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data sheet 2.5gbps optical transceiver od-j8836/j8837/j8838/j8839 2.5gbps sfp optical transceiver ?nec corporation 2009 document no. ewm-19-0138-09e date published june 2009 cp (k) printed in japan
2 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 - contents - 1. des cripti on ................................................................................................................. .................... 3 2. feat ure ..................................................................................................................... ........................ 3 3. ordering informat ion ........................................................................................................ ...... 3 4. specifi catio ns .............................................................................................................. ................. 3 4-1. a bsolute m aximum r atings ................................................................................................................3 4-2. e nvironmental c onditions ..................................................................................................................4 4-3. o ptical s ignal i nterface s pecifications ....................................................................................4 4-4. e lectrical s ignal i nterface s pecifications .......................................................................................6 4-5. t iming r equirements of c ontrol and s tatus i/o ................................................................................7 5. memory map.................................................................................................................. ................... 8 6. digital diagno stic monitor ................................................................................................. 1 2 7. functional block di agram................................................................................................... 1 3 7-1. f unctional b lock d iagram ...............................................................................................................13 8. package size, pin assign ment .............................................................................................. 14 8-1. o utline ............................................................................................................................... ................14 8-2. p in d escription ............................................................................................................................... ....15 9. recommended peri pheral ci rcuit.................................................................................... 19 9-1. i nterface c ircuit ............................................................................................................................... 19 9-2. r ecommended h ost b oard s upply f iltering n etwork .....................................................................19 10. shipment packing ........................................................................................................... ......... 20 11. reli ability ................................................................................................................ ................... 20 11-1. fit rate ............................................................................................................................... .............20 11-2. r eliability test ............................................................................................................................... .20 12. certifi catio ns............................................................................................................. .............. 20 12-1. laser e ye s afety ............................................................................................................................20 12-2. f lammability ............................................................................................................................... .....20 12-3. e lectromagnetic compatibility ......................................................................................................20 13. application precauti ons .................................................................................................... .21 - revision hi story - ........................................................................................................... ............. 22
3 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 1. description od-j8836/ j8837/ j8838/ j8839 are ?small form factor pluggable? optical transceiver modules designed for 2.5gbps sonet/sdh/atm systems. 2. feature designed for sonet/sdh/atm systems small form factor pluggable (sfp) single +3.3v power supply long distance transmission wide operating temperature range lc optical duplex receptacle digital diagnostic monitoring function 3. ordering information product number specification optical connector latch mechanism od-j8836-xxxx sonet oc-48 sr, itu-t g.957 i-16 od-j8837-xxxx sonet oc-48 ir-1, itu-t g.957 s-16.1 od-j8838-xxxx sonet oc-48 lr-1, itu-t g.957 l-16.1 od-j8839-xxxx sonet oc-48 lr-2, itu-t g.957 l-16.2 lc duplex bail type product number operating case temperature range od-xxxxx-5c01 0 to +75 deg. c od-xxxxx-5d01 -10 to +85 deg. c these show standard part number. when customizing, e. g., labeling, memory or etc ., is requested, special part number shall be provided. 4. specifications 4-1. absolute maximum ratings specification parameter unit min max note storage temperature 1 deg.c -40 +85 supply voltage (vcct, vccr) v -0.3 +4.0 input data signal levels (ac coupled) vpp +3.0 relative humidity (non-condensing) % 85 static discharge voltage (human body model) v 500 +3 od-j8836 od-j8837 peak optical input power dbm -6 od-j8838 od-j8839 1 temperature range for storage without device damage.
