ATMEGA32U in ATmega Family
The ATMEGA32U family, manufactured by Microchip Technology, is a specialized line of 8-bit AVR microcontrollers distinguished by integrated Full-Speed USB 2.0 connectivity. Based on the RISC architecture, these MCUs eliminate the need for external USB-to-serial bridge chips, making them a standard choice for compact peripherals. They operate at 16 MHz and provide 32KB of ISP flash, catering to developers who require direct USB HID, CDC, or MIDI communication within a single-chip solution.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Package | Stock |
|---|---|---|
| ATmega32U4 (Microchip Technology) | VFQFN-44 | 4,252 |
| ATMEGA32U4-AU (Microchip Technology) | TQFP-44 | 5,595 |
| ATMEGA32U4-AUR (Microchip Technology) | TQFP-44 | 223 |
Variants within the ATMEGA32U family are primarily differentiated by package type and I/O count. The ATMEGA32U4 provides 12 channels of 10-bit ADC, whereas the ATMEGA32U2 offers a reduced feature set and smaller pin count for simpler USB-to-serial tasks. Packaging options range from 44-pin TQFP (AU) for easy prototyping to 44-pad QFN (MU) for space-constrained PCB designs. Tape and reel (R) options are available for high-volume automated assembly.
