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| Part Number | ATMEGA1281-16MU | ATMEGA1281-16MUR | ATMEGA128-16MU | ATMEGA1281-16AU |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active |
| Core Processor | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 16MHz | 16MHz | 16MHz | 16MHz |
| Connectivity | EBI/EMI, I²C, SPI, UART/USART | EBI/EMI, I²C, SPI, UART/USART | EBI/EMI, I²C, SPI, UART/USART | EBI/EMI, I²C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 54 | 54 | 53 | 54 |
| Program Memory Size | 128KB (64K x 16) | 128KB (64K x 16) | 128KB (64K x 16) | 128KB (64K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash |
| EEPROM Size | 4K x 8 | 4K x 8 | 4K x 8 | 4K x 8 |
| RAM Size | 8K x 8 | 8K x 8 | 4K x 8 | 8K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 4.5V ~ 5.5V | 2.7V ~ 5.5V |
| Data Converters | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b |
| Oscillator Type | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad | 64-TQFP |
| Supplier Device Package | 64-QFN (9x9) | 64-QFN (9x9) | 64-QFN (9x9) | 64-TQFP (14x14) |
