STMicroelectronics STM32F103RDT6

Overview

STM32F103RDT6 from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 72 MHz operation, 384 KB Flash, 64 KB SRAM, USB 2.0 full-speed interface, CAN 2.0B controller, and three 12-bit ADCs with up to 21 channels - deployed in industrial motor control systems requiring real-time PWM generation, analog sensing, and fieldbus connectivity.

For engineers reviewing the STM32F103RDT6 datasheet, STM32F103RDT6 pinout, STM32F103RDT6 application, or STM32F103RDT6 equivalent, key selection criteria include Flash/SRAM capacity, USB+CAN coexistence, 51 GPIO count with 5 V tolerance, and LQFP64 package compatibility for cost-sensitive PCB layouts.

Technical Context

The STM32F103RDT6 implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiply, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 60 maskable interrupts. Its memory subsystem includes 384 KB of embedded Flash with error correction and 64 KB of SRAM with bit-band aliasing for atomic peripheral access.

Peripherals are tightly coupled via AHB/APB buses: USB and CAN share dedicated DMA channels; dual 12-bit DACs support synchronized waveform generation; and the FSMC enables external NOR/PSRAM expansion - all synchronized to a flexible clock tree with PLL, HSE (4–16 MHz), HSI (8 MHz), and LSE (32.768 kHz) sources.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified - optimized for manual soldering and automated reflow in industrial-grade assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the RDT6 adds 320 KB Flash and FSMC for firmware flexibility and external memory; versus VET6, it trades 32 GPIO and 24 pins for lower cost and smaller footprint - making it optimal for mid-tier industrial nodes balancing capability and layout constraints.

Availability

STM32F103RDT6 is available at Aetrix Electronics and suitable for industrial motor control, USB-connected field devices, and automotive body electronics requiring stable component supply across extended product lifecycles.

Supply support for STM32F103RDT6 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 automotive-grade components since 1987.

The STM32F1 series targets cost-sensitive, high-reliability embedded applications in industrial automation and consumer electronics - emphasizing Flash density, analog integration, and toolchain maturity for rapid development.

FAQ

What is the maximum operating temperature range for STM32F103RDT6?

The STM32F103RDT6 is rated for industrial temperature range: –40°C to +85°C ambient. This is confirmed in Section 5.3.1 of DS5792 Rev 13, with thermal derating applied above 70°C for sustained 72 MHz operation. The part uses standard LQFP64 packaging with θ_JA = 46°C/W per Table 74.

Does STM32F103RDT6 support USB device mode without external components?

Yes - the part integrates a full-speed USB 2.0 transceiver with internal pull-up resistor control on PA12 (USB_DP). Only two 22 Ω series resistors and a 1.5 kΩ pull-up on DP (enabled via software) are required per Section 2.3.24 and Figure 227 in the datasheet. No external PHY or crystal is needed.

How many CAN message objects does the integrated CAN controller support?

The STM32F103RDT6's bxCAN controller supports 14 mailboxes (3 dedicated transmit, 2 dedicated receive, 9 FIFO-based receive) with programmable identifier masking. This is specified in Section 2.3.23 and Table 58 of DS5792 Rev 13, enabling robust filtering for up to 14 distinct CAN IDs in automotive or industrial networks.

Can the internal 8 MHz RC oscillator be used as system clock source without calibration?

Yes - the HSI RC oscillator runs at 8 MHz ±1% over temperature and voltage, factory-trimmed to ±0.5% at 25°C. It is fully usable as system clock source for boot or low-power modes, though PLL lock requires external crystal for 72 MHz operation. Calibration is optional and performed via RCC_CR register per Section 2.3.9.