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| PartNumber | SIM3C164-B-GM | SIM3C166-B-GM | SIM3C164-B-GMR |
| Description | ARM Microcontrollers - MCU ARM Cortex-32-bit 80 MHz 256 kB USB MCU | ARM Microcontrollers - MCU ARM Cortex-32-bit 80 MHz 256 kB EMIF MCU | ARM Microcontrollers - MCU 256KB, QFN40 |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | QFN-40 | QFN-64 | - |
| Series | SIM3C164 | SIM3C166 | SIM3C164 |
| Core | ARM Cortex M3 | ARM Cortex M3 | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Maximum Clock Frequency | 80 MHz | 80 MHz | - |
| Program Memory Size | 256 kB | 256 kB | 256 kB |
| Data RAM Size | 32 kB | 32 kB | 32 kB |
| Number of I/Os | 77 I/O | 78 I/O | - |
| Operating Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Tray | Reel |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Interface Type | 2 x I2C, I2S, 3 x SPI, 2 x USART, 2 x UART | 2 x I2C, I2S, 3 x SPI, 2 x USART, 2 x UART | - |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of Timers/Counters | 14 Timer | 15 Timer | - |
| Processor Series | SIM3C1xx | SIM3C1xx | - |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 490 | 260 | 2500 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.6 V | 3.6 V | - |
| Supply Voltage Min | 1.8 V | 1.8 V | - |
| Tradename | Precision32 | Precision32 | Precision32 |
| Unit Weight | 0.004138 oz | 0.007277 oz | - |