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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersSTM32L151V8H6
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STM32L151V8H6 - STMicroelectronics

Manufacturer Part Number
STM32L151V8H6
Manufacturer
STMicroelectronics
Allelco Part Number
32D-STM32L151V8H6
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,426 pcs available, New & Original
Parts Description
IC MCU 32BIT 64KB FLASH 100LQFP
Package
100-LQFP (14x14)
Data sheet
STM32L151V8H6.pdf

HTML Datasheet

STM32L15xx(6, 8, B).pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf

PCN Assembly/Origin

STM32L1x 17/Nov/2022.pdf
RoHs Status
ROHS3 Compliant
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In stock: 9426

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Specifications

STM32L151V8H6 Tech Specifications
STMicroelectronics - STM32L151V8H6 technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32L151V8H6

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Supply (Vcc/Vdd) 1.8V ~ 3.6V
Supplier Device Package 100-LQFP (14x14)
Speed 32MHz
Series STM32L1
RAM Size 10K x 8
Program Memory Type FLASH
Program Memory Size 64KB (64K x 8)
Peripherals Brown-out Detect/Reset, Cap Sense, DMA, I²S, POR, PWM, WDT
Package / Case 100-LQFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 83
Mounting Type Surface Mount
EEPROM Size 4K x 8
Data Converters A/D 24x12b; D/A 2x12b
Core Size 32-Bit Single-Core
Core Processor ARM® Cortex®-M3
Connectivity I²C, IrDA, LINbus, SPI, UART/USART, USB
Base Product Number STM32L151

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991A2
HTSUS 8542.31.0001

Parts Introduction

STM32L151V8H6 Image
STM32L151V8H6 (1)

Manufacturer Part Number

STM32L151V8H6

Manufacturer

STMicroelectronics

Introduction

The STM32L151V8H6 is a low-power ARM Cortex-M3 32-bit microcontroller suitable for a wide range of applications, particularly those focusing on battery life and energy efficiency.

Product Features and Performance

ARM Cortex-M3 core processor

32-bit single-core architecture

32MHz operating speed

Advanced connectivity: I2C, IrDA, LINbus, SPI, UART/USART, USB

Intuitive peripherals: Brown-out Detect/Reset, Capacitive Sensing, DMA, I2S, Power-on Reset, PWM, Watchdog Timer

Generous I/O count: 83 I/O ports

64KB Flash memory for program storage

4KB EEPROM for data storage

10KB RAM for operational use

Extended operating temperature range of -40°C to 85°C

Product Advantages

High integration of features reduces part count and design complexity

Low-power consumption extends battery life for portable devices

Flexible power supply range (1.8V ~ 3.6V)

Robust peripheral set enables diverse application use

Large set of development tools and software available

Key Technical Parameters

Core Size: 32-Bit

Connectivity: I2C, IrDA, LINbus, SPI, UART/USART, USB

Peripherals: Brown-out Reset, Cap Sense, DMA, I2S, POR, PWM, WDT

Number of I/O: 83

Program Memory Size: 64KB

EEPROM Size: 4KB

RAM Size: 10KB

Voltage Supply: 1.8V ~ 3.6V

Data Converters: A/D 24x12b, D/A 2x12b

Oscillator: Internal

Quality and Safety Features

Designed to operate within a wide range of temperatures (-40°C to 85°C)

Brown-out detect and reset for increased system reliability

Watchdog Timer to ensure the system recovers from fault states

Compatibility

Compatible with a variety of development environments and software libraries

Support for an extensive ecosystem of tools and software

Application Areas

Medical devices

Industrial control systems

Consumer electronics

Internet of Things (IoT) devices

Product Lifecycle

Active product status, not nearing discontinuation

Supported by STM32 comprehensive ecosystem for smooth product evolution and updates

Reasons to Choose This Product

Low power consumption suitable for battery-powered and energy-sensitive designs

Comprehensive set of peripherals enables versatile applications

Strong support and resources from STMicroelectronics

Reliable operation in extreme temperature conditions

Large memory and numerous I/Os support complex and demanding applications

Frequently Asked Questions(FAQ)

