ATmega644PA 8-bit AVR® Microcontrollers

Microchip ATmega644PA 8-bit AVR® CMOS Microcontrollers are low-power and based on the AVR® enhanced RISC architecture. The Atmel ATmega644PA is a powerful 8-bit microcontroller, that offers excellent flexibility and a cost-effective solution to a wide range of embedded control applications.

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Data Bus Width
Maximum Clock Frequency
Program Memory Size
Data RAM Size
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Number of I/Os
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Supply Voltage - Max
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Packaging
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 8K SRAM 4KB EE-8MHZ 1.8V IND
Datasheet
872In Stock
Min.: 1
Mult.: 1
: 1.500

SMD/SMT TQFP-100 AVR 8 bit 8 MHz 1.8 V 5.5 V Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU 20 MHz Ind Temp
Datasheet
1.104In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 20 MHz Ind Temp
Datasheet
558In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 20 MHz Ind Temp
Datasheet
495In Stock
Min.: 1
Mult.: 1

Through Hole PDIP-40 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tube
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V
Datasheet
696In Stock
Min.: 1
Mult.: 1

SMD/SMT VQFN-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V
Datasheet
355In Stock
Min.: 1
Mult.: 1

Through Hole PDIP-40 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 2.7 V 5.5 V + 85 C Tube
Microchip Technology 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins
Datasheet
686In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND
Datasheet
1.932In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins
Datasheet
915In Stock
Min.: 1
Mult.: 1

SMD/SMT QFN-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins
Datasheet
667In Stock
Min.: 1
Mult.: 1

Through Hole PDIP-40 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tube

Microchip Technology 8-bit Microcontrollers - MCU 16 MHz, 85DEG
Datasheet
1.253In Stock
Min.: 1
Mult.: 1

SMD/SMT QFN-32 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 27 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins
Datasheet
801In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 53 I/O 4.2 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins
Datasheet
1.701In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP
Datasheet
255In Stock
480Expected 10/26/2026
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins
Datasheet
582In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 10 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 16MHz 105C
Datasheet
363In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 53 I/O 2.7 V 5.5 V + 105 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64K Flsh 2K EEPROM 4K SRAM 16MHz
Datasheet
1.219In Stock
2.160Expected 10/19/2026
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 53 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz IND
Datasheet
2.000In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 53 I/O 2.7 V 5.5 V + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins
Datasheet
227In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 8 MHz 64 kB 4 kB 10 bit 53 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND
Datasheet
682In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.000

SMD/SMT TQFP-64 AVR 8 bit 8 MHz 64 kB 4 kB 10 bit 53 I/O 2.7 V 5.5 V + 85 C Reel, Cut Tape, MouseReel

Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC
Datasheet
25In Stock
Min.: 1
Mult.: 1

SMD/SMT QFN-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 53 I/O 4.5 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins
Datasheet
119In Stock
Min.: 1
Mult.: 1

Through Hole PDIP-40 AVR 8 bit 20 MHz 64 kB 4 kB 10 bit 32 I/O 2.7 V 5.5 V + 85 C Tube
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V
Datasheet
47In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 64 kB 4 kB 32 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC-10MHZ
Datasheet
222In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-44 AVR 8 bit 10 MHz 64 kB 4 kB 10 bit 32 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND
Datasheet
49In Stock
540Expected 10/26/2026
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 54 I/O 1.8 V 5.5 V + 85 C Tray