STMicroelectronics STM32L151V8H6

Overview

STM32L151V8H6 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 1.65–3.6 V, achieves 0.57 µA Stop mode current, and supports USB 2.0, three USARTs, two SPIs, and two I²Cs - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L151V8H6 datasheet, STM32L151V8H6 pinout, STM32L151V8H6 application, or STM32L151V8H6 equivalent, key selection criteria include ultra-low standby current (0.3 µA), integrated EEPROM endurance (100k cycles), LCD driver exclusion (per device variant), USB 48 MHz PLL accuracy, and 73 5V-tolerant I/Os with 16 interrupt vectors.

Technical Context

The STM32L151V8H6 implements dynamic voltage scaling across six low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), with hardware-assisted wake-up from Stop mode in under 8 µs using 16 configurable lines. Its memory protection unit (MPU) enforces privilege-level access to Flash, SRAM, and peripherals.

Clock architecture integrates five sources: HSE (1–24 MHz), LSE (32.768 kHz RTC-calibrated), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a USB-dedicated PLL generating precise 48 MHz. The 12-bit ADC supports oversampling and hardware-accelerated calibration; DACs include output buffers and noise suppression circuitry.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 pins; RoHS-compliant, moisture sensitivity level 3.

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 STM32L151V8H6, the STM32L071KBT6 trades EEPROM, dual DAC, and USB for lower cost and simpler toolchain support, while the STM32L431RCT6 upgrades compute performance and memory at the expense of ultra-low-power analog integration and EEPROM persistence.

Availability

STM32L151V8H6 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 STM32L151V8H6 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 automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and secure firmware execution - optimized for medical, metering, and portable industrial equipment.

FAQ

Does STM32L151V8H6 include an integrated LCD controller?

No. The STM32L151V8H6 excludes the LCD controller present in STM32L152xx variants. This is explicitly stated in the datasheet's "Device overview" section and Table 2 (feature comparison), where LCD functionality is marked "Not available" for STM32L151x6/8/B devices. Hardware resources for LCD driving are omitted from this part number's silicon.

What is the maximum allowed HSE crystal frequency for STM32L151V8H6?

The HSE oscillator supports external crystals from 1 MHz to 24 MHz, as confirmed in Section 3.4 ("Clock management") and Table 26 ("High-speed external user clock characteristics"). Operation beyond 24 MHz violates absolute maximum ratings and may cause PLL lock failure or system instability.

How many 5V-tolerant I/Os does STM32L151V8H6 have?

It has 73 5V-tolerant I/Os, per Section 2.1 ("Device overview") and Table 2. These are distributed across GPIO ports A, B, C, D, and E, enabling direct interface with 5V peripherals without external level shifters - a key design advantage for mixed-voltage systems.

Is the 4 KB EEPROM truly erasable and writable in-circuit?

Yes. The 4 KB of true EEPROM supports byte/word erase and write operations in-application, with 100,000 endurance cycles and 40-year data retention at 85°C, as specified in Table 35 and Table 36. It uses dedicated hardware controllers and ECC, eliminating need for software wear-leveling.