<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I had this question recently, too, and was pointed to the TLP2361. I has a push pull output and runs at 3.3V. I believe it is soic-6 sized. <div class=""><br class=""></div><div class=""><a href="https://www.digikey.com/product-detail/en/TLP2361(E/TLP2361(E-ND/5189881?utm_campaign=buynow&WT.z_cid=ref_octopart_dkc_buynow&utm_medium=aggregator&curr=usd&site=us&utm_source=octopart" class="">https://www.digikey.com/product-detail/en/TLP2361(E/TLP2361(E-ND/5189881?utm_campaign=buynow&WT.z_cid=ref_octopart_dkc_buynow&utm_medium=aggregator&curr=usd&site=us&utm_source=octopart</a><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 5, 2018, at 2:34 PM, Byron G. Jacquot <<a href="mailto:thescum@surfree.com" class="">thescum@surfree.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><blockquote type="cite" class="">I remember reading a long time ago that opto couplers are that big because <br class="">the innards actually require that much volume. I could be wrong though.<br class=""></blockquote><br class="">Having smashed a few open, most of the volume is plastic, or ceramic, or whatever the packaging material is.<br class=""><br class=""><a href="https://cdn.sparkfun.com/assets/learn_tutorials/4/0/8/opto-internal-labeled.png" class="">https://cdn.sparkfun.com/assets/learn_tutorials/4/0/8/opto-internal-labeled.png</a><br class=""><br class="">-Byron Jacquot<br class="">_______________________________________________<br class="">Synth-diy mailing list<br class="">Synth-diy@synth-diy.org<br class="">http://synth-diy.org/mailman/listinfo/synth-diy<br class=""></div></div></blockquote></div><br class=""></div></div></body></html>