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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 16MHz
Connectivity I2C, SPI, UART/USART, USB
Peripherals Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number of I/O 26
Program Memory Size 16KB (8K x 16)
Program Memory Type FLASH
EEPROM Size 512 x 8
RAM Size 1.25K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 12x10b
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 ATMEGA16U4-MU is an 8-bit AVR microcontroller from Microchip, designed for applications requiring USB connectivity and flexible I/O. It operates at up to 16MHz with 16KB flash and 1.25KB RAM. The device includes a temperature sensor, PWM, and brown-out detection, all in a compact 44-VFQFN package. Its wide operating voltage range makes it compatible with both 3.3V and 5V systems.

  • Integrated USB: Simplifies design for USB-based devices without external controllers.
  • Wide voltage range: Supports 2.7V to 5.5V, easing integration with mixed-voltage systems.
  • On-chip temperature sensor: Enables thermal monitoring without additional components.
  • Compact QFN package: Saves board space while providing exposed pad for better thermal dissipation.

USB Peripherals

With native USB support and 16MHz processing, it is ideal for custom keyboards, game controllers, and USB-to-serial adapters.

Consumer Electronics

The wide voltage range (up to 5.5V) simplifies interfacing with legacy 5V sensors and displays in remote controls and toys.

Industrial Sensors

PWM outputs and a temperature sensor allow for direct motor speed control and thermal monitoring in factory equipment.

Battery Management

Low-power sleep modes and a watchdog timer make it suitable for monitoring battery state in portable devices.

Educational Kits

The AVR architecture is well-documented, making it a great choice for teaching embedded systems and robotics.

Lighting Control

Multiple PWM channels enable smooth dimming and color mixing in LED lighting systems.

Q: What is the maximum clock speed?
A: The ATMEGA16U4-MU runs at up to 16MHz.
Q: What is the supply voltage range?
A: It operates from 2.7V to 5.5V.
Q: How much flash memory is available?
A: It has 16KB of flash memory.
Q: Does it have a temperature sensor?
A: Yes, it includes an internal temperature sensor.
Q: What package is this device offered in?
A: It comes in a 44-VFQFN exposed pad package.
Base Product Number : ATMEGA16U4
16KB Flash 16MHz 44-VFQFN 8-bit MCU AVR Consumer Industrial PWM Temperature Sensor USB
Q: What is the maximum clock speed?
A: The ATMEGA16U4-MU runs at up to 16MHz.
Q: What is the supply voltage range?
A: It operates from 2.7V to 5.5V.
Q: How much flash memory is available?
A: It has 16KB of flash memory.
Q: Does it have a temperature sensor?
A: Yes, it includes an internal temperature sensor.
Q: What package is this device offered in?
A: It comes in a 44-VFQFN exposed pad package.