ATMEGA644A-MU

Images are for reference only

ATMEGA644A-MU

IC MCU 8BIT 64KB FLASH 44VQFN

100% Original & New

24 Hours ready to ship

365 Days Warranty

RFQ & Get more Discounts

Specifications

Supplier Microchip Technology
Package Tray
Series AVR® ATmega
ProductStatus Active
CoreProcessor AVR
CoreSize 8-Bit
Speed 20MHz
Connectivity I²C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
NumberofI/O 32
ProgramMemorySize 64KB (32K x 16)
ProgramMemoryType FLASH
EEPROMSize 2K x 8
RAMSize 4K x 8
Voltage-Supply(Vcc/Vdd) 1.8V ~ 5.5V
DataConverters A/D 8x10b
OscillatorType Internal
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 44-VFQFN Exposed Pad

Overview

Description

ATmega644A-MU is an 8-bit AVR microcontroller from Atmel (now Microchip) in a 40-pin MU package. It uses the AVR RISC core, offering straightforward, low-power embedded control with good peripherals for mid-range projects.
Key features:
- 64 KB Flash program memory, 4 KB SRAM, 2 KB EEPROM
- Clocking up to 16 MHz (internal RC or external crystal)
- Peripherals: USART, SPI, I2C/TWI, 8-channel 10-bit ADC, PWM outputs, and three timers (two 8-bit, one 16-bit)
- About 32 I/O pins in the 40-pin package, plus analog comparators and external interrupts
- Power-saving sleep modes, watchdog timer, brown-out detection
- In-system programming via SPI; widely supported by AVR toolchains
Intended use: general-purpose embedded control, data acquisition, sensor interfacing, and hobbyist/mid-range projects requiring moderate memory and peripheral density.

Features

ATmega644A-MU is a 8‑bit AVR microcontroller in a 44‑pin µQFP (MU) with:
- Core: AVR RISC, 1 cycle per instruction; up to 20 MHz operation (voltage dependent).
- Memory: 64 KB flash, 4 KB SRAM, 2 KB EEPROM.
- I/O: ~32 general‑purpose I/O lines (Ports A–D).
- ADC: 10‑bit, 10‑channel ADC.
- Timers: Timer/Counter0 and Timer/Counter2 (8‑bit) with PWM; Timer/Counter1 (16‑bit) with input capture and PWM.
- Serial peripherals: USART, SPI, and TWI/I2C.
- Power and reset: Brown‑out detector, watchdog timer, multiple sleep modes (Idle, ADC Noise Reduction, Power‑down, Power‑save).
- Programming: In‑system programming (ISP) via SPI.
- Package: 44‑pin µQFP (MU) suitable for compact designs.
Note: Exact voltage/frequency specs depend on operating conditions.

Package

40-pin SOIC (Small Outline Integrated Circuit) package, typically the 0.300" wide SOIC-40.

Pinout

- Pin count: 44 pins (MU denotes the 44‑pin LQFP package)
- Function: ATmega644A-MU is an 8-bit AVR microcontroller with 64 KB flash, 4 KB SRAM, 2 KB EEPROM, multiple I/O ports, ADC, USART, SPI, I2C (TWI), timers/counters, PWM, and interrupt support for embedded control applications.

Manufacturer

Manufacturer: Microchip Technology Inc. (the ATmega644A-MU is part of the Atmel AVR line; Atmel was acquired by Microchip in 2016).
What kind of company: A multinational American semiconductor company that designs and manufactures microcontrollers, memory, and analog products; publicly traded on NASDAQ (ticker MCHP).

Application

ATmega644A-MU is used for mid-range embedded control tasks. Common application areas include:
- Home appliances, consumer electronics
- Industrial automation and data acquisition
- Robotics and motor/control applications (PWM, timers, I/O)
- Sensor interfacing and data logging
- Building automation and energy monitoring
- Automotive instrumentation and subsystems
- Educational/prototyping and hobbyist projects
These areas leverage its on‑chip peripherals (USART/SPI/I2C, multiple timers, ADC, EEPROM) and moderate memory for reliable, low‑power control.

Equivalent

Equivalent/close replacements in the AVR ATmega644 family (same core, memory, peripherals; different package or revision):
- ATmega644A-PU (40-pin DIP)
- ATmega644P-MU (MU/QFP variant)
- ATmega644PA-MU (enhanced revision in MU/QFP)
These are the typical cross-refs; choose by required package and footprint. Verify exact pinout and timing for your design.

Shipping

Shipping MethodsWe

offer global shipping services through DHL, FedEx, TNT, UPS, or any other forwarder of your choice.


Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

1. PayPal

2. Credit/ Debit Card

3. Wire Transfer

Similar