STMicroelectronics STM8L152K4T6TR

Overview

STM8L152K4T6TR 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, LCD controller (4×28 segments), 12-bit ADC (1 Msps, 25 channels), 12-bit DAC, two ultra-low-power comparators, and multiple low-power modes including Halt (350 nA). It targets battery-powered metering, portable medical devices, and smart sensors requiring long runtime and integrated analog peripherals.

For engineers reviewing the STM8L152K4T6TR datasheet, STM8L152K4T6TR pinout, STM8L152K4T6TR application, or STM8L152K4T6TR equivalent, key selection criteria include verified 350 nA Halt-mode current, LCD segment drive capability, 1.65–3.6 V operating range, 96-bit unique ID, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L152K4T6TR 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-power (32 kHz LSE or 38 kHz RC), managed by a clock security system with fail-safe detection.

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 fast 4.7 µs wakeup from Halt. The RTC operates independently in Active-Halt mode using the 32 kHz crystal oscillator, maintaining calendar time and alarm functionality while minimizing current draw.

Key Specifications

Pinout & Package

STM8L152K4T6TR is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch), optimized for compact industrial and portable designs. Pin count and layout align with STM8L151K4/K6 and STM8L152K4/K6 variants in the K-series 32-pin footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152K4T6TR, the K6 variant offers scalable Flash/RAM within identical low-power and LCD capabilities, while the STM32L053 trades ultra-low Halt current and integrated LCD for 32-bit performance and peripheral breadth - making it less suitable for cost- and power-constrained LCD-display applications.

Availability

STM8L152K4T6TR is available at Aetrix Electronics and suitable for smart metering, portable diagnostics, and industrial wireless sensor networks requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature ranges.

Supply support for STM8L152K4T6TR 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 products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU family targets energy-constrained applications such as battery-operated meters, wearables, and IoT edge nodes - emphasizing sub-µA sleep modes, integrated analog peripherals, and robust operation across extended temperature ranges.

FAQ

What is the minimum operating voltage for STM8L152K4T6TR?

The STM8L152K4T6TR operates down to 1.65 V in all active and low-power modes, with guaranteed functionality including Flash programming and RTC operation. This enables reliable use with aging primary batteries or energy-harvesting sources where voltage sags below 1.8 V.

Does STM8L152K4T6TR support capacitive touch sensing?

Yes - it integrates hardware-accelerated capacitive sensing supporting up to 16 channels, compatible with touchkey, proximity, linear slider, and rotary wheel configurations. No external components are required, and sensing operates concurrently with low-power modes.

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

The integrated 12-bit DAC features an output buffer capable of sourcing/sinking ±5 mA, allowing direct driving of small analog circuits like op-amp references or LED bias. Output is available on PB4–PB6 pins, with configurable gain and alignment per datasheet Table 52.

Is SWIM debugging supported in all power modes?

SWIM interface remains functional in Run, Wait, and Low Power Run modes. It is disabled in Low Power Wait, Active-Halt, and Halt modes - consistent with ultra-low-power design goals. Debug access must be re-established after waking to Run mode.