ATMEGA644PA-AU

The ATMEGA644PA-AU is a high-performance, low-power 8-bit AVR microcontroller from Atmel (now part of Microchip Technology). It features an advanced RISC architecture with 131 instructions, most executed in a single clock cycle. The device offers 64KB of in-system self-programmable Flash memory, 4KB of SRAM, and 2KB of EEPROM. It operates at a maximum clock frequency of 20MHz, delivering up to 20 MIPS throughput. The microcontroller includes a 10-bit ADC with 8 channels, six PWM channels, and peripherals such as brown-out detection, power-on reset, and watchdog timer. Connectivity options include I²C, SPI, and UART/USART interfaces. The device is designed for industrial temperature range (-40°C to 85°C) and operates from 1.8V to 5.5V supply voltage. It is packaged in a 44-TQFP (10x10mm) surface mount package. Typical applications include industrial control, automation, sensor interfacing, and embedded systems requiring a balance of processing power and low power consumption.