STMicroelectronics STM32L4 series, ARM® Cortex®-M4, 32-Bit Single-Core, 80 MHz, 256KB Flash, 64K x 8 RAM, 1.71V ~ 3.6V, -40°C ~ 85°C, 64-LQFP, Surface Mount.
| 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 | Tape & Reel (TR) Cut Tape (CT) |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART |
| Number of i (O) | 52 |
| Core processor | ARM® Cortex®-M4 |
| Case | 64-LQFP |
| Data converters | A/D 16x12b; D/A 2x12b |
| Program memory size | 256KB (256K x 8) |
The STM32L431RCT6TR: Fifty-two general-purpose I/O lines, plus CANbus, QSPI, SAI, and SWPMI on-chip.
The base product number STM32L431 covers a density family, so if a future revision needs more Flash or a different package, the migration path stays within the same peripheral set.
A functional peer within the STM32 portfolio is the STM32L151CBU6A (Cortex-M3, 32 MHz, 37 I/O, USB). The STM32L431RCT6TR runs at a higher clock speed (80 MHz vs 32 MHz), offers more I/O (52 vs 37), and adds QSPI and SAI connectivity. The two are not pin-compatible — the STM32L431RCT6TR uses a 64-LQFP package versus the STM32L151CBU6A's UFQFPN-48.