STMicroelectronics STM32F103R6T7A

Overview

STM32F103R6T7A from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller featuring 32 KB Flash, 10 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B controller-designed for real-time industrial control and embedded connectivity applications.

For engineers reviewing the STM32F103R6T7A datasheet, STM32F103R6T7A pinout, STM32F103R6T7A application, or STM32F103R6T7A equivalent, key selection considerations include Flash/SRAM capacity, USB/CAN coexistence, LQFP48 package compatibility, and 3.3 V operation with 5 V-tolerant I/Os.

Technical Context

The device integrates an ARM Cortex-M3 core with single-cycle multiplication, hardware division, and nested vectored interrupt controller (NVIC) supporting up to 64 interrupts. It implements a multi-source clock tree with PLL, 4–16 MHz HSE, 32 kHz LSE, and factory-trimmed 8 MHz HSI oscillator.

Peripheral subsystems include two 12-bit ADCs (1 µs conversion, 16-channel multiplexing), seven-channel DMA supporting USART/I2C/SPI/ADC/timers, and six communication interfaces: one I2C, two USARTs, one SPI, one CAN, and one USB full-speed transceiver.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; 48-pin quad flat lead frame optimized for reflow assembly and thermal dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C6T6, the R6T7A offers extended temperature range and same-footprint drop-in capability; versus STM32F103V8T6, it trades memory/peripheral headroom for compact LQFP48 layout and lower BOM cost in resource-constrained edge nodes.

Availability

STM32F103R6T7A is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, USB-CAN bridges, and PLC I/O modules requiring stable component supply across long-lifecycle deployments.

Supply support for STM32F103R6T7A 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32F103 series belongs to ST's foundational Cortex-M3 portfolio, engineered for cost-sensitive, real-time embedded applications demanding USB/CAN connectivity, analog integration, and industrial-grade reliability.

FAQ

What is the maximum operating temperature rating for STM32F103R6T7A?

The STM32F103R6T7A is specified for operation from –40 °C to +105 °C ambient temperature, validated per ST's industrial temperature grade qualification. This rating applies to the full LQFP48 package variant and is confirmed in Section 5.3.1 of the official datasheet (DocID15060 Rev 7). Thermal derating begins above 85 °C for sustained 72 MHz operation.

Does STM32F103R6T7A support USB device enumeration without external components?

Yes - the part integrates a full-speed USB 2.0 transceiver with internal pull-up resistor on PA12 (USB DP), enabling direct connection to a USB host without external PHY or termination. The internal 1.5 kΩ pull-up on PA12 meets USB specification requirements, and the device supports standard CDC, HID, and DFU class descriptors out of the box using ST's HAL library.

How many ADC channels can be used simultaneously on STM32F103R6T7A?

Two independent 12-bit ADCs (ADC1 and ADC2) support simultaneous sampling on up to 10 shared input channels (PA0–PA7, PB0–PB1). Dual-sample-and-hold capability allows synchronized acquisition-for example, measuring motor phase currents and DC bus voltage concurrently-with hardware-triggered start and DMA-driven result transfer to avoid CPU latency.

Is the STM32F103R6T7A pin-compatible with other STM32F103x6 variants in LQFP48?

Yes - all STM32F103x6 devices in LQFP48 (e.g., STM32F103C6T6, STM32F103R6T6, STM32F103R6T7A) share identical pinouts and electrical characteristics. The 'T7A' suffix denotes extended temperature grade (+105 °C) and tape-and-reel packaging; functionally, it is a direct replacement for 'T6' variants in existing LQFP48 footprints with no layout changes required.