[sdiy] double transistors

[Trevor Page]

Hi,

Farnell stocks these components. I ordered these for exactly the same purpose (TB303 VCO, VCF) but they have been sitting on my desk for month since I've not taken the time to try them yet, so not sure how they perform. Actually, I didn't order the PUM components, but got the BC857s and BC847s instead. The PUMZ, PUMX and BC dual SMD devices are grouped together in the Farnell semi's catalogue.

I also found Farnell's SMD tempco's useful...

Trev


----- Original Message -----
From: harm jansen <polynipaam at yahoo.com>
To: synth-diy at node12b53.a2000.nl
Sent: Thu, 5 Apr 2001 10:44:06 +0100 (GMT+01:00)
Subject: [sdiy] double transistors

> 
> Hi All,
> 
> While looking for double transistors I stumbled upon
> some SMD double transistors that seem interesting for
> applications where space is a problem.
> 
> Philips semiconductor makes three kinds:
> the first device is two NPN transistors in one package
> the second device is two PNP transistors in a package
> the third device is one NPN and one PNP in a package
> 
> names: PUMX1 PUMT1 PUMZ1
> 
> Does anyone know which company stocks these.
> The only companies that I found where arrow and
> pioneer
> but the quantity that you have to take is quite large.
> But the price is unbelievably low $0.063. This would
> make the cost $189 not a lot for 3000 double
> transistors.
> 
> Harm
> 
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