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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Supply Voltage - Min	Supply Voltage - Max	Maximum Operating Temperature	Packaging
8-bit Microcontrollers - MCU 20 MHz Ind Temp ATMEGA644A-AUR Microchip Technology 1: €4.88 558In Stock	Mfr. Part No. ATMEGA644A-AUR Mouser Part No 556-ATMEGA644A-AUR	Microchip Technology	8-bit Microcontrollers - MCU 20 MHz Ind Temp Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	558In Stock	Cut Tape €4.88 €4.76 Reel €4.05 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
8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V ATMEGA644P-20MU Microchip Technology 1: €6.06 636In Stock	Mfr. Part No. ATMEGA644P-20MU Mouser Part No 556-ATMEGA644P-20MU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	636In Stock	€6.06 €5.56 €5.02	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
8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V ATMEGA644P-20PU Microchip Technology 1: €6.44 288In Stock	Mfr. Part No. ATMEGA644P-20PU Mouser Part No 556-ATMEGA644P-20PU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	288In Stock	€6.44 €5.90 €5.35	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
8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins ATMEGA644PA-AU Microchip Technology 1: €5.54 686In Stock	Mfr. Part No. ATMEGA644PA-AU Mouser Part No 556-ATMEGA644PA-AU	Microchip Technology	8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	686In Stock	€5.54 €5.08 €4.61	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
8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins ATMEGA644PA-MU Microchip Technology 1: €5.54 791In Stock	Mfr. Part No. ATMEGA644PA-MU Mouser Part No 556-ATMEGA644PA-MU	Microchip Technology	8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	791In Stock	€5.54 €5.08 €4.61	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
8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins ATMEGA644PA-PU Microchip Technology 1: €5.90 625In Stock	Mfr. Part No. ATMEGA644PA-PU Mouser Part No 556-ATMEGA644PA-PU	Microchip Technology	8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	625In Stock	€5.90 €5.39 €4.89	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
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-10MHz, 1.8 ATMEGA644PV-10AUR Microchip Technology 1: €6.18 1,000In Stock	Mfr. Part No. ATMEGA644PV-10AUR Mouser Part No 556-ATMEGA644PV10AUR	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-10MHz, 1.8 Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	1,000In Stock	Cut Tape €6.18 €6.02 Reel €5.14	Min.: 1 Mult.: 1 : 2,000	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	Reel, Cut Tape
8-bit Microcontrollers - MCU 16 MHz, 85DEG ATMEGA64M1-MU Microchip Technology 1: €5.93 1,220In Stock	Mfr. Part No. ATMEGA64M1-MU Mouser Part No 556-ATMEGA64M1-MU	Microchip Technology	8-bit Microcontrollers - MCU 16 MHz, 85DEG Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	1,220In Stock	€5.93 €5.44 €4.94	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
8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP ATMEGA644PA-AN Microchip Technology 1: €5.78 735In Stock	Mfr. Part No. ATMEGA644PA-AN Mouser Part No 556-ATMEGA644PA-AN	Microchip Technology	8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	735In Stock	€5.78 €5.29 €4.79	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
8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins ATMEGA644V-10AU Microchip Technology 1: €5.90 432In Stock	Mfr. Part No. ATMEGA644V-10AU Mouser Part No 556-ATMEGA644V10AU	Microchip Technology	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	432In Stock	€5.90 €5.42 €4.91	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
8-bit Microcontrollers - MCU 64K Flsh 2K EEPROM 4K SRAM 16MHz ATMEGA64A-AU Microchip Technology 1: €4.95 2,270In Stock 2,160Expected 12/04/2027	Mfr. Part No. ATMEGA64A-AU Mouser Part No 556-ATMEGA64A-AU	Microchip Technology	8-bit Microcontrollers - MCU 64K Flsh 2K EEPROM 4K SRAM 16MHz Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	2,270In Stock 2,160Expected 12/04/2027	€4.95 €4.54 €4.11	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
8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC ATMEGA64-16MU Microchip Technology 1: €8.86 25In Stock	Mfr. Part No. ATMEGA64-16MU Mouser Part No 556-ATMEGA64-16MU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	25In Stock	€8.86 €8.14 €7.36	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
8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins ATMEGA644-20PU Microchip Technology 1: €6.28 29In Stock 110Expected 03/12/2026	Mfr. Part No. ATMEGA644-20PU Mouser Part No 556-ATMEGA644-20PU	Microchip Technology	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	29In Stock 110Expected 03/12/2026	€6.28 €5.74 €5.20	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
