STMicroelectronics STM32L412C8U6

Overview

STM32L412C8U6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 128 KB flash, 40 KB SRAM, and integrated analog peripherals including dual 12-bit ADCs (5 Msps), one operational amplifier with PGA, and one ultra-low-power comparator. It supports external SMPS for optimized efficiency and targets battery-powered IoT sensors, portable medical devices, and energy-harvesting edge nodes.

For engineers reviewing the STM32L412C8U6 datasheet, STM32L412C8U6 pinout, STM32L412C8U6 application, or STM32L412C8U6 equivalent, key selection criteria include its 28 µA/MHz run-mode current at 3.3 V with SMPS, 32 nA standby mode, 4 µs wake-up from Stop mode, and LQFP32 (7×7 mm) package compatibility with space-constrained designs.

Technical Context

The STM32L412C8U6 implements an Arm Cortex-M4 core with FPU and Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz. Its power architecture includes dual-regulator support (LDO/SMPS), FlexPowerControl for dynamic voltage scaling, and hardware-accelerated batch acquisition mode (BAM) for sensor data collection without CPU intervention.

It integrates a full peripheral set for autonomous low-power operation: RTC with calendar and calibration, two low-power 16-bit timers available in Stop mode, LPUART for wake-up communication, and capacitive touch sensing (12 channels). The interconnect matrix enables concurrent peripheral-to-peripheral DMA transfers independent of CPU load.

Key Specifications

Pinout & Package

STM32L412C8U6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package measuring 5×5 mm with 0.5 mm pitch and exposed thermal pad. This RoHS-compliant, ECOPACK2-qualified package supports high-density routing and efficient heat dissipation in portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, the STM32L412C8U6 offers higher memory and no crypto overhead-ideal for deterministic sensor processing. Versus STM32L072CZT6, it delivers 3× more DMIPS and advanced analog features at modest cost premium, justifying upgrade for next-gen edge intelligence.

Availability

STM32L412C8U6 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, energy-harvesting remotes, and smart building occupancy detectors requiring stable component supply across long-lifecycle industrial and consumer programs.

Supply support for STM32L412C8U6 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, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance per microwatt, with emphasis on battery longevity, secure firmware execution, and rich analog integration for intelligent edge devices.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32L412C8U6 operates at up to 80 MHz with 100 DMIPS performance. In Run mode with LDO, it consumes 79 µA/MHz; with external SMPS at 3.3 V, consumption drops to 28 µA/MHz - verified per DS12469 Rev 9 Table 25 and Table 26 under typical conditions (25 °C, VDD = 3.3 V).

Does STM32L412C8U6 support crystal-less USB operation?

Yes. The device integrates a USB 2.0 Full-Speed PHY with clock recovery system (CRS), enabling crystal-less USB operation. This eliminates the need for an external 48 MHz crystal, reducing BOM cost and PCB area - confirmed in Section 3.26 and Table 12 of the datasheet.

How many low-power timer instances are available and what modes do they support?

The STM32L412C8U6 includes two low-power 16-bit timers (LPTIM1 and LPTIM2), both functional in Stop mode and capable of wake-up generation. They operate independently of the main clock tree and support encoder, PWM, and pulse-counting functions - detailed in Section 3.20.4 and Table 10 of DS12469 Rev 9.

What package variant does the 'U6' suffix indicate?

The 'U6' suffix denotes the UFQFPN32 (5×5 mm) package with 32 leads and 0.5 mm pitch. This package features an exposed thermal pad and complies with ECOPACK2 environmental standards - specified in Section 7.6 and Table 1 of the datasheet.