STMicroelectronics STM8L152K4T6

Overview

STM8L152K4T6 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 portable instrumentation and smart sensors requiring long runtime and integrated display.

For engineers reviewing the STM8L152K4T6 datasheet, STM8L152K4T6 pinout, STM8L152K4T6 application, or STM8L152K4T6 equivalent, key selection criteria include sub-µA Halt mode current, on-chip LCD driver capability, 1.65–3.6 V operating range, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L152K4T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates dual oscillators (1–16 MHz HSE, 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC, all managed by a clock security system.

Power management includes five configurable low-power modes: Wait, Low Power Run (5.1 µA), Low Power Wait (3 µA), Active-Halt with full RTC (1.3 µA), and Halt (350 nA), with 4.7 µs wakeup latency from Halt. The RTC supports BCD calendar, alarm, and auto-wakeup with periodic interrupt.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count: 32 leads, with 29 user-configurable I/Os (including 16 touch-sensing channels), NRST, SWIM, and dedicated LCD segment/common pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C4T6, the K4T6 offers identical peripherals in a smaller LQFP32 package with reduced I/O count - ideal for cost- and size-sensitive designs. Versus STM32L011K4T6, it trades 32-bit capability for integrated LCD and lower Halt-mode current (350 nA vs 370 nA), making it superior for display-centric battery devices.

Availability

STM8L152K4T6 is available at Aetrix Electronics and suitable for smart utility meters, portable gas detectors, wireless sensor nodes, and medical wearable monitors requiring stable component supply across multi-year production cycles.

Supply support for STM8L152K4T6 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 product line targets energy-constrained applications such as battery-operated sensors, smart meters, and portable medical devices - emphasizing sub-µA sleep modes, integrated peripherals, and long-term supply stability.

FAQ

What is the minimum operating voltage for STM8L152K4T6 in Halt mode?

The STM8L152K4T6 operates down to 1.65 V in all low-power modes, including Halt. At 1.65 V, Halt mode current remains 350 nA (typical), and RTC continues functioning with LSE crystal. Below 1.65 V, BOR thresholds ensure safe reset before functional failure.

Does STM8L152K4T6 support capacitive touch sensing without external components?

Yes - the device integrates a hardware-accelerated capacitive sensing controller supporting up to 16 channels. It uses built-in charge-transfer measurement and noise filtering, requiring only PCB electrodes and no external RC networks or dedicated touch ICs.

Can the internal 12-bit DAC drive analog actuators directly?

The buffered 12-bit DAC provides rail-to-rail output with ±1 LSB INL/DNL and 1 µA max output leakage. It can directly drive low-current analog inputs (e.g., op-amp references, sensor biasing), but not high-current loads like motors or LEDs - external amplification is required for those.

Is SWIM debugging supported in all low-power modes?

SWIM is fully operational in Run, Wait, and Low Power Run modes. In Low Power Wait, Active-Halt, and Halt modes, SWIM enters standby and requires a dedicated wakeup pulse on the SWIM pin to resume communication - documented in Section 3.19 of DS6372 Rev 17.