STMicroelectronics STM32L151VCT6D

Overview

STM32L151VCT6D 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 driver (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 and delivers 1.25 DMIPS/MHz performance-designed for battery-powered industrial sensors and portable medical devices requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L151VCT6D datasheet, STM32L151VCT6D pinout, STM32L151VCT6D application, or STM32L151VCT6D equivalent, key selection criteria include its 0.44 µA Stop mode current, dual 12-bit ADC (1 Msps, 25 channels), dual 12-bit DAC with buffers, two operational amplifiers, and 70 5V-tolerant I/Os-all in LQFP100 package with full SWD/JTAG debug support.

Technical Context

The STM32L151VCT6D implements dynamic voltage scaling and multiple low-power modes-including Standby (0.29 µA), Stop (0.44 µA), and Low-power Run (8.6 µA)-with hardware-accelerated wakeup (<8 µs). Its Cortex-M3 core runs up to 32 MHz using internal 16 MHz RC (+/−1%) or external crystal (1–24 MHz), supported by a dedicated 48 MHz PLL for USB timing.

Analog subsystem includes two rail-to-rail op-amps, two ultra-low-power comparators with window mode and wake-up capability, and a temperature sensor with calibrated output. The LCD controller supports contrast adjustment and blinking without external components, while the 128-byte backup register retains data during power loss.

Key Specifications

Pinout & Package

LQFP100 package with exposed thermal pad (EP), 100-pin low-profile quad flat configuration. Pin count and function mapping validated per STMicroelectronics DocID022799 Rev 13, Section 4 "Pin descriptions".

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VCT6D, the STM32L431RCT6 offers superior processing headroom and lower standby current in Vbat mode but lacks integrated LCD and EEPROM-requiring external components for display or persistent parameter storage. The STM32L071RBT6 reduces cost and complexity but sacrifices analog feature depth and USB capability.

Availability

STM32L151VCT6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and low-power HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VCT6D 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 extended battery life, integrated analog peripherals, and industrial-grade reliability-optimized for metering, wearable health, and environmental monitoring systems.

FAQ

What is the maximum operating frequency and core architecture of the STM32L151VCT6D?

The STM32L151VCT6D features an ARM Cortex-M3 core rated for up to 32 MHz operation. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a Memory Protection Unit (MPU) for secure memory partitioning. The CPU supports Thumb-2 instruction set and executes code from Flash or SRAM with zero-wait-state access up to 16 MHz.

Does the STM32L151VCT6D support USB functionality without external components?

Yes-the STM32L151VCT6D integrates a full-speed USB 2.0 device interface with an internal transceiver, 48 MHz PLL clock source, and programmable pull-up resistors on PA11/PA12. No external PHY, crystal, or termination resistors are required for basic HID or CDC-class operation, reducing bill-of-materials and PCB area.

How many analog-to-digital converter (ADC) channels does this MCU provide, and what is its sampling rate?

The STM32L151VCT6D includes a single 12-bit ADC with up to 25 input channels and a maximum sampling rate of 1 Msps. It supports hardware oversampling, injected/conversion sequencing, and built-in temperature sensor and VREFINT channels-enabling high-accuracy sensor signal acquisition in low-power modes down to 1.8 V supply.

Is the STM32L151VCT6D pin-compatible with other members of the STM32L151x family?

Yes-within the same LQFP100 package variant, the STM32L151VCT6D shares identical pinout with STM32L152VCT6 and STM32L151RCT6 (LQFP64 differs). This allows hardware reuse across variants differing in Flash size, EEPROM presence, or peripheral enablement-facilitating scalable design and migration paths without PCB redesign.