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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
Packaging Cut Tape (CT) | 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 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 32-VQFN (5x5)
Package / Case 32-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATMEGA48A-MUR is an 8-bit AVR microcontroller that balances performance and power efficiency. It operates from 1.8V to 5.5V at speeds up to 20MHz, with 4KB of flash and 512 bytes of SRAM. The 32-VFQFN package includes an exposed pad for thermal management, and integrated features like brown-out detection, PWM, and watchdog timer ensure reliable operation in consumer and industrial applications.

  • 1.8V minimum supply voltage enables direct battery operation, reducing power conversion losses.
  • 20MHz performance provides ample headroom for complex algorithms, ensuring smooth real-time responses.
  • 4KB flash is sufficient for mid-size applications, offering a cost-effective solution without over-provisioning.
  • 32-VFQFN package with exposed pad improves heat dissipation, enhancing long-term reliability.

Consumer Electronics Remote Controls

The 1.8V operation allows direct CR2032 battery use, while 4KB flash stores IR code tables for universal remotes.

Home Automation Sensors

With low-voltage operation and WDT, it can monitor door/window sensors and report status over Zigbee or similar protocols.

Battery Management Systems

The 20MHz speed and 512B SRAM enable real-time cell voltage monitoring in small Li-ion battery packs.

LED Display Controllers

PWM outputs drive RGB LED matrices in signage, with the 32-pin package allowing multiple I/O connections.

Portable Instrumentation

Its 1.8-5.5V range supports various sensor supplies, and the small footprint fits handheld multimeters.

Smart Toys

The low cost and 4KB flash make it ideal for interactive toys with sound and motion effects, powered by 2xAA batteries.

Q: What is the operating voltage range?
A: It operates from 1.8V to 5.5V, offering flexibility for low-power and standard logic designs.
Q: What is the maximum speed?
A: The CPU can run at 20MHz, enabling fast data processing.
Q: How much flash memory is included?
A: It has 4KB of flash memory (2K x 16 bits) for program storage.
Q: What is the package type?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact PCBs.
Q: Does it support PWM?
A: Yes, it includes PWM channels for motor and lighting control.
Base Product Number : ATMEGA48A
20MHz 32-VFQFN 4KB flash 8-bit MCU AVR battery consumer low power PWM WDT
Q: What is the operating voltage range?
A: It operates from 1.8V to 5.5V, offering flexibility for low-power and standard logic designs.
Q: What is the maximum speed?
A: The CPU can run at 20MHz, enabling fast data processing.
Q: How much flash memory is included?
A: It has 4KB of flash memory (2K x 16 bits) for program storage.
Q: What is the package type?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact PCBs.
Q: Does it support PWM?
A: Yes, it includes PWM channels for motor and lighting control.