ATMEGA644PA-AU - Atmel

Manufacturer Part Number

ATMEGA644PA-AU

Manufacturer

Microchip Technology

Introduction

8-Bit AVR Microcontroller with In-System Programmable Flash

Product Features and Performance

Core Processor AVR

Core Size 8-Bit

Speed 20MHz

Connectivity I2C, SPI, UART/USART

Peripherals Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O 32

Program Memory Size 64KB (32K x 16)

Program Memory Type FLASH

EEPROM Size 2K x 8

RAM Size 4K x 8

Voltage Supply Range 1.8V to 5.5V

Data Converters A/D 8x10b

Oscillator Type Internal

Operating Temperature Range -40°C to 85°C

Mounting Type Surface Mount

Supplier Device Package 44-TQFP (10x10)

Package Case 44-TQFP

Product Advantages

High performance relative to its 8-Bit class

Broad Vcc operating range suitable for various applications

Extensive connectivity options with I2C, SPI, UART/USART support

Generous program memory and RAM for complex applications

Robust peripheral set including PWM and watchdog timer

Integrated analog-to-digital converters

Key Technical Parameters

Speed 20MHz

Program Memory 64KB FLASH

Data EEPROM 2KB

RAM 4KB

32 I/O Pins

A/D Converter 8-channels, 10-bit resolution

Quality and Safety Features

Brown-out Detect/Reset

Power-on Reset (POR)

Watchdog Timer (WDT) for system reliability

Temperature range ensures performance in extreme conditions

Compatibility

Compatible with various microcontroller development environments

Supports in-circuit serial programming

Application Areas

Consumer Electronics

Industrial Control Systems

Automotive systems

Home automation

Internet of Things (IoT) devices

Product Lifecycle

Currently Active

No reported discontinuation

Potential upgrades available with newer AVR ATmega series

Several Key Reasons to Choose This Product

Balance of power efficiency and processing capabilities

Flexible voltage requirements accommodating a wider range of applications

Comprehensive suite of peripherals minimizing the need for external components

Large community support and extensive documentation

High reliability and safety features suitable for critical applications

Future-proofing with active product status and support