STMicroelectronics STM32L151VBH6

Overview

STM32L151VBH6 from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller in LQFP100 package, featuring 128 KB Flash, 16 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 and portable industrial data loggers requiring sub-1 µA standby current and <8 µs wake-up.

For engineers reviewing the STM32L151VBH6 datasheet, STM32L151VBH6 pinout, STM32L151VBH6 application, or STM32L151VBH6 equivalent, key selection criteria include verified ultra-low-power mode timing (0.3 µA Standby, 0.57 µA Stop), USB 2.0 full-speed support with internal 48 MHz PLL, and capacitive touch sensing capability for human-interface devices.

Technical Context

The STM32L151VBH6 implements dynamic voltage scaling across five low-power modes (Run, Sleep, Low-power Run, Stop, Standby), with dedicated hardware blocks for RTC backup, 80-byte backup registers, and ultra-low-leakage I/Os (10 nA). Its memory protection unit (MPU) enforces privilege separation between secure and non-secure code regions.

Clock architecture integrates six independent sources: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and a programmable PLL supporting CPU and USB clock domains - enabling precise timing control for mixed-signal sensor fusion and real-time USB data streaming.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VBH6, the STM32L431RCT6 trades EEPROM and ultra-low Stop current for computational headroom, while the EFM32PG12B500F1024GL125 achieves deeper sleep at the cost of USB and DAC integration - making STM32L151VBH6 optimal for USB-connected, analog-rich, battery-constrained edge nodes.

Availability

STM32L151VBH6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, and portable gas detectors requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VBH6 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, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and certified functional safety - with the L151VBH6 optimized for cost-sensitive, mixed-signal IoT endpoints.

FAQ

Does STM32L151VBH6 support USB device mode without external components?

Yes. The STM32L151VBH6 integrates a full-speed USB 2.0 transceiver with internal 48 MHz PLL and pull-up resistors on PA11/PA12. No external PHY, crystal, or termination resistors are required for basic USB device operation - validated per USB-IF compliance testing in ST's reference designs.

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

The internal 16 MHz HSI oscillator is factory-trimmed to ±1% accuracy and supports full CPU operation up to 32 MHz when used with the PLL (HSI/2 → PLL → 32 MHz). Direct HSI use caps at 16 MHz, sufficient for low-power sensor polling and UART communication at 115.2 kbps.

How many I/O pins support 5V tolerance on STM32L151VBH6?

73 of the 83 GPIOs are 5V-tolerant (all except those in the analog domain: PA0–PA7, PB0–PB1, PC0–PC5, PF0–PF1). This enables direct interfacing with legacy 5V logic, industrial sensors, and RS-232 level shifters without external voltage translators.

Is the 4 KB EEPROM truly erase/write-capable during application execution?

Yes. The 4 KB data EEPROM supports byte/word programming and page erasure while the CPU executes from Flash or RAM. Each page (128 bytes) endures ≥400k write/erase cycles with guaranteed 40-year data retention at 85°C - verified per JEDEC JESD22-A117 stress testing.