STMicroelectronics STM32F103R6T6ATR

Overview

STM32F103R6T6ATR from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller with 32 KB Flash, 10 KB SRAM, and 72 MHz CPU frequency. It integrates USB 2.0 full-speed, CAN 2.0B, dual 12-bit ADCs (1 µs conversion), six timers including motor-control PWM, and 51 I/O pins in an LQFP64 package. It is used in industrial motor control systems requiring real-time PWM generation, CAN bus communication, and analog sensor interfacing.

For engineers reviewing the STM32F103R6T6ATR datasheet, STM32F103R6T6ATR pinout, STM32F103R6T6ATR application, or STM32F103R6T6ATR equivalent, key selection considerations include Flash size (32 KB), USB/CAN coexistence, 12-bit ADC resolution with temperature sensor, and LQFP64 thermal performance for embedded control designs.

Technical Context

The STM32F103R6T6ATR implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide, enabling deterministic real-time execution at 72 MHz. Its clock system includes dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), programmable PLL, and internal 8 MHz/40 kHz RC sources - supporting precise RTC calibration and flexible system timing.

Peripheral integration follows a tightly coupled memory-mapped architecture: DMA channels (7) serve ADC, timers, USARTs, SPI, and I²C; NVIC supports 68 interrupt vectors; and GPIOs feature remappable alternate functions across all 51 pins, with 5 V-tolerant capability on most inputs and configurable pull-up/pull-down.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK® construction; operating ambient temperature range: –40 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the STM32F103R6T6ATR offers identical peripheral set in LQFP64 with better thermal dissipation but less Flash; versus STM32F072RBT6, it delivers CAN + dual ADC + higher CPU performance critical for real-time motor control - making it the only option meeting full IEC 61800-3 functional safety pre-certification requirements in this density class.

Availability

STM32F103R6T6ATR is available at Aetrix Electronics and suitable for industrial motor control, building automation nodes, energy monitoring gateways, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for STM32F103R6T6ATR 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 automotive-grade components since 1987.

The STM32F103x6 series belongs to ST's mainstream Cortex-M3 portfolio, engineered specifically for cost-optimized industrial control applications demanding USB/CAN coexistence, analog signal processing, and deterministic real-time response.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32F103R6T6ATR operates at up to 72 MHz with typical active current of 36 mA at 3.3 V and 72 MHz (code from Flash, peripherals enabled). This value is measured under defined conditions per Section 5.3.5 of the datasheet and scales linearly with voltage and peripheral activation state.

Does this MCU support USB device functionality without external components?

Yes - the STM32F103R6T6ATR integrates a full-speed USB 2.0 transceiver with internal pull-up resistor control and descriptor handling. Only a single 1.5 kΩ pull-up on DP line and standard USB termination capacitors are required; no external PHY or level shifters are needed.

How many ADC channels can be sampled simultaneously, and what is the effective resolution?

Two independent 12-bit ADCs support simultaneous sampling on up to 16 channels total (ADC1: 16 channels; ADC2: 15 channels). When used in dual-regular simultaneous mode, effective resolution remains 12 bits with 1 µs conversion time per channel and <±1 LSB integral nonlinearity.

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

Yes - the STM32F103R6T6ATR uses ST's ECOPACK®-compliant LQFP64 package, fully lead-free and RoHS 2011/65/EU compliant. The device meets JEDEC J-STD-020 moisture sensitivity level 3 and supports standard reflow profiles up to 260 °C peak.