> >Unless prices are << Digikey I'd recommend looking at what eg
> >CETSemi can offer.
> >I use their SOT23 NChannel CES2310 at under 10 cents.

> I appreciate the suggestion and will check them out. =A0Its worth
> having other low-cost NOSFETs handy.

> Speaking of 'Asian inexpensive', what suppliers can you suggest that
> would be appropriate for North American companies to deal with?

I mentioned CETSemi because I am extremely pleased with the one
product I use AND a local supplier has been promoting their wqares,
even though I've not seen then advertised usually locally.

Parametric search here     http://www.cetsemi.com/index-e.htm

A look for PFets around your spec turned up the CEM2163 in SO8. Ids
8.9A, Rdson 30 mohm at Vgs=3D2.5V and 20 mohm at Vgs =3D 4.5V.
Alas data sheet not found but similar  CEM2187 dual is there
http://web2.cetsemi.com/PDF/SO-8-P/M2187.PDF

And slightly inferior CES2331 in SOT23
          http://web2.cetsemi.com/PDF/SOT-23/S2331.PDF
looks excellent and is probably under 10 cents.
mohm at Vgs =3D 48/60/78 at -1.8/2.5/4.5 V (max in each case, typical is ~7=
5%)
Idsmaxcont -4.2A and peak -15A

Most international suppliers are available in China (not surprisingly)
with parts often being locally made.

LRC (Leshan Radio Comp[any) makes a subset of OMSemi parts and is part
owned by ON Semi and is usually well priced.

I pay around 1 cent for top  SOT23 jellybean transistors eg BC807 from
top gain (beta) bin and amongst the top Ice rating of SOT23's before
you go to zetex and similar.

A Taiwanese transistor maker whose name escapes me but I could dig it
out make 8050/8055 TO92 complementary pair with equally good SOT23
variant with 1+ amp ratings at high beta - very Zetex like but I
haven't seen them here.

I'd expect gung ho US supply houses to have access to most Asian parts.
A Hong Kong supply house with good enough English skills and wide
Asian access is mobicon.
I think they are Taiwan HQ based but have branches in a range of Asian
countries and in South Africa.
        Contacts    http://www.mobicon.com/en/contact.php
They list the usual impressive range of suppliers eg
http://www.icmaster.com.hk/cgi-bin/index.asp
And, though I've never bought from them in 1 offs, the HK branch
advertise a wide range of parts at 1 off prices - often far from cheap
but presumably equovalent to a local RS/Farnell service.

eg AVR development kits

   http://www.icmaster.com.hk/cgi-bin/products_equip.asp?brand=3DATMEL&type=
=3DDevelopment%20Tools&category=3DProgrammer%20and%20Development%20Tools&np=
age=3D1

Divide by about 7 for conversion to $US.
So STK100 at $HK650 or just under $US100 compared to $US74 from
Digikey (according to Findchips - no stock or price according to
Digikey).


TYere are a range of Asian sourced specialty chips that are widely
available in Asia but largely not elsewhere.
eg boost converters with shut down, voltage feedback, FET drive, 1V
startup and 1 2 3 NimH or wider operation - suited to eg cellphone
charging, priced in 10c 20c range in modest volume. LiIon battery
chargers/controllers, cell protection devices and more. A trick is to
be sure that what you are getting is what you think it is and is from
the same manufacturer. Reputable suppliers such as eg Mobicon mayn be
somewhat OK at ensuring  this but surprises can still happen. Knowing
why you think what you think you know is useful :-).




            Russell

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