STMicroelectronics STM8L151R8T6TR

Overview

STM8L151R8T6TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, RTC, LCD controller, dual 12-bit DACs, 12-bit ADC (1 Msps, 28 channels), 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.

For engineers reviewing the STM8L151R8T6TR datasheet, STM8L151R8T6TR pinout, STM8L151R8T6TR application, or STM8L151R8T6TR equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), fast wake-up time (4.7 µs), 67 I/Os with interrupt mapping, capacitive touch support (16 channels), and SWIM-based non-intrusive debugging.

Technical Context

The STM8L151R8T6TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual 12-bit DACs with output buffers, a 12-bit ADC supporting up to 28 external channels plus internal temperature sensor and reference voltage, and two ultra-low-power comparators-one with fixed threshold and one rail-to-rail.

Clock management includes dual crystal oscillators (32 kHz LSE and 1–16 MHz HSE), factory-trimmed 16 MHz RC and 38 kHz low-consumption RC, plus clock security system. Reset architecture features programmable BOR with five thresholds, ultra-low-power POR/PDR, and PVD.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 64 pins. Pin functions validated per STMicroelectronics DS6948 Rev 11 Figure 5 (STM8L151R8/R6 64-pin pinout without LCD).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152R8T6TR, the STM8L151R8T6TR omits LCD driving but retains identical low-power performance and analog capabilities; versus STM32L053R8T6, it trades 32-bit compute headroom for tighter integration of touch, RTC, and ultra-low-leakage I/O - making it optimal for cost-sensitive, battery-limited 8-bit sensor endpoints.

Availability

STM8L151R8T6TR 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 STM8L151R8T6TR 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 automotive semiconductors.

The STM8L ultra-low-power 8-bit MCU family targets battery-operated and energy-harvesting applications where sub-microamp sleep current, integrated analog peripherals, and long-term supply stability are critical design requirements.

FAQ

What is the maximum operating frequency and core performance of the STM8L151R8T6TR?

The STM8L151R8T6TR operates at up to 16 MHz with its STM8 core delivering 16 CISC MIPS peak performance. Its Harvard architecture and 3-stage pipeline ensure deterministic instruction execution, making it suitable for real-time control tasks in ultra-low-power environments such as sensor polling and actuator sequencing.

Does the STM8L151R8T6TR support hardware-accelerated capacitive touch sensing?

Yes, it integrates a dedicated capacitive sensing controller supporting up to 16 channels for touchkey, proximity, linear, and rotary touch applications. This hardware block operates independently of the CPU, enabling low-power wake-on-touch functionality and eliminating the need for external touch ICs or complex software algorithms.

What are the key low-power modes and their typical current consumption?

The device offers five low-power modes: Halt (400 nA), Active-halt with full RTC (1.4 µA), Low-power wait (3 µA), Low-power run (5.9 µA), and Wait mode. These are validated at 1.8 V and 25 °C per DS6948 Rev 11 Tables 24–26, enabling design of decade-long battery life in metering and environmental monitoring applications.

Can the STM8L151R8T6TR drive an LCD display directly?

No - the STM8L151R8T6TR excludes the LCD controller present in the STM8L152 series. It supports up to 67 GPIOs and analog peripherals but lacks built-in LCD segment bias generation and multiplexing logic. For LCD-driven applications, the pin-compatible STM8L152R8T6TR is the designated variant.