STMicroelectronics STM8L151G6U7TR

Overview

STM8L151G6U7TR 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 (16 channels). It operates from 1.65 V to 3.6 V across –40 °C to 125 °C and targets battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM8L151G6U7TR datasheet, STM8L151G6U7TR pinout, STM8L151G6U7TR application, or STM8L151G6U7TR 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 GPIOs with interrupt mapping, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L151G6U7TR 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.

Its power architecture supports five distinct low-power modes-Wait, Low Power Run (5.1 µA), Low Power Wait (3 µA), Active-Halt with RTC (1.3 µA), and Halt (350 nA)-with per-I/O leakage limited to 50 nA and guaranteed 4.7 µs wake-up from Halt mode.

Key Specifications

Pinout & Package

STM8L151G6U7TR is housed in a 28-pin UFQFPN package (4 × 4 mm, 0.5 mm pitch), optimized for space-constrained portable electronics. Pin functions are validated per ST's DS6372 Rev 17, Table 5 ("Medium-density STM8L151x4/6, STM8L152x4/6 pin description").

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052C6T6, STM8L151G6U7TR adds DAC, RTC calendar, and touch sensing at identical footprint; versus STM32L053R8T6, it delivers lower system-level power and simpler analog integration but lacks 32-bit performance and modern IP licensing flexibility.

Availability

STM8L151G6U7TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and capacitive touch remotes requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151G6U7TR 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 ICs, sensors, and automotive semiconductors since 1987.

The STM8L series was engineered specifically for ultra-low-power battery-operated applications demanding sub-microamp sleep currents, robust analog integration, and industrial-grade reliability across extended temperature ranges.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM8L151G6U7TR achieves a maximum CPU frequency of 16 MHz. At this speed and VDD = 3.3 V, typical active current is 195 µA/MHz plus 440 µA base overhead, totaling approximately 3.56 mA. This value is measured with all peripherals disabled and includes core, memory, and clock system consumption per DS6372 Rev 17, Table 20.

Does STM8L151G6U7TR support hardware-accelerated AES or cryptographic functions?

No. The STM8L151G6U7TR does not include dedicated cryptographic accelerators or hardware AES engines. It relies on software-based encryption libraries for security functions. For hardware crypto, ST's STM32L4 or STM32U5 series provide AES-128/256, PKA, and TRNG modules.

Can the internal 38 kHz RC oscillator be used as the RTC clock source?

Yes. The internal 38 kHz low-consumption RC oscillator is explicitly supported as an RTC clock source in Active-Halt and Halt modes. Its typical accuracy is ±10% at 25 °C, making it suitable for non-precision timing tasks like periodic wake-up intervals where absolute calendar accuracy is not required.

Is the 1 KB data EEPROM endurance specified, and what is its write/erase cycle rating?

Yes. The 1 KB data EEPROM is rated for 300,000 write/erase cycles and 20-year data retention at 55 °C, as confirmed in DS6372 Rev 17, Section 9.3.5 ("Memory characteristics") and Table 36. ECC protection ensures bit-error correction during read operations, enhancing long-term reliability in field deployments.