matched transistors in chips

[WeAreAs1 at aol.com]

In a message dated 7/21/00 4:07:07 AM Pacific Daylight Time, 
diode at hotmail.com writes:

<< Dont know if anyone already knows about these, but I just identified more 
 chips in my box of weird maybe they'd be useful oneday box and came out with 
 matched transistor quads!
 
 MPQ series or in surface mount MMPQ series some are straight equivalents to 
 the number of the corresponding transistor ie MPQ3904 = 4x 2n3904 also  
 2907, 3906 in this fashion, there are others that seem to just have 
 arbitrary numbers, and the TPQ series seems the same too from tests I've 
 tried but no data.. >>

Hi Danial,

If I remember correctly (and I may not..), those IC's are just four separate 
transistor dies miolded into one plastic package.  They are not four 
transistors formed on one substrate/die.  Therefore, there probably wouldn't 
be much advantage in using them over using four randomly-selected 2N3904 
transistors, other than they would have a bit better thermal coupling, and 
their package is small and neat.  I could be wrong about this, though.  Maybe 
you could point us to the data sheet?

Michael Bacich