ATtiny43U

ATtiny43U is an ultra low-voltage picoPower microcontroller in the Atmel AVR family. It is available in either the 20-pin SOIC or the 20-pin QFN package with a 4 or 8 MHz selectable clock speed. Running higher clock speeds require higher minimum operating voltages, with 1.8 volts for 4 MHz and 2.7 volts for 8 MHz.

The ATtiny43U has the following features:


 * 8 touch channels
 * 1 SPI
 * 1 I2C
 * 10-bit with 4 channels
 * 1 analog comparator
 * temperature sensor
 * 2 timers
 * 4 PWM
 * internal RC oscillator
 * watchdog