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| PartNumber | ATXMEGA128B3-MCU | ATXMEGA128B3-MCUR | ATXMEGA128B3-MH |
| Description | 8-bit Microcontrollers - MCU AVR XMEGA 128KB FLASH 2KB EE 8K | 8-bit Microcontrollers - MCU AVR XMEGA 128KB FLASH 2KB EE 8K | Microcontrollers - MCU 8-bit Microcontrollers - MCU 8/16-bit AVR MCU |
| Manufacturer | Microchip | Microchip | Atmel |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | Embedded - Microcontrollers |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | VQFN-64 | VQFN-64 | - |
| Series | XMEGA B3 | XMEGA B3 | AVRR XMEGAR B3 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz |
| Program Memory Size | 128 kB | 128 kB | 128KB (128K x 8) |
| Data RAM Size | 8 kB | 8 kB | 8 kB |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Number of I/Os | 36 I/O | 36 I/O | - |
| Operating Supply Voltage | 3.6 V | 3.6 V | 1.6 V to 3.6 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Reel | Tray Alternate Packaging |
| Program Memory Type | Flash | Flash | FLASH |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 2 kB | 2 kB | 2 kB |
| Data ROM Type | EEPROM | EEPROM | EEPROM |
| Interface Type | I2C, SPI, UART, USB | I2C, SPI, UART, USB | I2C SPI USART USB |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 8 | 8 | 8 Channel |
| Number of Timers/Counters | 2 Timer | 2 Timer | - |
| Processor Series | xmega128B3 | xmega128B3 | AVR XMEGA |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 360 | 4000 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 3.6 V | 3.6 V | - |
| Supply Voltage Min | 1.6 V | 1.6 V | - |
| Tradename | XMEGA | XMEGA | XMEGA |
| Unit Weight | 0.008021 oz | 0.008021 oz | 0.007277 oz |
| Product | - | - | MCU |
| Package Case | - | - | QFN-64 |
| Operating Temperature | - | - | -40°C ~ 85°C (TA) |
| Supplier Device Package | - | - | 64-QFN (9x9) |
| Number of I O | - | - | 36 |
| Speed | - | - | 32MHz |
| EEPROM Size | - | - | 2K x 8 |
| Core Processor | - | - | AVR |
| RAM Size | - | - | 8K x 8 |
| Peripherals | - | - | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Connectivity | - | - | I2C, IrDA, SPI, UART/USART, USB |
| Voltage Supply Vcc Vdd | - | - | 1.6 V ~ 3.6 V |
| Core Size | - | - | 8/16-Bit |
| Data Converters | - | - | A/D 8x12b |
| Oscillator Type | - | - | Internal |
| Supply Voltage Max | - | - | 3.6 V |
| Supply Voltage Min | - | - | 1.6 V |
| Analog Supply Voltage | - | - | 1.6 V to 3.6 V |
| Number of I Os | - | - | 36 I/O |
| I O Voltage | - | - | 1.6 V to 3.6 V |
| Number of Timers Counters | - | - | 2 Timer |
| Watchdog Timers | - | - | Watchdog Timer |
| DAC Resolution | - | - | - |