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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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Part #

8-bit Microcontrollers - MCU 64kB Flash 4kB EEPROM 86 I/O Pins

ATMEGA640-16AU
Microchip Technology
1: $15.93
1,071In Stock

Mfr. Part #
ATMEGA640-16AU

Mouser Part #
556-ATMEGA640-16AU

Microchip Technology

8-bit Microcontrollers - MCU 64kB Flash 4kB EEPROM 86 I/O Pins

Datasheet

1,071In Stock

$15.93

$14.62

$13.24

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-AU
Microchip Technology
1: $8.57
696In Stock

Mfr. Part #
ATMEGA644A-AU

Mouser Part #
556-ATMEGA644A-AU

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Datasheet

696In Stock

$8.57

$7.84

$7.10

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

ATMEGA644P-20AU
Microchip Technology
1: $10.93
845In Stock

Mfr. Part #
ATMEGA644P-20AU

Mouser Part #
556-ATMEGA644P-20AU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

Datasheet

845In Stock

$10.93

$10.01

$9.05

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

ATMEGA644P-20MU
Microchip Technology
1: $10.93
1,116In Stock

Mfr. Part #
ATMEGA644P-20MU

Mouser Part #
556-ATMEGA644P-20MU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

Datasheet

1,116In Stock

$10.93

$10.01

$9.05

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP

ATMEGA644PA-AN
Microchip Technology
1: $10.42
780In Stock

Mfr. Part #
ATMEGA644PA-AN

Mouser Part #
556-ATMEGA644PA-AN

Microchip Technology

8-bit Microcontrollers - MCU 16 MHz, 105C, Green, TQFP

Datasheet

780In Stock

$10.42

$9.53

$8.63

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND

ATMEGA644PA-AUR
Microchip Technology
1: $10.23
1,337In Stock

Mfr. Part #
ATMEGA644PA-AUR

Mouser Part #
556-ATMEGA644PA-AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-20MHz IND

Datasheet

1,337In Stock

Cut Tape

$10.23

$9.38

$8.49

Reel

$8.49

MouseReel Available

Min.: 1
Mult.: 1

Reel: 2,000

8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins

ATMEGA644PA-MU
Microchip Technology
1: $9.98
684In Stock

Mfr. Part #
ATMEGA644PA-MU

Mouser Part #
556-ATMEGA644PA-MU

Microchip Technology

8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins

Datasheet

684In Stock

$9.98

$9.16

$8.31

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins

ATMEGA644PA-PU
Microchip Technology
1: $10.63
925In Stock

Mfr. Part #
ATMEGA644PA-PU

Mouser Part #
556-ATMEGA644PA-PU

Microchip Technology

8-bit Microcontrollers - MCU 64K Flash 2K EEPROM 4K SRAM 32 IO Pins

Datasheet

925In Stock

$10.63

$9.72

$8.82

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC-10MHZ

ATMEGA644PV-10AU
Microchip Technology
1: $10.93
458In Stock

Mfr. Part #
ATMEGA644PV-10AU

Mouser Part #
556-ATMEGA644PV10AU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC-10MHZ

Datasheet

458In Stock

$10.93

$10.01

$9.05

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

ATMEGA649A-AUR
Microchip Technology
1: $11.18
1,925In Stock

Mfr. Part #
ATMEGA649A-AUR

Mouser Part #
556-ATMEGA649A-AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

Datasheet

1,925In Stock

Cut Tape

$11.18

$10.25

$9.28

Reel

$9.28

Min.: 1
Mult.: 1

Reel: 1,000

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz IND

ATMEGA64A-AUR
Microchip Technology
1: $9.18
299In Stock

Mfr. Part #
ATMEGA64A-AUR

Mouser Part #
556-ATMEGA64A-AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz IND

Datasheet

299In Stock

Cut Tape

$9.18

$8.43

$7.63

Reel

$7.63

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

8-bit Microcontrollers - MCU 16 MHz, 85DEG

ATMEGA64M1-MU
Microchip Technology
1: $10.68
841In Stock

Mfr. Part #
ATMEGA64M1-MU

Mouser Part #
556-ATMEGA64M1-MU

Microchip Technology

8-bit Microcontrollers - MCU 16 MHz, 85DEG

Datasheet

841In Stock

$10.68

$9.80

$8.90

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

ATMEGA644P-20PU
Microchip Technology
1: $11.61
516In Stock

Mfr. Part #
ATMEGA644P-20PU

Mouser Part #
556-ATMEGA644P-20PU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE 20MHZ 5V

