STMicroelectronics STM32L4 series, ARM Cortex-M4 32-bit MCU, 80 MHz, 128 KB Flash, 40K x 8 RAM, 38 I/O, 48-LQFP, -40 to 85 °C.
| Parameter | Value |
|---|---|
| Series | STM32L4 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.71V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 80MHz |
| Package | Tray |
| RAM size | 40K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, PWM, WDT |
| Connectivity | I²C, Infrared, IrDA, LINbus, Quad SPI, SPI, UART/USART, USB |
| Number of i (O) | 38 |
| Core processor | ARM® Cortex®-M4 |
| Case | 48-LQFP |
| Data converters | A/D 10x12b |
| Program memory size | 128KB (128K x 8) |
The STM32L412CBT6P: 128 KB Flash and 40 KB SRAM.
Product status is Active, ROHS3 Compliant.
38 I/O lines in a 48-LQFP package (7x7 mm body).
The 48-LQFP package is a standard JEDEC footprint — no BGA reflow complexity, and hand-solderable for prototypes.
The STM32L412CBT6P runs an ARM Cortex-M4 at 80 MHz with a hardware FPU, while the STM32L151CBU6A uses a Cortex-M3 at 32 MHz without FPU. Both have similar Flash and SRAM densities and share a 48-pin package footprint, but the L4 is the higher-performance, lower-voltage choice for new designs.