On a sunny day (Fri, 1 Feb 2013 11:13:45 -0800) it happened
(Dave Platt) wrote in :

In article ,
Jan Panteltje wrote:

Also how to tell you have a "digital" transistor in front of you?

WTF is a 'digital transistor'?????????????????

This is a fairly common term for a composite device... it's packaged
like an ordinary transistor (SMT or TO-92), but includes a
current-limiting resistor in the base lead (and often a base-to-
emitter pulldown).

It's used as a power-switching device, driven directly from a logic
signal (often a microcontroller pin).

Think of it as "just about the simplest sort of 'integrated circuit'
you can imagine". It's even simpler than the tiny little "simple glue
logic" chips you can buy these days (e.g. a NOT gate in a four-pin SMT
package, or a NAND in a 5-pin).

For a very short moment I did think 'unijunction transistor',
at least those are either on or off, but then I dismiossed that on context.
I bought a bunch of 2n4246 UJTs last year from ebay.
Make nice oscillators.