STMicroelectronics STM32L152VCT6D

Overview

STM32L152VCT6D 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 USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40 °C to 105 °C, delivers 1.25 DMIPS/MHz, and achieves 0.44 µA Stop mode current - enabling battery-powered medical sensors and portable industrial meters.

For engineers reviewing the STM32L152VCT6D datasheet, STM32L152VCT6D pinout, STM32L152VCT6D application, or STM32L152VCT6D equivalent, key selection criteria include its dual 12-bit DACs with output buffers, 12-bit ADC (1 Msps, 25 channels), ultra-low-power comparators with wake-up capability, and support for dynamic voltage scaling across Run/Stop/Standby modes.

Technical Context

The STM32L152VCT6D integrates a Cortex-M3 core with Memory Protection Unit (MPU), supporting deterministic real-time execution and secure memory partitioning. Its clock system combines multiple sources: 1–24 MHz HSE, 32 kHz LSE for RTC, 16 MHz HSI (±1%), and a multispeed MSI (65 kHz–4.2 MHz) feeding a dedicated PLL for USB 48 MHz generation.

Power architecture includes five low-power modes (Run, Sleep, Low-power Run, Stop, Standby), each with configurable peripheral retention and wakeup sources - including 16 wakeup lines in Stop mode and 3 pins in Standby. The embedded 8 KB true EEPROM with ECC enables robust data logging without external nonvolatile memory.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.

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 STM32L152VCT6D, the STM32L432KCU6 offers higher computational headroom at the expense of EEPROM and LCD integration, while the STM32L072CZT6 reduces BOM cost and static power but sacrifices USB connectivity and analog peripheral richness - making the L152 optimal for feature-complete, battery-constrained HMI systems.

Availability

STM32L152VCT6D is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial handheld terminals, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L152VCT6D 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 demanding long battery life, wide temperature operation, and integrated analog peripherals - specifically optimized for portable instrumentation, wearables, and energy-conscious industrial controls.

FAQ

Does STM32L152VCT6D support crystal-less USB operation?

No. The STM32L152VCT6D requires an external 4–24 MHz crystal (HSE) for USB 2.0 Full-Speed operation, as its internal PLL relies on HSE input to generate the precise 48 MHz clock. Unlike later STM32L0/L4 series, it lacks a factory-trimmed RC oscillator qualified for USB timing tolerance.

What is the maximum allowed I/O pin voltage when VDDIO = 3.3 V?

70 of the 83 GPIOs are 5V-tolerant regardless of VDDIO level - meaning they accept up to 5.5 V on input even when VDDIO is 3.3 V. This allows safe interfacing with 5 V logic peripherals without level shifters, as confirmed in Section 6.3.13 of the datasheet.

Can the internal 8 KB EEPROM be used for firmware over-the-air (OTA) update storage?

Yes. The 8 KB true EEPROM supports byte-write and page-erase operations with >300,000 endurance cycles and >20-year data retention. It is commonly used to store bootloader configuration, cryptographic keys, and OTA update staging buffers - though application code must manage wear leveling in software.

How many simultaneous capacitive sensing channels can operate in low-power mode?

Up to 23 channels can be scanned in low-power mode with typical average current below 1 µA per channel during active measurement bursts. The hardware-accelerated capacitive sensing controller (TS) operates independently of the CPU, allowing background scanning while the core remains in Stop mode.