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They will be very well matched and also held at the same temperature.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Synth-diy <synth-diy-bounces@synth-diy.org> on behalf of Pete Hartman via Synth-diy <synth-diy@synth-diy.org><br>
<b>Sent:</b> 15 September 2023 19:34<br>
<b>To:</b> SDIY List <synth-diy@synth-diy.org><br>
<b>Subject:</b> Re: [sdiy] What do people use for matched transistors these days?</font>
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<div dir="ltr">Hm.
<div>- can these still apply the same logic of "two transistors on the same strip are probably close enough" ?</div>
<div>- I'm curious what the use case is for a dual transistor where they're not matched.... I mean these cases are a *little* smaller than two individual SOT-23's but there are also smaller packages that could be used.<br>
<br>
Pete</div>
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<div dir="ltr" class="x_gmail_attr">On Fri, Sep 15, 2023 at 11:56 AM Neil Johnson via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br>
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Hi,<br>
<br>
Mike Bryant wrote:<br>
> Nxperia also do dual transistors without the base resistors e.g. BC856S. They are on the same die so will be well matched.<br>
<br>
Umm, no, they're not, according to Nexperia:<br>
<br>
"these dual are all 2 die solution where we take them from the same wafer.<br>
No plans to develop these parts using a single die unfortunately since<br>
the main goal is to maximize volumes of the single die version."<br>
<br>
A shame as it would be a great option to replace the long-gone<br>
2SC1583, etc. I remember years ago asking Philips about the PUMX1 and<br>
got a similar response:<br>
<a href="http://synth-diy.org/pipermail/synth-diy/2001-April/013380.html" rel="noreferrer" target="_blank">http://synth-diy.org/pipermail/synth-diy/2001-April/013380.html</a><br>
<br>
Neil<br>
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