8-bit Microcontrollers - MCU

.hide-partial { max-height: none; } .show-more { display: none; }

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.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 86

Applied Filters:

Program Memory Size

Data RAM Size

Package / Case

Maximum Clock Frequency

ADC Resolution

Number of I/Os

Supply Voltage - Min

Supply Voltage - Max

Mounting Style

Minimum Operating Temperature

Maximum Operating Temperature

Series

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

8-bit Microcontrollers - MCU 16 MHz, 85DEG

ATMEGA64M1-AU
Microchip Technology
1: S/26.82
26,199In Stock

Mfr. Part #
ATMEGA64M1-AU

Mouser Part #
556-ATMEGA64M1-AU

Microchip Technology

8-bit Microcontrollers - MCU 16 MHz, 85DEG

Learn More

Datasheet

26,199In Stock

S/26.82

S/24.29

S/22.34

S/22.19

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

TQFP-32

16 MHz

10 bit

27 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega64M1

Tray

8-bit Microcontrollers - MCU AVR 64 KB FL 2 KB EE 4KB RAM 16 MHZ GRN

ATMEGA644PA-MN
Microchip Technology
1: S/28.49
366In Stock

Mfr. Part #
ATMEGA644PA-MN

Mouser Part #
556-ATMEGA644PA-MN

Microchip Technology

8-bit Microcontrollers - MCU AVR 64 KB FL 2 KB EE 4KB RAM 16 MHZ GRN

Learn More

Datasheet

366In Stock

S/28.49

S/26.39

S/24.64

S/24.60

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

VQFN-44

20 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Tray

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

ATMEGA644-20MUR
Microchip Technology
1: S/27.33
6,306In Stock

Mfr. Part #
ATMEGA644-20MUR

Mouser Part #
556-ATMEGA644-20MUR

Microchip Technology

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

Learn More

Datasheet

6,306In Stock

Cut Tape

S/27.33

S/26.55

S/25.15

S/25.11

View

Reel

S/22.58

Min.: 1
Mult.: 1

: 4,000

AVR

64 kB

4 kB

VQFN-44

20 MHz

10 bit

32 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Reel, Cut Tape

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-MU
Microchip Technology
1: S/21.53
431In Stock

