BC184L transistor component

Am 24.07.2016 um 12:04 schrieb Andy Betts:

I'm taking my first baby steps into circuit design, with the intention of making guitar effect pedals that are as close to the original vintage spec as possible... Here's my issue.

 

I'm laying out the schematic for the circuit, and went to the library to pull out a BC184L transistor and there wasn't one. The closest to it I could find was a BC109, however I would really like the 184L as that's the correct one for the circuit. can I just create a new one in the library from an existing component that's virtually the same, or is there a resource for obtaining the correct library file, or am I missing something blatantly obvious as a newbie.

 

 

Thanks for your patience in advance...

 

Andy

 

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The manufacturing companies use  a lot  of different characters behind

the actual number, sometimes half the alphabet

So you should check the internet for BC184 and BC184L data sheets and

compare them.

For your layout it is important that the case /pins are the same

position as for the Transistor you want to use, for your schematics the

name is not important. If the BC109 suits you, you can NAME it BC184L

because in the schematics it a symbol only while the layout will become

the real thing.

If you insist to have a BC184L in a library then you should/must make

your own libraries, because if you add your new device to a system

library, be aware that your work will be lost on  the next update.

You should also know that no layout program has all the devices ready

which are available on the market, so it is a good practise to create

your own devices (in your own libraries). Only then you can be certain

that the footprint is correct.

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Mit freundlichen Grüßen / With best regards

Joern Paschedag

On 24/07/16 12:24, Joern Paschedag wrote:

 

For your layout it is important that the case /pins are the same

position as for the Transistor you want to use, for your schematics the

name is not important. If the BC109 suits you, you can NAME it BC184L

because in the schematics it a symbol only while the layout will become

the real thing.

If you're doing that, you should use a BC337 rather than a BC109,

because the 337 is the same package as the 184 - although check pin-outs

because the BC184L may differ from the BC184 without a suffix. Or you

could use one of the generic "TO-92-EBC" type devices but beware because

at least one of them is wrong.

On 24/07/16 12:24, Joern Paschedag wrote:

 

For your layout it is important that the case /pins are the same

position as for the Transistor you want to use, for your schematics the

name is not important. If the BC109 suits you, you can NAME it BC184L

because in the schematics it a symbol only while the layout will become

the real thing.

If you're doing that, you should use a BC337 rather than a BC109,

because the 337 is the same package as the 184 - although check pin-outs

because the BC184L may differ from the BC184 without a suffix. Or you

could use one of the generic "TO-92-EBC" type devices but beware because

at least one of them is wrong.

Am 24.07.2016 um 14:12 schrieb Rob Pearce:

On 24/07/16 12:24, Joern Paschedag wrote:

 

For your layout it is important that the case /pins are the same

position as for the Transistor you want to use, for your schematics the

name is not important. If the BC109 suits you, you can NAME it BC184L

because in the schematics it a symbol only while the layout will become

the real thing.

 

If you're doing that, you should use a BC337 rather than a BC109,

because the 337 is the same package as the 184 - although check pin-outs

because the BC184L may differ from the BC184 without a suffix. Or you

could use one of the generic "TO-92-EBC" type devices but beware because

at least one of them is wrong.

 

Hi Rob,

since you mention the TO-92-ECB.

This was imo the worst bullshit produced.

In the eagle libraries always the pads are numbered  while the pins have

the name.

In the connect dialog of the devices the pin names are  connected to the

corresponding pad numbers.

So there is no need for ECB etc. at all.

AFAIR someone else brought up this problem and the hope that cadsoft

will clean up this.

But that is a lot of work to check all the devices with a TO-92 body.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag