STMicroelectronics STM32F746ZEY6TR

Overview

STM32F746ZEY6TR from STMicroelectronics is a high-performance ARM Cortex-M7 microcontroller with FPU, 216 MHz max clock, 512 KB Flash, 320+16+4 KB RAM, integrated LCD-TFT controller, dual CAN, USB OTG HS/FS, and 10/100 Ethernet MAC. It serves as the main application processor in industrial HMI, medical imaging front-ends, and connected gateway devices requiring real-time graphics and multi-interface connectivity.

For engineers reviewing the STM32F746ZEY6TR datasheet, STM32F746ZEY6TR pinout, STM32F746ZEY6TR application, or STM32F746ZEY6TR equivalent, key selection criteria include TCM RAM allocation for deterministic code execution, Chrom-ART Accelerator™ support for GUI rendering, IEEE 1588v2 hardware timestamping for industrial Ethernet synchronization, and dual-mode Quad-SPI for secure firmware update storage.

Technical Context

The device implements an Arm Cortex-M7 core with L1 instruction/data caches (4 KB each) and ART Accelerator™ enabling zero-wait-state execution from flash at 216 MHz. It integrates dual-bank Flash with read-while-write capability and supports external memory via flexible FMC (NOR/NAND/SDRAM).

Its peripheral architecture features two independent SAI audio interfaces with internal audio PLL, SPDIFRX receiver, HDMI-CEC, and a parallel DCMI interface capable of 54 MB/s throughput - all synchronized through a multi-layer AXI/AHB bus matrix with QoS arbitration.

Key Specifications

Pinout & Package

STM32F746ZEY6TR is housed in a UFBGA176 package (10×10 mm, 0.65 mm ball pitch) with 166 5 V-tolerant I/Os, optimized for high-density PCB layouts and thermal dissipation in industrial applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance MCU applications.

Compared with STM32F746ZEY6TR, STM32H743VIT6 offers higher computational headroom but sacrifices integrated display capability, while STM32F767ZIT6 matches feature parity but trades UFBGA176's compactness and thermal efficiency for easier hand-soldering.

Availability

STM32F746ZEY6TR is available at Aetrix Electronics and suitable for industrial HMI, medical imaging front-ends, and smart energy gateways requiring stable component supply, long-term lifecycle assurance, and qualified sourcing for production ramp.

Supply support for STM32F746ZEY6TR 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 management ICs, sensors, and automotive-grade components.

The STM32F7 series targets high-end embedded applications demanding real-time performance, rich connectivity, and advanced graphics - specifically engineered for industrial automation, medical devices, and IoT edge nodes with local UI and network aggregation.

FAQ

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

The STM32F746ZEY6TR achieves 216 MHz maximum CPU frequency using its Arm Cortex-M7 core with ART Accelerator™ and 4 KB instruction/data caches. This configuration enables zero-wait-state execution from embedded Flash memory, validated across temperature and voltage ranges per DS10916 Rev 5 Section 6.3.11. The system clock derives from PLL sources with internal/external oscillators, supporting dynamic voltage/frequency scaling.

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

Yes, STM32F746ZEY6TR supports external SDRAM via its Flexible Memory Controller (FMC), which provides a 32-bit data bus with programmable timing registers. The FMC supports LPDDR/SDR SDRAM, NOR, PSRAM, and NAND memories, with dedicated control signals (CK, CKE, CAS, RAS, WE) and bank addressing. Configuration is performed through FMC_BCR/FMC_BTR registers per RM0385 Section 42.4.

How many I/O pins are 5 V tolerant, and which banks support this?

STM32F746ZEY6TR provides 166 5 V-tolerant I/Os across multiple GPIO ports (PA–PK), as confirmed in DS10916 Rev 5 Table 10 and Section 3.38. Tolerance applies to all I/Os powered by VDDIO2 supply (not VDDIO1), and requires VDDIO2 ≥ VDD – 0.5 V. Pins in Bank 1 (e.g., PA0–PA15) and Bank 2 (PB0–PB15) are fully 5 V tolerant when VDDIO2 is active.

Is there hardware support for cryptographic operations?

No, STM32F746ZEY6TR does not integrate dedicated cryptographic accelerators (AES, SHA, PKA). It relies on software libraries (e.g., mbed TLS) running on the Cortex-M7 core. However, it includes a true random number generator (RNG) compliant with NIST SP800-90B for entropy seeding, and a CRC calculation unit for data integrity checks - both referenced in DS10916 Rev 5 Sections 3.37 and 3.4.