Table of Contents

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Overview

This is the introduction to the AtTiny85/45/25 family of microcontrollers.

The AtTiny85 is a low-cost, small form factor microcontroller in the AVR 8 bit family of processors.

The AtTiny45 and AtTiny25 microcontrollers are almost identical but have reduced memory and are generally cheaper1). This article will focus on the the 85, but differences to the smaller chips will be noted.

Features

Advantages

Disadvantages

Hardware

Clock

Memories

1)
Due to supply and demand, it is not uncommon for the AtTiny85 to be cheaper than its less capable siblings!