STMicroelectronics STM32L451VCI6

Overview

STM32L451VCI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, and hardware-accelerated capacitive touch sensing - deployed in battery-powered industrial sensors and portable medical monitors.

For engineers reviewing the STM32L451VCI6 datasheet, STM32L451VCI6 pinout, STM32L451VCI6 application, or STM32L451VCI6 equivalent, key selection criteria include verified Stop 2 mode current (2.05 µA), LPUART wake-up capability, ART Accelerator™ zero-wait-state Flash execution, and UFBGA100 package compatibility with high-density PCB layouts.

Technical Context

The device implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling deterministic 0-wait-state execution from Flash at 80 MHz, paired with a memory protection unit (MPU) and interconnect matrix for concurrent peripheral access. Its power architecture supports seven low-power modes, including Shutdown (22 nA), Standby with RTC (375 nA), and Stop 2 (2.05 µA), all managed via hardware-controlled voltage scaling and BOR circuitry.

Clock system integration includes dual PLLs (system/audio), auto-trimmed MSI (±0.25%), HSE (4–48 MHz), LSE (32.768 kHz), and HSI48 for USB/SAI timing. Analog subsystem features independent supply domains, 2x ultra-low-power comparators, 1x op-amp with PGA, and buffered 2.048 V/2.5 V references - all specified across –40 °C to +125 °C.

Key Specifications

Pinout & Package

UFBGA100 package (7×7 mm, 0.5 mm pitch) with 100 terminals, optimized for high I/O density and thermal dissipation in space-constrained designs. Pin functions validated per STMicroelectronics DS11910 Rev 5, Section 4 ("Pinouts and pin description").

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L476VGT6 and STM32L552VET6, the STM32L451VCI6 uniquely balances audio (SAI), storage (SDMMC), and ultra-low-power operation (2.05 µA Stop 2) - making it optimal for battery-powered edge devices requiring both signal processing and local data persistence.

Availability

STM32L451VCI6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter interface modules, and automotive cabin air quality sensors requiring stable component supply across extended product lifecycles.

Supply support for STM32L451VCI6 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, MEMS, and analog chips for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with emphasis on battery longevity, real-time responsiveness, and integrated analog/mixed-signal capability for sensor-centric edge devices.

FAQ

What is the maximum operating frequency and associated DMIPS rating of the STM32L451VCI6?

The STM32L451VCI6 operates at a maximum CPU frequency of 80 MHz, delivering 100 DMIPS (Dhrystone 2.1) performance. This is achieved using the ART Accelerator™ for zero-wait-state Flash execution and includes full DSP instruction support. The core integrates a single-precision FPU and MPU, enabling efficient floating-point math and memory partitioning for safety-critical tasks.

Does the STM32L451VCI6 support hardware-based cryptographic operations?

The STM32L451VCI6 includes a true random number generator (RNG) compliant with NIST SP800-90B, CRC calculation unit, and 96-bit unique ID - but no dedicated AES or PKA accelerator. Cryptographic algorithms must be implemented in software; for hardware-accelerated crypto, consider the STM32L5 or STM32U5 series.

Which low-power mode provides the lowest active current while retaining RTC and backup register functionality?

Standby mode with RTC enabled consumes 375 nA - the lowest active current retaining RTC calendar, alarms, and 32×32-bit backup registers. This mode powers down the CPU, Flash, SRAM, and most peripherals while maintaining the RTC oscillator (LSE or LSI) and VBAT domain. It is distinct from VBAT mode (145 nA), which retains only RTC and backup registers without system clock.

Is the STM32L451VCI6 pin-compatible with other members of the STM32L451xx family?

Yes - all STM32L451xx variants sharing the UFBGA100 package (e.g., STM32L451VCT6, STM32L451VCH6) are pin-compatible. Differences lie in Flash size (256 KB vs. 512 KB), temperature grade (85 °C vs. 125 °C), and minor peripheral enablement; firmware is binary-compatible within the same Flash/SRAM configuration.