Re: Equivalent NPN Transistor for 8560E
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1) You have your Xs and Ts transposed.
2) Looks like it crosses to a CXT2222A currently in stock at Mouser and likely others. The "extra" lead in the body is just like the tab on a TO-220 case; in this case it's the collector as is the center pin.
Dave Casey
On Mon, Apr 8, 2019 at 5:31 AM Dave Ireland < mirrors@...> wrote:
Tracked down the fault in a 8560E to failure
of the regulator transistor in the 100Mhz VCXO. Substituted the
supply and the oscillator circuit is drawing little current so I
am not sure why it would have failed except there is evidence
someone changed the crystal so might have been their fault.
The transistor is listed is a 1854-1094 or
manufacturer part number PTX2222A. Google this results in a lot
of Japanese and NPN thrown in the mix. The Equivalents List says
it is a MTX2222A which is also a mystery.
I am assuming it is a SMD style 2N2222A but
the under body solder pad with the 4 legs has me a bit concerned
it might be something special. Anyone know this device? ? ?
Dave
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