STMicroelectronics STM32F303ZET7

Overview

STM32F303ZET7 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU, operating at up to 72 MHz, featuring 512 KB Flash, 80 KB SRAM (64 KB + 16 KB CCM), and integrated analog peripherals including four operational amplifiers, seven comparators, two 12-bit DACs, and four ADCs with 0.20 µs conversion time. It supports CAN 2.0B, USB 2.0 FS, and FSMC for external memory expansion, targeting motor control and industrial sensing systems.

For engineers reviewing the STM32F303ZET7 datasheet, STM32F303ZET7 pinout, STM32F303ZET7 application, or STM32F303ZET7 equivalent, key selection criteria include its dual DAC channels with 2.4–3.6 V analog supply, rail-to-rail op-amp PGA capability, 115 fast I/Os (including 5 V-tolerant), and support for capacitive touch sensing across 24 channels.

Technical Context

The STM32F303ZET7 integrates an ARM Cortex-M4 core with hardware floating-point unit and DSP instructions, enabling real-time signal processing in motor control and sensor fusion applications. Its interconnect matrix enables concurrent peripheral access without bus contention, while the memory protection unit (MPU) enforces secure execution partitioning between firmware modules.

It features a flexible clock system with multiple oscillators (4–32 MHz HSE, 32 kHz LSE, 8 MHz HSI, 40 kHz LSI) and a programmable PLL, supporting dynamic voltage scaling and low-power mode transitions. The analog subsystem includes independent voltage domains (VDDA 2.0–3.6 V, VREFOPAMP 2.4–3.6 V) ensuring precision in mixed-signal operation.

Key Specifications

Pinout & Package

LQFP144 package with 144 leads, 0.5 mm pitch, and exposed thermal pad; compliant with JEDEC MO-220, RoHS and halogen-free standards. Operating temperature range: –40 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F303VET6, the ZET7 delivers expanded I/O and analog channel count in LQFP144; versus STM32F407VGT6, it trades raw CPU speed for integrated analog functionality-making it optimal for cost-sensitive, mixed-signal edge nodes where component count reduction matters.

Availability

STM32F303ZET7 is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, smart power metering, and human-machine interface applications requiring stable component supply and long-term production support.

Supply support for STM32F303ZET7 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-rich embedded applications-emphasizing integrated op-amps, comparators, and high-resolution ADCs to replace discrete signal chains in motor control, sensing, and HMI systems.

FAQ

What is the maximum operating frequency and associated power supply requirement?

The STM32F303ZET7 operates at up to 72 MHz with a VDD range of 2.0–3.6 V. At 72 MHz, it requires VDD ≥ 2.7 V per electrical characteristics (Section 6.3.1). The internal regulator supports full-speed operation across the entire voltage range, but flash wait states increase below 2.7 V to maintain timing compliance.

Does the device support hardware CRC calculation and how is it implemented?

Yes, it includes a dedicated CRC calculation unit compliant with IEEE-802.3 (32-bit polynomial 0x04C11DB7). The unit operates independently of the CPU, accepts data via APB bus writes, and supports both byte and word input modes. It is commonly used for firmware image integrity checks and communication frame validation.

How many independent analog supply domains does the STM32F303ZET7 have and what do they power?

The device has two independent analog domains: VDDA (2.0–3.6 V) powers all ADCs, DACs, comparators, op-amps, and the internal reference voltage generator; VREFOPAMP (2.4–3.6 V) supplies the op-amp reference input. This separation ensures analog accuracy remains unaffected by digital switching noise on VDD.

Is the LQFP144 package of STM32F303ZET7 pin-compatible with other STM32F303xE variants?

Yes, all STM32F303xE devices in LQFP144 share identical pinouts and mechanical dimensions. This includes STM32F303ZET6 and STM32F303ZET7 - differing only in Flash endurance rating (10k vs. 3k erase/write cycles) and temperature grade (–40°C to +85°C for both). Firmware and PCB design are fully interchangeable.