Microchip Technology ATMEGA324P-20MU

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
Packaging Tray | NULL
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 32
Program Memory Size 32KB (16K x 16)
Program Memory Type FLASH
EEPROM Size 1K x 8
RAM Size 2K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 44-VQFN (7x7)
Package / Case 44-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATMEGA324P-20MU is a high-performance 8-bit AVR microcontroller with 32KB flash memory and 2KB SRAM. Operating at up to 20MHz with a 2.7V-5.5V supply, it integrates PWM, WDT, and brown-out detection for robust embedded control in industrial and consumer applications.

  • High Integration: Includes PWM, WDT, and brown-out detection, reducing external component count and BOM cost.
  • Wide Voltage Range: 2.7V-5.5V operation allows flexible power supply design, from 3.3V to 5V systems.
  • Proven AVR Core: 20MHz throughput with single-cycle instructions ensures efficient code execution for time-critical tasks.
  • Extended Temperature: -40°C to 85°C rating supports harsh industrial environments.

Industrial Control Systems

The 20MHz AVR core with 32KB flash and 2KB SRAM is ideal for real-time control loops in PLCs and motor controllers, leveraging PWM and WDT for reliable operation.

Sensor Fusion Nodes

With multiple I/O pins and analog comparators, this MCU can aggregate data from temperature, pressure, and humidity sensors, processing signals locally before transmission.

Battery-Powered Devices

Operating from 2.7V to 5.5V, it supports direct battery connection and features power-saving sleep modes, extending battery life in portable instruments.

Automotive Aftermarket

The -40°C to 85°C temperature range and robust brown-out detection make it suitable for non-critical automotive modules like window lift controllers or mirror adjusters.

Smart Home Gateways

Its 32KB program memory can handle protocol stacks for Zigbee or Z-Wave bridging, while the WDT ensures system recovery in unattended environments.

Medical Monitoring Devices

The low-power AVR core and POR (Power-on Reset) ensure safe startup and stable operation for portable patient monitors, meeting basic medical device reliability expectations.

Q: What is the maximum operating frequency of the ATMEGA324P-20MU?
A: The ATMEGA324P-20MU operates at a maximum speed of 20MHz.
Q: What is the program memory size?
A: It features 32KB of in-system programmable flash memory.
Q: What is the supply voltage range?
A: The supply voltage range is 2.7V to 5.5V.
Q: What package is this MCU available in?
A: It comes in a 44-VFQFN exposed pad package.
Base Product Number : ATMEGA324P
20MHz 2KB SRAM 32KB Flash 44-VFQFN 8-bit MCU AVR Battery-Powered Industrial PWM Sensor WDT
Q: What is the maximum operating frequency of the ATMEGA324P-20MU?
A: The ATMEGA324P-20MU operates at a maximum speed of 20MHz.
Q: What is the program memory size?
A: It features 32KB of in-system programmable flash memory.
Q: What is the supply voltage range?
A: The supply voltage range is 2.7V to 5.5V.
Q: What package is this MCU available in?
A: It comes in a 44-VFQFN exposed pad package.