STMicroelectronics STM32F303VBT6TR

Overview

STM32F303VBT6TR from STMicroelectronics is an Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 72 MHz, featuring 128 KB Flash, 40 KB SRAM (with HW parity on first 16 KB), four 12-bit ADCs (0.20 µs conversion), two 12-bit DACs, seven rail-to-rail comparators, and four programmable-gain operational amplifiers. It integrates CAN 2.0B, USB 2.0 FS, five USART/UARTs, three SPIs (two with I2S), two I²C Fast Mode Plus interfaces, and 24-channel capacitive touch sensing - deployed in motor control and industrial sensor fusion systems.

For engineers reviewing the STM32F303VBT6TR datasheet, STM32F303VBT6TR pinout, STM32F303VBT6TR application, or STM32F303VBT6TR equivalent, key selection considerations include analog peripheral supply ranges (VDDA: 2.0–3.6 V; VREFOPAMP: 2.4–3.6 V), 5 V-tolerant I/O count (up to 87), CCM SRAM booster (8 KB), and LQFP100 package thermal performance (θ_JA = 39 °C/W).

Technical Context

This MCU implements a tightly coupled interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals without bus contention. Its analog subsystem includes independent voltage domains: VDDA powers ADCs, DACs, comparators, and OPAMPs, while VREFOPAMP supplies internal op-amp reference - all requiring separate 2.4–3.6 V regulation for full 12-bit linearity.

The timer architecture combines three advanced-control timers (TIM1/TIM8/TIM15) supporting 6-channel PWM with deadtime insertion and emergency stop, plus two basic timers (TIM6/TIM7) dedicated to DAC triggering - enabling synchronized analog waveform generation and real-time motor phase control.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), 100-pin quad flat leaded with exposed thermal pad. Pin mapping validated per STMicroelectronics DS9118 Rev 14 Section 4 (Pinouts and pin description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303VBT6TR, the STM32F303RCT6 trades package size and USB capability for higher memory density in compact layouts, while the STM32F411CEU6 offers greater processing headroom at the expense of on-chip analog functionality - making the VBT6TR optimal for cost-sensitive, analog-rich embedded control.

Availability

STM32F303VBT6TR is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, automotive body electronics, and smart home touch interfaces requiring stable component supply across multi-year production cycles.

Supply support for STM32F303VBT6TR 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 chips for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications - combining high-precision mixed-signal peripherals with real-time Cortex-M4 performance for motor control, digital power, and human-machine interface systems.

FAQ

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

The STM32F303VBT6TR achieves 72 MHz CPU operation with VDD and VDDA supplied between 2.0 V and 3.6 V. At 72 MHz, typical active current consumption is 120 mA (VDD = 3.3 V, code from Flash), and the internal 8 MHz RC oscillator must be multiplied via PLL. Full-speed USB operation requires VDD ≥ 2.7 V and precise 48 MHz clock derived from PLL.

Does this MCU support hardware cryptographic acceleration?

No, the STM32F303VBT6TR does not include hardware cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For secure boot or TLS offload, designers should consider the STM32L4+ or STM32H7 series, which integrate dedicated crypto processors and TRNG.

How many independent analog supply domains does it have, and what are their voltage constraints?

The device has two independent analog domains: VDDA (2.0–3.6 V) powers ADCs, DACs, comparators, and OPAMPs; VREFOPAMP (2.4–3.6 V) supplies the internal op-amp reference. VDDA must be ≥ VDD and stable within ±2% for 12-bit ADC/DAC accuracy. External decoupling (100 nF + 4.7 µF) is mandatory per datasheet Section 6.3.4.

Can the built-in operational amplifiers be configured as instrumentation amplifiers?

Yes - each of the four OPAMPs can be configured in programmable-gain amplifier (PGA) mode with gains of 1, 2, 4, 8, 16, or 32, using internal resistors. While not a true 3-op-amp instrumentation amplifier, cascading two PGAs with external precision resistors enables high-CMRR differential gain stages - validated in ST Application Note AN4693 for sensor signal conditioning.