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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 I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 23
Program Memory Size 4KB (2K x 16)
Program Memory Type FLASH
EEPROM Size 256 x 8
RAM Size 512 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 28-VQFN (4x4)
Package / Case 28-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATMEGA48A-MMH is an 8-bit AVR microcontroller from Microchip Technology. It operates at up to 20 MHz with a supply voltage range of 1.8V to 5.5V. This device includes 4KB of flash memory and 512 bytes of RAM. Housed in a 28-VFQFN package, it offers a balance of performance and low power for a wide range of embedded applications.

  • High-speed 20MHz AVR core: Provides fast execution for time-critical tasks.
  • Wide voltage range (1.8V-5.5V): Flexible for both battery and regulated supply designs.
  • Compact 28-VFQFN package: Ideal for space-limited PCB layouts.
  • Rich peripheral set: Includes PWM, brown-out reset, and watchdog timer for robust designs.

Arduino-Compatible Prototypes

Its AVR core and 20MHz speed make it a drop-in for many hobbyist and educational projects.

Automotive Body Electronics

With 1.8V-5.5V range and -40°C to 85°C, it suits window lift and mirror control modules.

Industrial Automation Sensors

PWM and brown-out detection enable precise control in proximity sensors and encoders.

Consumer Appliances

Its 4KB flash handles firmware for coffee makers and air purifiers with multiple modes.

Smart Home Devices

Low power modes and WDT support reliable operation in smart plugs and thermostats.

Battery-Powered Tools

The 1.8V minimum supply allows operation from two AA batteries until near depletion.

Q: What is the maximum operating speed?
A: The ATMEGA48A-MMH runs at up to 20 MHz.
Q: What is the supply voltage range?
A: It operates from 1.8V to 5.5V.
Q: How much flash memory is available?
A: It has 4KB of flash (2K x 16 bits).
Q: What package is this offered in?
A: It comes in a 28-VFQFN exposed pad package.
Base Product Number : ATMEGA48A
20MHz 28-VFQFN 4KB flash 8-bit MCU Arduino automotive AVR industrial
Q: What is the maximum operating speed?
A: The ATMEGA48A-MMH runs at up to 20 MHz.
Q: What is the supply voltage range?
A: It operates from 1.8V to 5.5V.
Q: How much flash memory is available?
A: It has 4KB of flash (2K x 16 bits).
Q: What package is this offered in?
A: It comes in a 28-VFQFN exposed pad package.