STMicroelectronics STM8L152C6U6

Overview

STM8L152C6U6 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), deployed in battery-powered metering and portable medical devices.

For engineers reviewing the STM8L152C6U6 datasheet, STM8L152C6U6 pinout, STM8L152C6U6 application, or STM8L152C6U6 equivalent, key selection considerations include its 350 nA Halt-mode current, 4.7 µs wake-up time, LCD step-up converter integration, capacitive touch sensing support (16 channels), and SWIM-based non-intrusive debugging capability.

Technical Context

The STM8L152C6U6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system includes dual crystal oscillators (1–16 MHz HSE and 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC - all managed by a clock security system with fail-safe detection.

Power management integrates 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 full RTC (1.3 µA), and Halt (350 nA). I/O leakage is specified at ≤50 nA per pin, enabling long-term battery operation in always-on sensor nodes.

Key Specifications

Pinout & Package

STM8L152C6U6 is packaged in UFQFPN48 (7 × 7 mm, 0.5 mm pitch), a space-efficient, thermally enhanced quad flat no-lead package suitable for compact portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152K6T6, the STM8L152C6U6 offers 16 more GPIOs and LCD support in a larger package; versus STM32L053R8T6, it trades 32-bit capability for lower system-level BOM cost and guaranteed sub-µA Halt operation with native display control.

Availability

STM8L152C6U6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial sensor nodes, and home automation panels requiring stable component supply across extended product lifecycles.

Supply support for STM8L152C6U6 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-grade components since 1987.

The STM8L ultra-low-power MCU family targets battery-operated and energy-harvesting applications demanding sub-microamp standby, integrated analog peripherals, and long-term reliability - especially in metering, healthcare, and industrial sensing.

FAQ

What is the minimum operating voltage for STM8L152C6U6 in Halt mode?

The STM8L152C6U6 supports Halt mode operation down to 1.65 V, maintaining RTC functionality and memory retention. At this voltage, typical Halt current is 350 nA, and the device retains full register state and SRAM contents. The ultra-safe BOR circuit provides five selectable thresholds to ensure reliable reset behavior across varying battery discharge profiles.

Does STM8L152C6U6 support capacitive touch sensing without external components?

Yes - the STM8L152C6U6 integrates a dedicated hardware capacitive sensing controller supporting up to 16 channels. It performs auto-calibration, noise filtering, and baseline tracking internally, requiring only PCB copper electrodes and no external RC networks or dedicated touch ICs. This enables robust touchkey, linear slider, and rotary encoder implementations with <10 µA average current draw.

Can the built-in LCD controller drive segment displays without external voltage boosting?

Yes - the STM8L152C6U6 includes an integrated step-up converter that generates the required LCD bias voltage (up to 4.2 V) from the main VDD supply (1.65–3.6 V). This allows direct driving of 4×28 static or multiplexed segment displays without external charge pumps or DC-DC converters, reducing bill-of-materials and PCB complexity.

Is SWIM debugging supported in all low-power modes?

SWIM debugging remains active in Run, Wait, and Low power run modes, but is disabled in Low power wait, Active-halt, and Halt modes to preserve ultra-low current. Breakpoint-triggered wake-up from Halt is not supported; however, the device can be reactivated via external interrupt or RTC alarm, then reconnected to the debugger in Run mode for post-event analysis.