lc? is a trademark of lucent fiber optics march 2002 V23818-M305-L58 (*) small form factor multimode 850 nm 2.125 and 1.0625 gbd fibre channel 2x6 transceiver with lc? connector features small form factor transceiver full compliant with fibre channel data rate autonegotiation between 1.0625 and 2.125 gbd features laser fault (lf) function excellent emi performance rj-45 style lc? connector system half the size of sc duplex 1x9 transceiver single power supply (3.3 v) extremely low power consumption of 445 mw typical pecl and lvpecl differential inputs and outputs system optimized for 62.5/50 m graded index fiber multisource 2x5 footprint small size for high port density ul-94 v-0 certified esd class 2 per mil-std 883 method 3015 compliant with fcc (class b) and en 55022 for distances of up to 550 m class 1 fda and iec laser safety compliant ac/ac coupling in accordance to sff msa *) ordering information dimensions in mm [inches] v 23818-m 305 -l58 input output signal detect voltage part number ac ac ttl 3.3 v V23818-M305-L58
fiber optics V23818-M305-L58, sff, mm 850nm 2.125 gbd fibre channel, 2x6 trx (lc?) 2 absolute maximum ratings exceeding any one of these values may destroy the device immediately. package power dissipation................................................0.5 w data input levels (pecl) ............................................v cc +0.5 v differential data input voltage ............................................ 2.5 v operating case temperature..............................?10c to 85 c storage ambient temperature............................. ?40 c to 85c soldering conditions, temp/time (mil-std 883c, method 2003) ........................... 250c/ 5.5 s v cc max.............................................................................. 5.5 v ecl-output current data ...................................................50 ma description the infineon fibre channel multimode transceiver ? part of infineon small form factor transceiver family ? is based on the physical medium depend (pmd) sublayer and baseband medium, type (short wavelength), fibre channel dc 200-m5-sn-i and 200-m6-sn-i, dc 100-m5-sn-i and 100-m6-sn-i. the appropriate fiber optic cable is 62.5 m or 50 m multi- mode fiber with lc? connector. operating range over each optical fiber type at 2.125 gbd operating range over each optical fiber type at 1.0625 gbd the infineon fibre channel multimode transceiver is a single unit comprised of a transmitter, a receiver, and an lc? recepta- cle. this design frees the customer from many alignment and pc board layout concerns. this transceiver supports the lc? connectorization concept. it is compatible with rj-45 style backpanels for high end data com and telecom applications while providing the advan- tages of fiber optic technology. the module is designed for low cost san, lan, wan, fibre channel applications. it can be used as the network end device interface in mainframes, workstations, servers, and storage devices, and in a broad range of network devices such as bridges, routers, hubs, and local and wide area switches. this transceiver operates at 1.0625 / 2.125 gbit/s from a single power supply (+3.3 v). the full differential data inputs and out- puts are pecl and lvpecl compatible. functional description of 2x6 pin row transceiver this transceiver is designed to transmit serial data via multimode cable. functional diagram the receiver component converts the optical serial data into pecl compatible electrical data (rd+ and rd?). the signal detect (sd, active high) shows whether an optical signal is present. the transmitter converts pecl compatible electrical serial data (td+ and td?) into optical serial data. data lines are differen- tially 100 ? terminated. the transmitter contains a laser driver circuit that drives the modulation and bias current of the laser diode. the currents are controlled by a power control circuit to guarantee constant out- put power of the laser over temperature and aging. the power control uses the output of the monitor pin diode (mechanically built into the laser coupling unit) as a controlling signal, to pre- vent the laser power from exceeding the operating limits. single fault condition is ensured by means of an integrated automatic shutdown circuit that disables the laser when it detects transmitter failures. a reset is