STMicroelectronics STM8L152C4T3

Overview

STM8L152C4T3 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 metering, portable medical devices, and smart sensors requiring long runtime and integrated display.

For engineers reviewing the STM8L152C4T3 datasheet, STM8L152C4T3 pinout, STM8L152C4T3 application, or STM8L152C4T3 equivalent, key selection criteria include verified 350 nA Halt-mode current, LCD segment drive capability, 1.65–3.6 V operating range, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L152C4T3 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, 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), with 4.7 µs wake-up from Halt and 50 nA per I/O leakage.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 41 user-configurable I/Os, all mappable to interrupt vectors; includes dedicated LCD segment/common pins (SEG0–SEG31, COM0–COM3), SWIM debug interface (PA1), and NRST with programmable BOR threshold.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C4T3, the C6T3 variant adds memory headroom without altering power profile or LCD capability, while the STM32L011K4T6 trades LCD integration for 32-bit performance and cryptographic features - selection depends on display necessity versus processing scalability.

Availability

STM8L152C4T3 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM8L152C4T3 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 products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU product line targets battery- and energy-harvesting–powered applications demanding multi-year operation, integrated peripherals (LCD, RTC, ADC), and minimal external component count.

FAQ

What is the minimum operating voltage for STM8L152C4T3?

The STM8L152C4T3 operates down to 1.65 V in all modes, including Halt and Active-Halt, enabling compatibility with aging primary batteries and low-voltage energy harvesters. This is confirmed in Section 9.3.1 of DS6372 Rev 17, with full functionality maintained across the 1.65–3.6 V range.

Does STM8L152C4T3 support in-circuit debugging without dedicated debug pins?

Yes - it uses the SWIM (Single-Wire Interface Module) protocol on PA1, requiring only one I/O pin for full programming, erasing, and real-time debugging. No JTAG or SWD header is needed, preserving I/O resources and simplifying PCB layout.

Can the integrated LCD controller drive common-anode or common-cathode displays?

The STM8L152C4T3 LCD controller supports both common-anode and common-cathode configurations via software-selectable bias generation and COM/SEG polarity inversion. It delivers up to 4×28 segments with internal step-up converter, eliminating external voltage boosters.

How many I/O pins support external interrupt capability?

All 41 general-purpose I/O pins on the STM8L152C4T3 can be individually mapped to external interrupt vectors. Each port supports edge-triggered interrupts (rising/falling/both), and NVIC prioritization is managed through the interrupt controller registers per Section 3.2.2 of DS6372.