Mfr. Part #
ATMEGA644A-MU

Mouser Part #
556-ATMEGA644A-MU

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Learn More

Datasheet

431In Stock

S/21.53

S/19.70

S/17.83

Quote

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

VQFN-44

20 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Tray

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

ATMEGA640V-8AU
Microchip Technology
1: S/36.63
805In Stock

Mfr. Part #
ATMEGA640V-8AU

Mouser Part #
556-ATMEGA640V8AU

Microchip Technology

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

Learn More

Datasheet

805In Stock

S/36.63

S/35.19

S/33.20

Min.: 1
Mult.: 1

AVR

64 kB

8 kB

TQFP-100

8 MHz

10 bit

86 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega640

Tray

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

ATMEGA644-20AUR
Microchip Technology
1: S/27.33
3,863In Stock

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

Learn More

Datasheet

3,863In Stock

Cut Tape

S/27.33

S/26.55

S/25.15

S/25.11

S/22.54

Reel

S/22.54

Min.: 1
Mult.: 1

: 2,000

AVR

TQFP-44

20 MHz

2.7 V

5.5 V

SMD/SMT

8 bit

ATmega644

Reel, Cut Tape

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

ATMEGA645-16AU
Microchip Technology
1: S/30.60
267In Stock

Mfr. Part #
ATMEGA645-16AU

Mouser Part #
556-ATMEGA645-16AU

Microchip Technology

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

Learn More

Datasheet

267In Stock

S/30.60

S/27.99

S/25.38

S/25.34

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

TQFP-64

16 MHz

10 bit

54 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega645

Tray

8-bit Microcontrollers - MCU 16MHz 105C

ATMEGA64A-ANR
Microchip Technology
1: S/23.63
1,662In Stock

Mfr. Part #
ATMEGA64A-ANR

Mouser Part #
556-ATMEGA64A-ANR

Microchip Technology

8-bit Microcontrollers - MCU 16MHz 105C

Learn More

Datasheet

1,662In Stock

Cut Tape

S/23.63

S/22.93

S/20.82

Reel

S/19.58

Quote

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

AVR

64 kB

4 kB

TQFP-64

16 MHz

10 bit

53 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 105 C

ATmega64A

Reel, Cut Tape, MouseReel

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

ATMEGA645A-AUR
Microchip Technology
1: S/25.61
960In Stock

Mfr. Part #
ATMEGA645A-AUR

Mouser Part #
556-ATMEGA645A-AUR

Microchip Technology

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

Learn More

Datasheet

960In Stock

Cut Tape

S/25.61

S/24.95

S/23.59

S/22.65

Reel

S/21.21

Quote

Min.: 1
Mult.: 1

: 1,000

AVR

TQFP-64

16 MHz

1.8 V

5.5 V

SMD/SMT

8 bit

ATmega645A

Reel, Cut Tape

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM LCD16MHz,5

ATMEGA649-16AUR
Microchip Technology
1: S/37.99
2,000In Stock

Mfr. Part #
ATMEGA649-16AUR

Mouser Part #
556-ATMEGA649-16AUR

Microchip Technology

8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM LCD16MHz,5

Learn More

Datasheet

2,000In Stock

Cut Tape

S/37.99

S/33.98

S/33.90

S/33.24

Reel

S/33.20

Min.: 1
Mult.: 1

: 1,000

AVR

64 kB

4 kB

TQFP-64

16 MHz

10 bit

69 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega649

Reel, Cut Tape

8-bit Microcontrollers - MCU 16MHz MLF 105C

ATMEGA64A-MN
Microchip Technology
1: S/22.93
98In Stock

Mfr. Part #
ATMEGA64A-MN

Mouser Part #
556-ATMEGA64A-MN

Microchip Technology

8-bit Microcontrollers - MCU 16MHz MLF 105C

Learn More

Datasheet

98In Stock

S/22.93

S/21.84

S/21.64

S/21.56

View

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

QFN-64

16 MHz

10 bit

53 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 105 C

ATmega64A

Tray

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

ATMEGA644PV-10MU
Microchip Technology
1: S/27.44
200In Stock

Mfr. Part #
ATMEGA644PV-10MU

Mouser Part #
556-ATMEGA644PV-10MU

Microchip Technology

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

Learn More

Datasheet

200In Stock

S/27.44

S/25.15

S/22.73

S/22.69

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

VQFN-44

10 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644P

Tray

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

ATMEGA649-16MU
Microchip Technology
1: S/37.25
258In Stock

Mfr. Part #
ATMEGA649-16MU

Mouser Part #
556-ATMEGA649-16MU

Microchip Technology

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

Learn More

Datasheet

258In Stock

S/37.25

S/34.18

S/30.95

S/30.91

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

MLF-64

16 MHz

10 bit

69 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega649

Tray

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

ATMEGA645P-MU
Microchip Technology
1: S/27.36
1,300In Stock

Mfr. Part #
ATMEGA645P-MU

Mouser Part #
556-ATMEGA645P-MU

Microchip Technology

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

Learn More

Datasheet

1,300In Stock

S/27.36

S/25.07

S/22.69

S/22.58

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

QFN-64

16 MHz

10 bit

54 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega645P

Tray

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

ATMEGA64L-8AQR
Microchip Technology
1: S/41.42
747In Stock

Mfr. Part #
ATMEGA64L-8AQR

Mouser Part #
556-ATMEGA64L-8AQR

Microchip Technology

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

Learn More

Datasheet

747In Stock

Cut Tape

S/41.42

S/40.37

S/40.33

S/40.29

S/37.17

Reel

S/34.33

Min.: 1
Mult.: 1

: 1,000

AVR

64 kB

4 kB

TQFP-64

8 MHz

10 bit

53 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega64

Reel, Cut Tape

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC 1.8V

ATMEGA645V-8AU
Microchip Technology
1: S/30.60
176In Stock

Mfr. Part #
ATMEGA645V-8AU

Mouser Part #
556-ATMEGA645V8AU

Microchip Technology

8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC 1.8V

Learn More

Datasheet

176In Stock

S/30.60

S/28.57

S/28.49

Quote

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

TQFP-64

8 MHz

10 bit

54 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega645

Tray

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

ATMEGA645-16AUR
Microchip Technology
1: S/31.30
748In Stock

Mfr. Part #
ATMEGA645-16AUR

Mouser Part #
556-ATMEGA645-16AUR

Microchip Technology

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

Learn More

Datasheet

748In Stock

Cut Tape

S/31.30

S/28.06

S/28.03

Reel

S/27.95

Quote

Min.: 1
Mult.: 1

: 1,000

AVR

64 kB

4 kB

TQFP-64

16 MHz

10 bit

54 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega645

Reel, Cut Tape

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

ATMEGA644PA-AUR
Microchip Technology
1: S/25.69
2,495In 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