only possible by turning the power off, and then on again. the transceiver contains a supervisory circuit to control the power supply. this circuit makes an internal reset signal when- ever the supply voltage drops below the reset threshold. it keeps the reset signal active for at least 140 milliseconds after the voltage has risen above the reset threshold. during this time the laser is inactive. a low signal on txdis enables transmitter. if txdis is high the transmitter is disabled. the bandwidth of the receiver can be selected by toggling the rs input. fiber type min. (meters) ty p . (meters) max. (meters) 62.5 micron mmf 0.5 2 to 150 300 50.0 micron mmf 0.5 2 to 300 500 fiber type min. (meters) ty p . (meters) max. (meters) 62.5 micron mmf 0.5 2 to 300 400 50.0 micron mmf 0.5 2 to 550 700 laser driver power control receiver o/e o/e laser e/o rx coupling unit td ? td+ txdis lf rd ? rd+ sd laser coupling unit multimode fiber len monitor automatic shut-down
fiber optics V23818-M305-L58, sff, mm 850nm 2.125 gbd fibre channel, 2x6 trx (lc ? ) 3 technical data the electro-optical characteristics described in the following tables are valid only for use under the recommended operating conditions. recommended operating conditions transmitter electro-optical characteristics notes 1. into multimode fiber, 62.5 m or 50 m diameter. 2. laser power is shut down if power supply is below v th and switched on if power supply is above v th after t res . 3. fibre channel pi standard. receiver electro-optical characteristics notes 1. average optical power at which the ber is 1x10 ? 12 . measured with a 2 7 ? 1 nrz prbs and er=9 db. 2. an increase in optical power above the specified level will cause the signal detect output to switch from a low state to a high state. 3. a decrease in optical power below the specified level will cause the signal detect to change from a high state to a low state. 4. ac/ac for data. load 50 ? to gnd or 100 ? differential. for dynamic measurement a tolerance of 50 mv should be added. 5. supply current excluding rx output load. 6. fibre channel pi standard. 7. measured at the given stressed receiver eyeclosure penalty and dcd component given in fibre channel pi standard (2.03/2.18 db & 40/80 ps). parameter symbol min. typ. max. units case temperature t c ? 10 85 c power supply voltage v cc ? v ee 3.1 3.3 3.5 v transmitter data input differential voltage v diff 250 2400 mv receiver input center wavelength c 770 860 nm tr a n s m i t t e r s y m b o l m i n . ty p . m a x . u n i t s launched power (average) (1) p o ? 9.5 ? 6 ? 4dbm optical modula- tion amplitude (3) 2.125 gbit/s oma 196 450 w 1.0625 gbit/s 156 450 center wavelength c 830 850 860 nm spectral width (rms) l 0.85 relative intensity noise rin ? 117 db/hz extinction ratio (dynamic) er 9 13 db reset threshold (2) v th 2.5 2.75 2.99 v reset time out (2) t res 140 240 560 ms rise time, 20% ? 80% t r 130 150 ps supply current 45 65 ma receiver symbol min. typ. max. units sensitivity (average power) (1) 2.125 gbit/s p in ? 18.5 ? 16 dbm 1.0625 gbit/s ? 19 ? 17 saturation (average power) p sat 0 min. optical modulation amplitude (6) 2.125 gbit/s oma 24 49 w 1.0625 gbit/s 19 31 stressed receiv- er sensitivity 50 m fiber (7) 2.125 gbit/s s pin 29 96 1.0625 gbit/s 24 55 stressed receiv- er sensitivity 62.5 m fiber (7) 2.125 gbit/s s pin 34 109 1.0625 gbit/s 32 67 signal detect assert level (2) p sda ? 21 ? 18 dbm signal detect deassert level (3) p sdd ? 30 ? 22 signal detect hysteresis p sda ? p sdd 0.5 1 db signal detect assert time t ass 100 s signal detect deassert time t das 350 receiver 3 db cut-off frequency (6) 2.5 ghz receiver 10 db cut-off frequency (6) 6 data output differential voltage (4) v diff 0.5 0.7 1.23 v return loss of receiver a rl 12 db supply current (5) i ccrx 80 90 ma
