STMicroelectronics STM32F733ZEI6

Overview

STM32F733ZEI6 from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller with FPU, operating at up to 216 MHz (462 DMIPS), featuring 512 KB Flash, 256+16+4 KB SRAM, dual USB OTG (HS/FS), and 21 communication interfaces including CAN 2.0B, SAI, and SDMMC - deployed in industrial HMI, motor control gateways, and audio-enabled edge nodes.

For engineers reviewing the STM32F733ZEI6 datasheet, STM32F733ZEI6 pinout, STM32F733ZEI6 application, or STM32F733ZEI6 equivalent, key selection criteria include its 216 MHz real-time performance, integrated USB HS PHY with dedicated DMA, 3×12-bit ADCs (7.2 MSPS triple interleaved), hardware AES-256, and LQFP144 package compatibility with legacy STM32F7 designs.

Technical Context

The STM32F733ZEI6 implements an adaptive real-time accelerator (ART Accelerator) with 8 KB instruction and 8 KB data caches, enabling zero-wait-state execution from Flash and external memories. Its dual-mode Quad-SPI interface supports memory-mapped XIP and direct read/write operations for external flash or PSRAM.

It integrates two independent audio PLLs (PLLI2S and PLLSAI) for precise clock generation to SAI peripherals, and features a flexible external memory controller (FMC) supporting NOR/NAND, SDRAM, and PSRAM with up to 32-bit data bus width - critical for high-bandwidth display or data logging subsystems.

Key Specifications

Pinout & Package

LQFP144 package with exposed thermal pad (EP), 0.5 mm pitch, 20 × 20 mm body size, compliant with JEDEC MO-215 standard. Pin count: 144 leads; thermal resistance θ_JA = 29.5 °C/W (typical, 4-layer board).

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 STM32H743ZIT6, the STM32F733ZEI6 delivers optimal balance of USB HS integration, 512 KB Flash, and LQFP144 footprint - making it ideal for cost-constrained, USB-centric edge devices where Ethernet or dual-core capability is unnecessary.

Availability

STM32F733ZEI6 is available at Aetrix Electronics and suitable for industrial motor control gateways, audio-enabled edge nodes, and secure firmware update bridges requiring stable component supply and long-term manufacturing continuity.

Supply support for STM32F733ZEI6 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 analog components for industrial, automotive, and consumer markets.

The STM32F7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and hardware-accelerated security - specifically optimized for motor control, audio processing, and HMI systems.

FAQ

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

The STM32F733ZEI6 achieves 216 MHz via its Arm Cortex-M7 core with ART Accelerator and dual 8 KB L1 caches. This enables zero-wait-state execution from Flash memory and external memories. The frequency is sustained using the main PLL driven by either the 4–26 MHz HSE crystal or 16 MHz HSI RC oscillator, with voltage scaling set to Range 3 (1.2 V).

Does STM32F733ZEI6 support USB High-Speed without an external PHY?

Yes - the STM32F733ZEI6 integrates a full-speed PHY and a high-speed PHY on-die, enabling native USB 2.0 HS device/host/OTG operation without external components. In HS mode, it uses ULPI interface pins (PB13–PB15, PA11/PA12) only when an external PHY is preferred for ESD robustness or layout flexibility.

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

The device integrates three independent 12-bit ADCs supporting up to 24 external channels. In triple interleaved mode, they achieve a combined sampling rate of 7.2 MSPS with synchronized conversion start and hardware-triggered sequencing - essential for multi-sensor acquisition in motor control and power quality monitoring.

What package and pin-compatible alternatives exist within the STM32F733xx family?

The STM32F733ZEI6 uses LQFP144 (20 × 20 mm). Pin-compatible variants include STM32F733VET6 (LQFP100) and STM32F733IEK6 (UFBGA176), differing only in Flash size (512 KB vs. 256 KB vs. 512 KB) and peripheral count (e.g., fewer timers or ADC channels in lower-density versions). All share identical register mapping and software compatibility.