STM32F103C8T6TR - 72MHz Cortex-M3 MCU, 64KB Flash, LQFP-48 | STMicroelectronics (Tape & Reel)
部品番号: STM32F103C8T6TR ✓ 生産中STM32F103C8T6TR 概要
An ARM Cortex-M3 microcontroller (MCU) is a 32-bit RISC processor core designed by Arm Holdings for embedded applications requiring deterministic real-time performance at low power. The Cortex-M3 sits at the lower end of the Cortex-M family (above Cortex-M0/M0+ and below Cortex-M4/M7), and microcontrollers in this category combine the processor core with on-chip memory, peripherals, and analog blocks into a single system-on-chip. The STM32F103 family specifically belongs to the broader hierarchy: ARM Cortex-M3 -> 32-bit MCU -> STM32F1 series -> STM32 mainstream family -> STMicroelectronics microcontrollers -> semiconductor. This hierarchy matters because it determines the toolchain (Arm Cortex-M3 supports the standard Arm Keil, IAR, GCC, and STM32CubeIDE flows) and the peripheral programming model used across the STM32 platform.
Key features include 64 KB of embedded Flash with read-while-write capability, 20 KB of SRAM, a 2.0 V to 3.6 V supply range, an 8 MHz internal RC oscillator with PLL multiplier to 72 MHz, two 12-bit ADCs (1 µs conversion, up to 16 channels), seven 16-bit timers, and a full-speed USB 2.0 Full-Speed device/host/OTG controller. Communication peripherals include three USARTs, two SPIs (18 Mbit/s), two I2C buses (400 kHz), one CAN 2.0B interface, and one USB Full-Speed port. The 48-pin LQFP package exposes 37 GPIO pins tolerant to 5 V.
Architecturally, the Cortex-M3 core delivers 1.25 Dhrystone MIPS per MHz, supports the Thumb-2 instruction set, and includes a Nested Vectored Interrupt Controller (NVIC) with configurable priority and hardware stack handling. The integrated voltage regulator and brown-out reset (BOR) simplify power design, while the 4-byte backup register with a tamper-detection pin supports battery-backed RTC modes.
Typical applications include industrial control boards, motor drives (BLDC/PMSM FOC complements), USB HID/COM port devices, CAN-bus node interfaces, and low-cost development platforms such as the well-known "Blue Pill" board.
When designing with this device, place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VDDA pin pair, and reserve the NRST pin connection for a 10 kΩ pull-up and optional reset button. Ensure the BOOT0 pin state matches the desired boot memory on every power-up.
This page synthesizes distributor pricing, drop-in alternatives (same-brand STM32F103 variants first, then cross-brand pin-compatible parts), and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: STM32F103C8T6TR — 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: STM32F103C8T6TR （同一形状・フットプリント） — 相違点: ADC, CAN, Flash Memory, Operating Temperature, Package.
