STMicroelectronics STM32L052K8U3, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, 27 I/O, 1.65 V to 3.6 V, -40°C to 125°C, 32-UFQFN Exposed Pad.
| 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, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART, USB |
| Number of i (O) | 27 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 32-UFQFN Exposed Pad |
| Data converters | A/D 10x12b; D/A 1x12b |
| Program memory size | 64KB (64K x 8) |
The base product number STM32L052 covers a density-and-package family, and the K8U3 variant (64 KB Flash, 32-pin UFQFPN) is a standard catalog item with consistent supply through ST's distribution network.
Within the STM32L0 series, the STM32L052K8T6 is the same base die and memory configuration in a 32-pin LQFP package, but the footprint differs — the K8U3 uses a 32-UFQFPN (5×5 mm) with exposed pad, while the K8T6 is a 32-LQFP (7×7 mm). They are not pin-compatible across package types. For a drop-in replacement, stay within the UFQFPN-32 footprint variants of the STM32L052 family; the Flash and SRAM sizes must match the application's memory map.