reference operating temperature - ambient t a 070 c supply voltage v cc 4.75 5.25 v note 1 note: 1. the hfbr-2315t/2315m signal output is referenced to v cc , and does not reject noise from the v cc power supply. consequently, the v cc power supply must be filtered. link performance: at data rates 1-20 mbd parameter symbol min. typ. max. unit conditions reference optical power budget with opb 9 18 db 0 to 70 c note 1 single-mode fiber cables link distance with single- 14 km 0 to 70 c note 2 mode fiber cables notes: 1. optical power budget applies to hfbr-1315tm/1315m and hfbr-2315t/2315m in the recommended application circuit (figures 1 and 2). worst case transmitter coupled power (p t ) is -27 dbm peak, -30 dbm average. worst case receiver sensitivity is -36 dbm peak, -39 dbm average. refer to application note 1082 for details. 2. link distance is based on fiber with 0.5 db/km attenuation, and assumes 1 db for loss of in-line splices or connectors, and 1 db margin for led aging: (9 db opb - 1 db in-line splice loss - 1 db aging margin)/(0.5 db/km) = 14 km. pinout description hfbr-1315tm/1315m transmitters hfbr-2315t/2315m receivers mechanical dimensions all dimensions are in millimeters and (inches) 8 1 3 5 2 4 6 7 pin no. 1 indicator pins 1,4,5,8 0.51 x 0.38 (0.020 x 0.015) pins 2,3,6,7 0.46 (0.018) dia 12.6 (0.495) 3.81 (0.150) 2.54 (0.100) 3/8-32 unef-2a yyww hfbr-x31xt 12.6 (0.495) 5.05 (0.199) 7.05 (0.278) 29.8 (1.174) part number date code dia. 6.30 (0.248) 7.62 (0.300) 3.60 (0.140) 8.31 (0.327) 10.20 (0.400) 5.10 (0.202) 2.54 (0.100) 1.27 (0.050)
4 figure 1. recommended transmitter circuit. +5 v v cc j100 ttl in j102 enable in j103 -diff. in j104 +diff. in j105 0v system common j101 c14 0.1 mf j1 jumper j2 jumper 2 3 8 4, 5, 6 7 1 + lt 1016 u3 r5 510 w r6 510 w c15 0.1 mf c16 10 mf 20% 6 led hfbr-1315tm/1315m 3 u4d 74act11000 8 9 7 u4c 74act11000 11 10 6 u4b 74act11000 15 14 3 u4a 74act11000 1 16 2 5 4 18 w c17 47 pf r8 r7 notes: 1. all resistors 5% unless otherwise shown 2. all capacitors 10% unless otherwise shown + r9 390 w 18 w 12 13
5 r1 10 w c1 0.1 mf r2 1.2 k w d1 hlmp-4700 c2 0.01 mf c3 0.01 mf u1 hfbr-2315t/2315m 8 6 5 2 1 37 4 c4 0.1 mf link mon gnd vin vin + vdc cf2 cf1 gnd ttl 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 cmp en vth adj v ref c timer v cc ttl out ecl + ecl c5 4.7 pf c9 0.1 mf c10 0.047 mf c11 0.1 mf c12 0.1 mf c13 0.1 mf r3 r4 c6 10 mf 20% c7 10 mf 20% c8 0.1 mf l1 4.7 mh +5 v v cc 0 v gnd ttl out +diff. out ?iff. out notes: 1. c12, c13, r3, and r4 are required if the ttl and ecl outputs are used simultaneously. 2. r3 and r4 should not be smaller than 270 ohms. 3. all resistors 5%. 4. all capacitors 10% unless otherwise shown. u2 ml4622 + + figure 2. recommended receiver circuit.