8-bit Microcontrollers - MCU 20 MHz Ind Temp ATMEGA644A-PU Microchip Technology 1: €5.07 12In Stock 390Expected 16/11/2026	Mfr. Part No. ATMEGA644A-PU Mouser Part No 556-ATMEGA644A-PU	Microchip Technology	8-bit Microcontrollers - MCU 20 MHz Ind Temp Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	12In Stock 390Expected 16/11/2026	€5.07 €4.64 €4.21	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
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND ATMEGA644PA-AUR Microchip Technology 1: €5.68 65In Stock 4,000Expected 16/10/2026	Mfr. Part No. ATMEGA644PA-AUR Mouser Part No 556-ATMEGA644PA-AUR	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND Learn More about Microchip Technology microchip megaavr 8 bit mcus	Datasheet	65In Stock 4,000Expected 16/10/2026	Cut Tape €5.68 €5.32 €5.28 €5.25 View Reel €4.71 €5.24 €4.71 €4.71 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
8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins ATMEGA644-20AU Microchip Technology 1: €5.90 189In Stock 2,400On Order	Mfr. Part No. ATMEGA644-20AU Mouser Part No 556-ATMEGA644-20AU	Microchip Technology	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	189In Stock 2,400On Order On Order Ship Dates Mfr. No: ATMEGA644-20AU Stock: 189 Can Dispatch Immediately On Order: 960 Expected 11/01/2027 1,440 Expected 16/03/2027 Factory Lead Time: 20 Weeks	€5.90 €5.42 €5.01 €4.91	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
8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V ATMEGA644P-20AQ Microchip Technology 1: €6.18 47In Stock	Mfr. Part No. ATMEGA644P-20AQ Mouser Part No 556-ATMEGA644P-20AQ	Microchip Technology	8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	47In Stock	€6.18 €5.68 €5.14	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
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND ATMEGA645A-AU Microchip Technology 1: €5.49 45In Stock 540Expected 23/11/2026	Mfr. Part No. ATMEGA645A-AU Mouser Part No 556-ATMEGA645A-AU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	45In Stock 540Expected 23/11/2026	€5.49 €5.04 €4.56	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
8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC LCD ATMEGA649-16AU Microchip Technology 1: €8.23 25In Stock	Mfr. Part No. ATMEGA649-16AU Mouser Part No 556-ATMEGA649-16AU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC LCD Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	25In Stock	€8.23 €7.55 €6.84	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	AVR	8 bit	16 MHz	64 kB	4 kB	10 bit	69 I/O	4.5 V	5.5 V	+ 85 C	Tray
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND ATMEGA649A-AU Microchip Technology 1: €6.05 23In Stock	Mfr. Part No. ATMEGA649A-AU Mouser Part No 556-ATMEGA649A-AU	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	23In Stock	€6.05 €5.54 €5.01	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
8-bit Microcontrollers - MCU 16MHz 105C ATMEGA64A-AN Microchip Technology 1: €5.07 258In Stock	Mfr. Part No. ATMEGA64A-AN Mouser Part No 556-ATMEGA64A-AN	Microchip Technology	8-bit Microcontrollers - MCU 16MHz 105C Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	258In Stock	€5.07 €4.64 €4.20	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
8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins ATMEGA64L-8AU Microchip Technology 1: €8.86 43In Stock 180On Order	Mfr. Part No. ATMEGA64L-8AU Mouser Part No 556-ATMEGA64L-8AU	Microchip Technology	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	43In Stock 180On Order On Order Ship Dates Mfr. No: ATMEGA64L-8AU Stock: 43 Can Dispatch Immediately On Order: 90 Expected 19/10/2026 90 Expected 20/10/2026 Factory Lead Time: 28 Weeks	€8.86 €8.14 €7.36	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
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND ATMEGA64L-8AUR Microchip Technology 1: €9.02 15In Stock 2,000Expected 12/02/2027	Mfr. Part No. ATMEGA64L-8AUR Mouser Part No 556-ATMEGA64L-8AUR	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	15In Stock 2,000Expected 12/02/2027	Cut Tape €9.02 €8.80 Reel €7.49 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
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHZ 5V ATMEGA64-16AUR Microchip Technology 1: €9.02 2,000Expected 15/03/2027	Mfr. Part No. ATMEGA64-16AUR Mouser Part No 556-ATMEGA64-16AUR	Microchip Technology	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHZ 5V Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	2,000Expected 15/03/2027	Cut Tape €9.02 €8.80 Reel €7.49 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	4.2 V	5.5 V	+ 85 C	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins ATMEGA64-16AU Microchip Technology 1: €8.86 899Expected 15/02/2027	Mfr. Part No. ATMEGA64-16AU Mouser Part No 556-ATMEGA64-16AU	Microchip Technology	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins Learn More about Microchip Technology microchip atmega644pa mcus	Datasheet	899Expected 15/02/2027	€8.86 €8.14 €7.36	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

ATmega644PA 8-bit AVR® Microcontrollers

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