ampson technology, inc. APRX178LT 1/7 3/6/2003 rev.1.0 fiber optic receiving module features 1) conform to eiaj standard cp-1201 (for digital audio interfaces including fiber optic inter-connections). 2) a self-tapping hole for easy attachment to audio equipments panels. 3) +5v single power supply. 4) high speed signal receiving (6m nrz signal). 5) esd tolerance ic > 8kv. 6) standard package (panel mount type). applications 1) digital audio equipment. 2) navigation system. maximum ratings (ta=25 o c) parameter symbol rating units storage temperature tstg -40 ~ 70 o c operating temperature topr -20 ~ 70 o c supply voltage vcc -0.5 ~ 7 v high level output current i oh -1 ma low level output current i ol 5 ma soldering temperature t sol 260 *1 o c *1:soldering time 10 seconds (at a distance of 1mm from the package). ordering information a p r x 1 7 8 l t r:receiver t:transmitter l: shutter type
ampson technology, inc. APRX178LT 2/7 3/6/2003 rev.1.0 recommended operating conditions and electrical characteristics (ta=25 o c , vcc=5v) characteristic symbol condition min typ max units supply voltage vcc 4.75 5.0 5.25 v data rate t nrz code *1 0.1 - 6 mb/s peak detective wavelength p - 660 - nm transmission distance using apf *2 using aptx178 0.2 - 5 m pulse width distortion *3 ? tw pulse width = 160ns pulse cycle = 320ns c l = 10pf using aptx178 -25 - 25 ns maximum receivable power p max 6mb/s, using apf *2 -14.5 - - dbm minimum receivable power p min 6mb/s, using apf *2 - - -24 dbm current consumption i cc vcc=+5v - 22 40 ma high level output voltage v oh 3.6 4.0 - v low level output voltage v ol - 0.2 0.4 v *1: when non-modulated signal (optical all high or all low level signal) is inputted, output signal is not stable. when modulated optical high level signal is received, output signal is high. when modulated optical low level signal is received, output signal is low. the duty factor must be maintained between 25 to 75%. *2: apf:all plastic fiber (970/1000m). length 1 meter. *3: between input of transmitting module and output of aprx178. mechanical characteristics (ta=25 o c) characteristic symbol condition min typ max units insertion force *1 - - 40 n withdrawal force *1 6 - 40 n torque for self-tap using self-tapping screw (m3*8) 60 - 100 n-cm *1: using standard optical fiber cable. (970/1000 um)
ampson technology, inc. APRX178LT 3/7 3/6/2003 rev.1.0 application circuit fiber optic receiving module 1 3 2 output gnd vcc (botton view) 0.1 f 47 h less than 7mm fiber optic connector insertion side block diagram amp amp amp amp comp & output circuit 3 2 1 pin connection: 1 vout 2 gnd 3 vcc
ampson technology, inc. APRX178LT 4/7 3/6/2003 rev.1.0 test circuit unit to be measured gnd vcc vin vcc input standard transmitter ch2 ch1 oscilloscope input signal t plh t phl 50% 50% receiver output output signal stand optical fiber cable (1 meter) tjr tjf 6mb/s nrz comments no. test item symbol 1 low to high pulse delay time t plh 2 high to low pulse delay time t phl 3 pulse width distortion ? tw = t phl - t plh ? tw 4 high level output voltage v oh 5 low level output voltage v ol
ampson technology, inc. APRX178LT 5/7 3/6/2003 rev.1.0 APRX178LT outline dimension unit: mm recommended drilling as viewed from the soldering face
ampson technology, inc. APRX178LT 6/7 3/6/2003 rev.1.0 precautions during use 1) maximum rating the maximum ratings are the limit values which must not be exceeded during operating of device. none of these rating value must not be exceeded. if the maximum rating value is exceeded, the characteristics of devices may never be restored properly. in extreme cases, the device may be permanently damages. 2) soldering optical modules are comprised of internal semiconductor devices. however, in principle, optical modules are optical components. during soldering, ensure that flux dose not contact with the emitting surface or detecting surface. also ensure that proper flux removal is conducted after soldering. some optical modules come with protective cap. the protective cap is used to avoid malfunction when the optical module is not in use. note that it is not dust or waterproof. as mentioned before, optical modules are optical components. thus, in principle, soldering where there may be flux residue or flux removal after soldering is not recommended. ampson recommends that soldering be performed without the optical module mounted on the board. then, after the board has been cleaned, the optical module should be soldered on to the board manually. if the optical module cannot be soldered manually, use non-halogen (chlorine-free) flux and make sure, without cleaning, there is no residue such as chlorine. this is one of the ways to eliminate the effects of flux. in such a cases, be sure to check the devices? reliability. 3) noise resistance it is believed that the use of optical transfer devices improve noise resistance. in theory, optical fiber is not affected by noise at all. however, receiving modules which handle signals whose level is extremely small, are susceptible to noise. the optical module is to be used in an area which is susceptible to radiated noise, increase the shielding by covering the optical module and the power line filter with a meta llic cover. 4) vibration and shock this module is plastic sealed and has its wire fixed by resin. this structure is relatively resistant to vibration and shock. in actual equipment, there are sometimes cases in which vibration, shock, and stress is applied to soldered parts or connected parts, resulting in lines cut. a care must be taken in the design of equipment which will be subject to high levels of vibration. 5) support pins the aprx178xx has support pins in order to fix itself to the pcb temporary. please make the hole for these pins in the pcb under the condition described in board layout hole pattern. 6) panel attachment aprx178xx has hole for panel attachment. please be sure to attach it to panel with self-tapping screw.
ampson technology, inc. APRX178LT 7/7 3/6/2003 rev.1.0 7) solvent when using solvent for flux removal, do not use a high acid or high alkali solvent. be careful not to pour solvent in the optical connector ports. if solvent is inadvertently poured in to them, clean it off using cotton tips. 8) protective cap when the aprx178xx is not in use, attach the protective cap. 9) supply voltage use the supply voltage within the recommended operating condition (vcc = 5 0.25v). make sure that supply voltage does not exceed the maximum rating value of 7v, even for an instant. 10) interface the aprx178xx has a ttl interface. it can be interfaced with any ttl-compatible c-mos ic. 11) output if the receiver output is at low and is connected to the power supply, or if the output is high and is connected to gnd, the internal ic may be destroyed. 12) soldering condition solder at 260 o c or less for no more than ten seconds. 13) precautions when disposing of devices and packing materials. when discarding devices and packing materials, follow the procedures stipulated by local regulations in order to protect the environment against contamination. 14) precautions during use ampson is continually working to improve the quality and the reliab ility of their pr oducts. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the res ponsib ility of the buyer, w hen ut ilizing ampson pr oducts, to observe standards of safety, and to avoid situations in which the malfunction or failure of a ampson product could cause loss of human life, bodily injury or damage to property.
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