Dual BC547 NPN Transistor IC?

Thread Starter

cce1911

Joined Jun 11, 2013
41
I have a circuit that requires 2 BC547's in a T0-92 package. Is there a dual version of this IC in a PDIP package?
 

Thread Starter

cce1911

Joined Jun 11, 2013
41
Max,
Are you suggesting to get rid of the 2nd NPN and the 10K resistor and only go with a single MOSFET?
-Capel
 

MaxHeadRoom

Joined Jul 18, 2013
19,980
Yes.
The original 2n7000 was designed as a FET darlington equivalent, named a 'Fetlington'!
And was intended to interface TTL and CMOS to higher loads and voltages.
But I always keep lots on hand and found them a real work horse in the right application.
You keep the 10k load and the first 100k on the input.
It just might work for your circuit.
Max.
 

Thread Starter

cce1911

Joined Jun 11, 2013
41
What about leakage? I would like the 3v button cell to last as long as possible. The switch is only triggered intermittently and I don't want to have to change the battery every day or two.
 

ian field

Joined Oct 27, 2012
6,539
I have a circuit that requires 2 BC547's in a T0-92 package. Is there a dual version of this IC in a PDIP package?
There used to be pages in the data books of dual transistors & JFETs for external long-tailed pair on the front end of op amps.

Usually in a 6 pin TO18 or TO5, they were designed to be closely thermally and parameter matched.

They're not so popular as they once were, but you may find something that's a very near equivalent to the 547.

The BC547 was pretty much the cheap plastic version of the BC107, so that might help when comparing parameters.
 
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