STMicroelectronics STM8L152C4T3TR

Overview

STM8L152C4T3TR 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 STM8L152C4T3TR datasheet, STM8L152C4T3TR pinout, STM8L152C4T3TR application, or STM8L152C4T3TR equivalent, key selection criteria include ultra-low standby current (1.3 µA in Active-halt with RTC), LCD segment drive capability, on-chip capacitive touch sensing (16 channels), and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L152C4T3TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual clock domains: high-speed (1–16 MHz HSE or 16 MHz factory-trimmed RC) and low-power (32 kHz LSE or 38 kHz RC), enabling precise RTC operation and fast wake-up (4.7 µs from Halt).

Its analog subsystem includes a 12-bit ADC with internal temperature sensor and reference voltage, a rail-to-rail 12-bit DAC with output buffer on PB4–PB6, and two independent comparators-one with fixed threshold and one with programmable hysteresis-both supporting wakeup from all low-power modes.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and layout optimized for mixed-signal routing and low EMI in compact PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C4T3TR, the C6 variant offers scalable Flash for future firmware growth without changing layout, while the STM32L053 trades ultra-low static power and integrated LCD/touch for 32-bit performance and broader toolchain support - making it less optimal for cost-sensitive, display-integrated, coin-cell–powered designs.

Availability

STM8L152C4T3TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, industrial wireless nodes, and home appliance control panels requiring stable component supply and long-term manufacturability.

Supply support for STM8L152C4T3TR 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 instrumentation, smart meters, and wearable health devices, emphasizing sub-µA sleep modes, integrated analog peripherals, and robust development tools.

FAQ

What is the minimum operating voltage for STM8L152C4T3TR in Halt mode?

The device operates down to 1.65 V in all low-power modes, including Halt. At 1.65 V, Halt current remains ≤350 nA with full RAM retention and register state preserved. This enables reliable operation with aging alkaline or lithium primary cells whose voltage declines over time.

Does STM8L152C4T3TR support capacitive touch sensing without external components?

Yes - it integrates a dedicated Capacitive Sensing GPIO (CSG) peripheral with hardware-accelerated measurement, automatic calibration, and noise filtering. All 16 channels operate using only internal resources; no external RC networks or op-amps are required for basic touchkey or proximity sensing.

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

The DAC output buffer supports rail-to-rail operation and can source/sink up to ±5 mA per channel (PB4/PB5/PB6). It drives resistive loads (e.g., sensor bias, LED dimming) directly but requires external op-amp buffering for low-impedance or high-precision analog outputs like audio or actuator control.

Is SWIM debugging supported in all power modes?

SWIM is active in Run, Wait, and Low Power Run modes. It is disabled in Low Power Wait, Active-halt, and Halt modes to preserve ultra-low current. Debug access resumes immediately upon wake-up, allowing breakpoint insertion and register inspection without resetting the device.