hutton close, crowther ind est, washington, tyne & wear ne38 0ah, england mailto:sales@isocom.uk.com - tel: +44 (0)191 4166546 - fax: +44 (0)191 4155055 circuit features description absolute maximum ratings electrical characteristics home page is74, ISD74, isq74 optically coupled isolator circuit is74 similar optocouplers ISD74 similar optocouplers isq74 similar optocouplers features 1500 v isolation high current transfer ratio 50% typical low cost dual-in-line package single, dual or quad configuration
description the ISD74 and isq74 is each an optically coupled isolator. each channel consists of a gallium arsenide infrared emitting diode and an npn silicon phototransistor mounted in a standard dual-in-line package. surface mount option available. all electrical parameters are 100% tested by manufacturing. specifications are guaranteed to a cumulative 0.65% aql. absolute maximum ratings (ta=25c) storage temperature: operating temperature: lead soldering: input-to-output isolation voltage: -55c to +150c -55c to +100c 260c for 10s, 1.6mm from case 1500vdc ( note 1 ) input diode forward dc current: reverse dc voltage: peak forward current: power dissipation: derate linearly: 60ma 3v 1a (p.w.=100s, duty ratio 0.001) 100mw 1.33mw/c above 25c output transistor collector-emitter voltage: power dissipation: 20v (is74, isq74) 30v (ISD74) 150mw 2.00mw/c above 25c package total power dissipation: derate linearly: 200mw (is74) 400mw (ISD74) 500mw (isq74) 6.67mw/c above 25c electro-optical characteristics (ta=25c)
input parameter conditions min typ max unit v f forward current i f =60ma 1.3 1.5 v i r reverse current v r =3v 10 a output bv ceo collector-emitter voltage i c =1ma 20 45 v i ceo collector-emitter dark current v ce =5v 3 500 na coupled i c /i f dc current transfer ratio i f =16ma, v ce =5v 12.5 50 % v ce(sat) collector-emitter saturation voltage i f =16ma, i c =2.0ma 0.3 0.5 v c f floating capacitance v=0, f=1mhz 0.6 1 pf input-output isolation resistance v io =500v, (note 1) 500 gohm notes 1. measured with input leads shorted together and output leads shorted together. isocom takes great effort to ensure accurate data, but regrettably cannot be held liable for any error on its website. visit file lists to confirm old printouts are up-to-date. contents
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