optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 1 lt-94c73c-p1g (rohs compliant) 3.3v / 2.488 gbps 1490 nm continuous-mode tx / 1.244 gbps 1310 nm burst-mode rx with burst-mode signal detect, itu-t g.984.2 g-pon class c 2x5 sff olt transceiver (with reset-less rx) **************************************************************************************************************************************************************************** features l class c optical line terminal (olt) for itu-t g.984.2 gigabit-capable pon l 2.488 gbps / 1490 nm continuous-mode transmitter l 1.244 gbps / 1310 nm burst-mode receiver with 2r output l resetless bm receiver design l bm rx with 32 bits packet-to-packet guard time for over 15db packet optical power difference l 0 to 70 o c operating l 2x5 sff package with sc/pc pigtail l single +3.3 v power supply l rohs compliant l transmitter: ac coupling input l receiver: dc coupling output l lvttl tx shutdown input l lvttl high-speed burst-mode rx signal detect l wave solderable and aqueous washable l class 1 laser international safety standard iec-60825 compliant applications l broadband g-pon system description lt-94c73c series is itu-t g.984.2 class c optical line terminal (olt) for 2.488 gbps/1490 nm in downstream and 1.244 gbps/1310 nm in upstream. the transmitter section uses a multiple quantum well 1490 nm dfb laser and is a class 1 laser compliant according to international safety standard iec-60825. the receiver section uses an integrated 1310 nm burst-mode detector preamplifier (idp) mounted in an optical header and a burst-mode limiting post-amplifier ic. unlike the conventional bm rx, the rx does not requires reset pulse to receive optical data packets with different optical power. lvpecl interface is used for differential inputs and outputs. a lvttl logic interface simplifies interface to external circuitry. laser safety this single mode transceiver is a class 1 laser product. it complies with iec-60825 and fda 21 cfr 1040.10 and 1040.11. the transceiver must be operated within the specified temperature and voltage limits. the optical ports of the module shall be terminated with an optical connector or with a dust plug. order information tx rx p/no class type speed (gb/s) (nm) power (dbm) type speed (gb/s) (nm) sens. (dbm) temp ( o c) package rohs compliant lt-94c73c-p1g c cnt 2.488 1490 dfb 7 / 3 bm, 2r 1.244 1310 -8 / -29 0 / 70 sff 2x5 yes lt-94b73b-p1g b+ cnt 2.488 1490 dfb 1.5 / 5 bm, 2r 1.244 1310 -8 / -28 0 / 70 sff 2x5 yes LT-94B73B-P1-AG b+ cnt 2.488 1490 dfb 1.5 / 5 bm, 2r 1.244 1310 -8 / -28 -20 / 85 sff 2x5 yes note: 1. lt-xxxxxx-pwxg, sc/pc pigtail with fiber length 50 cm. 2. bm: burst mode; cnt: continuous mode; sff: small form factor package.
optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 2 absolute maximum ratings parameter symbol min max units notes storage temperature tstg -40 85 o c operating case temperature topr 0 70 o c air flow 1m/sec @>60 o c power supply voltage vcc -0.5 3.6 v recommended operating conditions parameter symbol min max. unit units / notes power supply voltage vcc 3.13 3.47 v v operating case temperature topr 0 70 o c air flow 1m/sec @>60 o c power supply current i cc (tx+rx) 350 ma transmitter specifications ( 0 o c < topr < 70 o c, 3.13v < vcc < 3.47v ) parameter symbol min. typ. max. units notes optical optical transmit power po 3 7 dbm 1 output center wavelength l 1480 1500 nm output spectrum width ? 1 nm -20 db width side mode suppression ratio smsr 30 db extinction ratio e r 10 db data rate 2.488 gb/s optical rise time 150 ps 20% to 80% values optical fall time 150 ps 20% to 80% values relative intensity noise rin -120 db/hz downstream optical penalty 0.5 db electrical data input current C low -350 m a data input current C high 350 m a differential input voltage v ih - v il 400 2400 mv peak-to-peak shutdown input voltage -- low v tshdn,l 0 0.8 v tx output disable shutdown input voltage -- high v tshdn,h 2.0 vcc v tx output enable shut off time for tx shutdown t dis 30 m s 1. output power is power coupled into a 9/125 m m single mode fiber.
optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 3 receiver characteristics ( 0 o c < topr < 70 o c, 3.13v < vcc < 3.47v ) parameter symbol min. typ. max. units notes optical sensitivity sen -29 dbm 2 saturation optical power sat -8 dbm 2 wavelength of operation 1260 1360 nm 3 data rate 1.244 gb/s packet-to-packet guard time 32 bits 4,5 dc optical tolerance sen +3 db optical return loss 20 db signal detect -- asserted pa -28 dbm transition: low to high signal detect -- deasserted pd -40 dbm transition: high to low signal detect -- hysteresis 2 db electrical data output voltage C low v ol vcc - 1.935 vcc - 1.56 v data output voltage C high v oh vcc -1.135 vcc - 0.76 v consecutive identical digit immunity 72 bits signal detect output voltage -- low v ol 0.5 v signal detect output voltage -- high v oh 2.0 v signal detect assert time as max 10 15 30 ns transition: low to high signal detect deassert time ans max 80 100 150 ns transition: high to low rest between packet resetless 2. sensitivity and saturation levels at ber 1e-10 for a 2 23 -1 @er=10. 3. at least 30 db optical isolation for the wavelength 1480 to 1500 nm. 4. no reset is needed. 5. the optical power difference between neighboring packets is up to 15 db. connection diagram pin signal name description pin signal name description 1 rx ground receiver ground. connect this pin to ground plane. 10 td- negative transmitter data in. internally terminated for lvpecl. ac coupled. 2 rx vcc rx power supply input. connect to 3.3 v power supply 9 td+ positive transmitter data in. internally terminated for lvpecl. ac coupled. 3 rx sd signal detect. high when single is present (lvttl) 8 txdis transmitter disable. tx is disabled when this pin is low. internally pulled to high .. 4 rx out (-) negative rx output, differential lvpecl. dc coupled. 7 tx ground transmitter ground. directly connect this plan to ground plane 5 rx out (+) positive rx output, differential lvpecl. dc coupled. 6 tx vcc tx power supply input. connect to 3.3 v power supply ms ms mounting studs. connect to chassis ground
optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 4 packet-to-packet spacing figure 1. high-low packet test at hi/lo ratio=15 db bm receiver output hi-lo optical input tg=25 ns -13 dbm - 28 dbm 1.244 gbps, ber < 10 - 10
optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 5 time characteristics of signal detect figure 2. timing characteristics of signal detect. signal detect: low to high ~ 20 ns, high to low ~ 100 ns (> 100 bit 0 ) recommended circuit schematic signal detect rx output vcc 3.3v 10nf 10uf 1uh 1uh z=50r z=50r z=50r z=50r 130r 82r 82r 130r vcc 3.3v lvpecl lvpecl vcc 3.3v vcc3.3v td- td+ cdr or phy device ld driver post amp tx+ tx- tx gnd rx gnd rx- rx+ 10nf 10uf tx vcc rx vcc sff olt module 1 5 4 7 9 2 6 10 8 tx disable 100r signal detect 3 sd
optoway lt-94c73c-p1g ***************************************************************************************************************************************************************************** ***************************************************************************************************************************************************************************** optoway technology inc. no .3 8, kuang fu s. road, hu kou, hsin chu industrial park, hsin chu, taiwan 303 tel: 886-3-5979798 fax: 886-3-5979737 e-mail: sales@optoway.com.tw http: // www.optoway.com.tw 5/1/2006 v1.0 6 package diagram units in mm note: specifications subject to change without notice. the 50 +/- 3 cm long pigtail with a sc/pc connector is standard. if non-standard pigtail is required, please make a contact with optoway technology inc. recommended circuit board layout notes: 1. this figure describes the recommended circuit board layout for the sff olt transceiver. 2. the hatched areas are keep-out areas reserved for housing standoff. no metal traces or ground connection in keep-out area. 3. the mounting studs should be solder to chassis ground for mechanical integrity.
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