STMicroelectronics STM32L152VBT6A

Overview

STM32L152VBT6A 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, integrated 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-µA standby operation.

For engineers reviewing the STM32L152VBT6A datasheet, STM32L152VBT6A pinout, STM32L152VBT6A application, or STM32L152VBT6A equivalent, key selection criteria include verified ultra-low-power mode current (0.28 µA Standby), LCD controller support (8×40 segments), USB 2.0 FS interface with internal 48 MHz PLL, and 73 5V-tolerant I/Os with 16 external interrupt vectors.

Technical Context

The device implements a dual-voltage domain architecture with VDD/VDDA (1.65–3.6 V) and VLCD (1.2–3.3 V) rails, enabling independent LCD bias control and analog precision down to 1.8 V supply. Its power management unit supports six low-power modes - including Stop mode with RTC (1.38 µA) and Standby with 3 wakeup pins (0.28 µA) - managed via programmable voltage detector (PVD) and ultra-low-power BOR with five thresholds.

Clock system integration includes three internal oscillators (HSI 16 MHz ±1%, LSI 37 kHz, MSI 65 kHz–4.2 MHz), dual external crystal support (1–24 MHz HSE, 32.768 kHz LSE), and a dedicated USB PLL generating 48 MHz from HSE or MSI - all coordinated by RCC with automatic clock switching and fail-safe monitoring.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad - optimized for thermal dissipation in sealed 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 MCU applications.

Compared with STM32L152VBT6A, STM32L432KCU6 trades EEPROM and ultra-low standby for FPU-enhanced compute; EFM32PG12B500F1024GL125 achieves lower deep-sleep current but sacrifices USB, LCD, and EEPROM - making STM32L152VBT6A optimal for integrated, display-equipped, battery-powered systems needing long-term data retention.

Availability

STM32L152VBT6A is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial data loggers, and low-power human-machine interfaces requiring stable component supply across extended product lifecycles.

Supply support for STM32L152VBT6A 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 since 1987.

The STM32L1 series targets ultra-low-power embedded applications - emphasizing energy efficiency, integrated peripherals (LCD, EEPROM, capacitive sensing), and extended temperature operation (-40°C to +105°C) for battery-operated and industrial environments.

FAQ

Does STM32L152VBT6A support USB without an external crystal?

Yes. The device integrates a USB-specific PLL that generates the required 48 MHz clock from either the internal MSI oscillator (65 kHz–4.2 MHz) or the external HSE (1–24 MHz), eliminating the need for a separate 48 MHz crystal. This reduces BOM cost and PCB layout complexity in portable USB devices.

What is the maximum number of capacitive sensing channels supported?

The STM32L152VBT6A supports up to 20 capacitive sensing channels via its integrated Capacitive Sensing GPIO (CSG) peripheral. It natively handles touchkey, linear, and rotary sensor configurations with hardware-accelerated scanning and noise immunity features - no external controller needed.

How does the 4 KB EEPROM differ from standard Flash memory in practice?

This is true EEPROM - byte-erasable, with built-in ECC, 100k write/erase endurance, and guaranteed data retention for 20 years at 85°C. Unlike Flash, it allows single-byte writes without erasing full pages, enabling efficient parameter storage and field-updatable configuration tables without wear-leveling overhead.

Is the LCD controller compatible with common 8×40 segment displays?

Yes. The integrated LCD controller supports up to 8 commons and 40 segments (320 segments total) with programmable bias, contrast adjustment, blinking mode, and on-board step-up converter - directly driving standard static or multiplexed segment LCDs used in utility meters and portable instruments without external drivers.