STMicroelectronics STM8L152C6U3

Overview

STM8L152C6U3 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 (up to 25 channels, 1 Msps), 12-bit DAC, two ultra-low-power comparators, and multiple timers including an advanced control timer for motor applications. 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 STM8L152C6U3 datasheet, STM8L152C6U3 pinout, STM8L152C6U3 application, or STM8L152C6U3 equivalent, key selection criteria include active-halt current (1.3 µA with RTC), LCD segment drive capability, SWIM debug interface compatibility, and low-voltage operation down to 1.65 V in power-down mode.

Technical Context

The STM8L152C6U3 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. 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, all managed by a clock security system.

Power management includes five configurable low-power modes-Halt (350 nA), Active-halt with RTC (1.3 µA), Low power wait (3 µA), Low power run (5.1 µA), and Wait-with fast 4.7 µs wakeup from Halt. The device features dedicated hardware for capacitive touch sensing (up to 16 channels) and integrated step-up converter for LCD bias generation.

Key Specifications

Pinout & Package

STM8L152C6U3 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 MCU applications.

Compared with STM8L152C6T6, the U3 variant offers superior space efficiency in dense layouts; versus STM32L053R8T6, it trades 32-bit capability for integrated LCD and simpler toolchain, making it optimal for cost-sensitive, display-centric ultra-low-power designs.

Availability

STM8L152C6U3 is available at Aetrix Electronics and suitable for smart utility metering, portable medical devices, industrial sensor nodes, and home automation controllers requiring stable component supply across multi-year production cycles.

Supply support for STM8L152C6U3 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 components for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU product line targets battery-operated and energy-harvesting applications where extended runtime, robust RTC functionality, and integrated analog peripherals-including LCD drivers and capacitive touch-are critical design requirements.

FAQ

What is the maximum operating frequency and corresponding power consumption of STM8L152C6U3?

The STM8L152C6U3 achieves a maximum system clock frequency of 16 MHz using the HSE crystal or factory-trimmed 16 MHz RC oscillator. At this speed and 3.3 V supply, typical active-mode current is 195 µA/MHz plus 440 µA base consumption - totaling approximately 3.56 mA. This value scales linearly with clock frequency and is validated per Table 20 in DS6372 Rev 17.

Does STM8L152C6U3 support in-circuit debugging and programming?

Yes, the STM8L152C6U3 supports non-intrusive on-chip debugging and programming via the Single-Wire Interface Module (SWIM) using one dedicated pin (SWIM). It enables full-speed execution halting, register inspection, Flash memory read/write, and real-time variable monitoring without requiring additional debug hardware beyond a SWIM-compatible programmer.

How many LCD segments can STM8L152C6U3 drive, and what voltage support does it provide?

The STM8L152C6U3 integrates an LCD controller capable of driving up to 4 commons and 28 segments (4×28 configuration). It includes an internal step-up converter generating VLCD voltage (typically ~3.0 V to ~4.5 V depending on VDD and load), eliminating the need for external charge-pump ICs and simplifying BOM for segment-based displays.

What are the key differences between STM8L152C6U3 and STM8L151C6U3?

The STM8L152C6U3 includes an integrated LCD controller and step-up converter, while the STM8L151C6U3 omits these blocks. Both share identical core, memory, ADC/DAC, timers, and low-power architecture. The '152' variant is selected exclusively when direct LCD segment driving is required; otherwise, the '151' offers equivalent MCU functionality at lower unit cost and reduced pin count.