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155 mb/s single mode laser transceiver for atm, sonet oc-3/sdh stm-1 (l1.1) technical data HFCT-5215B/d features ? sc duplex single mode transceiver long reach sonet oc3 sdh stm1 (l1.1) compliant single +5 v power supply multisourced 1 x 9 pin package style aqueous washable plastic package interchangeable with led multisourced 1 x 9 transceivers unconditionally eye safe laser iec 825/cdrh class 1 compliant applications atm 155 mb/s links sonet oc-3/sdh stm-1 interconnections description the hfct-5215 transceiver is a high performance, cost effective module for serial optical data communications applications specified for a signal rate of 155 mbd. it is designed to provide a sonet/sdh compliant link for 155 mb/s long reach links. this module is designed for single mode fiber and operates at a nominal wavelength of 1300 nm. it incorporates agilent?s high performance, reliable, long wavelength optical devices and proven circuit technology to give long life and consistent service. the transmitter section uses a multiple quantum well laser with full iec 825 and cdrh class i eye safety. the receiver section uses a planar pin photodetector for low dark current and excellent responsivity. a pseudo-ecl logic interface simplifies interface to external circuitry.
2 connection diagram pin descriptions: pin 1 receiver signal ground v ee : directly connect this pin to the receiver ground plane. pin 2 receiver data out rd+: see recommended circuit schematic, figure 4. pin 3 receiver data out bar rd-: see recommended circuit schematic, figure 4. pin 4 signal detect sd: normal optical input levels to the receiver result in a logic ?1? output. low optical input levels to the receiver result in a fault condition indicated by a logic ?0? output. this signal detect output can be used to drive a pecl input on an upstream circuit, such as signal detect input or loss of signal-bar. pin 5 receiver power supply v cc : provide +5 v dc via the recommended transmitter power supply filter circuit. locate the power supply filter circuit as close as possible to the v cc pin. pin 6 transmitter power supply v cc : provide +5 v dc via the recommended transmitter power supply filter circuit. locate the power supply filter circuit as close as possible to the v cc pin. pin 7 transmitter data in bar td-: see recommended circuit schematic, figure 4. pin 8 transmitter data in td+: see recommended circuit schematic, figure 4. pin 9 transmitter signal ground v ee : directly connect this pin to the transmitter ground plane. mounting studs the mounting studs are provided for mechanical attachment to the circuit board. they are embedded in the nonconductive plastic housing and are not tied to the transceiver internal circuit and should be soldered into plated-through holes on the printed circuit board. receiver signal ground receiver data out receiver data out bar signal detect receiver power supply transmitter power supply transmitter data in bar transmitter data in transmitter signal ground o o o o o o o o o 1 2 3 4 5 6 7 8 9 top view n/c n/c
3 functional description receiver section design the receiver section contains an ingaas/inp photo detector and a preamplifier within the receptacle, coupled to a postamp/decision circuit on a separate circuit board. the postamplifier is ac coupled to the preamplifier as illustrated in figure 1. the coupling capacitor is large enough to pass the sonet/sdh test pattern at 155 mbd without significant distortion or performance penalty. if a lower signal rate, or a code which has significantly more low frequency content is used, sensitivity, jitter and pulse distortion could be degraded. figure 1 also shows a filter network which limits the bandwidth of the preamp output signal. the filter is designed to bandlimit the preamp output noise and thus improve the receiver sensitivity. these components will also reduce the sensitivity of the receiver as the signal bit rate is increased above 155 mbd. noise immunity the receiver includes internal circuit components to filter power supply noise. under some emi and power supply noise conditions, external power supply filtering may be necessary. if receiver sensitivity is degraded by power supply noise, the filter network illustrated in figure 2 may be employed to improve performance. the values of