STMicroelectronics STM32F423VHH6

Overview

STM32F423VHH6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, 100 MHz max CPU frequency, 1.5 MB flash, 320 KB SRAM, and integrated USB OTG FS, dual DACs, and AES hardware encryption. It targets embedded control systems requiring real-time audio processing, secure firmware updates, and low-power human interface devices such as smart thermostats and portable medical sensors.

For engineers reviewing the STM32F423VHH6 datasheet, STM32F423VHH6 pinout, STM32F423VHH6 application, or STM32F423VHH6 equivalent, key selection considerations include its 100 MHz ART Accelerator™-enabled execution from flash, 12-bit 2.4 MSPS ADC with 16 channels, dual 12-bit DACs, DFSDM for PDM microphone interfaces, and VDD range of 1.7–3.6 V across –40 °C to 105 °C operation.

Technical Context

The STM32F423VHH6 implements an Arm Cortex-M4 core with floating-point unit and DSP extensions, paired with ST's Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 100 MHz. Its memory subsystem includes 1.5 MB of embedded flash, 320 KB SRAM, and support for external static memories via FSMC.

It integrates six digital filters for sigma-delta modulators (DFSDM), enabling stereo PDM microphone input with sound source localization, alongside USB OTG FS with integrated PHY, three CAN 2.0B controllers, and hardware AES-128/256 acceleration - all operating within a 1.7–3.6 V supply and extended temperature range up to 105 °C.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/Os, 11 5 V-tolerant pins, and dedicated functions for USB OTG FS (DP/DM), DFSDM (DIN0–DIN5), DAC1/DAC2 (PA4/PA5), and RTC (PC13–PC15).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F413VGT6, the STM32F423VHH6 adds DFSDM and dual DACs at identical pin count and voltage range - essential for voice-enabled IoT and precision analog output. Versus STM32F469NIH6, it trades display acceleration for audio preprocessing capability and smaller footprint, better fitting compact, sensor-rich endpoints.

Availability

STM32F423VHH6 is available at Aetrix Electronics and suitable for smart home controllers, portable medical diagnostics, industrial HMIs, and USB audio peripherals requiring stable component supply, long-term lifecycle assurance, and ECOPACK®2-compliant packaging.

Supply support for STM32F423VHH6 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 automotive-grade components.

The STM32F4-series targets high-performance embedded applications demanding real-time signal processing, rich connectivity, and hardware security - with the F423 subgroup optimized for audio/sensor edge nodes combining low-power operation and advanced analog front-end integration.

FAQ

What is the maximum operating temperature rating for STM32F423VHH6?

The STM32F423VHH6 is qualified for industrial operation up to +105 °C ambient temperature, as confirmed in Section 6.3.1 of DS11580 Rev 8. This rating applies across the full 1.7–3.6 V supply range and includes derating allowances for junction temperature under sustained CPU and peripheral load.

Does STM32F423VHH6 support external memory expansion?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting 8- or 16-bit data buses for SRAM, PSRAM, and NOR Flash. The LQFP64 package exposes 22 address lines, 16 data lines, and dedicated control signals (NE, NOE, NWE, etc.), enabling direct connection to external memories without glue logic.

Can the DFSDM module interface directly with PDM microphones?

Yes - the six DFSDM channels accept native PDM bitstreams. Each channel includes a programmable digital filter (Sinc³/Sinc⁵), configurable oversampling ratio, and built-in FIFO. The device supports stereo PDM input with hardware-assisted sound source localization using dynamic delay tuning, as documented in Section 3.29–3.30 of the datasheet.

Is USB OTG FS functionality self-contained on-chip?

Yes - the STM32F423VHH6 integrates a full-speed USB 2.0 OTG PHY with differential DP/DM pins, eliminating need for external transceivers. It supports device, host, and OTG roles with dedicated USB interrupt and DMA channels, and complies with USB Battery Charging v1.2 specification for downstream port detection.