STMicroelectronics STM32F103T4U6A

Overview

STM32F103T4U6A from STMicroelectronics is a low-density ARM Cortex-M3 microcontroller in VFQFPN36 package, featuring 16 KB Flash, 6 KB SRAM, 72 MHz CPU, USB 2.0 full-speed interface, CAN 2.0B controller, and dual 12-bit ADCs - deployed in industrial sensor nodes requiring real-time control, communication, and analog signal acquisition.

For engineers reviewing the STM32F103T4U6A datasheet, STM32F103T4U6A pinout, STM32F103T4U6A application, or STM32F103T4U6A equivalent, key selection criteria include Flash/SRAM size, USB+CAN co-integration, VFQFPN36 footprint constraints, 72 MHz deterministic timing, and 12-bit ADC channel count with temperature sensor support.

Technical Context

The device implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 68 interrupts. It integrates a programmable voltage detector (PVD), 4–16 MHz HSE oscillator, 8 MHz factory-trimmed HSI RC, and 40 kHz LSI RC for RTC.

Clock management includes a PLL with input pre-divider and multiplier stages enabling precise 72 MHz system clock derivation from external crystals or internal RC sources. The reset subsystem combines POR, PDR, and configurable brown-out detection with dedicated NRST pin handling.

Key Specifications

Pinout & Package

VFQFPN36 (6 × 6 mm, 0.5 mm pitch) package with exposed thermal pad; 36-pin layout optimized for space-constrained industrial PCBs and thermal dissipation in sealed enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103T6U6A, the T4U6A trades Flash/SRAM headroom for identical peripheral set and footprint - ideal for fixed-function deployments with verified memory usage. Against STM32F030F4P6, it delivers higher determinism, dual high-speed interfaces, and richer analog capability at modest cost premium.

Availability

STM32F103T4U6A is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control edge devices, USB-capable diagnostic tools, and low-power environmental monitors requiring stable component supply across multi-year production cycles.

Supply support for STM32F103T4U6A 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32F103x4/x6 series targets cost-sensitive, space-constrained embedded applications demanding USB connectivity, CAN bus integration, and real-time analog processing - emphasizing production readiness and long-term supply stability.

FAQ

What is the maximum operating frequency and associated power consumption of STM32F103T4U6A?

The STM32F103T4U6A operates at up to 72 MHz with typical active current of 29 mA at 3.6 V and 72 MHz (code from Flash, peripherals enabled). At 8 MHz, consumption drops to ~10 mA under same conditions. Full electrical characteristics, including temperature-dependent curves, are specified in Section 5.3.5 of the official datasheet (DocID15060 Rev 7).

Does STM32F103T4U6A support USB device mode without external components?

Yes - it integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on PA11/PA12. No external PHY or termination resistors are required for basic USB device operation (e.g., CDC ACM, HID). External ESD protection diodes are recommended for robustness in industrial environments per Section 5.3.20.

How many ADC channels are accessible in the VFQFPN36 package, and what is their sampling rate?

The VFQFPN36 package exposes 10 ADC input channels (PA0–PA7, PB0–PB1) across ADC1 and ADC2. Each 12-bit converter achieves 1 µs conversion time (1 MSPS) with configurable resolution and alignment. Dual-sample-and-hold capability allows synchronized sampling of two channels for phase-critical measurements.

Is the STM32F103T4U6A pin-compatible with other STM32F103 variants in VFQFPN36?

Yes - all STM32F103x4/x6 devices in VFQFPN36 (e.g., STM32F103T4U6A, STM32F103T6U6A) share identical pinouts and electrical characteristics. Firmware and PCB designs are interchangeable; only Flash/SRAM size and some peripheral enable bits differ - verified in Table 5 (Pin Definitions) and Section 2.2 of the datasheet.