STMicroelectronics STM32F423ZHT6

Overview

STM32F423ZHT6 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 serves as a main application processor in resource-constrained industrial HMI and audio-sensing edge nodes requiring real-time signal processing and secure firmware updates.

For engineers reviewing the STM32F423ZHT6 datasheet, STM32F423ZHT6 pinout, STM32F423ZHT6 application, or STM32F423ZHT6 equivalent, key selection criteria include its 144-pin LQFP package, -40 °C to 105 °C extended temperature rating, 12-bit 2.4 MSPS ADC with 16 channels, DFSDM-based PDM microphone interface, and low-power Stop mode current of 15 µA (typ) with Flash in deep power-down.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 100 MHz, and features eBAM (enhanced Batch Acquisition Mode) for optimized analog acquisition timing. Its memory subsystem includes flexible external static memory controller supporting NOR/PSRAM/SRAM and dual-mode Quad-SPI for high-speed code/data offload.

Power architecture supports three low-power modes: Stop (Flash retained, 42 µA typ), Stop with Flash in deep power-down (15 µA typ), and Standby (1.1 µA typ without RTC). The 3x CAN 2.0B interfaces, SAI, and I2S support deterministic multi-protocol industrial communication and stereo audio streaming.

Key Specifications

Pinout & Package

LQFP144 package with 144 leads, 20 × 20 mm body, 0.5 mm lead pitch, ECOPACK®2 compliant. Pinout defined per DS11580 Rev 8 Section 4.5 (LQFP144 pinout description) and Table 10 (pin definition).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F427VIT6 and STM32F469NIH6, the STM32F423ZHT6 uniquely balances high analog bandwidth (2.4 MSPS ADC), dedicated PDM audio processing (DFSDM), and compact 144-pin LQFP packaging-making it optimal for cost-sensitive, audio- and sensor-centric edge nodes where Ethernet or advanced graphics are unnecessary.

Availability

STM32F423ZHT6 is available at Aetrix Electronics and suitable for industrial sensor hubs, audio edge nodes, secure HMIs, and USB field service tools requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F423ZHT6 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 chips since 1987.

The STM32F4-series targets high-performance embedded applications demanding DSP capability, rich analog integration, and real-time responsiveness - especially in industrial automation, audio processing, and secure IoT endpoints.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F423ZHT6 achieves 100 MHz CPU frequency using its Adaptive Real-time Accelerator (ART Accelerator™), which implements prefetch and branch cache to eliminate flash wait states. This allows deterministic execution of code directly from internal 1.5 MB flash memory without external memory or cache, sustaining 125 DMIPS performance under real-world conditions.

Does this MCU support external memory expansion, and what types are compatible?

Yes - the Flexible Static Memory Controller (FSMC) supports 8-bit and 16-bit parallel interfaces to external SRAM, PSRAM, and NOR Flash memory with programmable timing. It is commonly used for LCD frame buffers, firmware storage expansion, or real-time data logging; however, it does not support NAND Flash or SDRAM.

How many PDM microphones can be connected, and what processing is done on-chip?

The MCU supports up to 12 PDM microphones via its 6-channel DFSDM, each channel accepting stereo PDM input. On-chip processing includes hardware decimation (up to 256×), digital filtering, and dynamic delay tuning for sound source localization - eliminating need for external DSP or FPGA in voice-interface designs.

What are the key differences between Stop mode and Standby mode power consumption?

In Stop mode with Flash in deep power-down, typical current is 15 µA at 25 °C - RAM and registers retained, RTC active, wakeup in ~5 µs. In Standby mode, current drops to 1.1 µA (typ) at 85 °C but loses SRAM content and requires full reset on wakeup; only RTC and 512-byte backup registers remain powered.