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ATMEGA1284P-AU

MCHPATMEGA1284P-AU

Microchip Technology
Popular 128KB AVR with different peripheral mix and package options.
NRND20,816 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The ATMEGA1284P-AU is a high-performance, low-power 8-bit AVR RISC-based microcontroller featuring 128KB of ISP flash memory and a generous 16KB of SRAM. Operating at up to 20 MHz, it provides a significantly larger memory footprint than the standard ATmega328P while maintaining the familiar AVR architecture and toolchain compatibility. This variant is housed in a 44-pin TQFP package and includes an on-chip 2-cycle multiplier and 4KB of EEPROM.

Why Choose This Part

This MCU offers one of the highest SRAM-to-Flash ratios in the 8-bit AVR family, making it ideal for RAM-intensive tasks like RTOS implementation or large communication buffers. It provides a seamless upgrade path for designs outgrowing the ATmega328P, offering 4x the Flash and 8x the SRAM while remaining within the well-supported Microchip Studio and AVR-GCC ecosystem.

Applications

Industrial Automation Controllers
Utilizing the 128KB flash and 16KB SRAM to manage complex control logic and communication protocols in factory environments.
Capacitive Touch Interfaces
Leveraging QTouch library support to implement buttons, sliders, and wheels for user interface panels.
Data Logging Systems
Using the 4KB EEPROM and large SRAM buffer for localized data storage and processing before transmission.
Battery-Powered Remote Sensors
Taking advantage of multiple low-power modes, such as Power-down and Power-save, to extend service life in remote installations.

Key Specifications

Speed 20MHz
RAM Size 16K x 8
Core Size 8-Bit
EEPROM Size 4K x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 32
Core Processor AVR
Package / Case 44-TQFP
Data Converters A/D 8x10b
Oscillator Type Internal
Program Memory Size 128KB (64K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 44-TQFP (10x10)
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V

Getting Started

Begin development using Microchip Studio or the MPLAB X IDE with an AVR ISP mkII or MPLAB PICkit 4 programmer. The part is fully compatible with the Arduino environment via the MightyCore third-party core, allowing for rapid prototyping on breadboards or custom PCBs. For hardware evaluation, the chip can be integrated into designs using standard TQFP-44 breakout boards.

Part of ATmega family » ATMEGA1284P

ATMEGA1284P Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
ATMEGA1284P-AU (this part) TQFP-44 20,816
ATMEGA1284P-PU DIP-40 7,117
Also available as: ATMEGA1284P-MU

Also Consider

ATmega1280 MCHPMicrochip Technology - Offers significantly more I/O pins and additional timers for complex motor control or large-scale interface applications.
ATSAMD21G18A MCHPMicrochip Technology - A 32-bit ARM Cortex-M0+ alternative for applications needing higher computational performance and integrated USB support.

Categories

Microcontrollers > AVR