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STMicroelectronics STM8L151C8U3 — Microcontrollers & Processors (MCU / MPU / DSP)

STM8L151C8U3 8-bit MCU, 16 MHz, 64 KB Flash, -40 to 125 °C

MPNSTM8L151C8U3
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STMicroelectronics STM8L EnergyLite series, STM8L151C8U3, 8-bit STM8 core at 16 MHz, 64 KB FLASH, 4 KB RAM, 2 KB EEPROM, 41 I/O, 25-channel 12-bit ADC, 2-channel 12-bit DAC, I²C/SPI/USART/IrDA, 1.8–3.6 V supply, -40 to 125 °C, 48-UFQFN exposed-pad (7×7 mm) tray.

$4.1600Ref. price · indicative, final on quote
STMicroelectronics STM8L151C8U3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8L151C8U3 specifications
ParameterValue
SeriesSTM8L EnergyLite
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 3.6V
Operating temperature-40°C~125°C(TA)
Speed16MHz
PackageTray
RAM size4K x 8
Core size8-Bit
EEPROM size2K x 8
PeripheralsBrown-out Detect/Reset, DMA, IR, POR, PWM, WDT
ConnectivityI²C, IrDA, SPI, UART/USART
Number of i (O)41
Core processorSTM8
Case48-UFQFN Exposed Pad
Data convertersA/D 25x12b; D/A 2x12b
Program memory size64KB (64K x 8)

Product details

16 MHz core with 64 KB Flash — sizing the control-loop headroom

The STM8L151C8U3 is an 8-bit MCU from ST's STM8L EnergyLite series, built around the STM8 core clocked at 16 MHz. It carries 64 KB of program Flash, 4 KB of RAM, and 2 KB of EEPROM — enough for moderate firmware images and data logging in battery-operated or thermally demanding applications.

Peripheral set: 25-channel ADC and dual DAC reduce external count

The 41 I/O lines, plus I²C, SPI, USART, and IrDA connectivity, cover common serial buses for display, memory, and radio modules.

Package and thermal path for extended-temperature designs

For dual-sourcing resilience, the STM8L151C6U3 (32 KB Flash variant) is pin-compatible across the same package and temperature grade — a straightforward drop-in if the firmware fits the smaller memory.

Frequently asked questions

Can STM8L151C8U3 replace STM8L151C6U3?

Yes, the STM8L151C8U3 is pin-compatible with the STM8L151C6U3 in the same 48-UFQFN package. The C8 variant doubles the Flash from 32 KB to 64 KB, so it is a drop-in upgrade if the firmware fits the larger memory.