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mneary said:If you shop at http://www.ROHM.co.jp you would be looking for digital transistors.
Hero999 said:I'm sure there are lots of them. They're just designed to buffer microcontroller outputs for things like relays.
It'd be handy if you could get them in four pin packages, with a built-in freewheel diode so relays can be switched with no external components.