It carries 4 KB of Flash program memory, 1 KB of RAM, and 256 bytes of EEPROM — a tight memory map sized for single-function control tasks like sensor readout, IR remote decoding, or simple PWM motor control. The 30 I/O lines in the 32-UFQFPN package give decent pinout flexibility for its footprint — you get a 12-bit ADC with 23 multiplexed channels, plus I2C, SPI, and UART connectivity. Brown-out detect, DMA, and a watchdog timer are integrated, so external supervisor ICs are optional in most designs.
ST STM8L151K2U6 8-bit MCU, 16 MHz, 4KB Flash, 32-UFQFPN
MPNSTM8L151K2U6
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STMicroelectronics STM8L EnergyLite series, STM8L151K2U6, 8-bit MCU, STM8 core, 16MHz, 4KB FLASH, 1K x 8 RAM, 256 x 8 EEPROM, 30 I/O, 1.8V-3.6V, -40°C to 85°C, 32-UFQFPN (5x5 mm).
$1.0648Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | STM8L EnergyLite |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 16MHz |
| Package | Tray |
| RAM size | 1K x 8 |
| Core size | 8-Bit |
| EEPROM size | 256 x 8 |
| Peripherals | Brown-out Detect/Reset, DMA, IR, POR, PWM, WDT |
| Connectivity | I2C, IrDA, SPI, UART/USART |
| Number of i (O) | 30 |
| Core processor | STM8 |
| Case | 32-UFQFN Exposed Pad |
| Data converters | A/D 23x12b |
| Program memory size | 4KB (4K x 8) |
Product details
Frequently asked questions
What is the difference between STM8L151K2U6 and STM8L151K3U6?
The STM8L151K3U6 is the higher-density sibling in the same package and pinout. It doubles the Flash to 8 KB and the RAM to 2 KB, while keeping the same 16 MHz core, peripheral set, and 32-UFQFPN footprint. If your firmware fits in 4 KB, the K2 is the cost-optimized choice.