STM32F103R4T6A - 72MHz Cortex-M3 16KB MCU | STMicroelectronics
部品番号: STM32F103R4T6A ✓ 生産中STM32F103R4T6A 概要
A microcontroller is a programmable semiconductor that integrates a processor core, memory, peripheral interfaces, and control logic into one device. The STM32F103 family combines an ARM Cortex-M3 CPU with Flash memory, SRAM, timers, communication peripherals, and analog conversion resources. This integration lets an embedded product execute application firmware, acquire sensor data, control outputs, and exchange information without requiring several separate devices.
The STM32F103R4T6A provides 16 KB of Flash memory and operates at up to 72 MHz. Its documented feature set includes USB, CAN, six timers, two ADCs, and six communication interfaces. These resources support designs that need moderate processing performance and multiple peripheral functions within a constrained board area. The 64-pin LQFP package also exposes a comparatively broad set of GPIO and interface options.
The ARM Cortex-M3 core uses a 32-bit RISC architecture and is designed for efficient real-time control. Its instruction set supports interrupt-driven operation, while the STM32 peripheral set connects timers to motor-control and timing tasks, ADCs to analog measurement, and serial interfaces to communications networks. The 1.25 DMIPS/MHz performance figure quoted for the STM32F103 family illustrates its processing efficiency, although final application performance depends on firmware and system configuration.
Typical uses include USB-connected data acquisition, CAN-based industrial or automotive equipment, motor-control systems, sensor nodes, and compact embedded controllers. The two ADCs support analog measurement, the timers support precise event and waveform generation, and USB or CAN provides a path for data exchange. Firmware and peripheral configuration must be checked against the selected device variant because STM32 families can contain parts with different memory capacities and feature combinations.
Place decoupling capacitors close to the power and ground pins, preserve the manufacturer's recommended clock and reset arrangements, and route high-frequency or sensitive analog signals away from switching nodes. Because the exact pin assignments and electrical limits are defined by the manufacturer documentation, use the STM32F103x4 reference manual and pin-description tables when assigning PCB tracks.
This product page combines the exact STM32F103R4T6A identity, memory, frequency, package, interface, and lifecycle information with sourcing guidance, documented drop-in candidates, comparison criteria, and practical embedded-design considerations. Request current availability, lead time, and commercial terms through the Request a Quote form on this page.
ドロップイン代替品: STM32F103R4T6A — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: STM32F103R4T6A （同一形状・フットプリント） — 相違点: Flash Memory, Package, Product Type, RoHS Status, Core Architecture.
STM32F103R4T6
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STM32F103R6T6A
✅ ドロップイン価格はお問い合わせください
データシートを見る →STM32F103R6T6
✅ ドロップイン価格はお問い合わせください
データシートを見る →STM32F103R6H6A
✅ ドロップイン価格はお問い合わせください
データシートを見る →GD32F103R4T6
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STM32F103R4T6A 最大定格＆電気的特性
| Product Type | 32-bit ARM Cortex-M3 microcontroller |
| Maximum CPU Frequency | 72 MHz |
| Flash Memory | 16 KB (16K x 8) |
| Core Architecture | ARM 32-bit RISC |
| Performance | 1.25 DMIPS/MHz |
| 電源電圧 | 2 V to 3.6 V |
| I/O Ports | 37 |
| ADC Count | 2 |
| Timer Count | 6 |
| Communication Interface Count | 6 |
| USB Interface | Yes |
| CAN Interface | Yes |
| Package Type | 64-pin LQFP, 7 mm x 7 mm, 0.5 mm pitch |
| 実装タイプ | Surface mount |
| RoHS ステータス | Compliant |
| ライフサイクル状態 | Active |
STM32F103R4T6A 64-pin lqfp, 7 mm x 7 mm, 0.5 mm pitch ピン配置ガイド
STM32F103R4T6A (64-pin lqfp, 7 mm x 7 mm, 0.5 mm pitch パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: STM32F103R4T6A.
詳細は データシート をご参照ください。
主な用途
STM32F103R4T6A の用途: 6 件s: USB Data-Acquisition Controller, CAN-Based Industrial Controller, Brushless Motor Controller, Sensor and IoT Edge Node, Digital Control and Signal Conditioning, Human-Machine Interface Controller.
USB Data-Acquisition Controller
The STM32F103R4T6A fits compact USB data-acquisition equipment because its STM32F103x4 feature set includes USB, two ADCs, six timers, and six communication interfaces. The 72 MHz Cortex-M3 core can coordinate sampling, filtering, control, and host transfers, while 16 KB of Flash provides a defined firmware budget. Place the MCU between the sensors and USB connector, configure the ADC channels for the required signal range, and validate conversion timing against the application bandwidth. Because memory is limited to 16 KB, organize code and buffers carefully; the R6 family provides 32 KB when additional program space is required. USB firmware development should follow the STMicroelectronics peripheral and low-power guidance, and final EMC and signal-integrity testing must be performed on the assembled board.
おすすめ
CAN-Based Industrial Controller
The STM32F103R4T6A is appropriate for industrial nodes that exchange data over CAN while performing local control. Its documented CAN support, 37 I/O ports, six timers, two ADCs, and 72 MHz processing rate support sensor acquisition, actuator sequencing, diagnostics, and communication handling in one device. A practical implementation places the MCU beside the CAN transceiver, uses timers for deterministic scheduling, and reserves GPIO for isolated inputs and outputs. The 16 KB Flash limit may constrain protocol stacks, logging, and application code, so estimate the final image size before committing to this variant. Validate bit timing, bus protection, grounding, and fault behavior under industrial transients. For designs that need additional program space, an STM32F103R6 device doubles Flash to 32 KB while retaining the same general low-density performance-line architecture.
