8-bit AVR RISC microcontroller featuring 64KB Flash program memory and 4KB RAM. This MCU operates at up to 20 MHz, offering 32 programmable I/Os and 3 timers. Connectivity includes SPI and 2 USART interfaces. Designed for a wide operating voltage range of 2.5V to 5.5V, it functions reliably between -40°C and 85°C. The 44-pin TQFP package houses 8 ADC channels.
PackageTQFP
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Technical Specifications
Microchip ATmega644A-AU technical specifications.
General
| Family Name | ATmega |
| Data Bus Width | 8bit |
| Instruction Set Architecture | RISC |
| Maximum Clock Rate | 20MHz |
| Maximum CPU Frequency | 20MHz |
| Device Core | AVR |
| Program Memory Type | Flash |
| Program Memory Size | 64KB |
| RAM Size | 4KB |
| Number of Programmable I/Os | 32 |
| Core Architecture | AVR |
| Programmability | Yes |
| Number of Timers | 3 |
| Interface Type | SPI/USART |
| CAN | 0 |
| I2C | 0 |
| SPI | 3 |
| Ethernet | 0 |
| UART | 0 |
| USART | 2 |
| USB | 0 |
| I2S | 0 |
| Max Operating Supply Voltage | 5.5V |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 85°C |
| ADC Channels | 8 |
| Number of ADCs | Single |
| Pin Count | 44 |
| Package/Case | TQFP |
| Package Family Name | QFP |
Compliance
| RoHS | Yes |
| RoHS Version | 2011/65/EU, 2015/863 |
Datasheet
Microchip ATmega644A-AU Datasheet
Download the complete datasheet for Microchip ATmega644A-AU to view detailed technical specifications.
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