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STMicroelectronics STM8L101G3U6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM8L101G3U6 STM8L EnergyLite 8-bit MCU, 16 MHz, 8 KB Flash

MPNSTM8L101G3U6
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STMicroelectronics STM8L101G3U6, STM8L EnergyLite series, 8-bit MCU, 16 MHz, 8 KB Flash, 1.5 KB RAM, 2 KB EEPROM, 1.65 V to 3.6 V, -40°C to 85°C, 28-UFQFPN.

$2.1300Ref. price · indicative, final on quote
STMicroelectronics STM8L101G3U6 datasheet (PDF)
Packaging28-UFQFN
RoHSROHS3 Compliant
SeriesSTM8L EnergyLite
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM8L101G3U6 specifications
ParameterValue
SeriesSTM8L EnergyLite
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed16MHz
PackageTray
RAM size1.5K x 8
Core size8-Bit
EEPROM size2K x 8
PeripheralsInfrared, POR, PWM, WDT
ConnectivityI²C, SPI, UART/USART
Number of i (O)26
Core processorSTM8
Case28-UFQFN
Program memory size8KB (8K x 8)

Product details

The STMicroelectronics STM8L101G3U6 is an 8-bit microcontroller from the STM8L EnergyLite series, built around the STM8 core and clocked at 16 MHz.

Memory and peripherals — sizing the BOM fit

With 8 KB of Flash and 1.5 KB of RAM, this MCU targets code-constrained applications like simple sensor nodes, IR remote controls, or PWM-driven LED drivers. The 2 KB EEPROM provides non-volatile storage for calibration constants or configuration parameters without needing an external serial EEPROM.

Package and power — board-level decisions

Housed in a 28-UFQFPN package measuring 4x4 mm, the STM8L101G3U6 saves board area in compact designs. The 1.65 V minimum supply allows direct battery operation from a single alkaline or Li-ion cell without a boost converter; the 3.6 V maximum covers standard 3.3 V rails with headroom for ripple.

Frequently asked questions

Can STM8L101G3U6 be programmed with ST-Link?

Yes, the STM8L101G3U6 uses the STM8 core and supports programming via ST-Link tools through the SWIM (Single Wire Interface Module) debug interface, which is standard on ST-Link programmers.

What is the difference between STM8L101G3U6 and STM8L101G2U6?

The primary difference is program memory: the G3 variant has 8 KB of Flash, while the G2 variant has 4 KB. Both share the same 16 MHz core, 1.5 KB RAM, 2 KB EEPROM, package, and temperature range. The G3 suits designs needing more firmware space.

What is STM8L101G3U6's listed speed?

The core runs at 16 MHz, which is the maximum clock frequency for the STM8L101 series. This speed supports I²C, SPI, and UART communication without wait states when the Flash prefetch is configured correctly.