STMicroelectronics STM8L151R8T3

Overview

STM8L151R8T3 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 three USARTs. 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 and fast wake-up.

For engineers reviewing the STM8L151R8T3 datasheet, STM8L151R8T3 pinout, STM8L151R8T3 application, or STM8L151R8T3 equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), 4.7 µs wake-up time from Halt, 67 GPIOs with interrupt mapping, and integrated capacitive touch sensing (16 channels).

Technical Context

The STM8L151R8T3 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates factory-trimmed 16 MHz RC, 38 kHz low-consumption RC, and support for 32 kHz and 1–16 MHz external crystals with clock security monitoring.

Power management includes five programmable low-power modes, BOR with five thresholds, and ultra-low leakage I/O (50 nA). The analog subsystem combines two rail-to-rail comparators (one with fixed threshold), temperature sensor, internal reference voltage, and dual DACs with output buffers.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin quad flat configuration optimized for industrial and portable designs requiring high I/O count and thermal reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152R8T3, the STM8L151R8T3 removes redundant LCD circuitry-reducing die size, cost, and power in non-display applications. Versus STM32L053R8T6, it retains 8-bit simplicity and integrated analog/touch features critical for cost-sensitive, battery-operated sensor endpoints.

Availability

STM8L151R8T3 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 STM8L151R8T3 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power family targets battery-operated and energy-harvesting applications where µA-level sleep current, fast wake-up, and integrated analog peripherals reduce system complexity and extend operational lifetime.

FAQ

What is the maximum operating frequency and core performance of the STM8L151R8T3?

The STM8L151R8T3 runs at up to 16 MHz using its internal 16 MHz factory-trimmed RC oscillator or external crystal. Its STM8 core delivers 16 CISC MIPS peak performance with a 3-stage pipeline and Harvard architecture, enabling deterministic real-time response in resource-constrained environments.

Does the STM8L151R8T3 support capacitive touch sensing, and how many channels are available?

Yes, the STM8L151R8T3 integrates a hardware-accelerated capacitive sensing controller supporting up to 16 channels. It natively handles touchkey, proximity, linear slider, and rotary touch applications without CPU intervention, reducing active time and power consumption during UI interaction.

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

The lowest power mode is Halt at 400 nA (typical, VDD = 3.0 V, T = 25 °C). Active-halt with full RTC enabled draws 1.4 µA (typical, LSE-driven), and Low-power wait consumes 3 µA (typical). All values are measured under specified conditions per DS6948 Rev 11 Section 9.3.3.

Is the STM8L151R8T3 pin-compatible with other members of the STM8L151x6/8 series?

Yes-within the same package variant (e.g., LQFP64), the STM8L151R8T3 shares identical pinout with STM8L151R6T3 and STM8L152R8T3. Differences lie in Flash size (64 KB vs. 32 KB), peripheral enablement (LCD present/absent), and option byte configuration-not physical connectivity.