| PartNumber | ATSAM3S4BA-AU | ATSAM3S4BA-AUR | ATSAM3S4BA-MU |
| Description | ARM Microcontrollers - MCU MRL A 256K Flash 48K SRAM Ind Temp | ARM Microcontrollers - MCU LQFPGREENIND TEMPMRL A | ARM Microcontrollers - MCU MRL A 256K Flash 48K SRAM Ind Temp |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | QFP-64 | LQFP-64 | QFN-64 |
| Series | SAM3S | SAM3S | SAM3S |
| Core | ARM Cortex M3 | ARM Cortex M3 | ARM Cortex M3 |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 64 MHz | 64 MHz | 64 MHz |
| Program Memory Size | 256 kB | 256 kB | 256 kB |
| Data RAM Size | 48 kB | 48 kB | 48 kB |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Number of I/Os | 47 I/O | - | 47 I/O |
| Operating Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| Minimum Operating Temperature | - 40 C | - | - 40 C |
| Maximum Operating Temperature | + 85 C | - | + 85 C |
| Packaging | Tray | Reel | Tray |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data ROM Size | 16 kB | - | 16 kB |
| Interface Type | 2-Wire, RS-485, SPI, UART | I2C, SPI, UART | 2-Wire, RS-485, SPI, UART |
| Analog Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| I/O Voltage | 3.3 V | 3.3 V | 3.3 V |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 10 | 10 | 10 |
| Number of Timers/Counters | 6 Timer | 3 Timer | 6 Timer |
| Processor Series | AT91SAM3S | ATSAM3x | AT91SAM3S |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 1500 | 260 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 1.9 V | 1.9 V | 1.9 V |
| Supply Voltage Min | 1.62 V | 1.62 V | 1.62 V |
| Unit Weight | 0.062237 oz | 0.012088 oz | 0.007277 oz |
| Data RAM Type | - | SRAM | - |