6 hfbr-1315tm/1315m - transmitter electrical/optical characteristics (t a = 0 c to 70 c, i f = 100 ma unless otherwise specified) parameter symbol min. typ. [1] max. unit condition reference forward voltage v f 1.1 1.5 1.9 v t a = 25 c figure 3 1.0 2.0 forward voltage temperature d v f / d t -3.4 mv/ c coefficient center emission wavelength l c 1265 1310 1380 nm spectral width - fwhm dl 95 125 nm t a = 25 c 140 optical power temperature d p t / d t -0.07 db/ c coefficient reverse leakage current i r 200 m at a = 25 c, v r = -2 v thermal resistance q ja 105 c/w note 2 notes: 1. typical data are at t a = 25 c. 2. thermal resistance is measured with the transmitter coupled to a connector assembly and mounted on a printed circuit board; q jc < q ja . hfbr-1315tm/1315m - transmitter absolute maximum ratings parameter symbol min. max. unit condition storage temperature t s -40 85 c operating temperature t a -40 85 c lead soldering cycle temperature 260 c note 1 lead soldering cycle time 10 sec forward input current dc i fdc 100 ma forward input current, peak i fpk 175 ma 1 sec pulse reverse input voltage v r 2v notes: 1. 2.0 mm from where leads enter case. caution: it is advised that normal static precautions be taken in handling or assembly of these components to prevent damage and/or degradation which may be induced by esd.
7 hfbr-1315tm/1315m - transmitter optical output power and dynamic characteristics conditions parameter symbol min. typ. [1] max. unit t a i f,peak reference peak power p t -23 -21 -17 dbm 25 c 100 ma note 2 single-mode -27 -15 0-70 c 100 ma rise, fall time t r , t f 4.5 ns 0-70 c 100 ma, note 4 (10% to 90%) no pre-bias figure 5 rise, fall time t r , t f 2.6 ns 0-70 c 100 ma, note 4 (10% to 90%) 1.6 with pre-bias figure 1 notes: 1. typical data are at t a = 25 c. 2. optical power is measured with a large area detector at the end of 1 meter of single-mode cable, with an st* precision ceramic ferrule (mil-std-83522/13), which approximates a standard test connector. 3. when changing from m w to dbm, the optical power is referenced to 1 mw (1000 m w). optical power p(dbm) = 10*log[p( m w)/1000 m w]. 4. optical rise and fall times are measured from 10% to 90% with single-mode fiber. the no pre-bias response time is measured in the recommended test circuit (50 ohm load, figure 5) at 25 mhz, 50% duty cycle. the response time with pre-bias is measured in the recommended application circuit (figure 1). figure 3. typical forward voltage and current characteristics, 25 c. figure 5. test circuit for measuring t r , t f without pre-bias. figure 4. normalized transmitter output power vs. forward current, 25 c. 180 1.1 1.2 1.3 1.4 1.5 1.6 v f ?forward voltage ?v i f ?forward current ?ma 160 140 120 100 80 60 20 40 1.6 20 60 100 140 180 i f ?forward current ?ma relative power ratio 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 40 80 120 160 figure 4 pulse generator photodiode
8 hfbr-2315t/2315m - electrical/optical and dynamic characteristics (t a = 0 c to 70 c; 4.75 v < (v cc - v ee ) < 5.25 v; power supply must be filtered per note 2) parameter symbol min. typ. [3] max. unit condition reference responsivity, single- r p 8.5 17 24 mv/ m w l p = 1300 nm, note 4, mode fiber 50 mhz figures 6, 10 rms output noise v no 0.4 0.59 mv rms @100 mhz, note 5 voltage p r = 0 mw figure 7 1.0 mv rms unfiltered bandwidth p r = 0 mw equivalent optical noise p n,rms -45 -41.5 dbm @100 mhz, note 5 input power (rms) p r = 0 mw 0.032 0.071 m w peak input optical p r -14 dbm 50 mhz, 1 ns pwd note 6 40 m w output impedance z o 30 w f = 50 mhz dc output voltage v o,dc 0.8 1.8 2.6 v v cc = 5 v, v ee = 0 v p r = 0 mw supply current i cc 915mar load = electrical