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| PartNumber | AT32UC3A3256S-CTUT | AT32UC3A3256S-CTUR | AT32UC3A3256S-CTUT,SL940 |
| Description | 32-bit Microcontrollers - MCU 256KB, 144FFBGA w/ AES Mod. | 32-bit Microcontrollers - MCU 256KB, 144FFBGA w/ AES Mod. | |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | FFBGA-144 | TBGA-144 | - |
| Series | AT32UC3A3 | AT32UC3A3 | - |
| Core | AVR | AVR | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Maximum Clock Frequency | 66 MHz | 66 MHz | - |
| Program Memory Size | 256 kB | 256 kB | - |
| Data RAM Size | 64 kB | 64 kB | - |
| ADC Resolution | 10 bit | No ADC | - |
| Operating Supply Voltage | 1.8 V, 3.3 V | 1.8 V, 3.3 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Reel | - |
| Height | 1.2 mm | 1.2 mm | - |
| Length | 11 mm | 11 mm | - |
| Program Memory Type | Flash | Flash, SRAM | - |
| Width | 11 mm | 11 mm | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Data RAM Type | SRAM | SRAM | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | 2-Wire, I2S, JTAG, SPI, USART | 2-Wire, I2S, JTAG, SPI, USART | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 8 | - | - |
| Number of Timers/Counters | 4 Timer | 4 Timer | - |
| Processor Series | AT32UC3A3 | AT32UC3A3 | - |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 168 | 2000 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 1.89 V, 3.6 V | 1.89 V, 3.6 V | - |
| Supply Voltage Min | 1.81 V, 2.7 V, 3 V | 1.81 V, 2.7 V, 3 V | - |
| Tradename | AVR | AVR | - |
| Unit Weight | 0.007323 oz | - | - |
| Number of I/Os | - | 23 I/O | - |