STMicroelectronics STM8L152C4U6

Overview

STM8L152C4U6 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 STM8L152C4U6 datasheet, STM8L152C4U6 pinout, STM8L152C4U6 application, or STM8L152C4U6 equivalent, key selection criteria include sub-µA Halt current, integrated LCD driver with step-up converter, dual comparator wakeup capability, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L152C4U6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates four oscillators: 1–16 MHz HSE, 32 kHz LSE, 16 MHz factory-trimmed HSI, and 38 kHz LSI - all configurable via clock security system for fail-safe operation.

Power management includes five 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 reliable operation in deep sleep states.

Key Specifications

Pinout & Package

STM8L152C4U6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. This compact, fine-pitch package supports high-density PCB layouts and improved thermal dissipation for extended low-power operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C4U6, the C6U6 offers double Flash without altering power profile or pinout, while the STM32L051C8U6 trades ultra-low Halt current for 32-bit architecture and broader ecosystem support - critical for firmware complexity versus battery lifetime trade-offs.

Availability

STM8L152C4U6 is available at Aetrix Electronics and suitable for smart utility meters, portable environmental sensors, industrial panel indicators, and low-power thermostats requiring stable component supply across multi-year production cycles.

Supply support for STM8L152C4U6 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 products for industrial, automotive, and consumer markets.

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

FAQ

What is the minimum operating voltage for STM8L152C4U6 in Halt mode?

The STM8L152C4U6 operates down to 1.65 V in Halt mode, with guaranteed 350 nA current consumption across this range. Below 1.65 V, Brown-Out Reset (BOR) activates at user-selectable thresholds (1.65 V, 1.9 V, 2.2 V, 2.5 V, or 2.8 V) to prevent undefined behavior during battery depletion.

Does STM8L152C4U6 support capacitive touch sensing without external components?

Yes - it integrates a dedicated capacitive sensing controller supporting up to 16 channels. It uses internal charge-transfer measurement with automatic calibration, eliminating external RC networks or dedicated touch ICs for touchkey, proximity, linear, and rotary implementations.

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

The 12-bit DAC features an integrated output buffer on PB4–PB6, capable of sourcing/sinking ±2 mA with rail-to-rail swing. It can directly drive low-impedance loads like op-amp inputs or small transducers, but not high-current devices such as LEDs or motors without external amplification.

Is SWIM debugging supported in all low-power modes?

SWIM debugging remains functional in Run, Wait, and Low Power Run modes. It is disabled in Low Power Wait, Active-Halt, and Halt modes - consistent with the architecture's power isolation design. Debug session resumption requires a reset or wakeup event to re-enable the interface.