STMicroelectronics STM32F427IIH6TR

Overview

STM32F427IIH6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 180 MHz (225 DMIPS), featuring 2 MB flash, 256+4 KB SRAM (including 64 KB CCM), USB OTG HS/FS, 10/100 Ethernet MAC, and dual CAN 2.0B - deployed in industrial HMI controllers requiring real-time graphics, connectivity, and deterministic I/O.

For engineers reviewing the STM32F427IIH6TR datasheet, STM32F427IIH6TR pinout, STM32F427IIH6TR application, or STM32F427IIH6TR equivalent, key selection criteria include its 17 timers (12×16-bit + 2×32-bit), triple 12-bit ADCs (7.2 MSPS interleaved), LCD-TFT controller support (up to 4096×2048), Chrom-ART Accelerator™, and UFBGA176 package with 166 5 V-tolerant I/Os.

Technical Context

The STM32F427IIH6TR integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, alongside a Memory Protection Unit (MPU) and dual-bank flash architecture supporting read-while-write operations. Its multi-AHB bus matrix enables concurrent access to flash, SRAM, and peripherals without contention.

It features a dedicated Ethernet MAC with IEEE 1588v2 hardware timestamping, USB 2.0 high-speed OTG with ULPI interface and dedicated DMA, and a parallel camera interface (DCMI) capable of 54 MB/s throughput - all synchronized via a flexible clock tree with multiple PLLs (main, audio, SAI).

Key Specifications

Pinout & Package

STM32F427IIH6TR uses a 176-ball Ultra Fine Pitch Ball Grid Array (UFBGA176) package measuring 10 mm × 10 mm with 0.65 mm ball pitch, optimized for high-density PCB layouts in space-constrained industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F429IIT6, STM32F427IIH6TR removes redundant LTDC logic to reduce die size and power, while retaining identical CPU, memory, and connectivity - making it ideal for non-LCD-centric applications. Against STM32F469NIH6, it lacks MIPI-DSI and crypto accelerators but offers better price/performance for standard industrial control where those features are unused.

Availability

STM32F427IIH6TR is available at Aetrix Electronics and suitable for industrial HMI panels, PLC gateways, medical imaging subsystems, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant ECOPACK2 packaging.

Supply support for STM32F427IIH6TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F4-series targets high-performance embedded applications demanding real-time processing, rich connectivity, and graphical user interfaces - with the F427 variant optimized for cost-conscious industrial control and gateway use cases where LCD-TFT controller is optional.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32F427IIH6TR operates at up to 180 MHz, delivering 225 DMIPS measured using Dhrystone 2.1 benchmark. This performance is sustained with zero wait states in flash execution thanks to the ART Accelerator™, and includes full DSP instruction set support for FFT, filtering, and motor control algorithms.

Does this MCU support external SDRAM, and what interface is used?

Yes, the STM32F427IIH6TR supports external SDRAM up to 256 MB via its Flexible Memory Controller (FMC), which implements a 32-bit data bus with dedicated control signals (RAS, CAS, WE, CS, CLK, DQM). It supports both standard SDRAM and low-power SDR SDRAM (LPSDR), with configurable timing parameters per memory region.

How many independent ADC units does it have, and what is their combined sampling capability?

The device integrates three independent 12-bit ADCs, each capable of 2.4 MSPS. In triple interleaved mode, they achieve a combined sampling rate of 7.2 MSPS with synchronized conversion start and shared data register - enabling high-fidelity multi-channel sensor acquisition for vibration analysis or power quality monitoring.

Is the UFBGA176 package lead-free and RoHS-compliant?

Yes, the STM32F427IIH6TR in UFBGA176 package is manufactured using ECOPACK2-compliant processes, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The package uses lead-free solderable terminations and halogen-free molding compound, certified per ST's environmental compliance documentation.