Hi, why transitors have 3 legs?

[Jamie]

I've always heard the terms "live bug" and "dead bug", but ICs have
leads, not legs. I'm a live-bug fan myself, given that most parts are
surface-mount these days.

https://dl.dropbox.com/u/53724080/Circuits/Protos.JPG




Maybe in a university. I've never heard the term in industry. Call
them "legs" if you like.

We only referred them as legs in cases that support themselves..

For example:

TO-92, where when solder on the board, they become the supporting
member that holds/stands the package. In which case, we may refer to
them as legs.

Any other case, where the package does not require the support of the
leads as legs, they are then leads or pins.

say it as you may, when some one says legs, I assume a free standing
package via it's leads.

Jamie

 

[[email protected]]

We only referred them as legs in cases that support themselves..

For example:

TO-92, where when solder on the board, they become the supporting
member that holds/stands the package. In which case, we may refer to
them as legs.

Any other case, where the package does not require the support of the
leads as legs, they are then leads or pins.

say it as you may, when some one says legs, I assume a free standing
package via it's leads.

So a DIP or even an SO package has legs? A QFN must, too. By that reasoning
all passives have legs, even SMT. Nope, not buying that difference, either.

 

[Chieftain of the Carpet Crawlers]

"Silver wires" !!! What a joke. Did you ever hear of "silver" wire
bonds?

Yup, amateurs refer to "legs" and "silver wires"

Check the author's link. Artist. Amateur.

I suppose that you have referred to pins as "legs" for decades. That's
because you are AlwaysWrong.

It was a photo, idiot. The photographer doesn't matter and he did not
write the caption either.

I got it from a page about Fairchild semiconductor.

You know... the FIRST IC chip maker.

You lose... again... idiot.

 

[Chieftain of the Carpet Crawlers]

Maybe in a university. I've never heard the term in industry. Call
them "legs" if you like.

For him it's "if you like", but me and John are "amateurs", right,
Larkin?

You are transparent, boy.

 

[josephkk]

I don't know anybody who uses the word "legs" to mean "leads" or
"pins" or "terminals" or "balls." Mechanical things can have legs.

So you disclaim knowing everybody here that is playing the game.

?-)

 

[josephkk]

Call them legs if you like, but it IDs you as an amateur.

Leads, legs, pins, terminals, dohickies or whatever; the term used don't
mean squat so long as clear communication is achieved.

?-)

 

[josephkk]

Do any pcb CAD programs identify "leg1", "leg2", etc?

Dang. You are really being a pedantic prunt about this.

?-)

 

[Chieftain of the Carpet Crawlers]

What's your problem? Little jealous because your mental faculties are
no challenge for JK ?

Jamie

You are so retarded, you can't even get the initials right.

You're a fucking joke. Every post you make further proves that.

 

[Chieftain of the Carpet Crawlers]

As I said, using "leg" IDs one as an amateur. A lot of people are
defending the usage, for reasons that I can't understand.

Show us the "layman" and "professional" terms glossary, you pathetic,
immature, pointless, and wholly WRONG asswipe!

 

[Chieftain of the Carpet Crawlers]

CAD and FPGA programs have "pin planners", not "leg planners." Reports
count pins used, not legs used. Datasheets never refer to "transistor
legs." Maybe you can find counter-cases. Please do so.

This from a guy who claims to have been around the industry for
decades.

Sure, pins is the term now. In the days of two and three 'legged'
devices, however, it was used, and especially as the J-lead and L frame
SMD packages began to hit the industry.

There are also devices configured in banks where the discreet element
interconnects are referred to as "legs".

I can remember more than a few TV repairs where the transistor that
went in was configured to be soldered on top of the old pads instead of
trying to get wetting on a cheap TH PCB, much less the worry about the
lead length. The bent LEGS insured that no such problem would exist.

The term was most certainly in use by the entire industry and was by no
means an "amateur" or "lay person" term.

So **** off, Larkin. You are a goddamned loser and nothing more.

 

[Chieftain of the Carpet Crawlers]

CAD and FPGA programs have "pin planners", not "leg planners." Reports
count pins used, not legs used. Datasheets never refer to "transistor
legs." Maybe you can find counter-cases. Please do so.

