STMicroelectronics STM32L152R6T6A

Overview

STM32L152R6T6A from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 32 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable instrumentation, and industrial IoT edge nodes requiring sub-µA standby operation.

For engineers reviewing the STM32L152R6T6A datasheet, STM32L152R6T6A pinout, STM32L152R6T6A application, or STM32L152R6T6A equivalent, key selection criteria include verified ultra-low-power mode current (0.28 µA Standby), LCD driver support (8×40 segments), USB 2.0 full-speed interface with internal 48 MHz PLL, and 73 5V-tolerant I/Os with capacitive touch sensing capability.

Technical Context

The STM32L152R6T6A integrates a Cortex-M3 core operating up to 32 MHz with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) managed by an ultra-safe BOR and programmable PVD. Its clock system combines HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz) sources plus a USB-capable PLL.

Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, VREFINT reference, and dedicated LCD controller supporting contrast adjustment and on-board step-up converter - exclusive to STM32L152 variants (not present in L151).

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad - optimized for compact PCB layouts and thermal management in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.

Compared with STM32L152R6T6A, the R8T6A offers identical functionality at potentially higher volume pricing, while the L432KCU6 trades LCD/ECC EEPROM for FPU and larger memory - making it suitable only when display integration is offloaded and computational load justifies architectural upgrade.

Availability

STM32L152R6T6A is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial wireless nodes, and low-power HMI displays requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L152R6T6A 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, specializing in microcontrollers, power management, sensors, and automotive ICs - serving industrial, automotive, and consumer markets with scalable, certified platforms.

The STM32L15x ultra-low-power MCU product line targets battery-operated and energy-harvesting applications demanding sub-µA standby, integrated analog peripherals, and robust memory integrity - with design emphasis on longevity, security, and mixed-signal integration.

FAQ

Does STM32L152R6T6A include an integrated LCD controller?

Yes. The STM32L152R6T6A includes a dedicated LCD controller supporting up to 8 commons and 40 segments, with on-chip step-up converter, contrast adjustment, and blinking mode - a feature exclusive to STM32L152 (not present in L151 variants). This eliminates external bias circuitry and reduces BOM count.

What is the maximum operating temperature range for STM32L152R6T6A?

The STM32L152R6T6A is rated for operation from –40°C to +105°C ambient temperature, validated per ST's production data sheet (DocID024330 Rev 5). This extended range supports deployment in industrial enclosures, automotive under-hood environments, and outdoor utility infrastructure.

Is the 4 KB EEPROM truly erasable at byte level and ECC-protected?

Yes. The 4 KB data EEPROM is implemented as true EEPROM (not emulated in Flash), supporting byte/word erase and write operations with guaranteed 100,000 write/erase cycles and 20-year data retention. Each write includes hardware ECC for single-bit correction and double-bit detection per 64-bit word.

Can STM32L152R6T6A operate from a 1.8 V supply for analog peripherals?

Yes. The analog peripherals (ADC, DAC, comparators, VREFINT) are fully functional down to 1.8 V VDDA, as confirmed in Section 6.3.1 of the datasheet. Digital logic operates from 1.65–3.6 V, enabling mixed-voltage system designs where analog sections run at minimum voltage to reduce power.