STMicroelectronics STM8L151G6U7

Overview

STM8L151G6U7 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 (1 Msps, 25 channels), 12-bit DAC, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup, and capacitive touch sensing (up to 16 channels). It operates from 1.65 V to 3.6 V across –40 °C to 85 °C and targets battery-powered metering, portable medical devices, and smart sensors.

For engineers reviewing the STM8L151G6U7 datasheet, STM8L151G6U7 pinout, STM8L151G6U7 application, or STM8L151G6U7 equivalent, key selection criteria include active-halt current (1.3 µA with full RTC), Halt mode consumption (350 nA), fast wakeup time (4.7 µs), 41 mappable I/Os, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L151G6U7 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual clock domains: high-speed (1–16 MHz HSE or 16 MHz factory-trimmed RC) and low-speed (32 kHz LSE or 38 kHz low-consumption RC), managed by a clock security system for fault detection.

Its power architecture supports five distinct low-power modes-Wait, Low Power Run (5.1 µA), Low Power Wait (3 µA), Active-Halt (1.3 µA with RTC), and Halt (350 nA)-with per-I/O leakage limited to 50 nA and guaranteed 4.7 µs wake-up from Halt. The RTC operates independently in Active-Halt using the 32 kHz LSE oscillator.

Key Specifications

Pinout & Package

STM8L151G6U7 is packaged in UFQFPN28 (4 × 4 mm, 0.5 mm pitch), a space-constrained, thermally efficient package suitable for compact portable electronics. Pin functions are validated per ST's DS6372 Rev 17, Table 5 (pin description) and Figure 5 (UFQFPN28 pinout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052C6T6, STM8L151G6U7 adds RTC, DAC, and EEPROM ECC for time-critical and analog-intensive use cases; versus STM32L053R8T6, it delivers lower system-level power in deeply embedded roles while retaining SWIM debug simplicity and smaller code footprint.

Availability

STM8L151G6U7 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and home automation touch panels requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151G6U7 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, sensors, and analog components for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU product line targets energy-constrained applications such as battery-operated meters, wearables, and IoT edge nodes, emphasizing sub-µA sleep modes, integrated analog peripherals, and robust development tooling.

FAQ

What is the minimum operating voltage for STM8L151G6U7 in Halt mode?

The STM8L151G6U7 supports Halt mode operation down to 1.65 V, with typical current consumption of 350 nA across the full 1.65–3.6 V supply range. This enables reliable operation with aging primary batteries or supercapacitor backup systems without brownout risk.

Does STM8L151G6U7 support hardware-accelerated capacitive touch sensing?

Yes - it integrates a dedicated capacitive sensing controller supporting up to 16 channels with hardware acquisition, noise filtering, and automatic recalibration. It supports touchkey, proximity, linear slider, and rotary wheel configurations without CPU intervention.

Can the 12-bit DAC output drive external loads directly?

The integrated 12-bit DAC includes an output buffer capable of sourcing/sinking ±5 mA, enabling direct drive of small analog circuits (e.g., op-amp inputs, transducer biasing, or LED dimming) without external amplification - verified per DS6372 Table 52.

Is SWIM debugging supported in all low-power modes?

SWIM debugging remains active in Run, Wait, and Low Power Wait modes. It is disabled in Active-Halt and Halt modes to preserve ultra-low current; however, the device can be woken via RTC alarm or external interrupt and re-enter debuggable state within 4.7 µs.