1 21737-0390, rev. b 10-16-2003 ocp dtr-1250-sm-gb-i 5v gbic long distance single mode transceivers the dtr-1250-sm-gb-i product family of gbics provides long haul, single mode solutions for 1000base-lx gigabit ethernet ports in a networking switch. ocp offers four distance options to support 42km, 68km, 72km and 80km links in the networking infrastructure. option ?h3? uses a 1310nm dfb laser and provides a minimum optical link budget of 19db, corresponding to a minimum distance of 42km, assuming fiber loss of 0.35db/km. options ?h5?, ?h7? and ?h8? use 1550nm dfb lasers, and provide minimum optical link budgets of 21db, 22db and 24db respectively. each corresponds to minimum distances of 68km, 72km and 80km respectively, assuming fiber loss of 0.25db/km. all transceivers are class i laser products per u.s. fda/cdrh standards. the ?h3?, ?h5? and ?h7? transceivers are class i laser products while the ?h8? transceivers are class 1m laser products per international iec-825 standards. the dtr-1250-sm-gb-i transceivers are fully compliant with annex f of gbic specification, rev. 5.5 (except for higher tx optical power and 1550nm center wavelength option). the transceivers connect to standard 20-pad gbic connectors for hot plug capability. this allows the system designer to make configuration changes or maintenance by simply plugging in different types of gbics without removing the power supply from the host system. the transceivers operate from a single +5v power supply over an operating case temperature range of -5c to +70c. description optical communication products, inc. absolute maximum ratings features ; compliant with gbic specification, rev. 5.5 ; compliant with ieee 802.3z 1000base-lx specifications for gigabit ethernet (except for higher tx optical power and 1550nm center wavelength option) ; compliant with optical interface requirements in annex f of gbic specification, rev. 5.5 (except for higher tx optical power and 1550nm center wavelength option) ; compliant with gbic serial module definition protocol (module definition 4 in annex d) ; hot-pluggable ; four distance options with single mode fiber: 42km, 68km, 72km and 80km (please see note on distance in ordering information section) ; excellent emi & esd protection ; eye safe (class i or 1m laser safety) parameter symbol minimum maximum units storage temperature t st - 40 + 85 c operating case temperature t op - 5 + 70 c supply voltage v dd 0+ 6.0v input voltage v in 0 v dd v
2 21737-0390, rev. b 10-16-2003 transmitter performance characteristics (over operating case temperature, v cc = 4.75 to 5.25v) receiver performance characteristics (over operating case temperature, v cc = 4.75 to 5.25v) dtr-1250-sm-gb-i all parameters guaranteed only at typical data rate all parameters guaranteed only at typical data rate optical communication products, inc. date of manufacture: manufactured in the usa this product complies with 21 cfr 1040.10 and 1040.11 meets class i laser safety requirements laser safety : all transceivers are class i laser products per fda/cdrh standards. the h3, h5 and h7 transceivers are class i laser products while the h8 transceivers are class 1m laser products per iec-825 standards. they must be operated under specified operating conditions. parameter symbol minimum typical maximum units operating data rate 1 b -1250-mb/s minimum input optical power (10 -12 ber) 2 h3, h5 p min - 23.0 - - dbm h7, h8 - 24.0 - - maximum input optical power (10 -12 ber) 2 p max - 3.0 - - dbm rx_los thresholds increasing light input h3, h5 p los+ - - - 23.0 dbm h7, h8 - - - 24.0 decreasing light input p los- - 35.0 - - dbm rx_los hysteresis - 0.5 - - db deterministic jitter dj - - 170 ps total jitter tj --266ps wavelength of operation 1100 - 1600 nm optical return loss - 12 - - db stressed receiver sensitivity compliant with ieee 802.3z standard 1 data rate ranges from 125mb/s to 1300mb/s. however, some degradation may be incurred in overall performance. 2 measured with 2 7 -1 prbs at 1250mb/s at 1310nm for h3, 1550nm for h5, h7 and h8. parameter symbol minimum typical maximum units operating data rate 1 b - 1250 - mb/s optical output power 2 h3 p o - 4.0 - + 1.0 dbm h5, h7 - 2.0 - + 3.0 h8 0 - + 5.0 center wavelength h3 c 1280 1310 1335 nm h5, h7, h8 1500 1550 1580 spectral width (-20db) ? 20 --1.0nm extinction ratio p hi /p lo 9- -db transmitter disabled optical output power 2 p dis --- 35.0dbm deterministic jitter dj - - 80 ps total jitter tj --227ps relative intensity noise rin --- 120db/hz dispersion penalty 3 h5, h7 - --1.2 db h8 - - 1.5 transmitter output eye compliant with eye mask defined in ieee 802.3z standard 1 data rate ranges from 125mb/s to 1300mb/s. however, some degradation may be incurred in overall performance. 2 measured average power coupled into single mode fiber with 2 7 -1 prbs at 1250mb/s. 3 specified at 1360ps/nm (for h5), 1440ps/nm (for h7) and 1600ps/nm (for h8) dispersion, which corresponds to the approximate worst-case dispersion for 68km, 72km and 80km g.652/g.654 fiber respectively over the wavelength range of 1500 to 1580nm.
