STMicroelectronics STM32L152VBH6

Overview

STM32L152VBH6 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 (8×40 segments), and USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40°C to +85°C, delivers 214 µA/MHz in Run mode, and supports <8 µs wakeup from Stop mode - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L152VBH6 datasheet, STM32L152VBH6 pinout, STM32L152VBH6 application, or STM32L152VBH6 equivalent, key selection criteria include ultra-low standby current (0.3 µA), dual 12-bit DACs with output buffers, 24-channel 1 Msps ADC, LCD driver with on-board step-up converter, and USB 2.0 compliance without external PHY.

Technical Context

The STM32L152VBH6 implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) managed by an integrated ultra-low-power BOR with five threshold levels and programmable voltage detector (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), feeding a PLL for CPU and USB clocks up to 32 MHz and 48 MHz respectively.

Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, internal VREFINT, and dedicated low-voltage analog domain supporting operation down to 1.8 V. The LCD controller is exclusive to STM32L152xx variants and supports contrast adjustment and blinking mode.

Key Specifications

Pinout & Package

STM32L152VBH6 uses a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with 83 fast I/Os (73 tolerant to 5 V), all mappable to 16 external interrupt vectors. Power supply pins include VDD/VSS (digital), VDDA/VSSA (analog), VREF+, VREF–, and VLCD for LCD bias.

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 STM32L152VBH6, STM32L072KBU6 trades LCD and dual DAC for lower static current and smaller footprint, while STM32L432KCU6 upgrades CPU and memory but removes integrated display support - making STM32L152VBH6 uniquely balanced for display-equipped, battery-constrained embedded systems.

Availability

STM32L152VBH6 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial data loggers, and capacitive touch remotes requiring stable component supply and long-term production continuity.

Supply support for STM32L152VBH6 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and certified functional safety - optimized for wearable health monitors, smart meters, and IoT edge nodes.

FAQ

Does STM32L152VBH6 support USB without an external crystal?

Yes. The device integrates a 48 MHz PLL fed by its internal 16 MHz HSI oscillator, enabling full-speed USB 2.0 operation without requiring an external 48 MHz crystal or oscillator. This reduces BOM cost and board space while maintaining USB compliance under temperature and voltage variation.

What is the maximum operating frequency when running from internal RC oscillators?

The STM32L152VBH6 achieves up to 32 MHz CPU frequency using the HSI oscillator (16 MHz ±1%) combined with its PLL. The MSI oscillator supports frequencies from 65 kHz to 4.2 MHz and is used for low-power clock domains, but not for full-speed CPU operation.

How does the integrated LCD controller reduce system cost?

The LCD controller provides on-chip step-up conversion (up to 5.5 V), contrast adjustment, blinking mode, and 8×40 segment drive - eliminating external components like charge pumps, resistive dividers, and discrete drivers. This cuts BOM cost by ~$0.35 and saves ~12 mm² PCB area in typical portable designs.

Can the 4 KB EEPROM be used for storing calibration coefficients across power cycles?

Yes. The 4 KB true EEPROM supports 100,000 write/erase cycles and 20-year data retention at 85°C. It includes built-in ECC for bit-error correction, making it suitable for storing factory-calibrated sensor offsets, user preferences, and cryptographic keys without external nonvolatile memory.