STMicroelectronics STM8L151R8T6

Overview

STM8L151R8T6 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 - deployed in battery-powered utility meters and portable medical sensors requiring sub-µA sleep current and fast wake-up.

For engineers reviewing the STM8L151R8T6 datasheet, STM8L151R8T6 pinout, STM8L151R8T6 application, or STM8L151R8T6 equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), Halt-mode leakage (400 nA), 67 I/O count with interrupt mapping, and LQFP64 package compatibility for space-constrained industrial sensing designs.

Technical Context

The STM8L151R8T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates dual crystal oscillators (32 kHz LSE + 1–16 MHz HSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC with clock security monitoring.

Power management includes five programmable low-power 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 enabled by BOR with five voltage thresholds, POR/PDR, and PVD.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in sealed industrial enclosures and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L151R8T6, STM8L152R8T6 adds LCD drive capability at no cost to core performance, while STM32L053R8T6 trades deterministic 8-bit efficiency for 32-bit flexibility-making the STM8L151R8T6 optimal for cost-sensitive, battery-limited sensing nodes where code size and µA/MHz matter most.

Availability

STM8L151R8T6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, and industrial temperature monitoring systems requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151R8T6 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 management ICs, and MEMS sensors for industrial, automotive, and consumer markets.

The STM8L ultra-low-power family targets battery-operated applications demanding sub-microamp sleep currents, robust RTC functionality, and integrated analog peripherals - enabling multi-year operation in remote sensing and metering devices.

FAQ

What is the maximum operating frequency and core architecture of the STM8L151R8T6?

The STM8L151R8T6 operates at up to 16 MHz using an 8-bit STM8 Harvard architecture core with a 3-stage pipeline, delivering 16 CISC MIPS peak performance. It supports deterministic interrupt latency and executes instructions in one or two cycles, making it suitable for real-time sensor control without cache complexity.

Does the STM8L151R8T6 support hardware-accelerated capacitive sensing?

Yes - it integrates a dedicated Capacitive Sensing Controller (CAPSENSE) supporting up to 16 channels for touchkey, proximity, linear, and rotary touch applications. No external components are required, and sensing operates concurrently with other peripherals in low-power modes.

What are the key differences between the STM8L151R8T6 and STM8L152R8T6?

The STM8L152R8T6 adds an integrated LCD controller supporting 8×40 or 4×44 segments with built-in step-up converter, while retaining identical Flash, RAM, ADC, DAC, timers, and low-power specs. The STM8L151R8T6 omits LCD hardware, reducing static current and die size for non-display applications.

Can the STM8L151R8T6 operate reliably at 1.65 V supply voltage?

Yes - it supports 1.65–3.6 V operation without Brown-Out Reset (BOR); with BOR enabled, the minimum is 1.8 V. At 1.65 V, all peripherals including 12-bit ADC, DAC, and RTC remain fully functional, and Halt mode current stays at 400 nA, validated per DS6948 Rev 11 electrical characteristics tables.