Datasheet

516In Stock

$11.61

$10.63

$9.64

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHZ 5V

ATMEGA64-16AUR
Microchip Technology
1: $16.26
148In Stock
1,000Expected 2026-04-20

Mfr. Part #
ATMEGA64-16AUR

Mouser Part #
556-ATMEGA64-16AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHZ 5V

Datasheet

148In Stock

1,000Expected 2026-04-20

Cut Tape

$16.26

$14.91

$13.50

Reel

$13.50

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC

ATMEGA64-16MU
Microchip Technology
1: $15.97
25In Stock

Mfr. Part #
ATMEGA64-16MU

Mouser Part #
556-ATMEGA64-16MU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC

Datasheet

25In Stock

$15.97

$14.66

$13.27

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLSH 8K SRAM 4KB EE-8MHZ 1.8V IND

ATMEGA640V-8AUR
Microchip Technology
1: $16.24
1,174In Stock

Mfr. Part #
ATMEGA640V-8AUR

Mouser Part #
556-ATMEGA640V-8AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLSH 8K SRAM 4KB EE-8MHZ 1.8V IND

Datasheet

1,174In Stock

Cut Tape

$16.24

$14.88

$13.49

Reel

$13.49

Min.: 1
Mult.: 1

Reel: 1,500

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE-20MHZ 5V IND

ATMEGA644-20AUR
Microchip Technology
1: $10.88
13In Stock
4,000Expected 2026-02-19

Mfr. Part #
ATMEGA644-20AUR

Mouser Part #
556-ATMEGA644-20AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE-20MHZ 5V IND

Datasheet

13In Stock

4,000Expected 2026-02-19

Cut Tape

$10.88

$9.97

$9.01

Reel

$9.01

Min.: 1
Mult.: 1

Reel: 2,000

8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins

ATMEGA644-20PU
Microchip Technology
1: $11.32
57In Stock

Mfr. Part #
ATMEGA644-20PU

Mouser Part #
556-ATMEGA644-20PU

Microchip Technology

8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins

Datasheet

57In Stock

$11.32

$10.35

$9.38

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-MU
Microchip Technology
1: $8.57
93In Stock

Mfr. Part #
ATMEGA644A-MU

Mouser Part #
556-ATMEGA644A-MU

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Datasheet

93In Stock

$8.57

$7.84

$7.10

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-PU
Microchip Technology
1: $9.15
235In Stock
280Expected 2026-03-19

Mfr. Part #
ATMEGA644A-PU

Mouser Part #
556-ATMEGA644A-PU

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Datasheet

235In Stock

280Expected 2026-03-19

$9.15

$8.37

$7.58

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM

ATMEGA644PV-10MU
Microchip Technology
1: $10.93
200In Stock

Mfr. Part #
ATMEGA644PV-10MU

Mouser Part #
556-ATMEGA644PV-10MU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM

Datasheet

200In Stock

$10.93

$10.01

$9.05

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

ATMEGA645A-AU
Microchip Technology
1: $9.89
94In Stock

Mfr. Part #
ATMEGA645A-AU

Mouser Part #
556-ATMEGA645A-AU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

Datasheet

94In Stock

$9.89

$9.08

$8.22

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

ATMEGA649A-AU
Microchip Technology
1: $10.90
26In Stock

Mfr. Part #
ATMEGA649A-AU

Mouser Part #
556-ATMEGA649A-AU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND

Datasheet

26In Stock

$10.90

$9.98

$9.04

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins

ATMEGA64L-8AU
Microchip Technology
1: $15.97
22In Stock
360Expected 2026-04-16

Mfr. Part #
ATMEGA64L-8AU

Mouser Part #
556-ATMEGA64L-8AU

Microchip Technology

8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins

Datasheet

22In Stock

360Expected 2026-04-16

$15.97

$14.66

$13.27

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND

ATMEGA64L-8AUR
Microchip Technology
1: $16.26
11In Stock

Mfr. Part #
ATMEGA64L-8AUR

Mouser Part #
556-ATMEGA64L-8AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-8MHz, IND

Datasheet

11In Stock

Cut Tape

$16.26

$14.91

$13.50

Reel

$13.50

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,000