Learn More

Datasheet

2,495In Stock

Cut Tape

S/25.69

S/23.78

S/23.55

S/23.43

View

Reel

S/21.33

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

AVR

64 kB

4 kB

TQFP-44

20 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Reel, Cut Tape, MouseReel

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

ATMEGA64A-MUR
Microchip Technology
1: S/23.04
6,275In Stock

Mfr. Part #
ATMEGA64A-MUR

Mouser Part #
556-ATMEGA64A-MUR

Microchip Technology

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

Learn More

Datasheet

6,275In Stock

Cut Tape

S/23.04

S/22.46

Reel

S/19.15

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

AVR

64 kB

4 kB

VQFN-64

16 MHz

10 bit

53 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega64A

Reel, Cut Tape, MouseReel

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

ATMEGA64L-8MUR
Microchip Technology
1: S/40.87
2,732In Stock

Mfr. Part #
ATMEGA64L-8MUR

Mouser Part #
556-ATMEGA64L-8MUR

Microchip Technology

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

Learn More

Datasheet

2,732In Stock

Cut Tape

S/40.87

S/40.83

Reel

S/38.54

Quote

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

AVR

64 kB

4 kB

MLF-64

8 MHz

10 bit

53 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega64

Reel, Cut Tape, MouseReel

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

ATMEGA640-16AU
Microchip Technology
1: S/40.01
479In Stock

Mfr. Part #
ATMEGA640-16AU

Mouser Part #
556-ATMEGA640-16AU

Microchip Technology

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

Learn More

Datasheet

479In Stock

S/40.01

Min.: 1
Mult.: 1

AVR

64 kB

8 kB

TQFP-100

16 MHz

10 bit

86 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega640

Tray

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

ATMEGA640-16AUR
Microchip Technology
1: S/40.79
679In Stock

Mfr. Part #
ATMEGA640-16AUR

Mouser Part #
556-ATMEGA640-16AUR

Microchip Technology

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

Learn More

Datasheet

679In Stock

Cut Tape

S/40.79

S/37.56

S/37.17

S/36.90

View

Reel

S/33.75

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

AVR

64 kB

8 kB

TQFP-100

16 MHz

10 bit

86 I/O

2.7 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega640

Reel, Cut Tape, MouseReel

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

ATMEGA640V-8AUR
Microchip Technology
1: S/40.79
872In 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

Learn More

Datasheet

872In Stock

Cut Tape

S/40.79

S/39.74

S/33.86

Reel

S/33.86

Min.: 1
Mult.: 1

: 1,500

AVR

TQFP-100

8 MHz

1.8 V

5.5 V

SMD/SMT

8 bit

ATmega640

Reel, Cut Tape

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-AU
Microchip Technology
1: S/21.53
953In Stock
2,080Expected 9/28/2026

Mfr. Part #
ATMEGA644A-AU

Mouser Part #
556-ATMEGA644A-AU

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Learn More

Datasheet

953In Stock

2,080Expected 9/28/2026

S/21.53

S/19.70

S/17.83

Min.: 1
Mult.: 1

AVR

64 kB

4 kB

TQFP-44

20 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Tray

8-bit Microcontrollers - MCU 20 MHz Ind Temp

ATMEGA644A-AUR
Microchip Technology
1: S/22.07
558In Stock

Mfr. Part #
ATMEGA644A-AUR

Mouser Part #
556-ATMEGA644A-AUR

Microchip Technology

8-bit Microcontrollers - MCU 20 MHz Ind Temp

Learn More

Datasheet

558In Stock

Cut Tape

S/22.07

S/21.56

S/18.33

Reel

S/18.33

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

AVR

64 kB

4 kB

TQFP-44

20 MHz

10 bit

32 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

ATmega644

Reel, Cut Tape, MouseReel

ATmega644PA 8-bit AVR® Microcontrollers

Customer Service Office

Company

Resources

Support