STMicroelectronics STM32L152R8T6TR

Overview

STM32L152R8T6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 16 KB SRAM, 4 KB EEPROM with ECC, integrated LCD controller (up to 8×40 segments), and USB 2.0 interface. It operates from 1.65–3.6 V, achieves 214 µA/MHz active current, and supports -40°C to +85°C industrial temperature range - deployed in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the STM32L152R8T6TR datasheet, STM32L152R8T6TR pinout, STM32L152R8T6TR application, or STM32L152R8T6TR equivalent, key selection criteria include ultra-low-power Stop mode (0.57 µA), dual 12-bit DACs with output buffers, 12-bit ADC with 24 channels and 1 Msps sampling, and hardware LCD driver with on-board step-up converter - all critical for energy-constrained embedded control.

Technical Context

The STM32L152R8T6TR implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) managed by an ultra-safe BOR with five threshold levels and programmable voltage detector (PVD). Its clock system integrates a 32 kHz RTC oscillator with calibration, 16 MHz HSI RC (±1%), and PLL supporting 48 MHz USB timing.

Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, internal VREFINT, and dedicated LCD controller with contrast adjustment and blinking support - enabling direct drive of segmented displays without external components.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with 51 I/O pins (73 total I/Os mappable across 16 EXTI lines; 73 I/Os are 5V-tolerant but only 51 available in LQFP64 variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152R8T6TR, STM32L432KCU6 trades LCD/ECC-EEPROM for higher compute throughput and deeper sleep, while STM32L072RBT6 reduces feature set and analog capability to minimize cost - making the L152 optimal for display-integrated, battery-critical applications requiring robust non-volatile storage and precision analog I/O.

Availability

STM32L152R8T6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial wireless nodes, and low-power HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32L152R8T6TR 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, MEMS, and automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust memory reliability - especially in portable instrumentation, energy metering, and wearables.

FAQ

Does STM32L152R8T6TR support USB device functionality without external components?

Yes. The part integrates a full-speed USB 2.0 device interface with an internal 48 MHz PLL, requiring only a USB connector and standard termination resistors. No external PHY or clock crystal is needed - the internal PLL locks to the 32.768 kHz LSE or HSE to generate precise USB timing.

What is the maximum number of capacitive sensing channels supported?

The STM32L152R8T6TR supports up to 20 capacitive sensing channels via its built-in touch sensing controller (TSC), enabling implementation of touchkeys, linear sliders, and rotary wheels without external ICs or additional GPIOs.

How does the 4 KB EEPROM differ from standard Flash-based emulated EEPROM?

This is true hardware EEPROM with dedicated silicon cells, supporting byte-level writes, 100k write/erase cycles, and 20-year data retention at 85°C - unlike Flash-emulated EEPROM, it requires no wear-leveling firmware and operates independently of Flash programming voltage.

Is the LCD controller compatible with common segment-based displays used in utility meters?

Yes. The integrated LCD controller supports static, 2-, 3-, and 4-mux configurations up to 8 commons × 40 segments, matching standard segment layouts in gas/electricity meters. It includes software-controllable contrast, blinking, and charge pump output - eliminating need for external LCD bias ICs.