STMicroelectronics STM32L151VDY6XTR

Overview

STM32L151VDY6XTR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 384 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, integrated 12-bit ADC (1 Msps, up to 40 channels), and dual 12-bit DACs with output buffers - deployed in battery-powered medical sensors and portable industrial data loggers requiring sub-µA standby operation.

For engineers reviewing the STM32L151VDY6XTR datasheet, STM32L151VDY6XTR pinout, STM32L151VDY6XTR application, or STM32L151VDY6XTR equivalent, key selection criteria include verified 290 nA Standby current (3 wakeup pins), 11 µA Low-power run mode, 100-pin LQFP package with 102 5V-tolerant I/Os, and USB 2.0 interface with internal 48 MHz PLL.

Technical Context

This MCU implements dynamic voltage scaling across five low-power modes (Run, Sleep, Low-power Run, Stop, Standby), with hardware-accelerated ECC for Flash and EEPROM ensuring data integrity in harsh environments. Its clock system integrates six independent oscillators - including a factory-trimmed 16 MHz RC (+/-1%), 32 kHz RTC oscillator with calibration, and PLL supporting both CPU and USB timing.

The analog subsystem includes two operational amplifiers, two ultra-low-power comparators with window mode and wakeup capability, and a temperature sensor with calibrated accuracy - all functional down to 1.8 V supply, enabling direct sensor interfacing without external signal conditioning.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for manual rework, thermal dissipation in sealed enclosures, and compatibility with standard PCB assembly processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VDY6XTR, STM32L431RCT6 trades EEPROM and ultra-low-power analog features for FPU performance, while EFM32PG12B500F1024GL125 offers greater memory but sacrifices USB integration and RTC-backed Stop mode - making STM32L151VDY6XTR optimal for compact, battery-powered systems requiring mixed-signal precision and certified data retention.

Availability

STM32L151VDY6XTR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable gas detectors, and industrial predictive maintenance nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VDY6XTR 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 MEMS sensors for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding multi-year battery life, certified data integrity, and integrated analog peripherals - specifically engineered for portable medical devices, smart meters, and environmental sensors.

FAQ

What is the maximum operating temperature range for STM32L151VDY6XTR?

The STM32L151VDY6XTR is rated for operation from -40 °C to +105 °C ambient temperature. This extended industrial temperature range is validated per ST's production test flow and supports deployment in outdoor utility meters, automotive cabin sensors, and industrial control cabinets without derating.

Does STM32L151VDY6XTR include hardware encryption accelerators?

No, the STM32L151VDY6XTR does not integrate dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for basic encryption tasks. For hardware-accelerated security, ST recommends the STM32L5 series, which includes AES-256, PKA, and secure key storage.

Can the internal 16 MHz RC oscillator be used as the system clock source without calibration?

Yes, the internal 16 MHz RC oscillator is factory-trimmed to ±1% accuracy and can serve as the main system clock without external calibration. It supports full-speed USB operation via the internal PLL, eliminating the need for an external crystal in cost-sensitive designs where ±1% timing tolerance is acceptable.

Is the 16 KB EEPROM truly erasable at the byte level?

Yes, the 16 KB EEPROM supports byte-level erase and write operations with guaranteed endurance of 400,000 cycles and data retention of 20 years at 85 °C. Each byte can be independently modified without affecting adjacent locations - essential for storing calibrated sensor offsets and runtime configuration parameters.