BC559B PNP Epitaxial Silicon Transistor

Hello anyone please describe its features?
i gone through Data sheets but couldnt find the proper working? why it is used and how it is useful for 7 segment displays?
regards
Rizwan
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RsK wrote:

Read the data sheet you pea-brain !
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Eeyore:
My $.02 :-
There's nothing forcing you to answer questions in this forum, so to grudgingly answer questions in such a gruff, insulting and condescending manner is completely uncalled for.
If someone in your past treated you so thoughtlessly I apologize, but break the cycle.
Actions and attitudes like yours are what keeps many from entering technology-related hobbies. Way to screw the future, pal!
-Will

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"@@" wrote:

(a) It's not a forum !
(b) Where the heck are you posting from anyway ? I'll wager it's not s.e.d

It most certainly is in a design 'forum' as you like to call it.

No. Idiots who can't read the data sheet and understand it simply have no future. A modicum of simple mental competence is required to be a designer.
The question would conceivably have suited sci.electronics.basics however. FYI the Fairchild data sheet says......
Switching and Amplifier (transistor) High Voltage: BC556, VCEO= -65V Low Noise: BC559, BC560 Complement to BC546 ... BC 550
It's virtually (it is) a generic small signal device.
Graham
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it's used as a high side switch, google "transitor switch" .
Bye. Jasen
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jasen wrote:

It's a general purpose, medium to low voltage, low power, pnp transistor for heaven's sake ! Aside from its respectable (but commonplace these days) noise performance and good hFE, it is wholly unremarkable.
Graham
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