ampson technology, inc. APTX179M 1/4 12/20/2002 rev.1.0 fiber optic transmitting module features 1) conform to eiaj standard cp-1201 (for digital audio interfaces including fiber optic inter-connections). 2) ttl interface. 3) led is driven by differential circuit. 4) +2.7v ~ +5.5v single power supply. 5) high speed signal transmission (12.5m nrz signal). 6) esd tolerance ic > 8kv. applications 1) digital audio equipment. 2) navigation system. maximum ratings (ta=25 o c) characteristic symbol rating units supply voltage vcc -0.5 to 7 v input voltage v in -0.5 to vcc+0.5 v operating temperature topr -20 to 70 o c storage temperature tstg -30 to 80 o c
ampson technology, inc. APTX179M 2/4 12/20/2002 rev.1.0 recommended operating conditions and electrical characteristics (ta=25 o c , vcc=5v) characteristic symbol condition min typ max units operating voltage vcc 2.7 3 5.5 v operating current iop - 8 13 ma transmitter wavelength p - 660 - nm transmitter light power pf *1 -21 - -15 dbm data rate t nrz code *2 dc - 12.5 mb/s pulse width distortion tw pulse width 80ns pulse cycl e 160ns, c l =10pf using aprx179 -25 - 25 ns jitter tj - 4 25 ns low to high delay time t plh - 100 180 ns high to low delay time t phl - 100 180 ns high level input voltage v ih 2.0 - - v low level input voltage v il - - 0.8 v high level input current i ih - - 20 a low level input current i il - - -0.4 ma *1: fiber insertion measure peak value. *2: for data rate > 12mb/s(nrz), the duty factor must be such as kept 25 to 75%. block diagram ttl buffer amp in vcc led driver
ampson technology, inc. APTX179M 3/4 12/20/2002 rev.1.0 test circuit unit to be measured gnd vcc vin vcc input 12.5mb/s nrz, duty 50% standard receiver ch2 ch1 oscilloscope input signal t plh t phl 50% 50% standard receiver output output signal stand optical fiber cable (1 meter) tjr tjf 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. APTX179M 4/4 12/20/2002 rev.1.0 APTX179M outline dimension unit: mm
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