4 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 4-2. environmental conditions parameter unit specification note data rate 2 bps 2.48832g data format scrambled nrz scrambler is not included. transmission cable smf (itu-t g.652) 0 to +75 od-xxxxx-5c01 operating case temperature range deg.c -10 to +85 od-xxxxx-5d01 supply voltage (vcc) v +3.3 +/ ? 5% od-j8836 0.6 od-j8837 0.6 od-j8838 0.6 w (typ) od-j8839 0.6 @+25 deg.c, +3.3v od-j8836 1.0 od-j8837 1.0 od-j8838 1.4 power consumption w (max) od-j8839 1.4 @+85 deg.c, +3.465v inrush current a 0.03 max connector to pcb board 20 pins serial electrical signal serial 2 all descriptions here are specified by stm-16/ sonet oc-48 (2.48832gbps) 4-3. optical signal interface specifications transmitter parameter unit od-j8836 od-j8837 od-j8838 od-j8839 laser diode type - mlm-ld slm-ld center wavelength nm 1270 - 1360 1280 - 1335 1500 - 1580 maximum rms width nm 4 ? maximum -20db width nm ? 1 minimum smsr db ? ?30 mean launched power dbm ?10 to ?3 ?5 to 0 ?2 to +3 extinction ratio db 8.2 optical output eye diagram 4 - itu-t g.957 compliant (fig.1) optical output rise/fall time (20%-80%) ps <150 output power with tran smitter disabled dbm 5 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 fig. 1 optical output signal mask specifications of sonet/itu standard specified by the waveform after passing through 4th orde r bessel-filter which has cut-off frequency of 2.48832ghz 0.75. optical path parameter unit od-j8836 od-j8837 od-j8838 od-j8839 attenuation range 5 db 0 to 7 0 to 12 10 to 24 residual chromatic dispersion ps/nm <12 na <1600 optical path penalty db <1 <2 discrete reflectance between s n and r n 6 db < ? 27 return loss at point s n 6 (including any connectors) db >24 5 the 10db instead 12db is achieved using external optical attenuator. (od-j8838, j8839) 6 s and r are the point at the transmitter and the point at the receiver following the definition of the itu-t g.957. receiver parameter unit od-j8836 od-j8837 od-j8838 od-j8839 photo diode type pin-pd apd operating wavelength range nm 1260 ? 1580 minimum sensitivity 7 (@ber=1e-10) dbm ?18 ?27 ?28 minimum overload 7 dbm -3 0 -9 reflectance of receiver db <-27 optical signal polarity - positive logic 7 back-to-back as per itu-t g.957 under over all operati ng conditions, transmitter extinction ratio 8.2db and prbs=2 23 -1 at 2.48832 gbit/s.
6 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 4-4. electrical signal interface specifications 4-4-1. transmitter specification note parameter unit min typ max differential input signal level mvp-p 500 2400 differential input resistance ohm 85 100 115 fault condition o.c. tx fault 8 normal condition v 0 0.4 3ma sink disable state 2 vcct tx disable enable state v 0 0.8 4-4-2. receiver specification note parameter unit min typ max differential output voltage mvp-p 370 1200 fault condition o.c. los output level 8 normal condition v 0 0.4 1.2ma sink 8 open collector output.
