STMicroelectronics STM8L052C6T6TR

Overview

STM8L052C6T6TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring a Harvard-architecture STM8 core, 32 KB Flash, 256-byte ECC-protected data EEPROM, integrated LCD controller (4×28 segments), RTC with BCD calendar and alarm, 12-bit ADC (1 Msps, 25 channels), and multiple low-power modes down to 350 nA in Halt. It operates from 1.8 V to 3.6 V across –40 °C to +85 °C and targets battery-powered metering and portable instrumentation.

For engineers reviewing the STM8L052C6T6TR datasheet, STM8L052C6T6TR pinout, STM8L052C6T6TR application, or STM8L052C6T6TR equivalent, key selection considerations include its 350 nA Halt-mode current, 4.7 µs wakeup latency, LCD driver with internal step-up converter, dual watchdog timers (window + independent), and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L052C6T6TR implements a 3-stage pipelined Harvard-architecture core running at up to 16 MHz (16 CISC MIPS peak), with 40+ configurable interrupt sources and fast on-chip programming via SWIM. Its clock system integrates three oscillators: 32 kHz LSE for RTC, factory-trimmed 16 MHz HSI, and 38 kHz LSI - all supported by a clock security system detecting external oscillator failure.

Power management includes five distinct low-power modes: Wait (full-speed peripherals active), Low-power Run (5.1 µA @ 1.8 V), Low-power Wait (3 µA), Active-Halt with RTC (1.3 µA), and Halt (350 nA). I/O leakage is specified at ≤50 nA per pin, and reset logic features a programmable voltage detector (PVD) and five selectable BOR thresholds.

Key Specifications

Pinout & Package

LQFP48 package, 7 × 7 mm body, 0.5 mm pitch, exposed pad (no thermal pad connection required), RoHS-compliant. Pin count: 41 user I/Os (all mappable to interrupt vectors), plus power, reset, debug, and oscillator pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052C6T6TR, STM8L051F3P6 sacrifices LCD and RTC features for smaller size and lower cost, while STM32L011K4T6 trades integrated display capability for 32-bit processing headroom and cryptographic extensions - neither offers drop-in replacement due to architectural and peripheral mismatches.

Availability

STM8L052C6T6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical instrumentation, industrial sensor nodes, and asset tracking beacons requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L052C6T6TR 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 Value Line targets cost-sensitive, battery-operated applications demanding ultra-low static and dynamic power - optimized for metering, wearables, and environmental monitoring where longevity and integration outweigh raw compute throughput.

FAQ

What is the maximum operating frequency and core architecture of the STM8L052C6T6TR?

The STM8L052C6T6TR features a Harvard-architecture STM8 core with a 3-stage pipeline, achieving up to 16 MHz clock frequency and 16 CISC MIPS peak performance. It does not use ARM or RISC-V architecture; its instruction set and register model are proprietary to ST's STM8 family, optimized for deterministic low-power execution.

Does the STM8L052C6T6TR support in-circuit debugging and programming?

Yes, it supports non-intrusive on-chip debugging and programming via the Single-Wire Interface Module (SWIM) using one dedicated pin. This allows full flash read/write, breakpoint setting, and real-time variable inspection without halting peripheral operation - unlike traditional JTAG interfaces that require multiple pins and may disrupt timing-critical functions.

How many I/O pins are available, and what low-power capabilities do they offer?

The device provides 41 user-configurable I/O pins, all mappable to external interrupt vectors. Each I/O exhibits ≤50 nA leakage current in standby, supports programmable pull-up/pull-down, and can trigger wake events from all low-power modes including Halt. PA0 additionally supports high-sink LED driver capability (up to 20 mA).

Can the STM8L052C6T6TR drive a segment LCD without external components?

Yes, it integrates a dedicated LCD controller supporting up to 4 commons × 28 segments with an internal step-up converter, eliminating the need for external voltage boosters or bias resistors. The controller supports static, 2-, 3-, and 4-multiplex configurations and operates directly from the main VDD supply, simplifying design for portable meters and handheld instruments.