STMicroelectronics STM32F103RDT6TR

Overview

STM32F103RDT6TR from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 384 KB Flash, 64 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed interface, and CAN 2.0B controller. It integrates three 12-bit ADCs (21 channels), two 12-bit DACs, 11 timers including motor-control PWM units with dead-time generation, and supports industrial motor control, PLC I/O modules, and USB-CAN gateway designs.

For engineers reviewing the STM32F103RDT6TR datasheet, STM32F103RDT6TR pinout, STM32F103RDT6TR application, or STM32F103RDT6TR equivalent, key selection criteria include Flash/SRAM capacity, USB+CAN dual-interface capability, LQFP64 package compatibility, and support for real-time motor control with quadrature encoder input and emergency stop functionality.

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 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.

Clock management integrates four oscillators: 4–16 MHz HSE crystal, 8 MHz factory-trimmed HSI RC, 40 kHz LSI RC, and 32.768 kHz LSE RTC oscillator - all feeding a programmable PLL that delivers 72 MHz system clock with ±1% stability over temperature and voltage.

Key Specifications

Pinout & Package

LQFP64 package: 10 × 10 mm body, 0.5 mm lead pitch, 64 leads, exposed thermal pad (EP), RoHS-compliant, ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103VCT6, the RDT6TR trades I/O count and memory for compact LQFP64 packaging and lower unit cost; versus STM32F103C8T6, it adds essential industrial connectivity (USB+CAN) and doubles Flash/SRAM - making it optimal for mid-tier embedded gateways and motor drives.

Availability

STM32F103RDT6TR is available at Aetrix Electronics and suitable for industrial motor control, USB-CAN bridge devices, and programmable logic controller I/O modules requiring stable component supply across multi-year production cycles.

Supply support for STM32F103RDT6TR 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 products for industrial, automotive, and consumer markets.

The STM32F103 series belongs to ST's mainstream Cortex-M3 portfolio, engineered specifically for cost-sensitive, high-reliability embedded applications demanding rich peripheral integration, deterministic real-time performance, and long-term supply assurance.

FAQ

What is the maximum operating temperature range for STM32F103RDT6TR?

The STM32F103RDT6TR is rated for industrial temperature operation from –40 °C to +85 °C. This range is validated per ST's specification document DS5792 Rev 13, Section 5.3.1, and applies to all electrical characteristics including Flash programming, ADC accuracy, and USB timing compliance under full load conditions.

Does STM32F103RDT6TR support external memory expansion?

Yes, it integrates a Flexible Static Memory Controller (FSMC) supporting NOR, PSRAM, NAND, and CompactFlash memories with configurable read/write timings. Pin assignments for FSMC signals (e.g., NE1, NOE, NWE, A0–A25, D0–D15) are defined in Table 5 of DS5792 Rev 13 and mapped to specific GPIOs in LQFP64 package.

Can STM32F103RDT6TR run USB and CAN simultaneously without resource conflict?

Yes - USB and CAN operate independently using separate APB1 clock domains and dedicated DMA channels. The reference manual RM0008 confirms concurrent operation with no shared registers or timing dependencies, enabling simultaneous USB CDC ACM and CAN 2.0B frame transmission at full rates.

Is the internal 8 MHz RC oscillator factory-trimmed for accuracy?

Yes, the internal 8 MHz HSI oscillator is factory-trimmed to ±1% accuracy at 25 °C and 3.3 V, with typical drift of ±2% over the full –40 °C to +85 °C range. Calibration data is stored in system memory and accessible via RCC_HSICALIBRATION_DEFAULT register per Section 5.3.7 of DS5792 Rev 13.