By day 2 or 3 now, I am getting more comfortable with my schematics/PCB layout software. So, I went back and re-did the schematics for my mixer input amp section, so that it better imports the connections into my matching PCB software. This "turns on" the trace connection helping thingy.
It worls pretty slick. As you add comonents to the PCB layout, when you give them the name that matched a component in the linked schematic, you can click a pin on the PCB and the other pins it connect to highlight. Works great. Except for this ONE component, lmao...
two components, actually, a matched set of NPN and PNP transistors. I went to mouser's website for component information, like lead spacing and component dimensions and stuff. The PNP is a BC560C, the NPN is a BC550C. I'm assuming I'll use the "standard" TO92 case versions.
in the Mouser catalog page, AND the manufacturers adobe PDF datasheets, orienting the flat edge to the right, the collector is the bottom pin, on both transistors.
Question: since mouser and the data sheets only identified the Collector pin, what order are the other two pins? I was assuming base in the middle, 'cos it "looks" in the middle on schematics representations of transistors...so, after Collector is ID'd and you orient the case accordingly...does it go Collector, Base, Emitter or Colector, Emitter Base?
Question #2: as a PCB component for trace layout, I grabbed "TO92" semiconductor for these two. Once linked to the schematic, the "trace helper" thing is ID'ing the pins differently...
On the one, its highliting connections to be "collector, emitter, base", with the ID of the colector pin the same as the data sheets. (this is the PNP)
On the NPN, its saying the base is in the same place, but switching the collector and emitter, as if to say "Emitter colector base", with teh base matching the othee one's location.
I can positively ID the collecor from teh data sheets, and i assume theres a convention for the order of the other two...CEB likely...but then, why is it showing the collecor in teh middle on the NPN case?? I assumed the emitter ws ALWAYS the arrrow pin on schematics, with any transistor.
does the software know something abuot pinouts standard location in to92 cases I cant get off the data sheets???
EDIT: on the schematic, the npn and pnp are runnign as a matched pair, with bases and collectors tied together...
It worls pretty slick. As you add comonents to the PCB layout, when you give them the name that matched a component in the linked schematic, you can click a pin on the PCB and the other pins it connect to highlight. Works great. Except for this ONE component, lmao...
two components, actually, a matched set of NPN and PNP transistors. I went to mouser's website for component information, like lead spacing and component dimensions and stuff. The PNP is a BC560C, the NPN is a BC550C. I'm assuming I'll use the "standard" TO92 case versions.
in the Mouser catalog page, AND the manufacturers adobe PDF datasheets, orienting the flat edge to the right, the collector is the bottom pin, on both transistors.
Question: since mouser and the data sheets only identified the Collector pin, what order are the other two pins? I was assuming base in the middle, 'cos it "looks" in the middle on schematics representations of transistors...so, after Collector is ID'd and you orient the case accordingly...does it go Collector, Base, Emitter or Colector, Emitter Base?
Question #2: as a PCB component for trace layout, I grabbed "TO92" semiconductor for these two. Once linked to the schematic, the "trace helper" thing is ID'ing the pins differently...
On the one, its highliting connections to be "collector, emitter, base", with the ID of the colector pin the same as the data sheets. (this is the PNP)
On the NPN, its saying the base is in the same place, but switching the collector and emitter, as if to say "Emitter colector base", with teh base matching the othee one's location.
I can positively ID the collecor from teh data sheets, and i assume theres a convention for the order of the other two...CEB likely...but then, why is it showing the collecor in teh middle on the NPN case?? I assumed the emitter ws ALWAYS the arrrow pin on schematics, with any transistor.
does the software know something abuot pinouts standard location in to92 cases I cant get off the data sheets???
EDIT: on the schematic, the npn and pnp are runnign as a matched pair, with bases and collectors tied together...