STMicroelectronics STM32L151VCH6

Overview

STM32L151VCH6 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 driver (8×40 segments), and USB 2.0 interface. It operates from 1.65–3.6 V across –40 °C to +105 °C and delivers 1.25 DMIPS/MHz performance for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM32L151VCH6 datasheet, STM32L151VCH6 pinout, STM32L151VCH6 application, or STM32L151VCH6 equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC (1 Msps, 25 channels), dual 12-bit DACs with buffers, ultra-low-power comparators, and 83 fast I/Os (70 tolerant to 5 V) supporting capacitive touch sensing up to 23 channels.

Technical Context

The STM32L151VCH6 implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) with sub-µA retention states and 8 µs wakeup latency. Its clock system integrates factory-trimmed 16 MHz HSI RC (+/−1%), 32 kHz LSE for RTC calibration, and a 48 MHz PLL dedicated to USB timing.

Analog subsystem includes two operational amplifiers, two ultra-low-power comparators with window mode and wake-up capability, and a temperature sensor with calibrated reference. Memory protection unit (MPU), ECC on Flash and EEPROM, and 96-bit unique ID support secure firmware execution and data integrity in resource-constrained embedded systems.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 °C to +105 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151VCH6, the STM32L431RCT6 offers higher compute throughput but lacks integrated LCD and EEPROM-critical for display-centric metering-while the STM32L071KBT6 reduces cost and active power but sacrifices USB, LCD, and memory reliability features essential for industrial logging.

Availability

STM32L151VCH6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial sensor nodes, and low-power HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32L151VCH6 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 ICs, sensors, and automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding multi-year battery life, robust memory integrity, and integrated analog peripherals - optimized for metering, wearables, and industrial IoT endpoints.

FAQ

What is the maximum operating frequency and core architecture of the STM32L151VCH6?

The STM32L151VCH6 uses an ARM Cortex-M3 core with a maximum CPU frequency of 32 MHz. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a memory protection unit (MPU) for secure task isolation. The core supports Thumb-2 instruction set and operates across the full 1.65–3.6 V supply range without performance derating.

Does the STM32L151VCH6 support USB device functionality without external components?

Yes - it integrates a full-speed USB 2.0 device transceiver with internal 1.5 kΩ pull-up resistor on USB_DP. No external PHY or termination resistors are required. The internal 48 MHz PLL provides precise USB clocking, and the pre-programmed system memory bootloader supports USB-based firmware updates out of the box.

How many analog-to-digital converter (ADC) channels does the STM32L151VCH6 support, and what is its sampling rate?

The STM32L151VCH6 features a single 12-bit ADC with up to 25 input channels and a maximum sampling rate of 1 Msps. It supports hardware oversampling, programmable sampling time per channel, and built-in temperature sensor and VREFINT references. The ADC operates down to 1.8 V supply and includes DMA-triggered continuous conversion modes.

Is the STM32L151VCH6 pin-compatible with other STM32L151 variants in the same package?

Yes - all STM32L151xH parts in LQFP100 (e.g., STM32L151VCH6, STM32L151VCT6) share identical pinouts and electrical characteristics. Differences are limited to Flash size (256 KB), SRAM (32 KB), and EEPROM (8 KB); no pin function reassignment occurs across these variants, enabling drop-in replacement during design iteration or qualification.