Chip Scale 12 Pin ATTINY20-UUR

Possibly the smallest 12 pin micro-controller currently available?


  • 1.5 x 1.4 x .5 mm 🙂 2KB 12Mhz 10 IO pins
  • .4mm pin pitch
  • Possible to route 8 of the IO using .127mm (5mil) traces and clearance
  • You loose one internal pad due to trace width, and another external pad because one of the internal pads is GND which is necessary.
Overview of the package – some great hits on PCB layout: http://www.atmel.com/Images/doc42007.pdf
Product page from Atmel, also links to the datasheet: http://www.atmel.com/devices/ATTINY20.aspx

Digikey currently sells it for $1.1 at 100 qty: http://www.digikey.com/product-detail/en/ATTINY20-UUR/ATTINY20-UURDKR-ND/3775099

Compared to a 32Pin QFN package:

Chip Scale Package 12Pin

Compared to various other Atmel MCUs



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