STMicroelectronics STM32F733IET6

Overview

STM32F733IET6 from STMicroelectronics is a high-performance Arm® Cortex®-M7 32-bit microcontroller with FPU, operating at up to 216 MHz (462 DMIPS), featuring 512 KB Flash, 256+16+4 KB SRAM, dual USB OTG (FS/HS), three 12-bit ADCs (2.4 MSPS), two 12-bit DACs, and CAN 2.0B - deployed in industrial motor control systems requiring deterministic real-time response and multi-interface connectivity.

For engineers reviewing the STM32F733IET6 datasheet, STM32F733IET6 pinout, STM32F733IET6 application, or STM32F733IET6 equivalent, key selection considerations include its 216 MHz Cortex-M7 core with L1 cache, dual-mode Quad-SPI interface, hardware AES-128/256 accelerator, true RNG, and support for external SDRAM/NOR via flexible memory controller - all in an LQFP100 package with 138 5 V-tolerant I/Os.

Technical Context

The STM32F733IET6 implements a tightly coupled Arm Cortex-M7 core with ART Accelerator and 8 KB instruction + 8 KB data caches, enabling zero-wait-state execution from Flash or external memory. Its AXI-AHB bus matrix supports concurrent high-bandwidth access across CPU, DMA, and peripherals including dual SAI audio interfaces and two SDMMC hosts.

It integrates dual USB OTG controllers - one full-speed with on-chip PHY, one high-speed with dedicated DMA and dual PHY (on-chip FS + HS or ULPI) - alongside a bxCAN 2.0B controller, three independent 12-bit ADCs with triple interleaved mode (7.2 MSPS), and two 12-bit DACs with configurable output buffers.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pin count: 100 leads, including 82 general-purpose I/Os (of which 138 total I/Os are supported across package variants - LQFP100 provides 82 user-accessible pins plus power/ground/controls).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F767ZIT6 and STM32H743VIT6, the STM32F733IET6 uniquely balances USB HS integration, compact LQFP100 footprint, and sufficient memory for real-time control - making it optimal for space-constrained, high-speed peripheral-centric designs without Ethernet or dual-core overhead.

Availability

STM32F733IET6 is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, smart grid gateways, and automotive diagnostic tools requiring stable component supply and long-term production support.

Supply support for STM32F733IET6 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32F7 series targets high-end embedded applications demanding real-time performance, rich connectivity, and hardware security - specifically engineered for motor control, audio processing, and protocol gateway use cases.

FAQ

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

The STM32F733IET6 achieves 216 MHz via its Arm Cortex-M7 core with ART Accelerator and dual 8 KB L1 caches. This frequency requires a stable 4–26 MHz HSE crystal input fed into the main PLL, with proper VCAP capacitor decoupling (10 µF ceramic on VCAP1/VCAP2). The ART Accelerator eliminates Flash wait states, enabling deterministic execution at full speed.

Does the LQFP100 package support USB High-Speed operation?

Yes - the STM32F733IET6 in LQFP100 supports USB HS via the ULPI interface (pins PB14/PB15 and associated control signals), requiring an external ULPI-compliant PHY. It does not integrate an on-die HS PHY in this package; that feature is reserved for BGA variants like UFBGA176.

How many ADC channels are available and what is their effective sampling rate?

The device has three independent 12-bit ADCs, each supporting up to 24 channels. In triple interleaved mode, they achieve 7.2 MSPS aggregate sampling rate with synchronized conversion start - ideal for multi-phase motor current sensing where timing coherence across channels is critical.

What debug interfaces are supported and what trace capability exists?

SWD and JTAG interfaces are supported via dedicated pins (SWCLK, SWDIO, JTCK, JTDI, JTDO, JTMS). The Cortex-M7 Trace Macrocell™ enables real-time instruction and data trace over SWO or parallel trace port - allowing non-intrusive profiling of timing-critical code sections in development.