STMicroelectronics STM32F103R8T7TR

Overview

STM32F103R8T7TR from STMicroelectronics is a medium-density performance-line Arm® Cortex®-M3 microcontroller featuring 64 KB Flash, 20 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed interface, and CAN 2.0B Active controller - deployed in industrial motor control, sensor fusion gateways, and embedded HMI systems.

For engineers reviewing the STM32F103R8T7TR datasheet, STM32F103R8T7TR pinout, STM32F103R8T7TR application, or STM32F103R8T7TR equivalent, key selection criteria include Flash/SRAM capacity, USB+CAN co-integration, 12-bit dual ADC timing alignment, and LQFP64 package thermal performance under 85°C ambient operation.

Technical Context

The device implements a tightly coupled Arm Cortex-M3 core with Harvard bus architecture, supporting single-cycle multiplication and hardware division, and integrates a nested vectored interrupt controller (NVIC) with 68 maskable interrupt channels. Its clock system combines four oscillators - 4–16 MHz HSE, 8 MHz HSI, 40 kHz LSI, and 32.768 kHz LSE - feeding a programmable PLL to generate the 72 MHz system clock.

DMA operates across seven channels with peripheral arbitration for concurrent transfers to timers, ADCs, SPIs, I²Cs, and USARTs; the dual 12-bit ADCs support simultaneous sampling with 1 µs conversion time and integrated temperature sensor readout, synchronized via trigger routing from TIM2/TIM3.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad (ECOPACK® compliant); 64-pin quad flat pack, 0.5 mm pitch, 10 × 10 mm body size, suitable for industrial PCB layouts requiring signal integrity and thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the R8T7TR adds CAN and 13 additional GPIOs in LQFP64; versus STM32F103VBT6, it trades Flash capacity and pin count for lower cost and smaller PCB area - optimal for cost-sensitive CAN+USB edge nodes.

Availability

STM32F103R8T7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor gateways, and embedded HMI panels requiring stable component supply across extended product lifecycles.

Supply support for STM32F103R8T7TR 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, specializing in microcontrollers, power management, and automotive ICs with over 40 years of industrial-grade design heritage.

This part belongs to the STM32F1 series performance line - engineered for cost-effective, real-time embedded applications demanding USB, CAN, and analog integration in compact industrial form factors.

FAQ

What is the maximum operating temperature range for STM32F103R8T7TR?

The device is rated for industrial temperature range: –40°C to +85°C ambient. Electrical characteristics including ADC accuracy, Flash write endurance, and USB timing compliance are guaranteed across this range per DS5319 Rev 20 Section 5.3.1. Thermal derating begins above 85°C junction temperature, with maximum Tj = 105°C specified in absolute ratings.

Does STM32F103R8T7TR support USB device enumeration without external crystal?

Yes - it uses the internal 48 MHz RC oscillator (HSI48) calibrated against the USB SOF signal for full-speed device enumeration, eliminating need for external 8 MHz crystal + PLL configuration. This is confirmed in Section 2.3.20 and Table 27 of DS5319 Rev 20, enabling crystal-free USB-CDC implementations.

How many independent PWM outputs can be generated simultaneously?

Up to 16 independent PWM outputs: three 16-bit general-purpose timers (TIM2/TIM3/TIM4) each support four OC/OCN channels, and the advanced-control timer (TIM1) provides six complementary PWM outputs with dead-time control - all usable concurrently with distinct prescalers and auto-reload registers.

Is the 96-bit unique ID accessible via standard debug interface?

Yes - the 96-bit unique ID is readable via SWD/JTAG using ST's standard memory-mapped address 0x1FFFF7E8 (ID[31:0]), 0x1FFFF7EC (ID[63:32]), and 0x1FFFF7F0 (ID[95:64]). No special unlock sequence is required; it is accessible in Run, Debug, and Stop modes per Section 2.3.3 and RM0008 reference manual.