STMicroelectronics STM32L151VCT6A

Overview

STM32L151VCT6A from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 256 KB Flash, 32 KB SRAM, 8 KB EEPROM with ECC, integrated LCD controller (up to 8×40 segments), and dual 12-bit ADC/DAC. It operates from 1.65 V to 3.6 V across –40°C to 105°C and targets battery-powered industrial sensors, portable medical devices, and smart metering endpoints requiring sub-µA stop-mode operation.

For engineers reviewing the STM32L151VCT6A datasheet, STM32L151VCT6A pinout, STM32L151VCT6A application, or STM32L151VCT6A equivalent, key selection criteria include its 0.475 µA stop mode (16 wakeup lines), 12-bit 1 Msps ADC with up to 40 channels, USB 2.0 interface with internal 48 MHz PLL, and 102 5V-tolerant I/Os mappable to 16 external interrupt vectors.

Technical Context

The STM32L151VCT6A implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) with hardware-accelerated wake-up from 8 µs. Its Cortex-M3 core runs at up to 32 MHz with 1.25 DMIPS/MHz and includes a memory protection unit (MPU) for secure partitioning of code and data spaces.

Analog integration includes two operational amplifiers, two ultra-low-power comparators with window mode and wake-up capability, and a temperature sensor with calibrated output. Clock architecture supports multiple sources: HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a programmable PLL for USB and CPU clock generation.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin count: 100 leads; body size: 14 mm × 14 mm; max height: 1.6 mm. Compliant with JEDEC MO-220 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VCT6A, the STM32L431RCT6 trades LCD/ECC-EEPROM for FPU and lower stop current, while the STM32L071RBT6 sacrifices USB and display support to achieve lower BOM cost and smaller footprint-making each optimal for distinct subsystem complexity tiers.

Availability

STM32L151VCT6A is available at Aetrix Electronics and suitable for smart utility metering, portable medical monitoring, and industrial wireless sensor nodes requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32L151VCT6A 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 extended battery life, robust analog integration, and industrial-grade reliability-optimized for metering, healthcare, and environmental monitoring.

FAQ

Does STM32L151VCT6A support USB device mode without external crystal?

Yes. The STM32L151VCT6A 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 crystal. This reduces BOM cost and board space while maintaining USB compliance under temperature and voltage variation.

What is the maximum number of ADC channels usable simultaneously in continuous conversion mode?

The 12-bit ADC supports up to 40 input channels, but only one conversion sequence can run at a time. Simultaneous sampling is not supported; however, hardware-accelerated scan sequences allow sequential conversion of all 40 channels at 1 Msps aggregate rate with DMA offload to avoid CPU overhead.

How does the 8 KB EEPROM with ECC differ from standard Flash-based emulated EEPROM?

This is true hardware EEPROM with dedicated silicon cells, supporting byte-level erase/write (100k cycles, 20-year retention) and built-in ECC logic that automatically corrects single-bit errors and detects double-bit errors-unlike Flash emulation which relies on software wear-leveling and lacks hardware error correction.

Can the LCD controller drive segment-based e-Ink displays?

No. The integrated LCD controller is designed exclusively for passive-matrix segment-based LCDs (e.g., 7-segment, custom icons) with AC bias requirements up to 8×40 segments. It lacks the high-voltage charge pump, precise waveform timing, and grayscale control needed for e-Ink, which requires dedicated display drivers.