7 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 4-5. timing requirements of control and status i/o parameter symbol uni t min max note tx disable assert time t_off us 10 tx disable negate time t_on ms 1 time to initialize, including reset of tx_fault t_init ms 300 tx fault assert time t_fault us 100 tx disable to reset t_reset us 10 los assert time t_loss_on us 100 los deassert time t_loss_off us 100 serial id clock rate f_serial_clock khz 100 power on initialization of sfp, tx_disable negated. power on initialization of sfp, tx_disable asserted. initialization during hot plugging of sfp. example of initialization during hot plugging, tx_disable negated. sfp tx_disable timing during normal operation. detection of transmitter safety fault condition successful recovery from transient safety fault condidion unsuccessful recovery from safety fault condition timing of los detection
8 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 5. memory map memory contents herein are for nec standard products. customizing is available. not supported
9 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 2 wire address 1010000x (a0h) memory data address name of field value (hex) description base id fields 0 identifier 03 sfp 1 ext. identifier 04 by serial id 2 connector 07 lc 3 transceiver 00 01 oc-48 sr (od-j8836) 12 oc-48 ir-1 (od-j8837) 14 oc-48 lr-1 (od-j8838) 4 transceiver 0c oc-48 lr-2 (od-j8839) 5 transceiver 00 6 transceiver 00 7 transceiver 00 8 transceiver 00 9 transceiver 00 10 transceiver 00 11 encoding 05 sonet scrambled 12 br, nominal 19 2.5gbps 13 reserved 00 02 2km (od-j8836) 0f 15km (od-j8837) 28 40km (od-j8838) 14 length(9um)-km 50 80km (od-j8839) 14 2000m (od-j8836) 96 15000m (od-j8837) ff >25500m (od-j8838) 15 length (9um) ff >25500m (od-j8839) 16 length (50um) 00 17 length (62.5um) 00 18 length (copper) 00 19 reserved 00 20-35 vendor name 4e 45 43 20 43 4f 52 50 4f 52 41 54 49 4f 4e 20 nec_corporation_ 36 reserved 00 37-39 vendor oui 00 00 4c nec oui code 4f 44 2d 4a 38 38 33 36 2d 35 43 30 31 20 20 20 od-j8836-5c01___ (od-j8836) 4f 44 2d 4a 38 38 33 37 2d 35 43 30 31 20 20 20 od-j8837-5c01___ (od-j8837) 4f 44 2d 4a 38 38 33 38 2d 35 43 30 31 20 20 20 od-j8838-5c01___ (od-j8838) 40-55 vendor pn 4f 44 2d 4a 38 38 33 39 2d 35 43 30 31 20 20 20 od-j8839-5c01___ (od-j8839) 56-59 vendor rev 30 30 30 31 0001 05 1e 1310nm (od-j8836/j8837/j8838) 60-61 wavelength 06 0e 1550nm (od-j8839) 62 reserved 00 63 cc_base check sum of byte 0 to 62 extended id fields 64 options 00 reserved 65 options 1a tx_disable, tx_fault, los 66 br, max 00 unspecified 67 br, min 00 unspecified 68-83 vendor sn serial number 84-91 date code year, month 92 diagnostic type 58 external calibration 93 enhanced options b0 soft tx_fault, rx_los 94 sff-8472 01 compliance 95 cc_ext check sum of byte 64 to 94 vendor specific id fields 96-127 vendor specific 00 all
10 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 2 wire address 1010001x (a2h) memory alarm and warning threshold address bytes name description 00-01 2 temp high alarm +85 deg. c 02-03 2 temp low alarm -40 deg. c 04-05 2 temp high warning 5c01; +75 deg. c, 5d01; +85deg. c 06-07 2 temp low warning 5c01; 0 deg. c, 5d01; -10deg. c 08-09 2 vcc high alarm + 4.0 v 10-11 2 vcc low alarm + 3.13 v 12-13 2 vcc high warning + 3.47 v 14-15 2 vcc low warning + 3.13 v 16-17 2 bias high alarm 100 ma 18-19 2 bias low alarm 0 ma 20-21 2 bias high warning 80ma 22-23 2 bias low warning 0 ma 24-25 2 tx power high alarm j8836; - 3dbm, j8837; 0dbm, j8838/j8839; +3dbm 26-27 2 tx power low alarm j8836; -10db m, j8837; -5dbm, j8838/j8839; -2dbm 28-29 2 tx power high