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Microchip ATMEGA644P-20MU 8-bit AVR Microcontroller, 20 MHz, 64kB Flash, 44-Pin VQFN
Specifications
| Country of Origin | India |
|---|---|
| Brand | Microchip |
| Height | 0.95mm |
| Length | 7.1mm |
| Model | ATMEGA644P-20MU |
| Width | 7.1mm |
| Mount Type | Surface |
| Series | ATMEGA644P |
| Maximum Operating Temperature | 85°C |
| Package Type | VQFN |
| Minimum Operating Temperature | -40°C |
| Ram size | 4kB |
| Pin Count | 44 |
| Maximum Supply Voltage | 5.5V |
| Minimum Supply Voltage | 2.7V |
| Device Core | AVR |
| Program Memory Size | 64kB |
| Maximum Clock Frequency | 20MHz |
| Number of Programmable I/Os | 32 |
| Analogue Comparators | 1 |
| Number of Timers | 2 |
| Instruction Set Architecture | RISC |
| ADCs | 8 x 10 Bit |
| Program Memory Type | FLASH |
Key Features
- AVR architecture 8-bit microcontroller for industrial and embedded applications.
- 64kB of on-chip flash program memory, ideal for complex code storage.
- Operates at up to 20 MHz maximum clock frequency for high performance.
- Surface mount VQFN package with 44 pins for compact PCB integration.
- Supports 32 programmable I/O lines and multiple ADC channels.
- Wide operating voltage range from 2.7V to 5.5V for versatile power options.
- PicoPower features enable energy-efficient operation suitable for battery-powered systems.
- On-chip SRAM and internal EEPROM for fast memory access and non-volatile data storage.
Product Description
Microchip's ATMEGA644P-20MU is a high-performance 8-bit AVR microcontroller designed for demanding embedded and industrial control applications. With its advanced picoPower technology, this device offers outstanding energy efficiency without compromising on processing speed or capability. The ATMEGA644P-20MU comes in a compact 44-pin VQFN surface-mount package, ideal for dense PCB layouts.
This microcontroller features a generous 64kB of on-chip flash program memory, enabling developers to store complex programs and algorithms directly on the device. For volatile and non-volatile fast-access storage, the ATMEGA644P-20MU includes 4kB of SRAM and internal EEPROM. Operating at up to 20 MHz clock frequency ensures responsive and reliable performance, suitable for a broad range of industrial controls, automation, instrumentation, and consumer electronics applications.
Supporting up to 32 programmable I/O pins, this controller delivers extensive connectivity, making it easy to interface with sensors, actuators, and other peripherals. Eight 10-bit ADC channels cater to precision analog input requirements, while additional features such as analogue comparator, two programmable timers, watchdog timer, DAC, built-in temperature sensor, internal voltage reference, and brown-out detector boost reliability and versatility.
The ATMEGA644P-20MU implements the RISC instruction set architecture, unlocking efficient code execution and minimizing power consumption. Standard communication interfaces include SPI, TWI (I2C), USART, USB, CAN, and LIN, allowing robust integration into modern industrial systems and IoT devices.
With an operating voltage range from 2.7V to 5.5V and temperature tolerance from -40°C to +85°C, the device is purpose-built for tough environments. The minimal height and 7.1mm square footprint maximize board space flexibility.
Applications of the ATMEGA644P-20MU span industrial automation, process control, laboratory instrumentation, HVAC systems, automotive controls (non-automotive-standard), energy management, and advanced consumer appliances. Its reliable flash memory, fast clock rate, and low-power operation are especially useful for battery-powered devices, portable measurement tools, and systems requiring frequent reprogramming.
Discover more Microchip AVR microcontrollers and explore related industrial embedded control solutions in the EnvMart Microcontroller category.
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Frequently Asked Questions
The maximum clock frequency of this microcontroller is 20 MHz.
It features 64kB of on-chip flash program memory, suitable for storing complex programs.
This microcontroller supports up to 32 programmable I/O lines for extensive connectivity.
It comes in a compact 44-pin VQFN surface-mount package, ideal for dense PCB layouts.
The ATMEGA644P-20MU can operate in temperatures ranging from -40°C to 85°C.
This model includes 4kB of SRAM for fast memory access.
Yes, it features eight 10-bit ADC channels for precision analog input requirements.
The height is 0.95mm, and the footprint is 7.1mm x 7.1mm, maximizing board space flexibility.
It supports standard communication interfaces including SPI, TWI (I2C), USART, USB, CAN, and LIN.
The microcontroller implements a RISC instruction set architecture, optimizing code execution and power consumption.
It is suitable for industrial automation, process control, laboratory instrumentation, HVAC systems, and more.
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