おすすめ
Brushless Motor Controller
The STM32F103R4T6A can serve as the control processor in a compact brushless motor controller because its Cortex-M3 core runs at up to 72 MHz and the family provides six timers, two ADCs, and 37 I/O ports. Timers can generate complementary PWM and commutation timing, while ADC channels can sample rotor position or phase current. The implementation should allocate timers and DMA resources before adding application logic, protect control-loop timing from noncritical interrupts, and include sensorless-start or hall-sensor logic appropriate to the motor. Keep analog front ends and switching power stages separated on the PCB to limit noise coupling into ADC measurements. The 16 KB Flash capacity leaves limited room for complex algorithms or extensive diagnostics. Confirm gate-drive timing, dead time, current limits, overcurrent response, and thermal performance across the complete motor and supply operating range.
おすすめ
Sensor and IoT Edge Node
The STM32F103R4T6A is well matched to a compact sensor node that must acquire measurements, apply local control, and transmit results. Its 37 I/O ports provide connections for digital sensors and actuators, while two ADCs support analog inputs and six timers help establish periodic sampling or output timing. With a 72 MHz Cortex-M3 core and 16 KB of Flash, it is suitable for focused edge functions rather than elaborate gateways or high-volume data processing. Designers should minimize blocking operations, use interrupt-driven serial communication, and balance processing demand against the device's memory limit. Select an appropriate communication peripheral from the six available interfaces and confirm its multiplexed pin assignment in the manufacturer documentation. Prototype the full power, sensing, and radio subsystem together because grounding, antenna coupling, and regulator noise can materially change the usable measurement accuracy.
おすすめ
Digital Control and Signal Conditioning
The STM32F103R4T6A can implement digital control loops, signal conditioning, and timing functions where deterministic peripheral action is more important than very large program storage. The 72 MHz Cortex-M3 core, six timers, two ADCs, and communication interfaces allow a single controller to sample an analog condition, calculate a response, and update an actuator or report status. Use timer synchronization for repeatable sampling and control intervals, and place analog input traces away from digital switching activity to preserve signal quality. Firmware organization should keep time-critical routines short and place noncritical logging outside interrupt context. The 16 KB Flash capacity is sufficient for focused control logic but may not suit large protocol stacks or complex algorithms. Validate numerical scaling, update latency, saturation behavior, and output settling across temperature and supply-voltage corners before releasing the design for production.
おすすめ
Human-Machine Interface Controller
The STM32F103R4T6A can serve as the central controller in a compact human-machine interface that combines display updating, input handling, status indication, and serial communications. Its 37 I/O ports support multiple digital controls, and its six timers support display or interface timing while the 72 MHz core handles event processing. The two ADCs can also monitor analog controls or panel conditions. Because the device has only 16 KB of Flash, graphics should remain simple and third-party middleware should be selected carefully; an R6 variant offers 32 KB when code growth is expected. Use debouncing and interrupt priorities for physical buttons, and separate display and touch signals from switching regulators to reduce display noise. Verify panel timing, electrical levels, startup behavior, and firmware update procedures in the complete product rather than treating the MCU datasheet as a complete HMI specification.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: STM32F103R4T6A — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | STM32F103R4T6 | STM32F103R6T6A | STM32F103R6T6 | STM32F103R6H6A | GD32F103R4T6 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP, 7 mm x 7 mm, 0.5 mm pitch | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Maximum CPU Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 108 MHz |
| CPU Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
主な差別化要因
- Exact 16 KB configuration with a 72 MHz Cortex-M3 core （vs STM32F103R6T6A)
- STMicroelectronics family continuity （vs GD32F103R4T6)
- Complete 64-pin interface exposure （vs STM32F103R4T6)
設計ノート
Design the 2 V to 3.6 V supply rail with the voltage range appropriate for all operating modes, including USB-connected operation. Place the required local decoupling capacitors immediately beside the corresponding power and ground pins, use a low-impedance ground plane, and separate noisy switching-node returns from analog and digital signal returns. Check the manufacturer power-up requirements before adding USB attachment, because the valid voltage and sequencing conditions can differ between operating states.
Use the manufacturer LQFP-64 footprint and pin-description table to assign every track; pin multiplexing can change the function of a physical pin without changing the package. Keep USB and other high-speed communication routes short, continuous, and away from antenna or switching regions. Provide a clean clock path, observe oscillator layout guidance, and route sensitive analog inputs away from digital outputs and power-conversion components to reduce coupling into the two ADC channels.
Do not select an R6 replacement solely because it has a larger footprint-compatible package: its 32 KB Flash is 100% greater than the target's 16 KB and may alter linker placement, bootloader assumptions, or timing. Likewise, GD32F103R4T6 runs up to 108 MHz rather than 72 MHz. Recheck flash wait states, startup code, peripheral behavior, driver libraries, and firmware timing whenever the exact MCU or clock configuration changes.
Treat ADC inputs, oscillator signals, reset, and communication interfaces according to the application rather than routing every signal as a generic digital net. For CAN and USB, complete the recommended transceiver or connector interface and verify edge rates, return paths, impedance, and protection on the assembled board. For motor or power-control designs, separate high-current switching paths from the MCU and ADC ground references and test signal integrity under the highest switching condition rather than only at idle.
コンプライアンス情報
The available component specification identifies STM32F103R4T6A as RoHS compliant. No separate REACH, halogen-free, lead-free, conflict-minerals, or automotive-qualification statement was identified for this exact MPN.
