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From: Boris Mohar
Subject: Re: japanese transistor
X-Newsreader: Forte Agent 1.92/32.572
Date: Sun, 08 Dec 2002 12:31:26 -0500
NNTP-Posting-Date: Sun, 08 Dec 2002 12:32:30 EST
Organization: Bell Sympatico
On Sun, 08 Dec 2002 16:27:09 GMT, Spehro Pefhany
>On Sun, 08 Dec 2002 11:05:57 -0500, the renowned Boris Mohar
>>I just got bitten by BC546 The pinout is reverse ordered when compared to
>>"standard" TO92. Why mr. Phillips? Why?
>What is sacred about the US-standard layout?
Nothing. Hence the quote marks. It is just that most of the TO92 follow
the same pinout. Than again in I did not take a world pool on that.
> Actually the Japanese one makes more sense to me, what with the collector on the middle part of
>the leadframe. Like SMT BJTs.
Actually since in the schematic the base it in the middle it would make
more intuitive sense to me that the base of the real part be in the
middle. This is not efficient packaging for higher power devices where
every nano henry and milliohm make the difference.
Likewise we have Motorola MPSH series (MPSH20) with the emitter in the
center. These are RF transistors and no doubt they had a good reason.
Don't bother looking them up on Motorola website. They are probably
obsolete. When Motorola obsoletes a product they deny all knowledge of it
having ever existed.
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