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| PartNumber | ATSAM3U1EA-AU | ATSAM3U1EA-CU | ATSAM3U1E-CU |
| Description | ARM Microcontrollers - MCU 64K Flash, 20K SRAM 32-bit ARM Cortex M3 | ARM Microcontrollers - MCU 64K Flash, 20K SRAM 32-bit ARM Cortex M3 | |
| Manufacturer | Microchip | Microchip | - |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | LQFP-144 | LFBGA-144 | - |
| Series | SAM3U | SAM3U | - |
| Core | ARM Cortex M3 | ARM Cortex M3 | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Maximum Clock Frequency | 96 MHz | 96 MHz | - |
| Program Memory Size | 64 kB | 64 kB | - |
| Data RAM Size | 20 kB | 20 kB | - |
| Number of I/Os | 96 I/O | 96 I/O | - |
| Operating Supply Voltage | 1.8 V | 1.8 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Height | 1.4 mm | 0.91 mm | - |
| Length | 20 mm | 10 mm | - |
| Product | MCU | MCU | - |
| Program Memory Type | Flash | Flash | - |
| Width | 20 mm | 10 mm | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Interface Type | 2xTWI, 4xUSART, 5xSPI, Bus | 2xTWI, 4xUSART, 5xSPI, Bus | - |
| I/O Voltage | 3.3 V | 3.3 V | - |
| Number of Timers/Counters | 8 Timer | 8 Timer | - |
| Processor Series | ATSAM3x | ATSAM3x | - |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | - |
| Factory Pack Quantity | 180 | 184 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 1.95 V | 1.95 V | - |
| Supply Voltage Min | 1.62 V | 1.62 V | - |
| Tradename | Cortex-M3, Cortex | Cortex-M3, Cortex | - |
| Unit Weight | 0.045518 oz | - | - |