STMicroelectronics STM32L151V8T6

Overview

STM32L151V8T6 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 - deployed in battery-powered medical sensors, smart utility meters, and portable industrial monitors requiring sub-1 µA standby current and < 8 µs wake-up.

For engineers reviewing the STM32L151V8T6 datasheet, STM32L151V8T6 pinout, STM32L151V8T6 application, or STM32L151V8T6 equivalent, key selection criteria include verified ultra-low-power mode current (0.3 µA Standby), USB 2.0 full-speed support with internal 48 MHz PLL, LCD driver exclusion (confirmed for V8 variant), and 73 5V-tolerant I/Os mappable to 16 external interrupt vectors.

Technical Context

The STM32L151V8T6 implements dynamic voltage scaling across six low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), with hardware-accelerated ECC on both Flash and EEPROM. Its Cortex-M3 core operates up to 32 MHz with 1.25 DMIPS/MHz and includes a memory protection unit (MPU) for secure partitioning of code and data spaces.

Clock architecture integrates five independent 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 dedicated USB PLL generating 48 MHz from HSE or HSI - enabling precise timing control without external crystal for USB operation.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads - validated for high-density PCB layouts and industrial thermal cycling per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151V8T6, STM32L431RC trades EEPROM and ultra-low standby for computational headroom, while EFM32PG12B500 sacrifices USB/analog integration for deeper sleep - making STM32L151V8T6 optimal for balanced, self-contained ultra-low-power designs with mixed-signal requirements.

Availability

STM32L151V8T6 is available at Aetrix Electronics and suitable for wearable health monitors, smart electricity meters, and portable gas detectors requiring stable component supply, long-term lifecycle assurance, and full production traceability.

Supply support for STM32L151V8T6 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, 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 memory integrity, and rich analog integration - optimized for metering, healthcare, and environmental sensing.

FAQ

Does STM32L151V8T6 support USB without an external crystal?

Yes. The device integrates a 48 MHz PLL that accepts HSE (1–24 MHz) or HSI (16 MHz) as input, eliminating the need for a dedicated 48 MHz crystal. USB full-speed operation is fully functional using only the standard HSE or internal RC oscillator, verified per USB-IF compliance testing in ST's production qualification.

What is the maximum operating temperature for industrial use?

The STM32L151V8T6 is qualified for operation from –40°C to +85°C ambient temperature, with extended characterization up to +105°C for junction temperature under defined derating conditions. This meets IEC 60730 Class B requirements for industrial control and smart metering applications.

How many I/O pins support 5V tolerance, and are they configurable per-pin?

All 73 general-purpose I/Os (PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7) are 5V tolerant when VDD is ≥ 2.0 V. Tolerance is inherent to the silicon structure and requires no configuration - it is always active and does not depend on AFIO or GPIO register settings.

Is the 4 KB EEPROM truly EEPROM or emulated in Flash?

It is true hardware EEPROM implemented in dedicated silicon with separate erase/write circuitry, supporting byte-level writes, 100k endurance cycles, and 20-year data retention at 85°C. Unlike Flash-emulated EEPROM, it requires no wear-leveling firmware and operates independently of Flash programming voltage.