3 21737-0390, rev. b 10-16-2003 transmitter electrical interface (over operating case temperature, v cc = 4.75 to 5.25v) electrical power supply characteristics (over operating case temperature, v cc = 4.75 to 5.25v) dtr-1250-sm-gb-i parameter symbol minimum typical maximum units input voltage swing (+tx_dat & -tx_dat) 1 v pp-dif 0.65 - 2.0 v input high voltage (tx_disable) 2 v ih 2.0 - v dd + 0.3 v input low voltage (tx_disable) 2 v il 0-0.8v output high voltage (tx_fault) 3 v oh v cc - 0.5 - v cc + 0.3 v output low voltage (tx_fault) 3 v ol 0-0.5v 1 differential peak-to-peak voltage. 2 there is an internal 5.1k ? pull-up resistor to vddt . 3 open collector compatible, 4.7 to 10k ? pull-up resistor to vcc (host supply voltage). receiver electrical interface (over operating case temperature, v cc = 4.75 to 5.25v) module definition parameter symbol minimum typical maximum units output voltage swing (+rx_dat & -rx_dat) 1 v pp-dif 0.60 - 2.0 vp-p output high voltage (rx_los) 2 v oh v cc - 0.5 - v cc + 0.3 v output low voltage (rx_los) 2 v ol 0-0.5v 1 differential peak-to-peak voltage. 2 open collector compatible, 4.7 to 10k ? pull-up resistor to vcc (host supply voltage). module definition mod_def(0) pin 4 mod_def(1) pin 5 mod_def(2) pin 6 interpretation by host 4 ttl low scl sda serial module definition protocol pin assignments pin function pin function 1 rx_los (rx loss of signal) 11 rgnd (rx ground) 2 rgnd (rx ground) 12 -rx_dat (rx data out -) 3 rgnd (rx ground) 13 +rx_dat (rx data out +) 4 mod_def(0) 14 rgnd (rx ground) 5 mod_def(1) 15 vddr (rx supply voltage) 6 mod_def(2) 16 vddt (tx supply voltage) 7 tx_disable 17 tgnd (tx ground) 8 tgnd (tx ground) 18 +tx_dat (tx data in +) 9 tgnd (tx ground) 19 -tx_dat (tx data in -) 10 tx_fault 20 tgnd (tx ground) parameter symbol minimum typical maximum units supply voltage v dd 4.75 5.0 5.25 v supply current i dd - 200 270 ma
4 21737-0390, rev. b 10-16-2003 dtr-1250-sm-gb-i application notes connection of the gbic transceiver to the host system: the gbic?s 20-pad connector and two guide tabs connected to the transceiver?s circuit ground connect the gbic to the host system. the two ground tabs make contact to the host circuit ground before the connector pad and discharge any possible component-damaging static electricity. additionally, surge currents are eliminated by using a special slow start circuit and two-stage contact sequence where operational signals and grounds make contact prior to the power supply (as specified in the gbic specification, rev. 5.5). electrical interface: all signal interfaces are compliant with the gbic specification, rev. 5.5. the high speed data interface is differential ac-coupled and can be directly connected to either a 5v or 3.3v serdes ic. all low speed control and sense input/output signals are open collector ttl compatible and should be pulled up with a 4.7 - 10k ? resistor on the host board. loss of signal (los): the loss of signal circuit monitors the level of the incoming optical signal and generates a logic high when an insufficient photocurrent is produced. tx_fault: the output indicates low when the transmitter is operating normally, and high when the transmitter or laser current is excessive. tx_fault is an open collector/drain output and should be pulled up with a 4.7 - 10k ? resistor on the host board. tx_disable: when the tx_disable pin is at logic high, the transmitter optical output is disabled (less than -35dbm). serial identification: the dtr-1250-sm-gb-i transceivers are compliant with annex