There are also SOT-23-6 parts in the TinyAVR series. The ATtiny4,5,9,10. Here's the 10: http://www.atmel.com/devices/ATTINY10.aspx http://www.atmel.com/device

There are also SOT-23-6 parts in the TinyAVR series. The ATtiny4,5,9,10. Here's the 10: http://www.atmel.com/devices/ATTINY10.aspx http://www.atmel.com/devices/ATTINY10.aspx They use something different than the conventional ISP protocol though (TPI) -- but I think people have come up with ways to do that even with third party hardware and avrdude. I believe that it is true that Microchip was there first, though. For a while, the lowest pin-count AVRs were SOIC-8 and DIP-8.