How does the STM32L151V8H6 compare to other STM32L1 series microcontrollers in terms of memory footprint and power consumption for battery-operated embedded applications?
The STM32L151V8H6 offers a balanced configuration with 64KB of Flash memory and 10KB of RAM, making it suitable for moderately complex firmware without exceeding typical L1 series constraints. When compared to lower-density variants like the STM32L151C6 (32KB Flash), it supports larger applications while maintaining the same ultra-low-power architecture. Its operation across a supply range of 1.8V to 3.6V allows compatibility with standard lithium batteries, and its deep-sleep modes achieve sub-µA current draw, aligning well with energy harvesting or long-life sensor node designs where the 64KB program size enables advanced protocol stacks without sacrificing power efficiency.
What are the key considerations when selecting the STM32L151V8H6 for USB-based peripheral implementations requiring real-time communication?
The STM32L151V8H6 includes native USB 2.0 Full-Speed support, which is essential for device-class peripherals such as HID, CDC, or mass storage. However, designers must ensure proper clocking: the internal 16MHz RC oscillator can be used with an external 1.5MHz crystal, but for full-speed USB, the PLL must derive from an external 8MHz crystal, introducing layout sensitivity and cost trade-offs. Additionally, the 64KB Flash imposes limits on USB stack complexity; firmware must be optimized, especially if implementing dual-role functionality or extensive endpoint handling, to avoid memory fragmentation or buffer overflows during high-bandwidth transfers.
In what scenarios would the STM32L151V8H6 be preferable over a higher-performance Cortex-M4 based MCU despite its 32MHz clock speed?
Despite lacking hardware floating-point support, the STM32L151V8H6 excels in ultra-low-power environments where dynamic current consumption dominates system design. Applications such as wireless sensor nodes using BLE co-processors, environmental monitoring stations, or portable medical devices benefit from its deep sleep currents below 1µA and flexible voltage scaling. The M3 core provides sufficient performance for fixed-point signal processing in 12-bit ADC-driven systems, and its rich analog peripherals—including 24-channel 12-bit ADCs and two 12-bit DACs—are well-suited for precision measurement tasks where power budget trumps raw throughput.
How does the STM32L151V8H6 handle capacitive sensing integration, and what design factors should be considered for reliable touch interface implementation?
The STM32L151V8H6 features a Capacitive Touch Sensing (CTS) module that enables gesture recognition and button simulation without external components. This module operates by measuring charge transfer time on GPIO pins configured as electrodes, supporting up to 16 channels. Designers must account for PCB trace capacitance, guard rings, and noise immunity—especially in noisy industrial settings—since false triggers can occur near motors or switching power supplies. Firmware calibration routines are essential due to environmental drift, and the limited RAM (10KB) restricts complex filtering algorithms, necessitating efficient code structures to maintain responsiveness.
Can the STM32L151V8H6 reliably operate in automotive environments, and what modifications are needed beyond temperature rating compliance?
While the STM32L151V8H6 specifies operation down to -40°C and up to 85°C, this covers industrial rather than automotive grade (-40°C to +125°C). For true automotive use, additional validation including EMC testing, latch-up immunity, and functional safety diagnostics would be required. Moreover, the absence of built-in safety features such as memory ECC or watchdog cascading limits suitability for ISO 26262 applications. Therefore, it may be acceptable in non-critical subsystems but not recommended for ASIL-rated functions without external mitigation strategies.
What is the impact of using internal versus external oscillators with the STM32L151V8H6, particularly regarding USB functionality and timing accuracy?
The STM32L151V8H6 relies on internal 16MHz and 128kHz oscillators for low-power modes, but USB Full-Speed requires precise 48MHz clocking. Only an external 8MHz crystal combined with the PLL achieves this, adding board space and cost. Internal RC oscillators exhibit ±2% frequency tolerance, which exceeds USB timing requirements unless calibrated via factory trimming—but even then, long-term drift can affect communication reliability over extended operation. Thus, most USB designs opt for stable external crystals, increasing bill-of-materials complexity compared to non-USB configurations.