warning j8836; - 3dbm, j8837; 0dbm, j8838/j8839; +3dbm 30-31 2 tx power low warning j8836; - 10dbm, j8837; -5dbm, j8838/j8839; -2dbm 32-33 2 rx power high alarm j8836; - 2dbm, j8837; 1dbm, j8838/j8839; -8dbm 34-35 2 rx power low alarm j8836/ j8837; -19dbm, j8838/j8839; -29dbm 36-37 2 rx power high warning j8836; - 3dbm, j8837; 0dbm, j8838/j8839; -9dbm 38-39 2 rx power low warning j8836/ j8837; -18dbm, j8838/j8839; -28dbm 40-55 16 reserved reserved calibration data address bytes name description 56-59 4 rx_pwr 4 single precision floating-point ca libration data for receiving power. bit 7 of byte 56 is msb. bit 0 of byte 59 is lsb. 60-63 4 rx_pwr 3 single precision floating-point ca libration data for receiving power. bit 7 of byte 60 is msb. bit 0 of byte 63 is lsb. 64-67 4 rx_pwr 2 single precision floating-point ca libration data for receiving power. bit 7 of byte 64 is msb. bit 0 of byte 67 is lsb. 68-71 4 rx_pwr 1 single precision floating-point ca libration data for receiving power. bit 7 of byte 68 is msb. bit 0 of byte 71 is lsb. 72-75 4 rx_pwr 0 single precision floating-point ca libration data for receiving power. bit 7 of byte 72 is msb. bit 0 of byte 75 is lsb. 76-77 2 tx_i slope fixed decimal (unsigned) calibrati on data for laser bias current. bit 7 of byte 76 is msb. bit0 of byte 77 is lsb. 78-79 2 tx_i offset fixed decimal (signed 2's complement) ca libration data for laser bias current. bit 7 of byte 78 is msb. bit0 of byte 79 is lsb. 80-81 2 tx_pwr slope fixed decimal (unsigned) calibrati on data for optical output power. bit 7 of byte 80 is msb. bit0 of byte 81 is lsb. 82-83 2 tx_pwr offset fixed decimal (signed 2's complement ) calibration data for optical output power. bit 7 of byte 82 is msb. bit0 of byte 83 is lsb. 84-85 2 t slope fixed decimal (unsigned) calibrati on data for module temperature. bit 7 of byte 84 is msb. bit0 of byte 85 is lsb. 86-87 2 t offset fixed decimal (signed 2's comple ment) calibration data for module temperature. bit 7 of byte 86 is msb. bit0 of byte 87 is lsb. 88-89 2 v slope fixed decimal (unsigned) calibration dat a for module supply voltage. bit 7 of byte 88 is msb. bit0 of byte 89 is lsb. 90-91 2 v offset fixed decimal (signed 2's complement ) calibration data for module supply voltage. bit 7 of byte 90 is msb. bit0 of byte 91 is lsb. 92-94 3 reserved reserved 95 1 checksum low order 8 bits of the sum of bytes 0 to 94.
11 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 a/d monitor value address bytes name description 96 1 temperature upper byte 97 1 temperature lower byte internally measured module temperature 98 1 vcc upper byte 99 1 vcc lower byte internally measured supply voltage in transceiver 100 1 tx bias upper byte 101 1 tx bias lower byte internally measured tx bias current 102 1 tx power upper byte 103 1 tx power lower byte measured tx output power 104 1 rx power upper byte 105 1 rx power lower byte measured rx input power 106 1 reserved 107 1 reserved reserved 108 1 reserved 109 1 reserved reserved status bit address #bit name description 7 tx disable state 6 soft tx disable command 5 reserved 4 rx rate select state 3 soft rx rate select command 2 tx fault state digital state of the tx fault output pin. 1 los state digital state of the los output pin. 110 0 data ready bar 111 7-0 reserved real time diagnostic resister address #bit name description 7 temp high alarm set when internal temperature exceeds high alarm level 6 temp low alarm set when internal te mperature is below low alarm level 5 vcc high alarm set when internal s upply voltage exceeds high alarm level 4 vcc low alarm set when internal supply voltage is