| PartNumber | STM32L021D4P7 | STM32L021D4P7TR | STM32L021D4P6 |
| Description | ARM Microcontrollers - MCU Ultra-low-power ARM Cortex-M0+ MCU with 16-Kbytes Flash, 32 MHz CPU, AES | ARM Microcontrollers - MCU Ultra-low-power ARM Cortex-M0+ MCU with 16-Kbytes Flash, 32 MHz CPU, AES | ARM Microcontrollers - MCU 16/32-BITS MICROS |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | - | Y |
| Package / Case | TSSOP-14 | TSSOP-14 | - |
| Series | STM32L021D4 | STM32L021D4 | STM32L021D4 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 960 | 2500 | 960 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Unit Weight | - | - | 0.006102 oz |