STMicroelectronics STM32F303ZET6

Overview

STM32F303ZET6 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU, 72 MHz max CPU frequency, 512 KB Flash, 80 KB SRAM (64 KB + 16 KB CCM), and integrated analog peripherals including four operational amplifiers, seven rail-to-rail comparators, two 12-bit DACs, and four 12-bit ADCs. It operates from 2.0–3.6 V and targets motor control, digital power conversion, and industrial sensing systems requiring real-time signal processing and mixed-signal integration.

For engineers reviewing the STM32F303ZET6 datasheet, STM32F303ZET6 pinout, STM32F303ZET6 application, or STM32F303ZET6 equivalent, key selection factors include its LQFP144 package, dual 12-bit DAC channels with 2.4–3.6 V analog supply, four op-amps configurable in PGA mode, 14 timers (including three advanced-control timers with deadtime), and CAN 2.0B interface for industrial bus communication.

Technical Context

The STM32F303ZET6 implements an ARM Cortex-M4 core with hardware floating-point unit (FPU), single-cycle MAC, and DSP instructions-enabling deterministic execution of motor control algorithms and digital filter routines. Its memory subsystem includes 512 KB Flash with error correction, 64 KB SRAM with parity on first 32 KB, and 16 KB CCM SRAM accessible via instruction/data bus for latency-critical code.

Analog integration centers on a dedicated analog domain: four op-amps (all terminals accessible, 2.4–3.6 V supply), seven ultra-fast comparators (rail-to-rail, 2.0–3.6 V), and four independent ADCs supporting up to 40 channels at 0.20 µs conversion time with selectable 6/8/10/12-bit resolution-coordinated via flexible interconnect matrix and DMA controller.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm) package with exposed thermal pad; 144 leads, 0.5 mm pitch, JEDEC standard footprint. Pinout validated per STMicroelectronics DocID026415 Rev 5, Section 4 "Pinout and pin description".

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303VET6, the ZET6 offers expanded I/O and FSMC connectivity in LQFP144; versus STM32F407VGT6, it trades clock speed and memory for integrated analog peripherals and lower dynamic power-making it optimal for cost-sensitive, analog-rich embedded control.

Availability

STM32F303ZET6 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor nodes, and HMI panels requiring stable component supply across long-lifecycle industrial programs.

Supply support for STM32F303ZET6 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 automotive-grade components since 1987.

The STM32F3 series targets cost-effective, analog-intensive embedded applications-specifically engineered for real-time control of motors, power converters, and human-interface systems with minimal external component count.

FAQ

What is the maximum operating frequency and core type of the STM32F303ZET6?

The STM32F303ZET6 features an ARM Cortex-M4 core with integrated FPU, running at up to 72 MHz. It delivers 90 DMIPS performance and supports DSP instructions and a memory protection unit (MPU). This frequency is sustained under full load within the specified 2.0–3.6 V supply range and industrial temperature grade (–40°C to +85°C).

Does the STM32F303ZET6 support hardware-accelerated cryptographic functions?

No, the STM32F303ZET6 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto support, ST's STM32L4 or STM32H7 series-featuring CryptoCell or AES engines-are recommended alternatives.

How many analog-to-digital converter (ADC) units does the STM32F303ZET6 integrate, and what are their key capabilities?

The device integrates four independent 12-bit ADCs supporting up to 40 total channels. Each ADC achieves 0.20 µs conversion time, offers selectable resolution (6/8/10/12 bits), and operates across a 0–3.6 V input range with dedicated 2.0–3.6 V analog supply (VDDA). They support simultaneous sampling, injected/conversion modes, and hardware oversampling.

Can the STM32F303ZET6 operate in low-power modes while retaining analog functionality such as the comparators or RTC?

Yes. In Stop mode, the RTC, backup registers, and ultra-low-power comparators remain active with VBAT supply; comparators can wake the system on threshold crossing. The 32 kHz LSE oscillator continues running, enabling calendar timekeeping and periodic wakeup. However, op-amps and ADCs require Run or Sleep mode for operation.