Microcontrollers

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	DigiKey Programmable	Core Processor	Core Size	Speed	Connectivity	Peripherals	Number of I/O	Program Memory Size	Program Memory Type	EEPROM Size	RAM Size	Voltage - Supply (Vcc/Vdd)	Data Converters	Oscillator Type	Operating Temperature	Mounting Type	Supplier Device Package	Package / Case
ATMEGA328-AU IC MCU 8BIT 32KB FLASH 32TQFP Microchip Technology	3,236 In Stock	1 : $3.85000 Tray	AVR® ATmega	Tray	Active	Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	32-TQFP (7x7)	32-TQFP
ATMEGA328-AUR IC MCU 8BIT 32KB FLASH 32TQFP Microchip Technology	16,286 In Stock	1 : $3.99000 Cut Tape (CT) 2,000 : $3.33669 Tape & Reel (TR)	AVR® ATmega	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	32-TQFP (7x7)	32-TQFP
ATMEGA328-PU IC MCU 8BIT 32KB FLASH 28DIP Microchip Technology	19,845 In Stock	1 : $4.18000 Tube	AVR® ATmega	Tube	Active	Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 6x10b	Internal	-40°C ~ 85°C (TA)	Through Hole	28-PDIP	28-DIP (0.300", 7.62mm)
ATMEGA328-MU IC MCU 8BIT 32KB FLASH 32VQFN Microchip Technology	3,447 In Stock	1 : $3.85000 Tray	AVR® ATmega	Tray	Active	Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	32-VQFN (5x5)	32-VFQFN Exposed Pad
ATMEGA328-MUR IC MCU 8BIT 32KB FLASH 32VQFN Microchip Technology	17,318 In Stock	1 : $3.99000 Cut Tape (CT) 6,000 : $3.33668 Tape & Reel (TR)	AVR® ATmega	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	32-VQFN (5x5)	32-VFQFN Exposed Pad
ATMEGA328-MMH IC MCU 8BIT 32KB FLASH 28VQFN Microchip Technology	7,928 In Stock	1 : $4.04000 Tray	AVR® ATmega	Tray	Active	Not Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	28-VQFN (4x4)	28-VFQFN Exposed Pad
ATMEGA328-MMHR IC MCU 8BIT 32KB FLASH 28VQFN Microchip Technology	2,484 In Stock	1 : $4.16000 Cut Tape (CT) 6,000 : $3.46381 Tape & Reel (TR)	AVR® ATmega	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	AVR	8-Bit	20MHz	I2C, SPI, UART/USART	Brown-out Detect/Reset, POR, PWM, WDT	23	32KB (16K x 16)	FLASH	1K x 8	2K x 8	1.8V ~ 5.5V	A/D 8x10b	Internal	-40°C ~ 85°C (TA)	Surface Mount	28-VQFN (4x4)	28-VFQFN Exposed Pad

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Microcontroller products are relatively complex, user-programmable digital logic devices. Closely related to devices considered microprocessors, the distinction between the two reduces largely to the manufacturer's choice of noun, though by tradition microcontrollers integrate working memory, are more likely to incorporate mixed-signal peripherals and tend to be used with simpler software paradigms oriented toward repetitive execution of a predefined series of tasks.