d (module definition 4) of the gbic specification, rev. 5.5, which defines the serial identification protocol. the module definition of gbic is indicated by the three module definition pins, mod_def(0), mod_def(1) and mod_def(2). module definition 4 specifies a serial definition protocol with a two-wire i 2 c serial interface; upon power up, mod_def(1:2) appear as nc (no connection), and mod_def(0) is ttl low. when the host system detects this condition, it activates the serial protocol and generates the serial clock signal (scl). the positive edge clocks data into the eeprom segments of the gbic that are not write protected, and the negative edge clocks data from the gbic. the serial data signal (sda) is for serial data transfer. the host uses sda in conjunction with scl to mark the start and end of serial protocol activation. the data transfer protocol and the details of the mandatory and vendor specific data structures are defined in annex d of the gbic specification, rev. 5.5. power supply and grounding: the power supply line should be well-filtered. all 0.1 f power supply bypass capacitors should be as close to the gbic transceiver module as possible. to 75 load ? gbic 18 2,3,8,9,11,14,17,20 19 7 +tx_dat scl vdd (5v) ttl low (internally connected to gnd) sda vcc (host) 15 5 46 +rx_dat + 1 h coil or ferrite bead (<0.2 series resistance) ? 10 0.1 13 12 -tx_dat tx_disable -rx_dat 16 0.1 + 10 + 10 10 1 0.1 4.7 - 10k ? 75 line ? rx_los tx_fault 75 line ? 75 line ? 75 line ? to 75 load ? 4.7 - 10k ? example of host board schematic
5 21737-0390, rev. b 10-16-2003 dtr-1250-sm-gb-i package outline 12.7 .500 8.18 .322 8.9 .35 10.06 -0.20 + 0.04 .396 - .008 +. 0 0 2 12 .472 58 max 2.28 max 13.54 max .533 max 3.05 0.05 .120 .002 guide slots width 27.7 1.09 guide slots height 1.63 -0.10 0 .064 - .004 + .000 pin 1 pin 10 pin 20 37.1 max 1.46 max 30.48 - 0.13 0 1.200 -.005 + .000 25.4 1.000 2x 1 .04 2x 1.27 -0.10 0 .050 - .004 + .000 + + dimensions in inches [mm] default tolerances: .xxx = + .005?, .xx = + .01? optical communication products, inc. reserves the right to make changes in equipment design or specifications without notice. i nformation supplied by optical communication products, inc. is believed to be accurate and reliable. however, no responsibility is assumed by optical communication products , inc. for its use nor for any infringements of third parties, which may result from its use. no license is granted by implication or otherwise under any patent right of optical communicatio n products, inc. optical communication products, inc. 6101 variel avenue, woodland hills, ca 91367, tel.: 818-251-7100, fax: 818-251-7111, www.ocp-inc.com ? 2003, optical communication products, inc. ordering information model name nominal wavelength optical link power b udget distance 1 DTR-1250-SM-GB-H3-I 1310nm 19db min. 42km 2 dtr-1250-sm-gb-h5-i 1550nm 21db min. 68km 3 dtr-1250-sm-gb-h7-i 1550nm 22db min. 72km 3 dtr-1250-sm-gb-h8-i 1550nm 24db min. 80km 3 1 the indicated transmission distance is for guidelines only, not guaranteed. the exact distance is dependent on the fiber loss, connector and splice loss, and allocated system penalty. longer distances can be supported if the optical link power budget is satisfied. 2 assuming a total connector and splice loss of 2db, total system penalty of 2db and fiber cable loss of 0.35db/km. 3 assuming a total connector and splice loss of 2db, total system penalty of 2db and fiber cable loss of 0.25db/km.
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