STMicroelectronics STM32F427IIT7

Overview

STM32F427IIT7 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, motor control gateways, and networked medical devices.

For engineers reviewing the STM32F427IIT7 datasheet, STM32F427IIT7 pinout, STM32F427IIT7 application, or STM32F427IIT7 equivalent, key selection criteria include its dual USB OTG controllers (FS + HS with dedicated DMA), IEEE 1588v2-capable Ethernet MAC, LCD-TFT controller support (though not integrated in F427xx), and 168 I/Os with 90 MHz toggle rate and 5 V tolerance on 166 pins.

Technical Context

The STM32F427IIT7 implements an Arm Cortex-M4 core with hardware FPU and Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 180 MHz. Its memory subsystem includes two-bank flash (enabling read-while-write) and flexible external memory controller supporting SDRAM, NOR, NAND, and PSRAM.

Peripherals are organized across multiple AHB/APB buses with a multi-layer AHB matrix; it integrates dual USB OTG PHYs (one full-speed on-chip, one high-speed with ULPI interface), a 10/100 Ethernet MAC with IEEE 1588v2 hardware timestamping, and three 12-bit ADCs (2.4 MSPS each, 7.2 MSPS in triple interleaved mode).

Key Specifications

Pinout & Package

LQFP176 (24 × 24 mm) package with 176 leads, ECOPACK2 compliant. Pinout validated per STMicroelectronics DS9405 Rev 13, Table 10 (STM32F427xx/429xx pin definitions) and Figure 13 (LQFP176 pin layout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F427IIT7, the STM32F429ZIT6 adds display-specific IP at identical pinout and price point, while the STM32H743VIT6 trades USB HS flexibility for raw performance and security - making the F427IIT7 optimal for balanced industrial connectivity where display is external or absent.

Availability

STM32F427IIT7 is available at Aetrix Electronics and suitable for industrial motor control gateways, networked medical diagnostic devices, and smart building HVAC controllers requiring stable component supply through 2028 and beyond.

Supply support for STM32F427IIT7 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 since 1987.

The STM32F4-series targets high-performance real-time embedded applications demanding rich connectivity, analog integration, and deterministic execution - optimized for industrial automation, medical equipment, and IoT edge nodes.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32F427IIT7?

The STM32F427IIT7 operates at up to 180 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™. Its performance is rated at 225 DMIPS (Dhrystone 2.1), equivalent to 1.25 DMIPS/MHz. This is achieved with zero-wait-state execution from flash memory, confirmed in ST's DS9405 Rev 13 datasheet Section 3.1.

Does the STM32F427IIT7 support hardware-accelerated graphics or LCD-TFT display driving?

No - unlike the STM32F429xx series, the STM32F427IIT7 does not integrate an LCD-TFT controller or Chrom-ART Accelerator™ (DMA2D). It supports parallel camera interface (DCMI) and generic GPIO-driven displays, but external graphics controller or FPGA is required for TFT driving. This distinction is explicitly stated in Section 3.10 of DS9405 Rev 13.

How many USB interfaces does the STM32F427IIT7 provide, and what are their physical implementations?

The STM32F427IIT7 provides two independent USB interfaces: USB OTG Full-Speed (FS) with integrated on-chip PHY (pins PA11/PA12), and USB OTG High-Speed (HS) implemented via ULPI interface (8-bit parallel bus + 60 MHz clock on PH4–PH11). Both support device/host/OTG roles with dedicated DMA channels, per Sections 3.33–3.34 of DS9405 Rev 13.

What Ethernet capabilities does the STM32F427IIT7 offer, and which physical layer interfaces are supported?

The STM32F427IIT7 integrates a 10/100 Ethernet MAC with dedicated DMA and hardware IEEE 1588v2 timestamping. It supports both MII (25-pin) and RMII (9-pin) physical layer interfaces - enabling direct connection to standard Ethernet PHYs such as LAN8720A or DP83848. This is documented in Section 3.31 and Table 2 of DS9405 Rev 13.