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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
Packaging Tray |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity SPI, UART/USART, USI
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 54
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) 1.8V ~ 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 64-QFN (9x9)
Package / Case 64-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATMEGA325A-MU is an 8-bit AVR microcontroller in a 64-VFQFN package. It operates at up to 20MHz with 32KB of flash memory and 2K of SRAM. With a supply voltage range of 1.8V to 5.5V and integrated features like brown-out detection, PWM, and WDT, it is a reliable choice for cost-sensitive embedded applications.

  • Wide Voltage Range: 1.8V to 5.5V supports both low-power and legacy 5V systems.
  • Proven AVR Core: Simple architecture with high code efficiency and extensive tool support.
  • Integrated Safety: Brown-out reset and WDT enhance system reliability.
  • Compact Package: 64-VFQFN saves board space for space-constrained designs.

Consumer Electronics

Use the low-voltage operation (1.8V) for battery-powered remote controls and small appliances.

Industrial Sensors

Deploy the 20MHz AVR core for simple sensor readout and signal conditioning in factory automation.

Automotive Aftermarket

Implement window lift or mirror control modules with the wide voltage range and robust I/O.

Smart Home Devices

Control lighting and small motors with the PWM module and low-power sleep modes.

Educational Kits

Use the easy-to-program AVR architecture for microcontroller training and prototyping.

Portable Instruments

Combine low power and 5.5V operation for handheld multimeters and data loggers.

Q: What is the core architecture of the ATMEGA325A-MU?
A: It uses the 8-bit AVR core running at up to 20MHz.
Q: What is the program memory size?
A: It has 32KB of flash memory (16K x 16 bits).
Q: What is the supply voltage range?
A: The device operates from 1.8V to 5.5V.
Q: What package is it available in?
A: It comes in a 64-VFQFN exposed pad package.
Q: Does it have brown-out detection?
A: Yes, it includes Brown-out Detect/Reset, POR, PWM, and WDT.
Base Product Number : ATMEGA325A
20MHz 32KB Flash 64-VFQFN 8-bit ATMEGA AVR Low Power Microchip PWM WDT
Q: What is the core architecture of the ATMEGA325A-MU?
A: It uses the 8-bit AVR core running at up to 20MHz.
Q: What is the program memory size?
A: It has 32KB of flash memory (16K x 16 bits).
Q: What is the supply voltage range?
A: The device operates from 1.8V to 5.5V.
Q: What package is it available in?
A: It comes in a 64-VFQFN exposed pad package.
Q: Does it have brown-out detection?
A: Yes, it includes Brown-out Detect/Reset, POR, PWM, and WDT.