Hi,
i am looking to use a Fairchild QRE1113gr but i cant figure out what type of photo transistor it is. let me explain my confusion, the data sheet shows this
pin 3 being the collector and pin 4 being the emitter. surly this makes this a pnp arrangement, but when i have searched google for this part every application i find shows this part as an npn type like this.
so is it an npn or pnp type? what could i look for in the datasheet to help me know which one it is. i must admit i am more inclined to think it is a npn and due to the fact that people are using this device in this way.
thanks
Dave
i am looking to use a Fairchild QRE1113gr but i cant figure out what type of photo transistor it is. let me explain my confusion, the data sheet shows this
pin 3 being the collector and pin 4 being the emitter. surly this makes this a pnp arrangement, but when i have searched google for this part every application i find shows this part as an npn type like this.
so is it an npn or pnp type? what could i look for in the datasheet to help me know which one it is. i must admit i am more inclined to think it is a npn and due to the fact that people are using this device in this way.
thanks
Dave