STMicroelectronics STM32F427ZIT6

Overview

STM32F427ZIT6 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 integrates LCD-TFT controller (up to 4096×2048), Chrom-ART Accelerator™, and 8–14-bit parallel camera interface - deployed in industrial HMI, networked motor drives, and embedded vision gateways.

For engineers reviewing the STM32F427ZIT6 datasheet, STM32F427ZIT6 pinout, STM32F427ZIT6 application, or STM32F427ZIT6 equivalent, key selection criteria include its dual USB OTG capability (HS + FS), IEEE 1588v2 Ethernet support, triple 12-bit ADCs (7.2 MSPS interleaved), 168 I/Os (166 5 V-tolerant), and LQFP144 package compatibility with external SDRAM/LCD-TFT systems.

Technical Context

The STM32F427ZIT6 implements an Arm Cortex-M4 core with FPU and ART Accelerator™ enabling zero-wait-state execution from flash at 180 MHz. Its memory subsystem includes two-bank flash for read-while-write, 64 KB CCM RAM for time-critical code/data, and Flexible Memory Controller (FMC) supporting SDRAM, NOR, NAND, and PSRAM.

Peripherals are organized across multiple AHB/APB buses with dedicated DMA channels: Ethernet MAC uses dedicated DMA with MII/RMII and IEEE 1588v2 hardware timestamping; USB OTG HS employs ULPI interface and separate DMA; DCMI supports 54 MB/s parallel camera input; and LTDC drives TFT panels with programmable resolution and pixel clock up to 83 MHz.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm, 0.5 mm pitch), ECOPACK2-compliant, with exposed thermal pad. Pin count: 144 leads; body size: 20 mm × 20 mm; maximum height: 1.6 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F429ZIT6, the STM32F427ZIT6 omits integrated RGB-TFT controller but retains identical connectivity (Ethernet, dual CAN, USB OTG HS/FS) and analog performance (triple ADC, DAC). Against STM32H743ZIT6, it trades raw compute for proven peripheral integration - making it optimal for display- and vision-centric designs where deterministic latency matters more than peak MIPS.

Availability

STM32F427ZIT6 is available at Aetrix Electronics and suitable for industrial HMI, networked motor drives, and embedded vision gateways requiring stable component supply, long-term lifecycle assurance, and full production traceability.

Supply support for STM32F427ZIT6 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 emphasis on industrial reliability and energy efficiency.

The STM32F4-series targets high-performance embedded applications demanding real-time processing, rich connectivity, and graphics capability - specifically engineered for industrial automation, medical devices, and advanced human-machine interfaces.

FAQ

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

The STM32F427ZIT6 achieves 180 MHz maximum CPU frequency using its internal PLL driven by the HSE (4–26 MHz crystal) or HSI (16 MHz RC). The ART Accelerator™ enables zero-wait-state execution from flash memory, eliminating instruction fetch bottlenecks. Voltage regulation must be stable (VDD = 2.7–3.6 V), and VCAP1/VCAP2 2.2 µF capacitors must be correctly placed per layout guidelines.

Does STM32F427ZIT6 support external SDRAM, and what interface does it use?

Yes, the STM32F427ZIT6 supports external SDRAM via its Flexible Memory Controller (FMC) with full 32-bit data bus and dedicated SDRAM command/address lines. It supports standard SDR SDRAM and low-power LPDDR SDRAM, with configurable timing parameters (tRCD, tRP, tRC) set through FMC registers. Up to 256 MB can be addressed depending on row/column bank configuration.

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

The STM32F427ZIT6 integrates three independent 12-bit ADCs (ADC1, ADC2, ADC3), each capable of 2.4 MSPS. In triple interleaved mode with synchronized triggers, they achieve 7.2 MSPS aggregate throughput across up to 24 channels. This enables simultaneous high-speed acquisition of motor phase currents, temperature, and voltage rails without CPU intervention.

Is the USB OTG HS interface compatible with ULPI PHYs, and what clocking is required?

Yes, the USB OTG HS interface supports ULPI (UTMI+ Low Pin Interface) PHYs via dedicated ULPI_CLK, ULPI_Dx, and ULPI_DIR/STP signals. It requires a 60 MHz clock supplied either from the internal USB PHY PLL (driven by HSE or HSI48) or externally. The ULPI interface allows compact, low-pin-count high-speed USB connectivity while maintaining full USB 2.0 HS compliance.