STM32F103C8T7
価格はお問い合わせください
データシートを見る →GD32F103C8T6
📋 参考代替品（カタログ未掲載）
APM32F103C8T6
📋 参考代替品（カタログ未掲載）
STM32F103C8T6TR 最大定格＆電気的特性
| Core Architecture | ARM Cortex-M3 (32-bit RISC) |
| 最大クロック周波数 | 72 MHz |
| Flash Memory | 64 KB |
| SRAM | 20 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| パッケージ | LQFP-48 (7x7 mm, 0.5 mm pitch) |
| GPIO Count | 37 |
| ADC | 2x 12-bit, 1 µs, up to 16 channels |
| Timers | 7x 16-bit (including 1x watchdog, 2x SysTick) |
| USART | 3 |
| SPI | 2 (18 Mbit/s) |
| I2C | 2 (400 kHz) |
| USB | 1x USB 2.0 Full-Speed device/host/OTG |
| CAN | 1x CAN 2.0B |
| 動作温度 | -40 °C to +85 °C (industrial grade) |
| RoHS ステータス | Compliant |
STM32F103C8T6TR ピン構成
| ピン 1 | VBAT — Backup battery supply input |
| ピン 2 | PC13 — GPIO PC13, anti-tamper (RTC) |
| ピン 3 | PC14 — GPIO PC14 / OSC32_IN |
| ピン 4 | PC15 — GPIO PC15 / OSC32_OUT |
| ピン 5 | OSC_IN — HSE oscillator input |
| ピン 6 | OSC_OUT — HSE oscillator output |
| ピン 7 | NRST — Reset input, active-low |
| ピン 8 | VSSA — Analog ground |
| ピン 9 | VDDA — Analog supply (2.4 V - 3.6 V) |
| ピン 10 | PA0 — GPIO PA0 / WKUP / ADC_IN0 / TIM2_CH1 |
| ピン 11 | PA1 — GPIO PA1 / ADC_IN1 / TIM2_CH2 |
| ピン 12 | PA2 — GPIO PA2 / USART2_TX / ADC_IN2 |
| ピン 13 | PA3 — GPIO PA3 / USART2_RX / ADC_IN3 |
| ピン 14 | PA4 — GPIO PA4 / SPI1_NSS / ADC_IN4 |
| ピン 15 | PA5 — GPIO PA5 / SPI1_SCK / ADC_IN5 |
| ピン 16 | PA6 — GPIO PA6 / SPI1_MISO / ADC_IN6 |
| ピン 17 | PA7 — GPIO PA7 / SPI1_MOSI / ADC_IN7 |
| ピン 18 | PB0 — GPIO PB0 / ADC_IN8 / TIM3_CH3 |
| ピン 19 | PB1 — GPIO PB1 / ADC_IN9 / TIM3_CH4 |
| ピン 20 | PB2 — GPIO PB2 / BOOT1 (also PB-BOOT input) |
| ピン 21 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX |
| ピン 22 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX |
| ピン 23 | VSS_1 — Digital ground |
| ピン 24 | VDD_1 — Digital supply (2.0 V - 3.6 V) |
| ピン 25 | PB12 — GPIO PB12 / SPI2_NSS / CAN2_RX |
| ピン 26 | PB13 — GPIO PB13 / SPI2_SCK / CAN2_TX / USB_DP pull-up |
| ピン 27 | PB14 — GPIO PB14 / SPI2_MISO |
| ピン 28 | PB15 — GPIO PB15 / SPI2_MOSI |
| ピン 29 | PA8 — GPIO PA8 / USART1_CK / TIM1_CH1 |
| ピン 30 | PA9 — GPIO PA9 / USART1_TX / TIM1_CH2 |
| ピン 31 | PA10 — GPIO PA10 / USART1_RX / TIM1_CH3 |
| ピン 32 | PA11 — GPIO PA11 / CAN1_RX / USBDM (USB data minus) |
| ピン 33 | PA12 — GPIO PA12 / CAN1_TX / USBDP (USB data plus) |
| ピン 34 | PA13 — GPIO PA13 / JTMS / SWDIO |
| ピン 35 | VSS_2 — Digital ground |
| ピン 36 | VDD_2 — Digital supply (2.0 V - 3.6 V) |
| ピン 37 | PA14 — GPIO PA14 / JTCK / SWCLK |
| ピン 38 | PA15 — GPIO PA15 / JTDI |
| ピン 39 | PB3 — GPIO PB3 / JTDO / TRACESWO |
| ピン 40 | PB4 — GPIO PB4 / JNTRST |
| ピン 41 | PB5 — GPIO PB5 / I2C1_SMBAI |
| ピン 42 | PB6 — GPIO PB6 / I2C1_SCL / TIM4_CH1 |
| ピン 43 | PB7 — GPIO PB7 / I2C1_SDA / TIM4_CH2 |
| ピン 44 | BOOT0 — Boot mode select (0 = Flash, 1 = System bootloader) |
| ピン 45 | PB8 — GPIO PB8 / TIM4_CH3 |
| ピン 46 | PB9 — GPIO PB9 / TIM4_CH4 |
| ピン 47 | VSS_3 — Digital ground |
| ピン 48 | VDD_3 — Digital supply (2.0 V - 3.6 V) |
主な用途
STM32F103C8T6TR の用途: 6 件s: Industrial Control Boards, USB HID / Virtual COM Port Devices, BLDC / PMSM Motor Drives, CAN-Bus Node Interface, Low-Cost Development Platforms ("Blue Pill"), IoT Sensor / Smart Home Edge Nodes.
