STMicroelectronics STM32L151VCT6ATR

Overview

STM32L151VCT6ATR 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 ADCs (1 Msps, up to 40 channels). It operates from 1.65–3.6 V across –40°C to +105°C and delivers 11 µA low-power run mode current, enabling battery-powered medical sensors and portable industrial monitors.

For engineers reviewing the STM32L151VCT6ATR datasheet, STM32L151VCT6ATR pinout, STM32L151VCT6ATR application, or STM32L151VCT6ATR equivalent, key selection criteria include its 0.475 µA stop mode current, USB 2.0 interface with internal 48 MHz PLL, dual operational amplifiers, 12-bit DAC with output buffers, and 102 5V-tolerant I/Os-critical for energy-constrained embedded control and sensor fusion designs.

Technical Context

The STM32L151VCT6ATR implements dynamic voltage scaling and multiple low-power modes-including stop mode with RTC (1.35 µA) and standby mode with 3 wakeup pins (305 nA)-to sustain multi-year operation on coin-cell batteries. Its memory protection unit (MPU), CRC calculation unit, and 96-bit unique ID support secure firmware execution and device authentication in regulated environments.

It integrates a rich analog front-end: two rail-to-rail op-amps, two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, and internal voltage reference (VREFINT). Clocking includes factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, and PLL supporting both CPU and USB clock domains.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm) package with 100-pin footprint, 0.5 mm pitch, and exposed thermal pad - optimized for thermal dissipation in compact industrial modules and handheld diagnostics equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VCT6ATR, the STM32L431RCT6 trades ultra-low-power analog integration for computational headroom, while the EFM32PG12B500F1024GL125 achieves deeper sleep at the cost of interface flexibility-making the STM32L151VCT6ATR optimal for USB-connected, display-equipped, battery-constrained edge devices.

Availability

STM32L151VCT6ATR is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart utility meters, and low-power human interface modules requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L151VCT6ATR 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, MEMS, and automotive-grade components since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and industrial temperature resilience-specifically for portable instrumentation, energy metering, and wearable health devices.

FAQ

Does STM32L151VCT6ATR support USB device mode without external components?

Yes. The part integrates a full-speed USB 2.0 transceiver with internal 1.5 kΩ pull-up resistor on D+, 3.3 V regulator, and 48 MHz PLL-enabling USB device enumeration and communication using only a standard USB Type-A connector and minimal passive components.

What is the maximum number of capacitive sensing channels supported?

The STM32L151VCT6ATR supports up to 23 capacitive sensing channels via its integrated touch sensing controller (TSC), with hardware-accelerated acquisition, spread-spectrum modulation, and automatic recalibration-eliminating need for external touch ICs in slider, wheel, or button interfaces.

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

This is true hardware EEPROM with dedicated silicon cells, ECC circuitry, and guaranteed 40,000 write/erase cycles and 20-year data retention at 85°C. Unlike Flash-emulated EEPROM, it supports byte-level writes, zero software overhead, and concurrent read/write operations-critical for high-frequency parameter logging.

Is the LCD controller compatible with common segment-based glass displays?

Yes. The integrated LCD controller drives up to 320 segments (8 commons × 40 segments) with programmable bias, contrast adjustment, blinking, and step-up converter-supporting standard 3.3 V or 5 V segment LCDs used in portable meters, thermostats, and handheld test equipment without external drivers.