Microchip Technology ATMEGA32U4-AU Microcontrollers
IC MCU 8BIT 32KB FLASH 44TQFP
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
ATMEGA32U4-AU
Base Model
Detailed Description
IC MCU 8BIT 32KB FLASH 44TQFP
Package
44-TQFP
Lifecycle Status
Active
Datasheet
ATMEGA32U4-AU Datasheet
Quick Jump:
Technical Specifications
Microchip Technology ATMEGA32U4-AU Microcontrollers technical specifications.
General
Series
ATmega32U4
RAM Size
2.5K x 8
Data Bus Width
8 bit
Maximum Clock Frequency
16 MHz
RoHS
Yes
Package / Case
44-TQFP
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 85°C (TA)
Supply Voltage
2.7V ~ 5.5V
Lifecycle Status
Active
Alternate Parts Comparison (ATMEGA32U4-AU vs ATMEGA32U2-MU vs ATMEGA32U2-MUR vs ATMEGA32U2-AUR)
Side-by-side technical parameter comparison of related primary models in this product family.
| This Part | Alternate Parts | Alternate Parts | Alternate Parts | |
|---|---|---|---|---|
| Package / Case | 44-TQFP | 32-VFQFN Exposed Pad | 32-VFQFN Exposed Pad | 32-TQFP |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supply Voltage | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Core Processor | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| RAM Size | 2.5K x 8 | 1K x 8 | 1K x 8 | 1K x 8 |
| RoHS | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Active | Active |
| Connectivity | I²C, SPI, UART/USART, USB | SPI, UART/USART, USB | SPI, UART/USART, USB | SPI, UART/USART, USB |
| EEPROM Size | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 |
| Number of I/O | 26 | 22 | 22 | 22 |
| Action |
Cross Reference
Manufacturer-stated alternates from official cross-reference tools. These are not a guaranteed pin-compatible drop-in. Qualify package, pinout, and electrical limits against the datasheet before a board change. See cross-reference vs drop-in compatible .
Suggested replacements
MC9S08PT32VLDNXP SemiconductorsNXP
IC MCU 8BIT 32KB FLASH 44LQFP
MC9S08PA32VLDNXP SemiconductorsNXP
IC MCU 8BIT 32KB FLASH 44LQFP
More Parts in Microcontrollers
Browse additional parts from the same category, grouped by series, package type, and manufacturer. These are catalog suggestions — not verified pin-compatible alternates.
ATMEGA32U4-MUMicrochip Technology8-bit AVR MCU, 32 KB, 2560 Bytes, 16 MHz, 2.7 to 5.5V, VQFN-44, RoHS
