ATtiny43U

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ATtiny43U
ATtiny43U
# of Pins 20
Operating Voltage 1.8 to 5.5 V (4 MHz)
2.7 to 5.5 V (8 MHz)
CPU 8-bit RISC
Clock Speed 4 MHz or 8 MHz (selectable)
Flash 4 KB
SRAM 256 B
EEPROM 64 B
Max I/O 16
Packages SOIC-20
QFN-20
Datasheets Summary (PDF)
Complete (PDF)

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
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