STMicroelectronics STM8L152K6U6

Overview

STM8L152K6U6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 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 timers including an advanced control timer for motor control. It operates from 1.65 V to 3.6 V and supports industrial temperature range (–40 °C to +85 °C), targeting battery-powered metering and portable medical devices.

For engineers reviewing the STM8L152K6U6 datasheet, STM8L152K6U6 pinout, STM8L152K6U6 application, or STM8L152K6U6 equivalent, key selection criteria include active-halt current (1.3 µA with full RTC), Halt-mode leakage (350 nA), LCD segment drive capability, capacitive touch support (16 channels), and SWIM-based non-intrusive debugging.

Technical Context

The STM8L152K6U6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates dual crystal oscillators (1–16 MHz HSE and 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC with clock security system.

Power management includes five configurable low-power modes: Wait (195 µA/MHz + 440 µA), Low power run (5.1 µA), Low power wait (3 µA), Active-halt with RTC (1.3 µA), and Halt (350 nA). The RTC provides BCD calendar, alarm, and auto-wakeup with periodic interrupt - all functional in Active-halt mode without CPU wake-up.

Key Specifications

Pinout & Package

STM8L152K6U6 is packaged in UFQFPN32 (5 × 5 mm, 0.5 mm pitch, 32-pin ultra-thin fine-pitch quad flat no-lead) with wettable flanks. This RoHS-compliant, ECOPACK®2 package enables compact PCB layout and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052K6T6, STM8L152K6U6 adds LCD control and doubles Flash; versus STM32L053R8T6, it trades 32-bit compute for lower system-level power and integrated display - critical for long-life, space-constrained HMI designs.

Availability

STM8L152K6U6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical devices, industrial sensor nodes, and home automation panels requiring stable component supply across multi-year production cycles.

Supply support for STM8L152K6U6 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 analog components for industrial, automotive, and consumer markets.

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

FAQ

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

The STM8L152K6U6 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 consumption - totaling approximately 3.56 mA. This value scales linearly with frequency and is validated per Table 20 in DS6372 Rev 17.

Does the device support hardware-accelerated capacitive touch sensing?

Yes. The STM8L152K6U6 integrates a dedicated Capacitive Sensing Guider (CSG) peripheral supporting up to 16 channels. It provides hardware scan control, noise filtering, and automatic recalibration - enabling robust touchkey, proximity, linear, and rotary touch interfaces without CPU intervention.

Can the internal RTC maintain timekeeping during Halt mode?

No. The RTC remains active only in Active-halt mode (1.3 µA), where it runs from the LSE oscillator and supports calendar, alarm, and periodic wakeup. In true Halt mode (350 nA), the RTC is disabled to minimize leakage; timekeeping resumes only after wakeup and reinitialization.

Is the 12-bit DAC output available on dedicated pins or multiplexed I/O?

The 12-bit DAC output is available on three dedicated pins: PB4, PB5, and PB6. These pins are multiplexed - they function as standard GPIOs unless DAC is enabled and configured via the DAC_CR register. Each channel supports independent trigger sources and buffer enable/disable control.