STMicroelectronics STM32F745IEK7TR

Overview

STM32F745IEK7TR from STMicroelectronics is a high-performance ARM Cortex-M7 32-bit microcontroller with FPU, delivering 462 DMIPS at 216 MHz. It integrates 1 MB Flash, 320 KB SRAM (including 64 KB data TCM and 16 KB instruction TCM), dual USB OTG (FS/HS), 10/100 Ethernet MAC, LCD-TFT controller up to XGA, and triple 12-bit ADCs (7.2 MSPS interleaved). It targets real-time industrial HMI, motor control gateways, and embedded vision systems requiring deterministic processing and rich peripheral integration.

For engineers reviewing the STM32F745IEK7TR datasheet, STM32F745IEK7TR pinout, STM32F745IEK7TR application, or STM32F745IEK7TR equivalent, key selection criteria include TCM RAM allocation for real-time tasks, dual USB OTG + Ethernet coexistence, Chrom-ART Accelerator™ for GUI rendering, and 168 I/Os with 108 MHz toggle rate and 5 V tolerance - critical for mixed-signal industrial edge nodes.

Technical Context

The STM32F745IEK7TR implements an adaptive real-time accelerator (ART Accelerator™) with 4 KB instruction and 4 KB data L1 caches, enabling zero-wait-state execution from Flash and external memories. Its AXI-AHB bus matrix supports concurrent high-bandwidth access to Flash, SRAM, and peripherals including FMC, Quad-SPI, and Ethernet DMA.

It features dual-mode Quad-SPI, parallel DCMI (54 MB/s), two SAIs, SPDIFRX, HDMI-CEC, and bxCAN 2.0B - all synchronized via multiple PLLs (main PLL, audio PLL, SAI PLL) with independent clock domains for jitter-sensitive audio/video subsystems.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; 100-pin quad flat configuration optimized for industrial PCB layout and thermal dissipation in enclosed enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance Cortex-M7 microcontroller applications.

Compared with STM32F745IEK7TR, STM32F746IGT6 offers expanded display interface capability at larger footprint, while STM32H743VIT6 delivers significantly higher compute density and security features at cost and complexity premium - both require PCB and firmware rework, making STM32F745IEK7TR optimal for balanced performance, integration, and LQFP100 layout efficiency.

Availability

STM32F745IEK7TR is available at Aetrix Electronics and suitable for industrial HMIs, motor control gateways, embedded vision sensors, and secure field gateways requiring stable component supply throughout product lifecycles.

Supply support for STM32F745IEK7TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad industrial IP portfolio.

The STM32F7 series is designed for high-end embedded applications demanding real-time determinism, rich multimedia interfaces, and seamless connectivity - targeting industrial automation, medical devices, and advanced human-machine interaction.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32F745IEK7TR?

The STM32F745IEK7TR operates at up to 216 MHz with an ARM Cortex-M7 core featuring FPU and L1 cache. Its performance is rated at 462 DMIPS (Dhrystone 2.1), equivalent to 2.14 DMIPS/MHz. This is achieved with zero-wait-state execution enabled by the ART Accelerator™ and 4 KB instruction/data caches, verified under typical conditions with code running from Flash.

Does the STM32F745IEK7TR support external SDRAM, and what interface is used?

Yes, the STM32F745IEK7TR supports external SDRAM via its Flexible Memory Controller (FMC), which provides a configurable 32-bit data bus and dedicated control signals (RAS, CAS, WE, CS, CLK, DQM). It supports standard SDRAM and low-power SDR SDRAM (LPDDR) with programmable timing parameters, enabling frame buffer expansion for LCD or video applications.

How many ADC channels does the STM32F745IEK7TR support, and what is the maximum aggregate sampling rate?

The STM32F745IEK7TR integrates three independent 12-bit ADCs, supporting up to 24 external channels total. In triple interleaved mode, they achieve a combined sampling rate of 7.2 MSPS (2.4 MSPS per ADC), with hardware synchronization and shared DMA channel - confirmed in Section 3.39 of DS10916 Rev 5.

What are the key differences between the STM32F745IEK7TR and STM32F746xx series in terms of display interface capability?

The STM32F745IEK7TR supports LCD-TFT up to XGA resolution via parallel 8080/6800 interface and LTDC controller, but lacks MIPI-DSI. The STM32F746xx adds native MIPI-DSI support and enhanced RGB interface (up to 24-bit), enabling direct connection to modern high-resolution panels - a hardware-level difference confirmed in Table 2 and Section 3.10 of the datasheet.