STMicroelectronics STM32F427IIH7

Overview

STM32F427IIH7 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 interfaces. It targets high-performance embedded applications requiring real-time control, graphics acceleration (Chrom-ART), and multi-interface connectivity - such as industrial HMI, networked motor drives, and IoT gateway controllers.

For engineers reviewing the STM32F427IIH7 datasheet, STM32F427IIH7 pinout, STM32F427IIH7 application, or STM32F427IIH7 equivalent, key selection considerations include its UFBGA176 package, 168 I/Os (166 5 V-tolerant), triple 12-bit ADCs (7.2 MSPS interleaved), LCD-TFT controller support (up to 4096×2048), and hardware IEEE 1588v2 Ethernet timing.

Technical Context

The STM32F427IIH7 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 supporting read-while-write. Its clock system includes four oscillators: 4–26 MHz HSE, 32 kHz LSE for RTC, factory-trimmed 16 MHz HSI (±1%), and calibrated 32 kHz LSI.

Peripheral architecture features a multi-AHB bus matrix, 16-stream DMA with FIFOs, flexible memory controller (FMC) for SDRAM/NOR/NAND, and dedicated hardware blocks: Chrom-ART Accelerator™ (DMA2D) for 2D graphics composition, DCMI interface (54 MB/s), and dual USB OTG controllers - one with on-chip FS PHY, another with ULPI-capable HS PHY and dedicated DMA.

Key Specifications

Pinout & Package

STM32F427IIH7 uses a 176-ball Ultra-Fine-Pitch Ball Grid Array (UFBGA176) package, 10 mm × 10 mm, 0.8 mm pitch, ECOPACK2-compliant. Pin functions are defined per STM32F427xx datasheet Table 10 (DS9405 Rev 13, p.53), with dedicated balls for VDD/VSS, analog supplies (VREF+/VREF−), voltage regulators (VCAP1/VCAP2), and peripheral-specific signals (e.g., ETH_MDC/MDIO, USB_OTG_HS_ULPI, LCD_TFT).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance ARM Cortex-M4 microcontroller applications.

Compared with STM32F429IIT6, the STM32F427IIH7 trades LCD-TFT capability for identical peripheral set in a smaller UFBGA176 package; versus STM32H743VIT6, it offers proven graphics and camera subsystems at lower clock speed and power, ideal for cost-sensitive display-centric designs.

Availability

STM32F427IIH7 is available at Aetrix Electronics and suitable for industrial HMI, networked motor drives, and IoT gateway controllers requiring stable component supply, long-term manufacturability, and ECOPACK2 environmental compliance.

Supply support for STM32F427IIH7 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive chips with focus on energy efficiency and industrial reliability.

The STM32F4-series targets high-performance real-time embedded systems demanding rich connectivity, graphics, and analog integration - optimized for applications where Cortex-M4+FPU, dual-bank flash, and hardware accelerators deliver balanced compute, I/O, and signal processing.

FAQ

What is the maximum operating frequency and associated performance metric for STM32F427IIH7?

The STM32F427IIH7 operates at up to 180 MHz with a measured performance of 225 DMIPS (Dhrystone 2.1), achieving 1.25 DMIPS/MHz. This rating is validated with ART Accelerator™ enabled and code executed from flash memory. The FPU supports single-precision floating-point operations essential for motor control and digital signal processing workloads.

Does STM32F427IIH7 support external SDRAM, and what interface is used?

Yes, STM32F427IIH7 supports external SDRAM via its Flexible Memory Controller (FMC), which provides a configurable 32-bit data bus and address multiplexing. It supports standard SDRAM (including LPDDR/SDR) and is validated for densities up to 256 MB using common JEDEC-compliant parts. The FMC also handles NOR, NAND, and PSRAM devices.

How many ADC channels and sampling rates does STM32F427IIH7 provide?

The device integrates three independent 12-bit ADCs with up to 24 total channels. In triple interleaved mode, they achieve a combined sampling rate of 7.2 MSPS (2.4 MSPS per ADC). Each ADC supports programmable sampling time, analog watchdogs, and hardware oversampling - critical for high-fidelity current/voltage sensing in motor control.

Is STM32F427IIH7 pin-compatible with other STM32F427 variants, and what package options exist?

Yes, all STM32F427xx parts share identical pinouts within the same package type. The STM32F427IIH7 uses UFBGA176 (10×10 mm), matching STM32F427ZIH6 and STM32F427VIH6. Other package options include LQFP100, LQFP144, LQFP176, LQFP208, WLCSP143, and TFBGA216 - each with distinct ball/pin counts and thermal profiles.