The ATtiny12L-4SU with AVR AVR® ATtiny is an 8-bit microcontroller integrated circuit (IC) manufactured by Microchip, clocked at 4MHz with 1KB of Flash memory. It is an 8-SOIC package, which means it is made up of 8 leads in a Small Outline Integrated Circuit (SOIC) form factor. This flash memory is also split between two sectors of 512 bytes per sector. Additionally, this IC has four general-purpose 8-bit I/O lines, an 8-bit timer, an 8-bit prescale counter, and an internal oscillator. It is generally used for applications involving short power-on times, low power consumption, small size, and low cost.