Mfr Part #:

ATMEGA644P-20MU

Mfr Name: Atmel

Atmel ATMEGA644P-20MU is an 8-bit AVR microcontroller with 64KB Flash, 4KB SRAM, 2KB EEPROM, operating at up to 20MHz, in a 44-VQFN package.

✓ Total Stock: 22,600 pcs

ATMEGA644P-20MU Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	22,600 pcs On Request	22600 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

ATMEGA644P-20MU Description

Short technical summary and product information.

The Atmel ATMEGA644P-20MU is a high-performance, low-power 8-bit AVR microcontroller based on the AVR enhanced RISC architecture. It features 64KB of in-system self-programmable Flash memory, 4KB of internal SRAM, and 2KB of EEPROM, with endurance of 10,000 write/erase cycles for Flash and 100,000 for EEPROM. The device operates at a maximum frequency of 20MHz, achieving up to 20 MIPS throughput, and includes a rich set of peripherals: two 8-bit and one 16-bit timer, six PWM channels, an 8-channel 10-bit ADC with differential modes, and multiple serial interfaces (I2C, SPI, dual USART).

The microcontroller is housed in a 44-VFQFN exposed pad package (44-VQFN, 7x7mm) and is designed for surface mount assembly. It operates over an industrial temperature range of -40°C to 85°C and supports a supply voltage range of 2.7V to 5.5V, with full 20MHz operation requiring 4.5V to 5.5V. Low-power features include multiple sleep modes and picoPower technology, making it suitable for battery-powered and industrial applications.

The device is RoHS3 compliant and REACH unaffected, as stated on the manufacturer page. It is ideal for embedded control systems, sensor interfaces, and industrial automation.

ATMEGA644P-20MU Quick Information

Product Type: Microcontroller

Series: ATmega644P

Canonical Name: ATMEGA644P-20MU 8-bit AVR Microcontroller

Subcategory: 8-bit

ATMEGA644P-20MU Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

ATMEGA644P-20MU Features

8-bit AVR RISC core with 20MHz clock speed.
64KB Flash and 4KB SRAM memory.
Six PWM channels for motor control.
8-channel 10-bit ADC for analog inputs.
Industrial temperature range -40°C to 85°C.

ATMEGA644P-20MU Applications

Industrial automation and control systems.
Sensor data acquisition and processing.
Embedded IoT edge devices.
Battery-powered portable instruments.

ATMEGA644P-20MU FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage range of the ATMEGA644P-20MU?

The device operates from 2.7V to 5.5V, but full 20MHz speed requires 4.5V to 5.5V.

What is the maximum clock speed?

The maximum clock frequency is 20MHz, requiring 4.5-5.5V supply.

How much Flash memory does it have?

64KB of Flash program memory, organized as 32K x 16 bits.

What is the package type?

44-VFQFN exposed pad, also known as 44-VQFN (7x7mm).

Is the device RoHS compliant?

Yes, RoHS3 compliant as stated on the manufacturer page.

What is the operating temperature range?

-40°C to 85°C (industrial).

What communication interfaces are available?

I2C, SPI, and dual UART/USART.

ATMEGA644P-20MU Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.

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ATMEGA644P-20MUR

Microchip Technology

The ATMEGA644P-20MUR is an 8-bit AVR microcontroller from Microchip Technology featuring 64KB flash memory, 20MHz operation, and I2C, SPI, and UART/USART connectivity. It is housed in a 44-VQFN package.

View Part

ATMEGA644-20MU

Atmel

The ATMEGA644-20MU is an 8-bit AVR microcontroller from Microchip Technology with 64KB Flash, 4KB RAM, and 2KB EEPROM. It operates at up to 20MHz and includes I2C, SPI, and UART/USART connectivity.