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| PartNumber | ATMEGA644PA-AN | ATMEGA644PA-AU | ATMEGA644PA-ANR |
| Description | 8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP | 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | TQFP-44 | TQFP-44 | TQFP-44 |
| Series | ATmega644 | ATmega644 | ATmega644 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 64 kB | 64 kB | - |
| Data RAM Size | 4 kB | 4 kB | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 32 I/O | 32 I/O | - |
| Operating Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 105 C | + 85 C | - |
| Packaging | Tray | Tray | Reel |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | - |
| Data ROM Size | 2 kB | - | - |
| Data ROM Type | EEPROM | - | - |
| Interface Type | I2C, SPI, USART | SPI, TWI, UART | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 8 Channel | - | - |
| Number of Timers/Counters | 2 x 8 bit, 1 x 16 bit | - | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 160 | 2000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 1.8 V | - | - |
| Tradename | AVR | AVR | AVR |
| Watchdog Timers | Watchdog Timer | - | - |
| Processor Series | - | megaAVR | megaAVR |
| Unit Weight | - | 0.077603 oz | - |
| Manufacturer | Part # | Description | RFQ |
|---|---|---|---|
Microchip Technology / Atmel |
ATMEGA644PA-AN | 8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP | |
| ATMEGA644PA-MUR | 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND | ||
| ATMEGA644PA-AU | 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA-AUR | 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND | ||
| ATMEGA644PA-PU | 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA-MU | 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA-ANR | 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C | ||
| ATMEGA644PA-MNR | 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C | ||
| ATMEGA644PA-MN | 8-bit Microcontrollers - MCU AVR 64 KB FL 2 KB EE 4KB RAM 16 MHZ GRN | ||
| ATMEGA644PA-AN | 16 MHZ, 105C, GREEN, TQFP | ||
| ATMEGA644PA-MNR | Microcontrollers - MCU 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C | ||
| ATMEGA644PA-MUR | Microcontrollers - MCU 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND | ||
| ATMEGA644PA-ANR | Microcontrollers - MCU 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C | ||
| ATMEGA644PA-AUR | Microcontrollers - MCU 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND | ||
| ATMEGA644PA-MN | Microcontrollers - MCU 8-bit Microcontrollers - MCU AVR 64 KB FL 2 KB EE 4KB RAM 16 MHZ GRN | ||
| ATMEGA644PA-PU | Microcontrollers - MCU 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA-MU | Microcontrollers - MCU 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA-AU | Microcontrollers - MCU 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins | ||
| ATMEGA644PA | New and Original |