ATMEGA16U in ATmega Family
The ATMEGA16U sub-family from Microchip Technology consists of 8-bit AVR RISC-based microcontrollers specifically designed for low-to-mid complexity USB applications. Operating at 2.7V to 5.5V, these devices integrate a full-speed USB 2.0 controller with a hardware-based bootloader. They serve as a middle ground in the USB-enabled MegaAVR lineup, providing sufficient SRAM and EEPROM for protocol conversion and HID tasks while maintaining a compact footprint for space-constrained designs.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | RAM | Peripherals | Connectivity | I/O Pins | Package | Stock |
|---|---|---|---|---|---|---|
| ATMEGA16U2-MU (Microchip Technology) | 512 x 8 | Brown-out Detect/R.. | SPI, UART/USART, USB | 22 | VFQFN-32 | 16,439 |
| ATMEGA16U2-AU (Microchip Technology) | 512 x 8 | Brown-out Detect/R.. | SPI, UART/USART, USB | 22 | TQFP-32 | 25,258 |
| ATMEGA16U4-AU (Microchip Technology) | 1.25K | Brown-out Detect/R.. | I2C, SPI, UART/USA.. | 26 | TQFP-44 | 2,985 |
Variants within this sub-family are distinguished primarily by their package type and memory architecture. While the ATMEGA16U2 offers standard memory for USB-serial tasks, the ATMEGA16U4 provides additional SRAM and slightly different peripheral mapping to accommodate more complex firmware. Package options include TQFP for easier prototyping and QFN for high-density layouts, with temperature ratings covering standard industrial ranges for robust environmental performance.
