STMicroelectronics STM8L152R6T6

Overview

STM8L152R6T6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 2 KB data EEPROM, RTC with ±0.5 ppm accuracy, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DAC, LCD controller (4×44/8×40), and 67 I/Os in LQFP64 package. It operates from 1.65–3.6 V across –40 to +85 °C and targets battery-powered metering, portable medical devices, and smart sensors requiring sub-µA sleep current.

For engineers reviewing the STM8L152R6T6 datasheet, STM8L152R6T6 pinout, STM8L152R6T6 application, or STM8L152R6T6 equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), fast wake-up time (4.7 µs), capacitive touch support (16 channels), and integrated LCD step-up converter - all validated for industrial-grade reliability and long-life energy harvesting designs.

Technical Context

The STM8L152R6T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates three oscillators: 32 kHz LSE for RTC, 1–16 MHz HSE for main operation, and factory-trimmed 16 MHz HSI with ±1% accuracy over temperature and voltage.

Power management includes five low-power modes - including Active-halt (1.4 µA with RTC running) and Halt (400 nA) - enabled by independent voltage regulators, programmable BOR thresholds, and per-pin leakage control (50 nA/I/O). The RTC supports BCD calendar, alarm interrupt, digital calibration, and anti-tamper detection.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 67 general-purpose I/Os, all mappable to interrupt vectors, plus dedicated LCD segment/common pins (PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.

Compared with STM8L152C8T6, the STM8L152R6T6 trades Flash capacity for lower unit cost and smaller code footprint; versus STM32L053R8T6, it delivers superior µA/MHz efficiency and simpler development for deterministic 8-bit control tasks - making it optimal for cost-sensitive, battery-limited edge nodes.

Availability

STM8L152R6T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.

Supply support for STM8L152R6T6 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 automotive semiconductors since 1987.

The STM8L ultra-low-power family targets battery-operated and energy-harvesting applications where sub-microamp sleep current, RTC precision, and integrated analog peripherals reduce system complexity - exemplified by the STM8L152R6T6's design for metering and portable HMI.

FAQ

What is the maximum operating frequency and core architecture of the STM8L152R6T6?

The STM8L152R6T6 features an 8-bit STM8 core with Harvard architecture and 3-stage pipeline, achieving a maximum operating frequency of 16 MHz and 16 CISC MIPS peak performance. It uses a single-cycle instruction set optimized for deterministic real-time control, with no cache or MMU - ensuring predictable timing for safety-critical and low-latency applications.

Does the STM8L152R6T6 support capacitive touch sensing, and how many channels are available?

Yes, the STM8L152R6T6 integrates a hardware-accelerated capacitive sensing controller supporting up to 16 channels. It natively handles touchkey, proximity, linear slider, and rotary touch configurations with built-in de-bounce, auto-calibration, and noise immunity - eliminating the need for external touch ICs in human-machine interface designs.

What RTC accuracy can be achieved, and is external calibration required?

The integrated RTC achieves ±0.5 ppm accuracy over temperature and voltage using digital calibration against the 32.768 kHz LSE crystal - no external trimming or manual calibration is required. This level of precision enables decade-scale timekeeping in battery-powered logging applications without periodic correction.

Is the STM8L152R6T6 pin-compatible with other members of the STM8L152x6/8 series?

Yes, the STM8L152R6T6 in LQFP64 is pin-compatible with STM8L152R8T6 and STM8L152C8T6 (same package), sharing identical pin functions and electrical characteristics. Differences are limited to Flash size (32 KB vs 64 KB) and option byte configuration - enabling scalable design reuse without PCB revision.