below low alarm level 3 tx bias high alarm set when tx bias current exceeds high alarm level 2 tx bias low alarm set when tx bias current is below low alarm level 1 tx power high alarm set when tx out put power exceeds high alarm level 112 0 tx power low alarm set when tx output power is below low alarm level 7 rx power high alarm set when rx rece iving power exceeds high alarm level 6 rx power low alarm set when rx receiving power is below low alarm level 113 5-0 reserved 114 7-0 reserved 115 7-0 reserved 7 temp high warning set when internal temperature exceeds high warning level 6 temp low warning set when internal temperature is below low warning level 5 voltage high warning set when internal supply voltage exceeds high warning level 4 voltage low warning set when internal supply voltage is below low warning level 3 tx bias high warning set when tx bias current exceeds high warning level 2 tx bias low warning set when tx bias current is below low warning level 1 tx pwr high warning set when tx out put power exceeds high warning level 116 0 tx pwr low warning set when tx output power is below low warning level 7 rx pwr high warning set when rx rece iving power exceeds high warning level 6 rx pwr low warning set when rx receiv ing power is below low warning level 117 5-0 reserved
12 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 the others address bytes name description 118-119 2 reserved 120-127 8 vender specific reserved 128-247 120 user writable eeprom 00 all 248-255 8 vender specific 00 all 6. digital diagnostic monitor parameter unit od-j8836 od-j8837 od-j8838 od-j8839 tx optical power db +/? 3 (-10 to -3 dbm) +/? 3 (-5 to 0 dbm) +/? 3 (-2 to +3 dbm) rx optical power db +/? 3 (-3 to ?18 dbm) +/? 3 (0 to -18dbm) +/? 3 (?9 to ?28dbm) bias current % +/? 10 (5 to 100ma) power supply voltage % +/? 3 (3.13 to 3.47v) transceiver case temperature deg. c +/? 3 (5c01:0 to +75deg.c, 5d01: -10 to +85deg.c)
13 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 7. functional block diagram 7-1. functional block diagram a) transmitter ld drv: laser diode driver, dac: digital to analogue converter, t/v conv.: temperature to voltage converter, apc: automatic power control circuit, adc: analogue to digital converter, eeprom: electronic erasable rom, pd: photo diode, ld: laser diode b) receiver apd: avalanche photo diode, tia: trans impedance am plifier, lim: limiting amplifier, alm det: alarm detector
14 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 c) digital diagnostic monitor side adc: analogue to digital converter 8. package size, pin assignment 8-1. outline (unit in mm)
15 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 8-2. pin description fig. diagram of host board connector block pin numbers and names pin num. name function plug seq. note 1 veet transmitter ground 1 2 tx fault transmitter fault indication 3 note 1) 3 tx disable transmitter disable 3 note 2) module disables on high or open 4 mod-def2 module defin ition 2 3 note 3), 2wire serial id interface 5 mod-def1 module defin ition 1 3 note 3), 2wire serial id interface 6 mod-def0 module de finition 0 3 note 3), grounded in module 7 nuc nuc 3 8 los loss of signal 3 note 4) 9 veer receiver ground 1 10 veer receiver ground 1 11 veer receiver ground 1 12 rd- inv. received data out 3 note 5) 13 rd+ received data out 3 note 5) 14 veer receiver ground 1 15 vccr receiver power 2 3.3v5%, note 6) 16 vcct transmitter power 2 3.3v5%, note 6) 17 veet transmitter ground 1 18 td+ transmit data in 3 note 7) 19 td- inv. transmit data in 3 note 7) 20 veet transmitter ground 1 plug seq: pin engagement sequence during hot plugging.