The term is used in several segments of the industry. It is used in
power distribution and MATV and CATV system distribution nomenclature.
Years ago, it was used in describing elements of components and
transducers, even as small as a transistor.

You are a trivial pain in the ass, john... A slight itch, but what
you are mainly is WRONG, as usual.

You are pathetic, John. A true layman, you are.

You are a true insult to the profession.

 

[Chieftain of the Carpet Crawlers]

You're avoiding answering any of the real questions.

You have yet to chastise the OP for his use of the term.

You are like PIGS and their "modern day" Zimmerman complex ridden
"training" which has the idiots performing "selective enforcement" of the
laws they take an oath to uphold.

You would first have to know what the word oath means.

They do not.

Your behavior is very much the same. Quite pathetic, are both
"examples" of "civil man".

They have fucked society since 1937 and idiots like you have since the
days when Bell stole the telephone and laid claim to being its inventor
when all the retarded bastard was is a thief.

All you are is a retarded FUD boy.

 

[legg]

Do any pcb CAD programs identify "leg1", "leg2", etc?

Feeling steady on your pins, boy?

RL

 

[Chieftain of the Carpet Crawlers]

The engineering community evolves its insider
nomenclature.

A fact you have obviously forgotten, since you claim to have never
heard of a transducer connection being referred to as a "leg".

You are a liar or an interloper in the industry. You decide which.

 

[Chieftain of the Carpet Crawlers]

If I'm proposing a synchro interface, or an optical thing, or some
cryogenic gadget, I research the field to make sure my terminology
sounds professional to my expected audience. You can argue that it
shouldn't matter, but it does.

Were I your customer, it would matter a hell of a lot more if you
actually knew the terms before you felt the need to hunt them up, just to
"sound good". If I knew ahead of time that you were just a 'word shill',
you would win no contracts from me.

You are the worst type of 'engineer', by far.

 

[Chieftain of the Carpet Crawlers]

But the term
isn't used in the professional EE community,

Ten of us against you as ONE. I think the professionals win, John. You
lose, you layman fucktard!

 

[Chieftain of the Carpet Crawlers]

Riveting reading though it is, would you ladies please conduct your
cat fight elsewhere?

**** off and die, you ZERO contribution EVER, fucking group abusing
interloping ****!

You get to tell NO ONE what to do ANYWHERE in the world, you adolescent
brained ASS!

 

[Chieftain of the Carpet Crawlers]

Transducer leg? No, I don't think I've heard of a transducer
connection being called a "leg."

Google "transistor leg." All the hits look like amateurs.

You are so stupid, you don't even know what the term "transducer"
means. It covers every device you ever laid hands on, idiot. From a
resistor to that tin hat you wear.

You have already lost, John. Give up already.

 

[Jamie]

So a DIP or even an SO package has legs? A QFN must, too. By that reasoning
all passives have legs, even SMT. Nope, not buying that difference, either.

Last time I looked, dips get support by their under body when inserted
into a socket of solder onto a board. In which case, leads? This goes
for the majority of packages and how they are mounted, these days.

I don't know where you got that analogy from? Haven't you seen the
old days of where transistors with their little wire leads be supported
by their leads?

My legs support my body with out my stomach or ass touching the
ground. I can say for sure, I have legs not leads however, I think there
are some here, that sit on their arses far to much and can't claim that.

A TO-220 style case when mounted into a board with out any mounting
could be said that it has legs, because it is being supported
mechanically via it's leads. So that analogy goes both ways. If it were
to be mounted against a back plane the usually way, then we could say
the leads are used as leads only.

Twisted it around all you want, most of us know the difference.

Jamie

 

[Jamie]

Call them legs if you like, but it IDs you as an amateur.

Ok, if you say so. That's an opinion with very little content to support it.

Coming from my end, it only shows how much you really communicate
with customers in the field. I am always talking to technical people on
daily bases and that term comes into play many many times and no one
even blinks an eye or question authenticity or context. Maybe they know
something you don't.. Wait, that can't happen, can it?

Jamie