STMicroelectronics STM32L151VEY6TR

Overview

STM32L151VEY6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, USB 2.0 interface, and 12-bit ADC (1 Msps, up to 40 channels). It operates from 1.65 V to 3.6 V across -40 °C to +105 °C and delivers 195 µA/MHz in Run mode - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L151VEY6TR datasheet, STM32L151VEY6TR pinout, STM32L151VEY6TR application, or STM32L151VEY6TR equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 I/Os (5V tolerant), dual 12-bit DACs, and integrated operational amplifiers for sensor signal conditioning.

Technical Context

The device implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with hardware-accelerated power state transitions. Its memory subsystem includes two independent 256 KB Flash banks enabling Read-While-Write (RWW) capability and ECC protection for both Flash and EEPROM.

Clock architecture integrates six oscillators: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and a dedicated 48 MHz PLL for USB timing - all managed via the RCC peripheral with automatic clock source failover and calibration support.

Key Specifications

Pinout & Package

LQFP100 package with 100 leads, 0.5 mm pitch, 14 × 14 mm body, and exposed thermal pad (EPAD) for enhanced thermal dissipation in continuous operation.

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 STM32L152VEY6TR, this part removes LCD driver circuitry to reduce die size and cost while retaining identical ultra-low-power analog and timing features; versus STM32L431RCT6, it prioritizes EEPROM endurance and low-leakage standby over CPU speed and DSP capability.

Availability

STM32L151VEY6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, and industrial wireless sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VEY6TR 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 sensors for industrial, automotive, and consumer markets.

This device belongs to the STM32L1 ultra-low-power MCU product line, engineered specifically for energy-constrained applications demanding multi-year battery life, robust analog integration, and secure firmware execution in harsh environments.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32L151VEY6TR achieves a maximum CPU frequency of 32 MHz. At this speed, typical current consumption is 195 µA/MHz when executing code from Flash memory, resulting in approximately 6.24 mA total - verified per Table 17 in DS10002 Rev 10 under VDD = 3.3 V and Tj = 25 °C conditions.

Does this MCU support hardware encryption or secure boot features?

No, the STM32L151VEY6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-implemented algorithms and external secure elements; however, its 96-bit unique ID and write-protected option bytes provide foundational device identity and configuration lockdown capabilities.

Can the 16 KB EEPROM be used for storing calibration data across power cycles?

Yes - the 16 KB true EEPROM supports byte-level erase/write operations with 100,000 endurance cycles and 20-year data retention at 55 °C (per Table 36). It includes built-in ECC and is accessible via standard HAL drivers, making it ideal for storing sensor calibration coefficients, device-specific tuning parameters, and usage logs.

Is the USB interface compatible with USB Battery Charging (BC) 1.2 specification?

No - the integrated USB 2.0 Full-Speed peripheral supports device-mode CDC/DFU/HID classes and host-mode enumeration but lacks dedicated BC 1.2 detection circuitry (D+/D− voltage sensing). External BC 1.2 ICs or discrete resistor networks are required for compliant charging port identification.