the filter components are general recommendations and may be changed to suit a particular system environment. shielded inductors are recommended. terminating the outputs the pecl data outputs of the receiver may be terminated with the standard thevenin-equivalent 50 ohm to v cc - 2 v termination. other standard pecl terminating techniques may be used. the two outputs of the receiver should be terminated with identical load circuits to avoid unnecessarily large ac current in v cc . if the outputs are loaded identically the ac current is largely nulled. the signal detect output of the receiver is pecl logic and must be loaded when used. the signal detect circuit is much slower than the data path, so the ac noise generated by an asymmetrical load is negligible. power consumption may be reduced by using a higher than normal load impedance for the signal detect output. transmission line effects are not generally a problem as the switching rate is slow. the signal detect circuit the signal detect circuit works by sensing the peak level of the received signal and comparing this level to a reference. receiver receptacle trans- impedance pre- amplifier filter gnd limiting amplifier pecl output buffer pecl output buffer data out signal detect circuit sd data out figure 1 - receiver block diagram figure 2 - filter network for noise filtering v cc 10 f 3.3 h 100 nf 100 nf filtered v cc to data link
4 functional description transmitter section design the transmitter section, figure 3, uses a multiple quantum well laser as its optical source. the packaging of this laser is designed for repeatable coupling into single mode fiber while maintaining compliancy with iec 825 class 1 and cdrh class i eye safety requirements. the optical output is controlled by a custom ic which detects the laser output via the monitor photodiode. this ic provides both dc and ac current drive to the laser to ensure correct modulation, eye diagram and extinction ratio over temperature, supply voltage and life. pcb mounting the hfct-5215 has two solderable mounting studs. these studs are not electrically connected. the transceiver is designed for common production processes. it may be wave soldered and aqueous washed providing the process plug is in place. each process plug can only be used once during processing, although with subsequent use, it can be used as a dust cover. figure 3 - simplified transmitter schematic data data pecl input laser modulator laser laser bias driver laser bias control photodiode (rear facet monitor)
5 no internal connection no internal connection top view rx v ee 1 rd 2 sd 4 rx v cc 5 tx v cc 6 td 8 tx v ee 9 notes: the split-load terminations for ecl signals need to be located at the input of devices receiving those ecl signals. recommend 4-layer printed circuit board with 50 w microstrip signal paths be used. r1 = r4 = r6 = r8 = 130 w r2 = r3 = r5 = r7 = 82 w r10 = 10 k w c1 = c2 = c5 = c6 = 0.1 f. c3 = c4 = 10 f. c7 = c8 = 100 nf. l1 = l2 = 3.3 h coil or ferrite inductor. terminate at the device inputs v cc filter at v cc pins transceiver v cc c8 c1 l1 l2 td rd 3 td 7 r8 rd rd v cc r5 r7 r6 c6 sd r10 c7 c2 c3 c4 r4 v cc r2 r3 r1 termination at transceiver inputs td c5 figure 4 - recommended circuit schematic regulatory compliance feature test method performance electrostatic discharge (esd) to the electrical pins mil-std-883c method 3015.4 class 1 (>1 kv) - human body model electrostatic discharge (esd) to the duplex sc receptacle variation of iec 801-2 products of this type, typically, withstand at least 25 kv without damage when the duplex sc connector receptacle is contacted by a human body model probe. electromagnetic interference (emi) fcc class b cenelec en55022 class b (cispr 22a) vcci class 1 typically provide a 17 db margin to the noted standard limits up to 6 ghz, when tested in a gtem cell with the transceiver mounted to a circuit card with a chassis enclosure. immunity variation of iec 801-3 typically show no measurable effect from a 10 v/m field swept from 10 to 450 mhz applied to the transceiver without a chassis enclosure. eye safety fda cdrh 21-cfr 1040 class i cdrh accession number: license pending iec 825 issue 1 1993:11 class 1 cenelec en60825 class 1 tuv bauart license: 933/510918/01
