<div dir="ltr">For whatever reason, I can't see the image.<div><br></div><div>Could it be an OPA541? Seems to fit the bill.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 31 May 2016 at 11:42, Michael Zacherl <span dir="ltr"><<a href="mailto:sdiy-mz01@blauwurf.info" target="_blank">sdiy-mz01@blauwurf.info</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hi, in some hand written docs from 1971 (part of a legacy) I found a circuit using a chip labelled “514 TEXAS INST”.<div>The application is an audio volume controller, the circuit itself is nothing special, I’d say.</div><div><br></div><div>The schematic looks familiar, but what’s that chip?</div><div>Below is a reproduction of this IC’s internal circuit, </div><div>from a pencil drawn reproduction of the datasheet diagram (I presume) also in this docs.</div><div><br></div><div>The components are not labelled, the terminals named like below and not numbered.</div><div><br></div><div>Anyone came across this “514” part back then?</div><div><br></div><div><img height="457" width="510"></div><div><br></div><div>Thanks, Michael.</div><div><div><br></div></div><div><div style="color:rgb(0,0,0);font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word;font-family:Helvetica"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;font-size:13px;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div>--</div></span></div></span></div></span></div></span></div></span></div></span></div><span style="color:rgb(0,0,0);font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;border-collapse:separate;font-family:Helvetica;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;font-size:13px;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;border-spacing:0px"><a href="http://mz.bluemole.com" target="_blank">http://mz.bluemole.com</a></span></div></span></div></span></div></span></div></span></div></span></div></span>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">/Ove<br><br>Blog: <<a href="http://blog.gg8.se/" target="_blank">http://blog.gg8.se/</a>><br><br>"Here is Evergreen City. Evergreen is the color of green forever."<br></div>
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