STMicroelectronics STM32F103R6H6A

Overview

STM32F103R6H6A from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller featuring 32 KB Flash, 10 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed and CAN 2.0B interfaces, and dual 12-bit ADCs - deployed in industrial motor control, sensor fusion gateways, and USB-C peripheral hubs.

For engineers reviewing the STM32F103R6H6A datasheet, STM32F103R6H6A pinout, STM32F103R6H6A application, or STM32F103R6H6A equivalent, key selection criteria include Flash/SRAM capacity, USB+CAN co-integration, LQFP48 package compatibility, and 72 MHz deterministic real-time execution with SWD debug support.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiplication, hardware division, and nested vectored interrupt controller (NVIC) supporting up to 60 interrupts. Its clock system integrates dual oscillators (4–16 MHz HSE + 32 kHz LSE), PLL for 72 MHz system clock, and independent 40 kHz LSI for RTC backup.

DMA supports 7 channels servicing timers, ADC, SPI, I²C, and USART peripherals concurrently; GPIOs include 51 fast I/Os - 37 of which are available on the LQFP48 variant - with 5 V-tolerant capability on most pins and mapping to 16 external interrupt vectors.

Key Specifications

Pinout & Package

LQFP48 package with 0.5 mm pitch, 7 × 7 mm body, ECOPACK®-compliant lead-free finish, and standard JEDEC moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072RBT6, the STM32F103R6H6A delivers CAN+USB coexistence and deterministic 72 MHz timing critical for automotive diagnostics; versus STM32F103C8T6, it trades Flash/SRAM capacity for cost-sensitive volume production where 32 KB suffices.

Availability

STM32F103R6H6A is available at Aetrix Electronics and suitable for industrial motor control, USB-C peripheral hubs, and smart sensor gateways requiring stable component supply across extended product lifecycles.

Supply support for STM32F103R6H6A 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32F103x6 series targets cost-sensitive, high-reliability embedded applications demanding USB, CAN, and real-time control - optimized for rapid development with HAL libraries and STM32CubeMX toolchain integration.

FAQ

What is the maximum operating temperature range for STM32F103R6H6A?

The STM32F103R6H6A is rated for industrial temperature range: –40°C to +85°C ambient. This is validated per ST's qualification standards and applies to all LQFP48 variants in the STM32F103x6 family. Thermal derating curves confirm stable operation up to 85°C junction temperature under typical PCB copper pour conditions.

Does STM32F103R6H6A support USB device mode without external PHY?

Yes - it integrates a full-speed USB 2.0 device transceiver with internal pull-up resistors and differential signaling circuitry. No external PHY is required; only standard USB termination (15 kΩ pull-down on D+, 1.5 kΩ pull-up on D−) and ESD protection diodes are needed for compliance.

How many GPIO pins are accessible in the LQFP48 package?

The LQFP48 package provides 37 general-purpose I/O pins (PA0–PA15, PB0–PB15, PC13–PC15), all configurable as digital inputs/outputs, alternate functions, or external interrupts. Two pins (PC14/PC15) are reserved for the 32.768 kHz crystal oscillator and cannot be used as GPIOs.

Is the internal 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 temperature and voltage range. For USB or CAN timing-critical applications, ST recommends using the external 4–16 MHz crystal oscillator instead.