ic package SOT-23 and TO-92
What's the full name of SOT and TO?
Where does these digits come from? made from engineering society?
2007-12-04 21:04:40 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
They're just letters and numbers; they don't really mean anything. "Small Outline Transistor" and "Transistor Outline" are sometimes suggested, but these are attempts to add meaning after the fact.
SOT-23 is the usual surface-mounted transistor package. It has three leads. The one on its own is the collector (or the drain if it's a FET); when that is at the top, the left-hand one is the base or gate and the right-hand one is the emitter or source.
TO-92 is a very common through-hole leaded transistor package, the "D" shape which you will probably find on any circuit board. It also has three leads. The lead order seems to vary according to the part number (but is at least consistent among manufacturers). EBC and BCE (left to right, flat side uppermost) are common, but all the other four possibilities do occur. To add to the confusion, other devices such as voltage regulators, low-power SCRs and even melody players are sometimes housed in TO92 packages.
2007-12-04 23:52:23 · answer #1 · answered by sparky_dy 7 · 1⤊ 1⤋
Sot-23 Package
2016-11-11 23:19:36 · answer #2 · answered by nickelston 4 · 0⤊ 0⤋
To-92 Package
2016-12-26 18:07:47 · answer #3 · answered by bringger 4 · 0⤊ 0⤋
Well SOT is " Small Outline Transistor Plastic Package" I don't think I've ever know exactly what TO means, but TO-92 is a plastic (usually transistor) package
I think both are probably JEDEC ( http://www.jedec.org/ ) standards.
See also: http://en.wikipedia.org/wiki/JEDEC
2007-12-04 23:45:05 · answer #4 · answered by tinkertailorcandlestickmaker 7 · 2⤊ 0⤋