How does the I/O count of 83 pins in the STM32L151V8H6 influence thermal dissipation and PCB layout density?
The 100-pin LQFP package accommodates 83 general-purpose I/Os, enabling rich connectivity for moderate-complexity systems. However, high pin-count designs generate more heat under load, especially during simultaneous ADC sampling, PWM generation, and SPI/UART traffic. Thermal vias under the package aid heat spreading, but dense routing increases risk of coupling noise into analog sections like the ADC reference lines. Careful layer stackup and grounding are necessary to prevent crosstalk between digital and analog domains, particularly since the ADC shares pins with multiple peripherals and lacks dedicated shielding.
What are the limitations of the 4K x 8 EEPROM emulation in the STM32L151V8H6 when storing configuration data across power cycles?
The STM32L151V8H6 does not include physical EEPROM; instead, it emulates 4KB of user-accessible storage within Flash using wear-leveling algorithms. Each erase/write cycle consumes Flash endurance—typically 10k cycles per sector. Frequent writes (e.g., logging every second) will degrade memory quickly, limiting lifespan to weeks or months depending on usage patterns. For persistent configuration data, batching updates or using RAM-backed storage with battery-backed backup registers is advisable. Additionally, Flash access requires alignment and cannot be executed in-place during write operations, complicating real-time systems.
How does the STM32L151V8H6’s brown-out reset (BOR) threshold interact with its voltage supply range, and what risks arise during brownout events?
The BOR monitors VDD and triggers reset at programmable thresholds (typically 2.0V, 2.2V, 2.4V, 2.7V, or 3.0V), depending on firmware selection. During brownout conditions below the threshold, the MCU resets, preventing corrupted states. However, if the application draws excessive current leading to dips below the BOR window, the device may enter unpredictable behavior before reset occurs. Designers must ensure adequate decoupling capacitance and trace impedance to minimize voltage sag during transient loads, especially when driving LEDs, motors, or high-speed communication lines simultaneously.
Is it feasible to run multiple communication interfaces concurrently on the STM32L151V8H6 without compromising performance or introducing bus contention?
Yes, the STM32L151V8H6 supports concurrent operation of I2C, SPI, UART/USART, LINbus, IrDA, and USB interfaces through DMA channels and peripheral multiplexing. However, shared resources like the APB buses limit total bandwidth; for example, running both USB and high-speed SPI simultaneously may saturate the interconnect fabric, causing latency spikes. Proper peripheral clock gating and DMA prioritization are essential. Also, interrupt overhead from multiple active peripherals can fragment CPU time unless carefully managed via NVIC configuration and efficient ISRs, particularly given the modest 32KB Flash and 10KB RAM constraints.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32L151V8H6

Product Attribute STM32L151V8H6A STM32L151VBH6TR STM32L151V8T6A STM32L151VBH6
Part Number STM32L151V8H6A STM32L151VBH6TR STM32L151V8T6A STM32L151VBH6
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Peripherals - - - -
Core Processor - - - -
Program Memory Size - - - -
EEPROM Size - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -
Voltage - Supply (Vcc/Vdd) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Speed - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Oscillator Type - - - -
Program Memory Type - - - -
Connectivity - - - -
Core Size - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Data Converters - - - -
RAM Size - - - -
Number of I/O - - - -

STM32L151V8H6 Datasheet PDF

Download STM32L151V8H6 pdf datasheets and STMicroelectronics documentation for STM32L151V8H6 - STMicroelectronics.

HTML Datasheet
STM32L15xx(6, 8, B).pdf
PCN Packaging
Material Barrier Bag 17/Dec/2020.pdf STM32yy Strip Conversion 26/Feb/2020.pdf
PCN Design/Specification
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
STM32L1x 17/Nov/2022.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Note:
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STM32L151V8H6 Image

STM32L151V8H6

STMicroelectronics
32D-STM32L151V8H6

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