6 performance specifications absolute maximum ratings stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. limits apply to each parameter in isolation, all other parameters having values within the recommended operating conditions. it should not be assumed that limiting values o f more than one parameter can be applied to the product at the same time. exposure to the absolute maximum ratings for extended periods can adv ersely affect device reliability. operating environment transmitter section (ambient operating temperature v cc = 4.75v to 5.25v) notes: 1. output power is power coupled into a single mode fiber. 2. the power supply current varies with temperature. maximum current is specified at v cc = maximum @ maximum temperature (not including terminations) and end of life. 3. 10% - 90% values 4. these inputs are compatible with 10k, 10kh and 100k ecl and pecl inputs. parameter symbol minimum maximum units notes output center wavelength l c 1280 1335 nm - output spectral width (rms) dl -4.0nm- average optical output power p o -5 0 dbm 1 extinction ratio e r 10 - db - power supply current i cc - 140 ma 2 output eye compliant with bellcore tr-nwt-000253 and itu recommendation g.957 optical rise time t r -2ns3 optical fall time t f -2ns3 data input current - low i il -350 - a - data input current - high i ih - 350 a - differential input voltage v ih - v il 300 - mv - data input voltage - low v ol - v cc -2.0 -1.58 v 4 data input voltage - high v oh - v cc -1.1 -0.74 v 4 parameter symbol minimum maximum units storage temperature t s -40 +85 c operating temperature - 0 +70 c lead soldering temperature/time - - +240/10 c/s output current (other outputs) i out 030ma input voltage - gnd v cc v power supply voltage - 0 +6 v parameter symbol minimum maximum units power supply voltage v cc +4.75 +5.25 v ambient operating temperature t op 0+70 c
7 receiver section (ambient operating temperature v cc = 4.75v to 5.25v) notes: 5. minimum sensitivity and saturation levels for a 2 23 -1 prbs with 72 ones and 72 zeros inserted. (itu-t recommendation g.958). 6. the current excludes the output load current. 7. these outputs are compatible with 10k, 10kh and 100k ecl and pecl outputs. parameter symbol minimum typical maximum units notes receiver sensitivity - - - -31 dbm 5 maximum input power - -8 - - dbm - signal detect - asserted p a p d +0.5 - -31 dbm avg. - signal detect - deasserted p d -43 - - dbm avg. - signal detect - hysteresis p a - p d 0.5 - 4.0 db - power supply current i cc -80100ma 6 data output voltage - low v ol - v cc -2.0 - -1.58 v 7 data output voltage - high v oh - v cc -1.1 - -0.74 v 7 signal detect output voltage - low v ol - v cc -2.0 - -1.58 v 7 signal detect output voltage - high v oh - v cc -1.1 - -0.74 v 7
8 figure 5. package outline drawing for hfct-5215 max. +0.1 -0.05 +0.004 -0.002 0.25 ( 0.010 3.3 0.38 (0.130 0.015) 9.8 (0.386) 0.51 (0.020) ) 8x ) 9x ? 2x ? ) 2x ? +0.25 -0.05 +0.010 -0.002 0.46 ( 0.018 23.8 (0.937) 20.32 (0.800) 2.54 (0.100) 1.3 (0.051) 20.32 (0.800) 20.32 (0.800) 15.8 0.15 (0.622 0.006) +0.25 -0.05 +0.010 -0.002 1.27 ( 0.050 dimensions are in millimeters (inches). tolerances: x.xx 0.025 mm x.x 0.05 mm unless otherwise specified. 39.6 (1.56) max. max. slot depth xxxx-xxxx zzzzz laser prod 21cfr(j) class 1 country of origin yyww tx rx slot width key: yyww = date code xxxx-xxxx = hfct-5215 zzzz = 1300 nm 12.7 (0.50) 25.4 (1.00) 2.5 (0.10) 4.7 (0.185) 2.0 0.1 (0.079 0.004) 12.7 (0.50) area reserved for process plug agilent drawing dimensions
9 figure 6 . recommended board layout pattern 20.32 (0.800) top view 2 x ? 1.9 0.1 (0.075 0.004 20.32 (0.800) 2.54 (0.100) 9 x ? 0.8 0.1 (0.032 0.004 d i m e n s i o n s a r e i n m i l l i m e t e r s ( i n c h e s )
10 ordering information temperature range 0 c to +70 c HFCT-5215B black case hfct-5215d blue case supporting documentation application note 1098 characterization report qualification report handling precautions 1. the hfct-5215 can be damaged by current surges or overvoltage. power supply transient precautions should be taken. 2. normal handling precautions for electrostatic sensitive devices 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: agilent technologies ltd., depot road, singapore
www.semiconductor.agilent.com data subject to change. copyright ? 2000 agilent technologies, inc. obsoletes: 5968-9458e (02/00) 5968-9458e (03/00)

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