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| PartNumber | STM32L100R8T6A | STM32L100R8T6 | STM32L100R8T6ATR |
| Description | ARM Microcontrollers - MCU Ultra-low-power 32-bit Value Line ARM Cortex-M3 MCU with 64 Kbytes Flash, 32 MHz CPU, LCD, USB | ARM Microcontrollers - MCU Value Line M3 ARM 32 Kbytes 32 MHz | ARM Microcontrollers - MCU Ultra-low-power 32-bit Value Line ARM Cortex-M3 MCU with 64 Kbytes Flash, 32 MHz CPU, LCD, USB |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | LQFP-64 | LQFP-64 | - |
| Series | STM32L100R8-A | STM32L100R8 | STM32L100R8-A |
| Core | ARM Cortex M3 | ARM Cortex M3 | - |
| Maximum Clock Frequency | 32 MHz | 32 MHz | - |
| Program Memory Size | 64 kB | 64 kB | - |
| Data RAM Size | 8 kB | 8 kB | - |
| ADC Resolution | 12 bit | 12 bit | - |
| Number of I/Os | 51 I/O | 51 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 | - |
| Product | MCU | MCU | - |
| Program Memory Type | Flash | Flash | - |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Data RAM Type | RAM | RAM | - |
| Data ROM Size | 2 kB | 2 kB | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | I2C, SPI, USART, USB | I2C, SPI, USART, USB | - |
| Analog Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | - |
| DAC Resolution | 12 bit | 12 bit | - |
| I/O Voltage | 5.5 V | 5.5 V | - |
| Number of ADC Channels | 20 Channel | 20 Channel | - |
| Number of Timers/Counters | 8 x 16 bit | 8 x 16 bit | - |
| Processor Series | STM32L100 | STM32L100 | - |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 960 | 960 | 1000 |
| 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 | - |
| Watchdog Timers | Watchdog Timer | Watchdog Timer | - |
| Unit Weight | 0.012088 oz | 0.012088 oz | - |
| Packaging | - | Tray | - |
| Moisture Sensitive | - | Yes | - |
| Tradename | - | STM32 | - |