STMicroelectronics STM32L151VBH6TR

Overview

STM32L151VBH6TR 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, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs. It operates from 1.65 V to 3.6 V across -40°C to +85°C and targets battery-powered IoT sensors and portable medical devices requiring sub-µA standby current (0.3 µA) and fast wakeup (< 8 µs).

For engineers reviewing the STM32L151VBH6TR datasheet, STM32L151VBH6TR pinout, STM32L151VBH6TR application, or STM32L151VBH6TR equivalent, key selection criteria include ultra-low-power mode timing (Stop/Standby currents), integrated analog precision (ADC/DAC specs), USB 2.0 full-speed support with internal 48 MHz PLL, and capacitive touch sensing capability for human-interface designs.

Technical Context

The STM32L151VBH6TR implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with hardware-assisted state retention. Its Cortex-M3 core runs up to 32 MHz with 1.25 DMIPS/MHz performance and includes a memory protection unit (MPU) for secure firmware partitioning.

Analog subsystem integration includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, internal voltage reference (VREFINT), and LCD driver circuitry (excluded in L151x/B variants per datasheet Table 1). Clock architecture supports HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and USB-dedicated PLL.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads. Pin functions validated per STMicroelectronics DocID17659 Rev 12, Section 4 "Pin descriptions" and Table 8 "STM32L151x6/8/B and STM32L152x6/8/B pin definitions".

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VBH6TR, the STM32L431RCT6 trades EEPROM and ultra-low standby for higher compute density and FPU support, while the EFM32PG12B500F1024GL125 achieves deeper sleep at the cost of USB integration and analog feature set completeness.

Availability

STM32L151VBH6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L151VBH6TR 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 demanding multi-year battery life, robust analog integration, and secure firmware execution - optimized for IoT edge nodes, portable medical tools, and energy-conscious industrial controls.

FAQ

Does STM32L151VBH6TR support USB device mode without external crystal?

Yes. The part integrates a 48 MHz PLL fed by its internal 16 MHz HSI RC oscillator, enabling full-speed USB 2.0 device operation without an external high-frequency crystal. This reduces BOM cost and PCB footprint while maintaining USB compliance per ST's AN4251 application note.

What is the maximum operating temperature for STM32L151VBH6TR?

The STM32L151VBH6TR is rated for industrial temperature range: –40°C to +85°C. It does not support the extended +105°C grade offered in some STM32L152 variants, as confirmed in Table 1 of the official datasheet (DocID17659 Rev 12, page 1).

How many I/O pins are 5V tolerant on this device?

73 of the 83 GPIOs are 5V tolerant, as explicitly stated in the "Features" section of the datasheet. This applies to all pins except those dedicated to USB (PA11/PA12), oscillator inputs (PC14/PC15), and BOOT0 - enabling direct interfacing with legacy 5V logic without level shifters.

Is the LCD controller functional in STM32L151VBH6TR?

No. Per the device summary (Table 1) and Section 2.1 "Device overview", the LCD driver is excluded in all STM32L151x6/8/B variants, including STM32L151VBH6TR. Only STM32L152xx parts include the LCD controller supporting up to 8×40 segments.