Industrial Control Boards
The STM32F103C8T6TR fits industrial control boards because its 72 MHz Cortex-M3 core and 64 KB Flash comfortably handle Modbus RTU slave firmware, PID loop control, and user-interface logic on a single chip. The dual 12-bit ADCs (1 µs, up to 16 channels) sample 4-20 mA sensor inputs at the kHz rates typical of PLC analog modules, while the three USARTs (USART1/2/3) support simultaneous RS-232/RS-485 fieldbus and a debug console. The 2.0 V to 3.6 V supply range aligns with 3.3 V industrial backplanes, and the -40 °C to +85 °C operating temperature meets most cabinet-mounted equipment specs. On-board CAN 2.0B lets a single MCU handle both a sensor bus and an external CANopen master.
おすすめ
USB HID / Virtual COM Port Devices
The STM32F103C8T6TR's integrated USB 2.0 Full-Speed device controller (12 Mbit/s) makes it a natural fit for USB HID-class peripherals, virtual COM-port bridges, and CDC-MSC composite devices without external PHY hardware. The 72 MHz core and 20 KB SRAM execute the standard ST USB device library (and STM32CubeMX-generated middleware) with room left for application logic, while the 64 KB Flash fits typical HID report descriptors and command parsers. Its 2.0 V to 3.6 V rail tolerance lets designers tap the USB 5 V bus through an LDO and run the MCU from a single 3.3 V supply. Designers should add ESD protection (USBLC6-2SC6) and a 1.5 kΩ pull-up on the D+ line to the USB connector.
おすすめ
BLDC / PMSM Motor Drives
The STM32F103C8T6TR is widely used in sensorless or hall-sensored BLDC and PMSM motor drives for low- to mid-power applications (fans, pumps, e-bike hubs). Its 72 MHz Cortex-M3 plus advanced timers (TIM1 with complementary PWM and dead-time insertion) generate the 6-step or space-vector PWM that drives a 3-phase inverter at up to tens of kHz switching. The two ADCs trigger from timer events to sample phase currents within the PWM cycle for low-latency commutation, and the quadrature encoder interface on TIM2 supports sensored FOC firmware patterns. CAN bus readiness lets the drive communicate with a central PLC, while the 2.0-3.6 V range accepts a wide range of bus-powered motor-control supplies.
おすすめ
CAN-Bus Node Interface
The STM32F103C8T6TR is a battle-tested choice for CAN 2.0B node interfaces used in automotive body-electronics, industrial CANopen, and medical device buses. The bxCAN peripheral supports standard and extended frames with hardware filter banks and a 1 Mbit/s bit rate suitable for most fieldbus deployments. With 64 KB Flash the device holds small CANopen/CANFestival stacks and application logic, while three USARTs allow a companion GPS or HMI link. Operating temperature of -40 °C to +85 °C suits non-automotive nodes; designers needing AEC-Q100 should select the STM32F103C8T7 variant. Drop a 60 Ω termination resistor only on the bus ends and add a TJA1050 or TCAN332 transceiver externally.
