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| Part Number | STM32L021G4U6 |
| Datasheet | STM32L021G4U6 datasheet |
| Description | IC MCU 32BIT 16KB FLASH 28UFQFPN |
| Manufacturer | STMicroelectronics |
| Series | STM32L0 |
| Part Status | Active |
| Core Processor | ARM® Cortex®-M0+ |
| Core Size | 32-Bit |
| Speed | 32MHz |
| Connectivity | I²C, IrDA, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Number of I/O | 24 |
| Program Memory Size | 16KB (16K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | 512 x 8 |
| RAM Size | 2K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.65V ~ 3.6V |
| Data Converters | A/D 10x12b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | Surface Mount |
| Supplier Device Package | 28-UFQFN |
| Base Part Number | 28-UFQFPN (4x4) |