STMicroelectronics STM32L4 series, ARM Cortex-M4 32-bit MCU, 120 MHz, 512 KB Flash, 320 KB SRAM, 1.71 V to 3.6 V, 38 I/O, 48-UFQFN exposed pad, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | STM32L4 |
| Mounting type | 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 | 120MHz |
| Package | Tray |
| RAM size | 320K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG |
| Number of i (O) | 38 |
| Core processor | ARM® Cortex®-M4 |
| Case | 48-UFQFN Exposed Pad |
| Data converters | A/D 10x12b; D/A 2x12b |
| Program memory size | 512KB (512K x 8) |
The STM32L4P5CEU6: The MCU integrates a full set of peripherals: brown-out detect, DMA, LCD driver, POR, PWM, and watchdog. Connectivity includes CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, and USB OTG — enough to serve as the central controller in an IoT gateway, a motor-drive interface board, or a portable medical monitor. The 38 I/O lines in the 48-UFQFN package give reasonable breakout for mixed-signal designs.
Within the STM32L4 series, pin-compatible density variants exist (e.g., STM32L4P5xx with different Flash/SRAM sizes). The base product number STM32L4P5 shares the same footprint, so a swap requires checking the memory map and peripheral set, not the board layout.
The core runs at 120 MHz, which is the maximum clock for this Cortex-M4 device. At that speed, the Flash needs at least one wait state inserted; the STM32L4's prefetch buffer helps maintain single-cycle execution for sequential code.