STMicroelectronics STM32L0 series, STM32L051C8T3, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 64 KB Flash, 8K x 8 RAM, 2K x 8 EEPROM, 37 I/O, 48-LQFP, -40 to 125°C, 1.65 V to 3.6 V supply.
| Parameter | Value |
|---|---|
| Series | STM32L0 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.65V ~ 3.6V |
| Operating temperature | -40°C ~ 125°C (TA) |
| Speed | 32MHz |
| Package | Tray |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 2K x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART |
| Number of i (O) | 37 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 48-LQFP |
| Data converters | A/D 10x12b |
| Program memory size | 64KB (64K x 8) |
The STM32L051C8T3: The 2 KB EEPROM is rated for 100k erase/write cycles and can store calibration constants, node IDs, or fault logs without an external serial EEPROM — one less part to qualify and one less I²C or SPI bus slot used. With 37 GPIOs in the 48-LQFP package, most designs will have headroom for local sensors, a small display, or an external memory interface.
The T3 variant is the extended-temperature version of the same base part, rated to 125°C versus the T6's 85°C. Electrically and functionally they are identical, so the T3 can replace a T6 in any design, but the reverse is only safe if the application never exceeds 85°C ambient.
The STM32L151CBU6A uses a Cortex-M3 core (same 32 MHz speed) and adds USB, DAC, and capacitive-sensing peripherals, but its temperature range stops at 85°C. The L051C8T3 is the better fit when the 125°C rating is required or when the lower-power Cortex-M0+ core is preferred for battery life.