STMicroelectronics STM32F103R8H6TR

Overview

STM32F103R8H6TR 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 support. It integrates dual 12-bit ADCs (1 µs conversion), seven timers including motor-control PWM with dead-time generation, and operates across 2.0–3.6 V supply for industrial sensor node control.

For engineers reviewing the STM32F103R8H6TR datasheet, STM32F103R8H6TR pinout, STM32F103R8H6TR application, or STM32F103R8H6TR equivalent, key selection criteria include Flash size vs. peripheral count trade-offs, LQFP64 package compatibility, USB/CAN coexistence in embedded gateways, and 72 MHz real-time deterministic timing for motor feedback loops.

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. Its clock system includes 4–16 MHz HSE crystal oscillator, 8 MHz factory-trimmed HSI RC, 40 kHz LSI RC, and PLL for scalable 72 MHz system clock.

DMA supports 7 channels servicing timers, ADC, SPI, I²C, and USART peripherals concurrently; low-power modes (Sleep/Stop/Standby) integrate VBAT-supplied RTC and backup registers. The 12-bit ADC features dual-sample-and-hold, temperature sensor input, and 0–3.6 V conversion range with ±1 LSB INL.

Key Specifications

Pinout & Package

STM32F103R8H6TR is housed in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per ST's DS5319 Rev 20 Figure 6 (LQFP64 pinout) and Table 5 (pin definitions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the R8H6TR delivers 13 extra GPIOs and one additional USART in LQFP64 - ideal for mid-complexity industrial nodes. Versus STM32F103V8T6, it trades pin count and dual-CAN for lower cost and smaller footprint, targeting cost-sensitive applications without extreme I/O demands.

Availability

STM32F103R8H6TR is available at Aetrix Electronics and suitable for industrial motor control, smart energy gateways, medical diagnostic sensor nodes, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for STM32F103R8H6TR 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 devices since 1987.

The STM32F103x8 product line targets cost-sensitive, high-reliability embedded applications demanding USB/CAN connectivity, real-time control, and industrial temperature range (–40°C to +85°C) operation.

FAQ

What is the maximum operating frequency and Flash endurance specification?

The STM32F103R8H6TR achieves 72 MHz CPU frequency with zero wait states on Flash execution. Its 64 KB Flash supports 10,000 write/erase cycles minimum and 20-year data retention at 85°C - verified per ST's DS5319 Rev 20 Section 5.3.9 and Table 29. This enables robust firmware updates in field-deployed equipment.

Does this MCU support USB device mode without external components?

Yes - the integrated USB 2.0 full-speed transceiver uses PA11 (D−) and PA12 (D+) with internal pull-up on PA12. No external PHY or resistors are required beyond standard 1.5 kΩ pull-up on PA12 for device enumeration, as confirmed in DS5319 Rev 20 Section 2.3.20 and Figure 10.

How many ADC channels can be used simultaneously with hardware synchronization?

Both 12-bit ADCs (ADC1 and ADC2) support dual-mode operation: simultaneous sampling on up to 16 shared channels with hardware-triggered start. This is implemented via ADC1's master/slave configuration and validated in DS5319 Rev 20 Section 2.3.22 and Table 47.

Is the LQFP64 package RoHS-compliant and lead-free?

Yes - the STM32F103R8H6TR carries ECOPACK® certification (ST's eco-design standard), meeting RoHS Directive 2011/65/EU and containing <1000 ppm bromine/chlorine. Its LQFP64 package uses lead-free matte tin plating and qualifies for Pb-free reflow profiles (J-STD-020D), per DS5319 Rev 20 Section 1 and Table 1.