STMicroelectronics STM8L151K4T6

Overview

STM8L151K4T6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 16 MHz STM8 core, 16 KB Flash, 1 KB Data EEPROM with ECC, RTC, 12-bit ADC (1 Msps, 25 channels), and dual ultra-low-power comparators. It operates from 1.8–3.6 V across –40 °C to +85 °C and targets battery-powered sensor nodes and portable medical devices requiring sub-µA halt mode (350 nA) and fast wakeup (4.7 µs).

For engineers reviewing the STM8L151K4T6 datasheet, STM8L151K4T6 pinout, STM8L151K4T6 application, or STM8L151K4T6 equivalent, key selection criteria include its 32-pin LQFP package, 16 KB Flash memory size, 1.3 µA active-halt mode with full RTC, 41 GPIOs (all interrupt-capable), and integrated capacitive touch sensing support for up to 16 channels.

Technical Context

The STM8L151K4T6 implements a Harvard-architecture 3-stage pipeline STM8 core delivering 16 CISC MIPS at 16 MHz, with up to 40 external interrupt sources and SWIM-based non-intrusive debugging. 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 monitoring.

Power management includes five configurable low-power modes - Wait (5.1 µA), Low Power Wait (3 µA), Active-Halt with RTC (1.3 µA), and Halt (350 nA) - supported by programmable voltage detector (PVD), ultra-safe BOR with 5 thresholds, and per-I/O leakage as low as 50 nA.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32 leads; RoHS-compliant, ECOPACK® certified, and rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L051F3P6, the STM8L151K4T6 adds RTC, DAC, and touch sensing at modest cost premium; versus STM32L011D4P6, it trades 32-bit flexibility for lower power in analog-intensive edge nodes and eliminates external touch components.

Availability

STM8L151K4T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and home automation touch interfaces requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151K4T6 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, MEMS, and automotive semiconductors since 1987.

The STM8L ultra-low-power MCU product line targets energy-constrained applications such as battery-operated sensors, wearables, and smart meters, emphasizing sub-µA sleep modes, integrated analog peripherals, and robust industrial qualification.

FAQ

What is the maximum operating frequency and core type of the STM8L151K4T6?

The STM8L151K4T6 features an 8-bit STM8 core with a maximum operating frequency of 16 MHz, achieving 16 CISC MIPS peak performance. It uses a Harvard architecture with a 3-stage pipeline for deterministic instruction execution and efficient code density, optimized for ultra-low-power embedded control tasks.

Does the STM8L151K4T6 support hardware-accelerated capacitive touch sensing?

Yes, the STM8L151K4T6 integrates a dedicated hardware touch sensing controller supporting up to 16 channels for touchkey, proximity, linear, and rotary touch applications. This engine operates independently of the CPU, enabling low-power wake-on-touch functionality with minimal firmware overhead and no external components.

What low-power modes are available and what is the lowest current consumption?

The STM8L151K4T6 offers five low-power modes: Wait (5.1 µA), Low Power Wait (3 µA), Active-Halt with RTC (1.3 µA), Halt (350 nA), and Power-down (with VDD off). The lowest active mode is Halt at 350 nA (1.8 V, 25 °C), retaining RTC operation and RAM content while allowing sub-5 µs wakeup to full-speed execution.

Is the STM8L151K4T6 pin-compatible with other members of the STM8L151 family?

No - the STM8L151K4T6 uses a 32-pin LQFP package, while STM8L151C4/C6 use 48-pin LQFP and STM8L151G4/G6 use 28-pin UFQFPN. Pinouts differ across packages; migration requires PCB redesign. However, software is largely compatible within the STM8L151x4 series due to identical peripheral register maps and instruction set.