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ATMEGA644A-MU

Name: ATMEGA644A-MU
Rating: 4.7 (12 reviews)

IC MCU 8BIT 64KB FLASH 44VQFN

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Mfr。パート #ATMEGA644A-MU
パッケージ 44-VFQFN Exposed Pad
データシート ATMEGA644A-MU DataSheet
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仕様

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

概要

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.