bandwidth bw e 75 125 mhz -3 db electrical note 7 bandwidth * rise time 0.41 hz * s note 8 electrical rise, fall t r,f 3.3 5.3 ns p r = -21 dbm peak, note 9 times, 10-90% @ 50 mhz figure 9 pulse-width distortion pwd 0.4 1.0 ns p r = -14 dbm, peak, note 10 single-mode fiber figure 8 overshoot 2 % p r = -21 dbm, peak note 11 hfbr-2315tm/2315m - receiver absolute maximum ratings parameter symbol min. max. unit condition storage temperature t s -55 85 c operating temperature t a -40 +85 c lead soldering cycle temperature 260 c note 1 lead soldering cycle time 10 sec signal pin voltage v o -0.5 v cc v supply voltage (v cc - v ee ) -0.5 6.0 v note 2 output current i o 25 ma caution: it is advised that normal static precautions be taken in handling or assembly of these components to prevent damage and/or degradation which may be induced by esd. figure 8 power, single-mode
9 notes: 1. 2.0 mm from where leads enter case. 2. the signal output is an emitter follower, which does not reject noise from v cc . consequently, the power supply must be filtered. the recom- mended supply is +5 v on v cc for typical usage with +5 v ecl logic. a -5 v supply on v ee is used for test purposes to minimize supply noise. 3. typical specifications are for operation at t a = 25 c, v cc = +5 v dc , v ee = 0 v. 4. the test circuit layout should be in accordance with good high frequency circuit design techniques. 5. measured with a mini-circuits 9-pole brick wall low-pass filter, blp-100, with -3 db bandwidth of 100 mhz. 6. -14 dbm is the maximum peak input optical power from single-mode fiber for which pulse-width distortion is less than 1 ns. 7. electrical bandwidth is the frequency where the responsivity is -3 db (electrical) below the responsivity measured at 50 mhz. 8. the bandwidth * risetime product is typically 0.41 because the hfbr- 2315t/2315m has a second-order bandwidth limiting characteristic. 9. the specified rise and fall times are referenced to a fast square wave optical source. rise and fall times measured using an led optical source with a 2.0 ns rise and fall time (such as the hfbr-1315tm/1315m) will be approximately 0.6 ns longer than the specified rise and fall times. e.g.: measured t r,f @ [(specified t r,f ) 2 + (test source optical t r,f ) 2 ] 1/2 10. 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform. 11. percent overshoot is defined as: ((v pk - v 100% )/v 100% ) x 100%. the overshoot is typically 2% with an input optical rise time < 1.5 ns. figure 10. normalized receiver spectral response. figure 9. typical rise and fall times vs. temperature. figure 8. typical pulse width distortion vs. peak input power. figure 7. typical output spectral noise density vs. frequency. figure 6. hfbr-2315t/2315m receiver test circuit. 150 0 50 100 150 200 250 frequency ?mh z 125 100 75 50 25 0 300 spectral noise density ? nv/ h z 6.0 -60 -40 -20 0 20 40 temperature ?? 5.0 4.0 3.0 2.0 1.0 60 t r , t f ?response time ?ns 80 100 t f t r 3.0 02030405070 p r ?input optical power ?? 2.5 2.0 1.5 1.0 0.5 0 80 pwd ?pulse width distortion ?ns 10 60 v = 0 v cc 6 v o 2 3, 7 test load 5 pf 500 w 100 pf 0.1 ? v = -5 v ee 10 w 500 w 100 pf 0.1 ? 1 ghz fet probe v = -5 v ee hfbr-2315t < 1.1 900 1000 1100 1200 1300 1400 l ?wavelength ?nm 1.0 0.9 0.8 0.7 0.6 0.1 1500 normalized response 0.5 0.4 0.3 0.2 1600 1700
figure 11. hfbr-2315t simplified schematic diagram. bias & filter circuits v cc v out v ee 6 2 3, 7 positive supply analog signal negative supply 5.0 ma 300 pf 10
www.semiconductor.agilent.com data subject to change. copyright ? 1999 agilent technologies, inc. obsoletes 5964-3544e (9/95) 5964-3544e (11/99)

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