fiber optics V23818-M305-L58, sff, mm 850nm 2.125 gbd fibre channel, 2x6 trx (lc ? ) 4 pin description pin information regulatory compliance eye safety this laser based multimode transceiver is a class 1 product. it complies with iec 60825-1 and fda 21 cfr 1040.10 and 1040.11. to meet laser safety requirements the transceiver shall be oper- ated within the absolute maximum ratings. caution all adjustments have been made at the factory prior to ship- ment of the devices. no maintenance or alteration to the device is required. tampering with or modifying the performance of the device will result in voided product warranty. note failure to adhere to the above restrictions could result in a modifica- tion that is considered an act of ? manufacturing ? , and will require, under law, recertification of the modified product with the u.s. food and drug administration (ref. 21 cfr 1040.10 (i)). laser data required labels laser emission pin name level/ logic pin# description rs rate select ttl 1 not connected v eer receiver signal ground n/a 2 v ccr receiver power supply n/a 3 sd signal detect ttl 4 normal operation: logic ? 1 ? output, represents that light is present at re- ceiver input fault condition: logic ? 0 ? output rd ? received data out not pecl 5 rd+ received data out pecl 6 v cct n/a 7 transmitter power supply v eet n/a 8 transmitter signal ground txdis transmitter disable/enable ttl input 9 a low signal switches the laser on. a high signal switches the laser off. td+ transmit data pecl 10 transmitter data in td ? transmit data not pecl 11 transmitter data in lf laser fault ttl 12 logical 1 indicates that la- ser shut-down is active. ms mounting studs n/a ms1 ms2 mounting studs are pro- vided for transceiver me- chanical attachment to the circuit board. they also provide an optional con- nection of the transceiver to the equipment chassis ground. hl housing leads n/a hl1 hl2 hl3 hl4 the transceiver housing leads are provided for ad- ditional signal grounding. the holes in the circuit board must be included and be tied to signal ground. (see application notes). feature standard comments esd: electrostatic discharge to the electrical pins eia/jesd22-a114-a (mil-std 883d method 3015.7) class 1 (>1000 v) tx rx hl4 hl1 hl2 hl3 1234 6 5 11 10 12 9 8 7 12-pin module - top view ms2 ms1 immunity: against electro- static discharge (esd) to the duplex lc receptacle en 61000-4-2 iec 61000-4-2 discharges ranging from 2 kv to 15 kv on the receptacle cause no damage to transceiver (under rec- ommended condi- tions). immunity: against radio fre- quency electro- magnetic field en 61000-4-3 iec 61000-4-3 with a field strength of 3 v/m rms, noise frequency ranges from 10 mhz to 2 ghz. no effect on transceiver performance between the specification limits. emission: electromagnetic interference (emi) fcc 47 cfr part 15, class b en 55022 class b cispr 22 noise frequency range: 30 mhz to 18 ghz wavelength 850 nm total output power (as defined by iec: 7 mm aperture at 1.4 cm distance) <400 w total output power (as defined by fda: 7 mm aperture at 20 cm distance) <70 w beam divergence 12 feature standard comments class 1 laser product iec complies with 21 cfr 1040.10 and 1040.11 fda 12 11 10 9 8 7 1 2 3 4 5 6 tx rx indication of laser aperture and beam
fiber optics V23818-M305-L58, sff, mm 850nm 2.125 gbd fibre channel, 2x6 trx (lc ? ) 5 application notes small form factor pinning comparison the drawing below gives you a comparison between the differ- ent pinnings 2x5, 2x6, 2x10. dimension for diameter and dis- tance of additional pins is similar to the existing dimensions of the other pins. pin description ras pin the rs rate select: is not connected. lf pin the lf pin (laser fault) is a ttl output of the laser driver supervisor circuit. a logic ? 1 ? level can be measured in case of a laser fault. it will not show a fault if the laser is being dis- abled using the txdis input, since this is not a fault condition. emi-recommendation to avoid electromagnetic radiation exceeding the required limits please take note of the following recommendations. when gigabit switching components are found on a pcb (multi- plexers, clock recoveries etc.) any opening of the chassis may produce radiation also at chassis slots other than that of the device itself. thus every mechanical opening or aperture should be as small as possible. on the board itself every data connection should be an imped- ance matched line (e.g. strip line, coplanar strip line). data, datanot should be routed symmetrically, vias should be avoided. a terminating resistor of 100 ? should be placed at the end of each matched line. an alternative termination can be provided with a 50 ? resistor at each (d, dn). in dc coupled systems a thevenin equivalent 50 ? resistance can be achieved as follows: for 3.3 v: 125 ? to v cc and 82 ? to v ee , for 5 v: 82 ? to v cc and 