| Part Number | ATUC128L3U-AUT | ATUC128L4U-AUT |
|---|---|---|
| Manufacturer | Microchip Technology | Atmel |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Active | Active |
| Core Processor | AVR | AVR |
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core |
| Speed | 50MHz | 50MHz |
| Connectivity | I²C, SPI, UART/USART, USB | I²C, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Number of I/O | 51 | 36 |
| Program Memory Size | 128KB (128K x 8) | 128KB (128K x 8) |
| Program Memory Type | Flash | Flash |
| EEPROM Size | - | - |
| RAM Size | 32K x 8 | 32K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.62V ~ 3.6V | 1.62V ~ 3.6V |
| Data Converters | A/D 8x12b | A/D 8x12b |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 64-TQFP | 48-TQFP |
| Supplier Device Package | 64-TQFP (10x10) | 48-TQFP (7x7) |