622 mb/s logic interface dfb laser transmitter technical data XMT5170B-622 features ? sonet/sdh compliant to stm4 l-4.1 oc12 lr-1 ? 0c to +70c operation ? compact 20 pin package ? ecl/pecl logic interface ? multisourced pinout applications ? sonet/sdh systems ? fiber to the home ? data communications networks description the XMT5170B-622 is a high performance uncooled optical dfb laser transmitter for ccitt sdh and ansi sonet applications. it is designed with an ecl/pecl logic interface for 622 mb/s transmission. the transmitter incorporates several features which simplify system design. the XMT5170B-622 may be operated with either +5 v or - 5 v power supplies. its standard 10 kh ecl data interface enables direct interface with pecl or ecl logic. the compact transmitter module contains a pigtailed laser, data interface, bias and modulation control circuitry. thus, no external components or adjustments are necessary. finally, a laser disable input is provided to shut down the laser for standby or test purposes. the XMT5170B-622 provides analog voltage outputs which are proportional to laser bias current and optical power. these may be used with external circuitry to detect end-of-life, or over temperature conditions. the transmitter is packaged in a 20 pin 0.4 pitch dip. contact your local representative for more details.
2 connection diagram top view nc laser bias monitor (+) nc laser bias monitor (-) v ee v cc transmit disable v cc v cc nc 120 219 318 417 516 615 714 813 912 10 11 nc laser back facet monitor (+) v cc laser back facet monitor (-) data data v ee case ground (see note below) v cc case ground (see note below) fiber pigtail f f f f f f f f f f f f f f f f f f f f pin descriptions pins 1, 3, 10, 20, nc: these pins should not be connected and should be left open circuit on the application pcb. pin 2, laser bias monitor (+): see figure 1. pin 4, laser bias monitor (-): see figure 1. pins 5, 14, v ee : these pins are connected to ground in +5 v systems and -5 v in negative supply systems. if connected to -5 v supply, the network shown in figure 3 should be placed as close as possible to these pins. pins 6, 8, 9, 12, 18, v cc : these pins are connected to +5 v for positive supply systems and ground for -5 v systems. if connected to +5 v supply, the network shown in figure 3 should be placed as close as possible to these pins. pin 7, transmit disable: pin 7 floats to v ee when open circuited, enabling the transmitter. it must be biased within 3 v of v cc to disable. pins 11, 13, ground: the XMT5170B-622 case is plastic therefore these pins are not connected. pins 15, 16, data, data: these are differential ecl inputs. if open circuited, they will float to v bb ? (v cc -1.3 v). pin 17, laser back facet monitor (-): see figure 2. pin 19, laser back facet monitor (+): see figure 2. v cc 200 w 3 k w pin 19 3 k w pin 17 monitor photodiode to laser bias control circuitry modulation current v ee v cc 10 w 3 k w pin 2 3 k w pin 4 i bias laser figure 1. laser bias monitor circuitry figure 2. back facet monitor circuitry to device supply pin 10 f 1 nf 100 nf 1.0 h voltage supply (-5 v or +5 v) figure 3. filter network
3 XMT5170B-622 block diagram data data disable ecl input laser modulator laser bias driver laser bias control laser rear facet monitor laser bias monitor photodiode (rear facet monitor) functional description the ecl inputs allow operation from many logic families and both single-ended or differential signals. as both data and data are internally tied to v bb , for single ended operation the unused input requires no connection or biasing. the disable function disables the laser bias and modulator. the switching threshold is v cc -3.2 v. if this input is not connected the module is enabled. this input may be connected to a cmos hi or tied to v cc to disable. the module provides the necessary bias and modulation control to maintain the extinction ratio at better than 10 db and the waveform is compliant with sonet/sdh eyemask standard g.957. the laser bias control loop compensates for temperature induced variations in laser performance. the bias current monitor indicates the amount of dc current supplied to the laser. (this is approximately the laser threshold current). the rear facet monitor is a signal proportional to the laser output power. this can be used as part of a hi/lo light alarm. in the absence of data the laser will emit a mean optical power within the specified limits. the extinction ratio and duty cycle distortion are specified assuring a 50% duty cycle at the correct data rate.
4 performance specifications absolute maximum ratings absolute maximum limits mean that no catastrophic damage will occur if the product is subjected to these ratings for short peri ods, provided each limiting parameter is in isolation and all other parameters have values within the performance specification. it should no t be assumed that limiting values of more than one parameter can be applied to the product at the same time. characteristics notes: 1. in a coaxial direction with fiber feedthrough. 2. over operating temperature range. a narrower operating temperature range will result in a smaller center wavelength spread. contact hewlett-packard for details. 3. other output power options are available. contact hewlett-packard for details. 4. common mode signal v ee + 3.5 v nominal. 5. common mode signal v ee + 1.2 v nominal. 6. with v ee connected to -5 v, v cc must be at 0 v. with v cc at +5 v, v ee must be at 0 v. 7. end of life at tmax. parameter minimum nominal maximum units notes supply voltage - - 7 v - operating case temperature 0 - +70 c - storage temperature -40 - +85 c - fiber tensile strength 10 - - n/10s 1 fiber bend radius 32 - - mm - lead soldering (temp./time) - - +260/10 c/sec - parameter minimum nominal maximum units notes center wavelength 1280 - 1335 nm 2 spectral width (-20 db) - - 1 nm - side mode suppression ratio (smsr) 30 - - db - average output power -3 - +1.5 dbm 3 extinction ratio 10 - - db - bias monitor - 0.1 - ma/mv 4 rear facet monitor output 5 - 50 mv 5 supply voltage 4.75 5.0 5.5 v 6 supply current - - 150 ma 7 tx disable v cc -3.2 - v cc v- output waveform sonet/sdh eyemask compliant g.957
5 drawing dimensions l 20 11 10 1 c a b k h d f e ?g j dimension minimum nominal maximum a 32.9 - 33.2 b 39.5 40 40.5 c16.0 - 16.3 d- -9.27 e 2.6 - 2.95 f-2.54- ?g - 0.46 - h 2.7 - 3.2 j--4.64 k-10.16- l 400 - 1220 all dimensions in mm.
www.hp.com/go/fiber for technical assistance or the location of your nearest hewlett-packard sales office, distributor or representative call: americas/canada: 1-800-235-0312 or 408-654-8675 far east/australasia: call your local hp sales office. japan: (81 3) 3335-8152 europe: call your local hp sales office. data subject to change. copyright ? 1999 hewlett-packard co. obsoletes: 5966-0458e 5968-5114e (4/99) ordering information XMT5170B-622-xx connector: fp = fc/pc sc = sc st = st model name: xmt5170b allowable part numbers: XMT5170B-622-fp XMT5170B-622-sc XMT5170B-622-st handling precautions 1. normal handling precautions for electrostatic sensitive devices should be taken. 2. semiconductor lasers can be damaged by overloading or by current surges. appropriate transient protection should be taken. class 1 laser product: this product conforms to the applicable requirements of 21 cfr 1040 at the date of manufacture date of manufacture: hewlett packard ltd., whitehouse road, ipswich, england
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