ATMEGA644P-20MQR 8-bit AVR microcontroller with 64KB Flash memory, 4KB RAM, and 2KB EEPROM. Operates at up to 20 MHz with 2.7V to 5.5V supply.
Mfr Part #:

ATMEGA644P-20MQR

Available from 1 distributors
Mfr Name: Microchip Technology
Microchip Technology
8-bit AVR microcontroller with 64KB Flash memory, 4KB RAM, and 2KB EEPROM. Operates at up to 20 MHz with 2.7V to 5.5V supply.
✓ Total Stock: 21,513 pcs

ATMEGA644P-20MQR Available from 1 distributor

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
21,513 pcs
21513 pcs On Request 1 On Request On Request 2020+ On Request On Request

ATMEGA644P-20MQR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Connectivity
Core Processor
Core Size
Data Converters
EEPROM Size
Industrial Grade
Mounting Type
Number of I
Operating Temperature
Oscillator Type
Peripherals
Program Memory Size
Program Memory Type
RAM Size
SVHC Present
Speed
Supplier Device Package
Voltage

ATMEGA644P-20MQR Description

Short technical summary and product information.

The ATMEGA644P-20MQR is an 8-bit AVR microcontroller from Microchip Technology based on the AVR enhanced RISC architecture. It features 64KB of Flash program memory, 4KB of SRAM, and 2KB of EEPROM, providing ample storage for embedded control applications. The device operates at a maximum speed of 20 MHz, delivering up to 20 MIPS throughput.

 

With 32 general-purpose I/O lines, the microcontroller supports connectivity via I²C, SPI, and UART/USART interfaces. It includes an 8-channel 10-bit analog-to-digital converter (ADC) and six PWM channels, along with peripherals such as brown-out detection, power-on reset, and watchdog timer. The operating voltage range is 2.7V to 5.5V, and the temperature range is -40°C to 105°C.

 

The device is offered in a 44-VFQFN exposed pad package (44-VQFN, 7x7 mm) for surface mount assembly. This combination of features makes it suitable for a wide range of embedded systems requiring low power consumption and high performance.

ATMEGA644P-20MQR Quick Information

Product Type: Microcontroller
Series: ATmega
Canonical Name: Microchip Technology ATMEGA644P-20MQR 8-bit AVR Microcontroller
Subcategory: 8-bit Microcontroller

ATMEGA644P-20MQR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

ATMEGA644P-20MQR Features

  • 8-bit AVR RISC architecture with 20MHz max speed.
  • 64KB Flash and 4KB SRAM onboard memory.
  • 32 I/O lines with I2C, SPI, and UART connectivity.
  • 8-channel 10-bit ADC for analog input.
  • Operates from 2.7V to 5.5V supply.

ATMEGA644P-20MQR Applications

  • Used in industrial control systems.
  • Suitable for automotive sensor modules.
  • Ideal for embedded IoT devices.
  • Applied in consumer electronics.

ATMEGA644P-20MQR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range?

2.7V to 5.5V.

What is the package type?

44-VFQFN Exposed Pad (supplier device package 44-VQFN, 7x7 mm).

What is the operating temperature range?

-40°C to 105°C.

Is it RoHS compliant?

Yes, RoHS3 compliant (unverified, low confidence).

What is the core processor?

AVR 8-bit.

How much program memory does it have?

64KB Flash.

How many I/O pins?

32.

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