8-bit AVR microcontroller featuring 64KB FLASH memory and 4KB RAM. Operates at up to 20MHz with an 8-bit data bus width. Offers I2C, SPI, and UART/USART interfaces, with 32 programmable I/O pins. Includes 3 timers/counters, a watchdog timer, and peripherals like Brown-out Detect/Reset and PWM. Packaged in a 44-TQFP surface mount with tin/matte contact plating, operating from 1.8V to 5.5V.
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Microchip ATMEGA644PA-ANR technical specifications.
| Package/Case | TQFP |
| Contact Plating | Tin, Matte |
| Core Architecture | AVR |
| Data Bus Width | 8b |
| Frequency | 20MHz |
| Interface | I2C, SPI, UART, USART |
| Max Frequency | 20MHz |
| Max Operating Temperature | 105°C |
| Max Supply Voltage | 5.5V |
| Memory Size | 64KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Min Supply Voltage | 1.8V |
| Mount | Surface Mount |
| Number of I/Os | 32 |
| Number of Programmable I/O | 32 |
| Number of Timers/Counters | 3 |
| Operating Supply Voltage | 5V |
| Oscillator Type | Internal |
| Package Quantity | 1 |
| Packaging | Tape and Reel |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| RAM Size | 4KB |
| RoHS Compliant | No |
| Series | AVR® ATmega |
| Watchdog Timer | Yes |
| RoHS | Not Compliant |
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