isocom components ltd unit 25b, park view road west, park view industrial estate, brenda road hartlepool, cleveland, ts25 1yd tel: (01429) 863609 fax :(01429) 863581 isocom inc 720 e., park boulevard, suite 104, plano, tx 75074 usa tel: (972) 423-5521 fax: (972) 422-4549 3/10/97 db92072-aas/a2 iso - logic buffer schmitt trigger interrupter switch ISTS970N, ists971n ists970t, ists971t optical centre line 12.7 e 3.0 1 2 5 4 9.0 8.0 11.1 10.5 0.45 0.40 7.62 6.6 3.3 3.0 2.8 2.54 dimensions in mm 3 1 2 pin 5 g nd pin 3 v cc pin 4 v o optic al centre line 12.7 e 3.0 1 2 5 4 9.0 8.0 11.1 10.5 0.45 0.40 7.62 6.6 3.3 3.0 2.8 2.54 3 1 2 pin 3 v cc pin 4 v o 25.7 24.1 19.05 pin 5 g nd ISTS970N ists971n ists970t ists971t voltage regulator 4 out 3 v cc 5 g nd 10k w amp ists970 only 1 2 description the ists970 and ists971 series of transmissive photointerrupters are single channel switches consisting of a gallium arsenide infrared emitting diode coupled to a high speed integrated circuit detector. the output incorporates a schmitt trigger which provides hysteresis for noise immunity and pulse shaping. the gap in the plastic housing provides a means of interrupting the signal with an opaque material, switching the output from an 'off' into an 'on' state. features l output high under incident light l built in schmitt trigger circuit l pull up resistor between v cc and output (ists970) l open collector output (ists971) l high sensitivity l 3mm gap between led and detector l 1mm aperture over detector applications l floppy disk drives, copiers, printers, facsimilies, vcr's, cassette tape recorders, automatic vending machines
db92072-aas/a2 parameter min typ max units test condition input forward voltage (v f ) 1.1 1.7 v i f = 20ma reverse voltage (v r )6vi r = 10 m a reverse current (i r )10 m av r = 3v detector operating voltage range v cc 4.75 5.25 v low level supply current i ccl 2.0 15 ma v cc = 5.25v, i f = 0ma high level supply current i cch 1.0 15 ma v cc = 5.25v, i f = 15ma low level output voltage v ol 0.4 v v cc = 4.75v, i f = 0ma i ol = 12.8ma high level output voltage v oh ists970 2.4 v v cc = 4.75v, i f = 15ma i oh = -800 m a high level output current i oh ists971 100 m av cc = 4.75v, i f = 15ma v oh = 30v input forward threshold current i ft 15 ma v cc = 5v propagation delay time to logic high at output t plh 5 m s propagation delay time v cc = 5v to logic low at output t phl 5 m si f = 15ma r l = 360 w (ists971) rise time tr 0.1 m sor r l = 8ttl loads (ists970) fall time tf 0.05 m s note 1 special selections are available on request. please consult the factory. 3/10/97 electrical characteristics ( t a = 25c unless otherwise noted ) absolute maximum ratings (25 c unless otherwise specified) storage temperature -40c to +85c operating temperature -25c to +85c lead soldering temperature 260c (5 secs maximum) infrared emitting diode power dissipation 75 mw forward current ( continuous ) 50 ma forward current ( peak ) 1 a (pulse width 100 m s, duty ratio = 0.01) reverse voltage 6v photo detector power dissipation 250 mw output current 50ma allowed range v 35 (ists970) 0 to 17v (ists971) 0 to 35v allowed range v 45 (ists970) 0 to 17v (ists971) 0 to 40v
db92072-aas/a2 3/10/97 50 -25 0 25 50 75 100 125 ambient temperature t a ( c ) 0 300 collector power dissipation p c (mw) collector power dissipation vs. ambient temperature 0 1.0 2.0 3.0 v cc = 5.25v ambient temperature t a ( c ) -25 0 25 50 75 100 -25 0 25 50 75 100 ambient temperature t a ( c ) low level output voltage v ol ( v ) low level output voltage vs. ambient temperature 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1 low level output voltage v ol ( v ) low level output voltage vs. low level output current low level output current i ol ( ma ) 0.1 0.01 0.02 0.2 0.5 supply current vs. ambient temperature supply current i cc (ma) v cc = 4.75v i f = 0ma t a = 25c 0.1 0.2 0.5 1 2 5 10 0 0.1 0.2 0.3 0.4 rise time, fall time tr, tf ( m s) rise time, fall time vs. load resistance load resistance r l ( k w) 0.5 ambient temperature t a ( c ) 60 30 20 10 0 40 50 -25 0 25 50 75 100 125 forward current vs. ambient temperature forward current i f (ma) 100 150 200 250 1 10 50 100 0.05 v cc = 4.75v i f = 15ma t a = 25c 0.6 i cch i ccl v cc = 5.25v i f = 0ma i ol = 30ma 5ma 16ma tf tr
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