16 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 1) tx fault is an open collector output, which should be pulled up with a 4.7k-10k ? resister on the host board. pull up voltage between 2.0v and vcct. when high, output indicates a laser fault of some kind. low indicates normal operation. in the low state, the output will be pulled to <0.8v. 2) tx disable is an input that is us ed to shut down the transmitter optical output. it is pulled up within the module with a 4.7k-10k ? resister. 3) mod-def 0,1,2. these are the module definition pins. they should be pulled up with a 4.7k-10k ? resister on the host board. the pull-up voltage shall be vcct or vccr. mod-def 0 is grounded by the module to indicate that the module is present mod-def 1 is the clock line of two wire serial interface for serial id mod-def 2 is the data line of two wire serial interface for serial id 4) los(loss of signal) is an open collector output, which should be pulled up with a 4.7k-10k ? resister. pull up voltage between 2.0v and vccr. low indicates normal operation. in the low state, the output will be pulled to <0.8v. 5) rd-/+: these are the differential recei ver outputs. they are ac coupled 100 ? differential lines which should be terminated with 100 ? (differential) at the user serdes. the ac coupling is done inside the module and is thus not required on the host board. 6) vccr and vcct are the receiver and transmitter power supplies. they are defined as 3.3v5% at the sfp connector pin. recommended host board pow er supply filtering is shown fig.7-2. 7) td-/+: these are the differential transmitter inputs. they are ac-coupled, differential lines with 100 ? differential termination inside the module. the ac coupling is done inside the module and is thus not required on the host board.
17 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 fig. sfp host board mechanical layout fig. sfp host board mechan ical layout (cont.)
18 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 fig. recommended bezel design
19 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 9. recommended peripheral circuit 9-1. interface circuit 9-2. recommended host board supply filtering network
20 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 10. shipment packing 11. reliability 11-1. fit rate @ 45 deg. c total fit rate od-j8836-xxxx 359 fit od-j8837-xxxx 623 fit od-j8838-xxxx 657 fit od-j8839-xxxx 504 fit 11-2. reliability test gr468-core 12. certifications 12-1. laser eye safety iec 60825-2 class 1 12-2. flammability to be qualified by ul94v1 12-3. electromagnetic compatibility fcc part15 class b
21 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 13. application precautions a) to prevent optical connector surface fro m crack or stain, please put the dus t cap while this device is not in use. when the connector surface is stained, please wipe with a kind of lens paper. b) optical components are mounted insi de this device. please handle with car e. mechanical shock due to falling could lead permanent damage. c) the device performance given in this manual is guara nteed for correct applicati ons. device performances are not guaranteed under incorrect use. d) sudden heating or cooling by dryer or cooling spray could lead permanent damage to the device. the device may not work normally while sudden heating or cooling. e) this product should be handled as a cmos product. f) don't insert the module upside down. if the module is inserted into the cage on the host-board upside down, it may cause circuit to short out in the host-board. see insert direction below. fig. insert direction sfp cage pwb
22 data sheet ewm-19-0138-09e od-j8836/j8837/j8838/j8839 - revision history - revision date contents 1.0 december 5, 2003 first release 2.0 january 20, 2004 p.3, 4-1. average optical input power +2dbm to +3dbm for od-j8836/ 8837 3.0 march 3, 2004 p.14, 8-1 outline; revised p.20, 11-1 fit rate; revised 4.0 april.9.2004 p.4, 4-3 transmitter side; revised add bol specifications receiver side ; revised add bol specifications p.9, 5 memory map; revised tx power alarm, warning rx power alarm, warning p.12, 6 digital diagnostic monitor accuracy p.21, 13 application precautions; revised 5.0 june 15, 2004 p.4, 4-2 power consumption (max) for od-j8839 reduced to 1.2w. p.4, 4-3 operating condition for the data rate is corrected to 2.48832gbps. p.9, 5 data values in a0h memory area are corrected. brmax, brmin, diagnostic type and vendow specific. 6.0 december 16, 2004 sales office address and phone number are changed. 7.0 october 11, 2006 product number ; revised and added group name changed : from ?0x01? to lead free group name : ?5x01? add squelch function enable products : ?od-xxxxx-5c01?and ?od- xxxxx-5d01? shipment packing ; added 8.0 march, 2009 deleted grp.5a01 and 5b01 9.0 june, 2009 changed contact information
