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.

Types of Microcontrollers - MCU
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Maximum Clock Frequency
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Supply Voltage - Max
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Packaging
Microchip Technology 8-bit Microcontrollers - MCU 16 MHz, 85DEG
Datasheet
26,199In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-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 AVR 64K FLSH 4K SRAM 2KB EE-20MHZ 5V IND
Datasheet
6,306In Stock
Min.: 1
Mult.: 1
: 4,000

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 Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU 20 MHz Ind Temp
Datasheet
431In Stock
Min.: 1
Mult.: 1

SMD/SMT VQFN-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 64K FLSH 8K SRAM 4KB EE-8MHZ 1.8V
Datasheet
805In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-100 AVR 8 bit 8 MHz 64 kB 8 kB 10 bit 86 I/O 1.8 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE-20MHZ 5V IND
Datasheet
3,863In Stock
Min.: 1
Mult.: 1
: 2,000

SMD/SMT TQFP-44 AVR 8 bit 20 MHz 2.7 V 5.5 V Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM LCD16MHz,5
Datasheet
2,000In Stock
Min.: 1
Mult.: 1
: 1,000

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 69 I/O 2.7 V 5.5 V + 85 C Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU 16MHz 105C
Datasheet
1,662In 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 + 105 C Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins
Datasheet
267In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 54 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 16MHz MLF 105C
Datasheet
98In Stock
Min.: 1
Mult.: 1

SMD/SMT QFN-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 AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND
Datasheet
960In Stock
Min.: 1
Mult.: 1
: 1,000

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 1.8 V 5.5 V Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU AVR 64 KB FL 2 KB EE 4KB RAM 16 MHZ GRN
Datasheet
6In Stock
360Expected 2026/10/08
Min.: 1
Mult.: 1

SMD/SMT VQFN-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 SRAM-16MHz, IND
Datasheet
1,300In Stock
Min.: 1
Mult.: 1

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

Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC LCD
Datasheet
258In Stock
Min.: 1
Mult.: 1

SMD/SMT MLF-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 69 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM
Datasheet
200In Stock
Min.: 1
Mult.: 1

SMD/SMT VQFN-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-8MHz, EXT
Datasheet
747In Stock
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
Microchip Technology 8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz, 5V
Datasheet
748In Stock
Min.: 1
Mult.: 1
: 1,000

SMD/SMT TQFP-64 AVR 8 bit 16 MHz 64 kB 4 kB 10 bit 54 I/O 2.7 V 5.5 V + 85 C Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC 1.8V
Datasheet
176In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-64 AVR 8 bit 8 MHz 64 kB 4 kB 10 bit 54 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
2,495In 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 AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz, IND
Datasheet
6,275In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

SMD/SMT VQFN-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 AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND
Datasheet
2,732In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

SMD/SMT MLF-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 64kB Flash 4kB EEPROM 86 I/O Pins
Datasheet
479In Stock
Min.: 1
Mult.: 1

SMD/SMT TQFP-100 AVR 8 bit 16 MHz 64 kB 8 kB 10 bit 86 I/O 2.7 V 5.5 V + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU AVR 64K FLSH 8K SRAM 4KB EE-16MHZ 5V IND
Datasheet
679In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

SMD/SMT TQFP-100 AVR 8 bit 16 MHz 64 kB 8 kB 10 bit 86 I/O 2.7 V 5.5 V + 85 C Reel, Cut Tape, MouseReel
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
953In Stock
2,080Expected 2026/09/28
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