125 ? to v ee at data and datanot. please con- sider whether there is an internal termination inside an ic or a transceiver. in certain cases signal gnd is the most harmful source of radia- tion. connecting chassis gnd and signal gnd at the plate/ bezel/ chassis rear e.g. by means of a fiber optic transceiver may result in a large amount of radiation. even a capacitive cou- pling between signal gnd and chassis may be harmful if it is too close to an opening or an aperture. if a separation of signal gnd and chassis gnd is not possible, it is strongly recommended to provide a proper contact between signal gnd and chassis gnd at every location where possible. this concept is designed to avoid hotspots. hotspots are places of highest radiation which could be generated if only a few connections between signal and chassis gnd exist. compensation currents would concentrate at these connec- tions, causing radiation. by use of gigabit switching components in a design, the return path of the rf current must also be considered. thus a split gnd plane of tx and rx portion may result in severe emi prob- lems. a recommendation is to connect the housing leads to signal gnd. however, in certain applications it may improve emi per- formance by connecting them to chassis gnd. the cutout should be sized so that all contact springs make good contact with the face plate. please consider that the pcb may behave like a waveguide. with an r of 4, the wavelength of the harmonics inside the pcb will be half of that in free space. in this scenario even the smallest pcbs may have unexpected resonances. transceiver pitch top view rx tx vcc pin 1 rx vee 2 rx vee 3 rx clk - 4 rx clk + 5 rx vee 6 rx vcc 7 sd 8 rxd - 9 rxd + 10 rs 1 rx vee 2 rx vcc 3 sd 4 rxd - 5 rxd + 6 rx vee 1 rx vcc 2 sd 3 rxd - 4 rxd + 5 20 p mon + 19 p mon - 18 bias mon + 17 bias mon - 16 tx vee 15 txd - 14 txd + 13 tx dis 12 tx vee 11 tx vcc 12 laser fault 11 txd - 10 txd + 9 tx dis 8 tx vee 7 tx vcc 10 txd - 9 txd + 8 tx dis 7 tx vee 6 tx vcc 2 x 5 2 x 6 2 x 10 (13.97) .550 *) *) min. pitch between sff transceiver according to msa. dimensions in (mm) inches
published by infineon technologies ag ? infineon technologies ag 2002 all rights reserved attention please! the information herein is given to describe certain components and shall not be considered as warranted characteristics. terms of delivery and rights to technical change reserved. we hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. infineon technologies is an approved cecc manufacturer. information for further information on technology, delivery terms and conditions and prices please contact the infineon technologies offices or our infineon technologies representatives worldwide - see our webpage at www.infineon.com/fiberoptics warnings due to technical requirements components may contain dangerous substances. for information on the types in question please contact your infineon technologies offices. infineon technologies components may only be used in life-support devices or systems with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered. infineon technologies ag fiber optics wernerwerkdamm 16 berlin d-13623, germany infineon technologies, inc. fiber optics 1730 north first street san jose, ca 95112, usa infineon technologies k.k. fiber optics takanawa park tower 20-14, higashi-gotanda, 3-chome, shinagawa-ku to ky o 14 1, j a p a n multimode 850 nm fibre channel 2x6 transceiver, ac/ac ttl values of r1/2/3/4 may vary as long as proper 50 ? termination to v ee or 100 ? differential is provided. the power supply filter- ing is required for good emi performance. use short tracks from the inductor l1/l2 to the module v cc rx/v cc tx. vcsel driver signal detect limiting amplifier pre- amp rd ? rd+ tx+ tx ? serializer/ deserializer gigabit transceiver chip ecl/pecl driver receiver pll etc. infineon transceiver V23818-M305-L58 2 6 5 4 3 7 11 10 8 sd to upper level v eet td+ td ? v cct v ccr sd rd ? rd+ v eer v cc r7 r8 l1 l2 c2 c1 r3 r4 r1 r2 c3 v cc serdes 3.3 v v cc 3.3 v 100 ? ttl level 9 txdis 12 lf r7/8 = biasing (depends on serdes chip) place r1/2/3/4/7/8 close to serdes chip place r5/6 close to infineon transceiver c1/2/3 = 4.7 f l1/2 = 1 h r1/2 = depends on serdes chip used r3/4 = depends on serdes chip used
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