This document details the features and characteristics of the ATmega16U4, including high performance, low power, high endurance, and non-volatile storage.
This datasheet describes the ATtiny24A and ATtiny44A microcontrollers, highlighting their high‑performance, low‑power AVR® 8‑bit core, 32 general‑purpose registers, and a range of peripherals such as timers, ADCs, and communication interfaces. It includes feature tables, pin‑out diagrams, and a block diagram of the device architecture.
The document also lists electrical characteristics, package options, and detailed register maps, along with notes on programming, power‑saving modes, and available development resources. Contact information for Atmel worldwide offices is provided at the end of the file.
| Flash Memory | 2 KB / 4 KB |
|---|---|
| EEPROM | 128 B / 256 B |
| SRAM | 128 B / 256 B |
| Operating Voltage | 1.8 V – 5.5 V |
| Speed Grade | 0‑4 MHz @1.8‑5.5 V, 0‑10 MHz @2.7‑5.5 V, 0‑20 MHz @4.5‑5.5 V |
| Package Types | 20‑Pin QFN/MLF/VQFN, 14‑Pin SOIC, 14‑Pin PDIP, 15‑ball UFBGA |
| I/O Lines | 12 programmable I/O lines |
| ADC Channels | 8 single‑ended, 12 differential pairs (10‑bit) |
| Power Consumption (Active Mode) | 210 nA at 1.8 V, 1 MHz |
The devices contain 2 KB or 4 KB of in‑system, self‑programmable flash memory.
They operate from 1.8 V up to 5.5 V.
The microcontrollers provide twelve programmable I/O lines.
They are offered in 20‑pin QFN/MLF/VQFN, 14‑pin SOIC, 14‑pin PDIP, and 15‑ball UFBGA packages.