areas of caution in the handling of laser diode products. y this product complies with iec 60825-2. y it is correspond to the category ?class 1 laser product? under iec regulation. y during operations, the laser diode discharges red beams and infrared beams invisible to the eye. since it is very hazardous if these beams directly, or bypassing through a lens, get in one?s eyes, please try to avoid this. y take proper electrostatic-discharge ( esd) precautions while handling the device. the device is sensitive to esd. y may cause of damage if drop or subject to s hock. this product includes optical parts. y caution-use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. areas of caution in handling gaas. there are some products in our catalogue that use gaas. please strictly adhere to the caution items appearing below, in order t o prevent dangerous situations. { do not put the product in your mouth. { do not turn the product into a vaporous or powdered fo rm through burning, grinding or chemical processing. { when disposing of the product, follow related laws, and y our company?s internal waste control regulations. areas of caution in handling optical fiber products. y be careful not to pierce your skins as the tips of optical fi bers are extremely sharp. especially you must attention in case of hazardous if they pierce one?s eyes. y do not apply extreme stress to optical fiber, or it may cause deterioration of characteristics or disconnection. the force of pull should be less than 200gf, and, a radius for bending should be larger than r30 mm y do not hold only optical fiber or module package, because extreme stress is easy to apply to the optical fiber edge of the mod ule in generally, failure occurs in electronic components with a ce rtain probability. we at nec work to improve the quality and reliability of industrial electronic components, but it is impo ssible to reduce such probability to zero. this being the case, users of nec industrial electronic components are reques ted to provide redundant desi gn, counterburning design, malfunction prevention design and other safe ty design to prevent failures that may cause possible accidents involving injuries of death, fire, social damages, etc. nec classifies the quality standard of its industrial electronic components into three categories, from the ?standard level? for lower quality upward to ?special level? and ?specific leve l? for which customers are requested to designate their own quality assurance program. respective qua lity levels are intended to being used for the following applications. in this connection, users consideri ng to use nec components for other than the ?standard level? application are always requested to contact an nec sale s representative in advance. standard level: for computers, o.a.(office automa tion) equipment, telecommunica tions equipment, measuring equipment, av(audio/video) equipment, home electric appliances, mach ine tools, personal equipment and industrial robots. special level: transportation machinery (automobiles, trains, ships, etc.), traffic signal equipment, disaster/crime prevention devices, various safety devices, and medical equipment not directly intended for life support. specific level: aeronautical equipment, aerospace equipm ent, submarine relay equipment, nuclear control system, and medical equipment, devices or systems for life support. nec does not manufacture, as standard items, products reco mmendable to such ?specific? applications as aerospace equipment, submarine relay equipment, nuclear control syst em and life-support medical equipment, which all require a very high levels of reliability. customers planning to us e our products for the above-m entioned applications or those planning to use our products of ?standar d? or ?special? quality level for other application than intended by us, are requested to contact in addition, please note that nec industrial electronic com ponents listed in catalogs, data sheets, data books and other materials published by nec without the indi cation of their quality level are all of the standard quality level.
y specifications and/or other content of the products carried in nec publications are subject to change without notice. { reproduction of this document is prohibited without the prior written permission of nec. { nec shall not be liable for problems involvi ng the industrial property right of third parties and arising from the use of nec product(s) unless the problem directly related with the structure and/or method of manufacture of the products. { these products are not designed for radiation resistance. { of the products carried by this catalog, those failing under the category of restricted cargo, etc.(or services) as stipulated by the foreign exchange and foreign trade c ontrol law require an export license from the japanese government according to the same law before export to countries outside japan.. contact information: nec corporation fiber optic devices division (shin tamachi building) 34-6, shiba 5-chome, minato-ku, tokyo 108-0014, japan tel: +81-3-3798-5864 fax: +81-3-3798-5857 nec corporation of america usa & canada) fiberoptech division mail stop# nc1000 2880 scott blvd, santa clara, ca 95050, u.s.a. tel:+1-408-844-1082 fax: +1-408-844-1090 nec electronics (europe) gmbh sales and marketing of semiconductors across europe arcadiastrasse 10, d-40472 dusseldorf, germany tel: +49-211-6503-0 fax: +49-211-6503-1344

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