STMicroelectronics STM8L151C8U6

Overview

STM8L151C8U6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, RTC, LCD controller, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, and two ultra-low-power comparators. It operates from 1.65–3.6 V across –40 to +85 °C and targets battery-powered metering, portable medical devices, and smart sensors requiring sub-µA sleep current.

For engineers reviewing the STM8L151C8U6 datasheet, STM8L151C8U6 pinout, STM8L151C8U6 application, or STM8L151C8U6 equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), fast wake-up time (4.7 µs), 67 I/Os with interrupt mapping, capacitive touch support (16 channels), and SWIM-based non-intrusive debugging.

Technical Context

The STM8L151C8U6 implements a Harvard-architecture 3-stage pipeline STM8 core running at up to 16 MHz (16 CISC MIPS peak) with 40 external interrupt sources and flexible reset management including five programmable BOR thresholds and PVD. Its clock system integrates dual crystal oscillators (32 kHz LSE, 1–16 MHz HSE), factory-trimmed 16 MHz HSI, and 38 kHz LSI with clock security system.

Low-power operation is enabled by five distinct modes: Wait (200 µA/MHz + 330 µA), Low-power Run (5.9 µA), Low-power Wait (3 µA), Active-Halt (1.4 µA with RTC), and Halt (400 nA), all supported by ultra-low I/O leakage (50 nA per pin) and fast wake-up capability.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 48 pins. Pin functions validated per STMicroelectronics DS6948 Rev 11 Figure 7 (STM8L151C8 48-pin pinout without LCD).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.

Compared with STM8L152C8U6, the STM8L151C8U6 removes redundant LCD circuitry to reduce cost and power in non-display applications; versus STM32L011K4U6, it retains analog integration (dual DACs, calibrated RTC, touch engine) essential for sensor and HMI subsystems.

Availability

STM8L151C8U6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151C8U6 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 8-bit MCU family targets energy-constrained applications such as battery-powered meters, wearable health monitors, and smart building sensors where sub-microamp sleep current and integrated analog peripherals are critical.

FAQ

What is the maximum operating frequency and core architecture of the STM8L151C8U6?

The STM8L151C8U6 features an 8-bit STM8 core with Harvard architecture and a 3-stage pipeline, achieving a maximum operating frequency of 16 MHz and a peak performance of 16 CISC MIPS. It supports up to 40 external interrupt sources and includes an advanced interrupt controller optimized for low-latency real-time response in ultra-low-power environments.

Does the STM8L151C8U6 support capacitive touch sensing, and how many channels are available?

Yes, the STM8L151C8U6 integrates a hardware-accelerated capacitive sensing controller supporting up to 16 channels. It enables touchkey, proximity, linear touch, and rotary touch sensing without external components, with built-in noise immunity and automatic recalibration - confirmed in Section 3.13 of DS6948 Rev 11.

What are the lowest power consumption modes and their typical current draw?

The lowest power mode is Halt at 400 nA (VDD = 1.65–3.6 V). Active-Halt with full RTC enabled draws 1.4 µA, Low-power Wait draws 3 µA, and Low-power Run draws 5.9 µA - all measured per Table 24–26 in DS6948 Rev 11 under specified voltage and temperature conditions.

Is the STM8L151C8U6 pin-compatible with other members of the STM8L151x6/8 family?

Yes, the STM8L151C8U6 in LQFP48 is pin-compatible with STM8L151R6/R8 (LQFP64) and STM8L151M8 (LQFP80) for shared peripheral signals, but I/O count and package dimensions differ. Pin mapping for the LQFP48 variant is fully documented in Figure 7 of DS6948 Rev 11 and validated against the device summary table.