[sdiy] Dual NPN transistors

[houshu at dsp.cl.nec.co.jp]

Hello Neil,

About 20 years ago, I used 2SC2259 for 2SC1583 in exp converter, and
had no trouble.  Both were produced by Mitsubishi, but are now
discontinued and rare even in Japan.  

2SC2259 is for higher voltage applications.  It has smaller hfe (about
100) than 2SC1583 (usually over 200).  When I can get 1583, I'd not
use 2259.

In Japan, 2SC3381 (Toshiba) is popular for new disign.

http://www.semicon.toshiba.co.jp/seek/us/td/99kataban/20014.htm

It is in production, and its hfe is high.  Because terminals are
separate, it can be used not only for exp converter but for transistor
ladder.  By bending pins, it'll fit pcbs for 2SC1583.

Regards,

Osamu Hoshuyama

> Date:    Tue, 17 Apr 2001 12:55:50 JST
> To:      synth-diy <synth-diy at node12b53.a2000.nl>
> 
> While designing the expo for my little VCO I'm looking at using a dual NPN
> device, like the 2SC1583.  I've also come across the 2SC2259 as an
> "equivalent".  Anyone come across this device??  Does anyone have other
> equivalents??
> 
> Browsing the around the web they both seem quite cheap, with the 2SC2259
> possibly being *slightly* cheaper.  Although I think the 2SC2259 is a
> discontinued part, unless someone knows otherwise.
> 
> Also found another, possibly useful, equivalents site:
> 
> 	http://elektronline.hypermart.net/xref/kereso.htm
> 
> It's in Hungarian (I think) but that doesn't detract from the information
> contained within.  Seems quite comprehensive too.
> 
> Cheers,
> Neil
> 
> --
> Neil Johnson :: Computer Laboratory :: University of Cambridge ::
>   http://www.cl.cam.ac.uk/~nej22           +44 (0) 1223 334 477
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 Osamu HOSHUYAMA                    NEC Corporation  Kawasaki JAPAN
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