STMicroelectronics STM32L151VCT6

Overview

STM32L151VCT6 from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller in LQFP100 package, featuring 256KB Flash, 32KB SRAM, 8KB EEPROM with ECC, integrated LCD controller (up to 8×40 segments), and USB 2.0 interface. It operates from 1.65–3.6 V across –40 °C to +105 °C and delivers 185 µA/MHz active current consumption - deployed in battery-powered medical sensors and portable industrial data loggers requiring long-term autonomous operation.

For engineers reviewing the STM32L151VCT6 datasheet, STM32L151VCT6 pinout, STM32L151VCT6 application, or STM32L151VCT6 equivalent, key selection criteria include verified standby current (0.29 µA), dual 12-bit ADC (1 Msps, 25 channels), dual DAC with output buffers, ultra-low-power comparators with wake-up capability, and hardware CRC unit for firmware integrity in resource-constrained embedded systems.

Technical Context

The STM32L151VCT6 implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) with sub-microamp retention states. Its Cortex-M3 core runs at up to 32 MHz with MPU, supported by internal clock sources including factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, and a 65 kHz–4.2 MHz MSI oscillator feeding a dedicated PLL for USB 48 MHz clock generation.

Analog subsystem integration includes two rail-to-rail operational amplifiers, two ultra-low-power comparators (with window mode and wake-up), 12-bit ADC with temperature sensor and VREFINT, and dual buffered 12-bit DACs - all functional down to 1.8 V supply, enabling direct sensor signal conditioning without external components in compact wearable designs.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; 83 fast I/Os (70 tolerant to 5 V), all mappable to 16 external interrupt vectors. Pin functions validated per STMicroelectronics DocID022799 Rev 13, Section 4.

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 STM32L151VCT6, the STM32L431RCT6 trades ultra-low-power analog integration for higher compute density and FPU, while the STM32L071VZT6 reduces peripheral count and memory to achieve lower unit cost - making the L151 optimal for display-equipped, sensor-rich, battery-limited applications demanding balanced analog/digital capability.

Availability

STM32L151VCT6 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial wireless sensor nodes, and wearable health trackers requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VCT6 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 semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications - specifically engineered for battery-operated devices needing extended runtime, integrated analog peripherals, and robust memory reliability in industrial, medical, and metering use cases.

FAQ

Does STM32L151VCT6 support USB device mode without external components?

Yes. The STM32L151VCT6 integrates a full-speed USB 2.0 transceiver with internal pull-up resistors and 48 MHz PLL clock generation. PA11 (D−) and PA12 (D+) pins connect directly to USB connectors - no external PHY, crystal, or termination resistors required for basic HID or CDC device implementations.

What is the maximum operating temperature and voltage range for reliable EEPROM writes?

The STM32L151VCT6 supports EEPROM write operations across its full industrial temperature range (–40 °C to +105 °C) and supply voltage range (1.65 V to 3.6 V). Each 8 KB EEPROM sector guarantees ≥100,000 write/erase cycles and 20-year data retention at 85 °C, verified per ST's characterization in DocID022799 Rev 13, Table 37.

Can the integrated LCD controller drive graphic displays or only segment types?

The LCD controller supports only static and multiplexed segment-type displays (up to 8 commons × 40 segments), not pixel-addressable graphic LCDs or TFTs. It includes built-in contrast adjustment, blinking control, and an integrated step-up converter - enabling direct drive of passive LCD glass used in meters, thermostats, and portable instruments without external bias circuitry.

How many independent analog channels can be sampled simultaneously using the 12-bit ADC?

The STM32L151VCT6 features a single 12-bit ADC with up to 25 input channels, but it does not support true simultaneous sampling. However, it provides hardware-accelerated sequence scanning with configurable sampling times per channel and DMA-triggered data transfer - achieving effective concurrent acquisition across multiple sensors when combined with external sample-and-hold circuits or time-interleaved scheduling.