Microchip, 8bit AVR, ATmega Microcontroller, 20MHz, 64 kB Flash, 44-Pin TQFP

RS Stock No.:: 131-0323
Distrelec Article No.:: 301-13-663
Mfr. Part No.:: ATMEGA644PA-AU
Manufacturer:: Microchip

Microchip, 8bit AVR, ATmega Microcontroller, 20MHz, 64 kB Flash, 44-Pin TQFP

Bulk discount available

Subtotal (1 unit)*

SGD8.46

(exc. GST)

SGD9.22

(inc. GST)

FREE delivery for orders over $150, or create a business account to enjoy free delivery from just $28

In Stock

Plus 152 unit(s) shipping from 08 December 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 - 24	SGD8.46
25 - 99	SGD8.21
100 +	SGD7.95

*price indicative

RS Stock No.:: 131-0323
Distrelec Article No.:: 301-13-663
Mfr. Part No.:: ATMEGA644PA-AU
Manufacturer:: Microchip

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Microchip
	Family Name	ATmega
	Package Type	TQFP
	Mounting Type	Surface Mount
	Pin Count	44
	Device Core	AVR
	Data Bus Width	8bit
	Program Memory Size	64 kB
	Maximum Frequency	20MHz
	RAM Size	4 kB
	USB Channels	0
	Number of PWM Units	1
	Number of SPI Channels	3
	Number of USART Channels	2
	Typical Operating Supply Voltage	1.8 → 5.5 V
	Number of I2C Channels	1
	Number of UART Channels	2
	Number of CAN Channels	0
	Length	10.1mm
	Number of ADC Units	1
	Maximum Number of Ethernet Channels	0
	Maximum Operating Temperature	+85 °C
	ADCs	8 x 10 bit
	Minimum Operating Temperature	-40 °C
	Instruction Set Architecture	RISC
	Program Memory Type	Flash
	Number of PCI Channels	0
	Number of Ethernet Channels	0
	Pulse Width Modulation	1 (6 Channel)
	Number of LIN Channels	0
	Height	1.05mm
	Dimensions	10.1 x 10.1 x 1.05mm
	Width	10.1mm

	Select all
	Brand Microchip
	Family Name ATmega
	Package Type TQFP
	Mounting Type Surface Mount
	Pin Count 44
	Device Core AVR
	Data Bus Width 8bit
	Program Memory Size 64 kB
	Maximum Frequency 20MHz
	RAM Size 4 kB
	USB Channels 0
	Number of PWM Units 1
	Number of SPI Channels 3
	Number of USART Channels 2
	Typical Operating Supply Voltage 1.8 → 5.5 V
	Number of I2C Channels 1
	Number of UART Channels 2
	Number of CAN Channels 0
	Length 10.1mm
	Number of ADC Units 1
	Maximum Number of Ethernet Channels 0
	Maximum Operating Temperature +85 °C
	ADCs 8 x 10 bit
	Minimum Operating Temperature -40 °C
	Instruction Set Architecture RISC
	Program Memory Type Flash
	Number of PCI Channels 0
	Number of Ethernet Channels 0
	Pulse Width Modulation 1 (6 Channel)
	Number of LIN Channels 0
	Height 1.05mm
	Dimensions 10.1 x 10.1 x 1.05mm
	Width 10.1mm

8-Bit PicoPower megaAVR Family Microcontrollers

This range of megaAVR microcontrollers feature picoPower technology — perfect for energy saving. They offer generous program and data memories with performance of up to 20 MIPS.

Features & Benefits of picoPower megaAVR microcontrollers
•On-chip Flash
•SRAM
•Internal EEPROM
•SPI
•TWI (I²C)
•USART, USB, CAN & LIN interfaces
•Watchdog timer
•Precision oscillator
•GPIO pins
•ADC
•DAC
•Built-in temperature sensor
•Internal voltage reference
•Brown-out detector

Microchip, 8bit AVR, ATmega Microcontroller, 20MHz, 64 kB Flash, 44-Pin TQFP

FREE delivery for orders over $150, or create a business account to enjoy free delivery from just $28

8-Bit PicoPower megaAVR Family Microcontrollers

For these non-cancellable (NC), and non-returnable (NR) products, Terms and Conditions apply.

Related links