STMicroelectronics STM8L151G6U3TR

Overview

STM8L151G6U3TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 1 KB data EEPROM with ECC, 2 KB RAM, 12-bit ADC (up to 25 channels, 1 Msps), 12-bit DAC, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup, and capacitive touch sensing support - deployed in battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM8L151G6U3TR datasheet, STM8L151G6U3TR pinout, STM8L151G6U3TR application, or STM8L151G6U3TR equivalent, key selection criteria include sub-µA halt-mode current (350 nA), 4.7 µs wake-up time, 1.65–3.6 V operating range, and UFQFPN28 package compatibility for space-constrained designs.

Technical Context

The STM8L151G6U3TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates dual oscillators (1–16 MHz HSE, 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC with clock security system.

Power management includes five low-power modes: Wait (195 µA/MHz + 440 µA), Low power run (5.1 µA), Low power wait (3 µA), Active-halt with full RTC (1.3 µA), and Halt (350 nA). I/O leakage is specified at 50 nA per pin, and reset features include programmable voltage detector (PVD) and 5-threshold BOR.

Key Specifications

Pinout & Package

STM8L151G6U3TR is housed in a 28-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 × 4 mm body, 0.5 mm pitch, with exposed thermal pad. Pin count and I/O mapping align with medium-density STM8L151x6 variants excluding LCD functionality.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.

Compared with STM8L151G6U3TR, STM8L152K6T3 adds LCD capability at the cost of package size and BOM complexity, while STM32L053R8T6 trades deterministic 8-bit simplicity for scalable 32-bit performance - making G6U3TR optimal for cost-sensitive, deeply embedded, battery-constrained applications requiring minimal firmware overhead.

Availability

STM8L151G6U3TR is available at Aetrix Electronics and suitable for battery-powered industrial sensors, portable medical monitors, and wireless telemetry nodes requiring stable component supply and long-term production continuity.

Supply support for STM8L151G6U3TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive semiconductors since 1987.

The STM8L ultra-low-power MCU product line targets energy-constrained applications including utility meters, wearables, and sensor nodes - emphasizing sub-µA sleep modes, integrated analog peripherals, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating temperature range for STM8L151G6U3TR?

The STM8L151G6U3TR is qualified for operation from –40 °C to +85 °C, with extended variants supporting up to +105 °C or +125 °C. This rating is validated per ST's production test flow and applies across the full 1.65–3.6 V supply range, ensuring reliability in industrial and automotive-adjacent environments.

Does STM8L151G6U3TR support in-system programming via SWIM?

Yes - the device uses ST's Single-Wire Interface Module (SWIM) for non-intrusive debugging and flash programming. Only one dedicated pin (SWIM) is required, enabling firmware updates in the field without removing the MCU from the PCB or using complex JTAG adapters.

How many I/O pins are accessible in the UFQFPN28 package?

The STM8L151G6U3TR in UFQFPN28 provides 28 pins total, of which 25 are user-configurable I/Os (excluding VDD, VSS, NRST, and SWIM). All 25 support interrupt mapping and capacitive sensing, matching the functional I/O count specified for the G6 variant in Table 1 of DS6372 Rev 17.

Is the 1 KB data EEPROM endurance specified in the datasheet?

Yes - the data EEPROM is rated for 300,000 write/erase cycles and 20-year data retention at 55 °C, with built-in ECC for error correction. These values are measured and guaranteed per ST's qualification standards and documented in Section 9.3.5 "Memory characteristics" of DS6372 Rev 17.