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ATMEGA644P-20AU

MCHPATMEGA644P-20AU

Microchip Technology
AVR AVR® ATmega Microcontroller IC 8-Bit 20MHz 64KB (32K x 16) FLASH 44-TQFP (10x10)
NRND2,002 in stock
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Overview

The ATMEGA644P-20AU is a high-performance, low-power 8-bit AVR RISC-based microcontroller featuring 64KB of self-programmable flash memory and 4KB of SRAM. It operates at speeds up to 20MHz and includes an on-chip 2-cycle multiplier, making it efficient for real-time control applications. The device is housed in a 44-TQFP package and offers a robust set of peripherals including dual USARTs and 32 general-purpose I/O lines.

Why Choose This Part

This microcontroller balances a high I/O count with a compact 44-pin footprint, offering significantly more RAM (4KB) and Flash (64KB) than standard entry-level 8-bit MCUs. Its low power consumption (down to 0.1uA in shutdown) and wide range of sleep modes make it suitable for battery-backed applications requiring high responsiveness.

Applications

Industrial Control Systems
Utilizing the 32 I/O pins and 20MHz throughput for PLC-style logic and sensor interfacing.
Capacitive Touch Interfaces
Leveraging the Atmel QTouch library support for implementing buttons, sliders, and wheels in user interfaces.
Data Logging
Using the 2KB of internal EEPROM and 64KB of flash to store configuration data and event logs.
Communication Gateways
Managing bridge protocols between I2C, SPI, and the dual USART serial interfaces.

Key Specifications

Speed 20MHz
RAM Size 4K x 8
Core Size 8-Bit
EEPROM Size 2K 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 64KB (32K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 44-TQFP (10x10)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Developers can use the Microchip Studio (formerly Atmel Studio) IDE along with the AVR GCC compiler for firmware development. Hardware debugging and programming are supported via the JTAG or ISP interfaces using tools like the Atmel-ICE or the MPLAB PICkit 4. The part is also compatible with various AVR-based development boards and the Arduino environment with custom core definitions.

Also Consider

ATMEGA1284P-AU MCHPMicrochip Technology - Offers double the flash memory (128KB) and 16KB of SRAM in the same 44-TQFP pinout for memory-intensive applications.
ATMEGA644PA-AU MCHPMicrochip Technology - The 'PA' version features PicoPower technology for even lower power consumption in active and idle modes.

Categories

Microcontrollers > AVR