おすすめ
Low-Cost Development Platforms ("Blue Pill")
The STM32F103C8T6TR is the headline MCU of the iconic "Blue Pill" development board that became the de-facto entry ticket to ARM Cortex-M3 firmware development. Its 72 MHz core, 64 KB Flash, SWD debug pins, USB connector, and 48-pin LQFP form factor fit on a 53 x 23 mm PCB with a USB micro-B port, a 3.3 V LDO, a reset button, and boot-mode jumpers. Students and hobbyists target it with STM32CubeIDE, PlatformIO, and the Arduino STM32 core, and any prototype firmware written on the Blue Pill ports directly to custom hardware when the same MCU is kept on the production board. The LQFP-48 footprint is also shared by several GD32 and APM32 pin-compatibles, simplifying second sourcing for educational kits.
おすすめ
IoT Sensor / Smart Home Edge Nodes
The STM32F103C8T6TR handles Smart Home and IoT edge nodes that need local sensor aggregation, BLE/Wi-Fi module handshaking, and OTA bootloading without committing to a high-cost M4-class part. Three USARTs (USART1/2/3) drive an ESP-01 Wi-Fi co-processor, a GPS module, and a debug console in parallel; two SPIs (up to 18 Mbit/s) talk to a LoRa SX1278 or a small TFT display; two I2C buses serve a BME280 environmental sensor and an OLED panel. The 12-bit ADC samples analog sensors such as soil-moisture probes, and the RTC plus 4-byte backup register keep a wall-clock time across deep-sleep cycles powered by a CR2032. The 2.0-3.6 V supply range supports direct lithium-ion battery operation via an LDO or buck.
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: STM32F103C8T6TR — 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 | STM32F103CBT6 | STM32F103C8T7 | GD32F103C8T6 | APM32F103C8T6 | STM32F030C8T6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | GigaDevice | STMicroelectronics |
| Package | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M0 (-1 class) |
| Max Clock | 72 MHz | 72 MHz | 72 MHz | 108 MHz (+50%) | 96 MHz (+33%) | 48 MHz (-33%) |
| Flash | 64 KB | 128 KB (+100%) | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 20 KB | 20 KB | 20 KB | 20 KB | 20 KB | 8 KB (-60%) |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | No USB |
| CAN | 1x CAN 2.0B | 1x CAN 2.0B | 1x CAN 2.0B | 1x CAN 2.0B | 1x CAN 2.0B | No CAN |
| Automotive Grade | No (industrial -40/+85C) | No | Yes (AEC-Q100) | No | No | No |
主な差別化要因
- Pin-compatible Flash-doubled drop-in within the same family （vs STM32F103CBT6)
- AEC-Q100 automotive temperature grade available on the same silicon/die （vs STM32F103C8T7)
- Two- to four-times faster core on the same LQFP-48 footprint （vs GD32F103C8T6)
設計ノート
Place 100 nF ceramic decoupling capacitors as close as possible to every VDD/VDDA pin pair (pins 24, 36, 48 / 9), with at least one bulk 4.7 µF capacitor on the main 3.3 V rail within 20 mm. VDDA requires a low-impedance connection; if the main 3.3 V supply is noisy, insert a ferrite bead between VDD and VDDA. Tie VBAT to VDD if a backup battery is not used. Always keep the BOOT0 pin held low at power-up to default-boot from Flash.
Route the 8 MHz HSE crystal traces short and symmetric, with the crystal placed within 5 mm of OSC_IN/OSC_OUT (pins 5/6) and the load capacitors (typically 20-30 pF) grounded right at the crystal case. Keep USB D+/D- (PA11/PA12) matched-length (target <2 mm delta) and place the 1.5 kΩ pull-up on D+ next to the connector, not the MCU side. Provide a 10 kΩ pull-up on NRST and a low-impedance path to GND through a reset push-button.
When using CAN or USB, add a TVS diode array such as USBLC6-2SC6 or PESD1CAN close to the connector to meet IEC 61000-4-2 ±8 kV air-discharge and ±4 kV contact-discharge ratings. The internal pull-up on USB D+ (PA12) is not strong enough for reliable enumeration; an external 1.5 kΩ resistor to 3.3 V is recommended. CAN bus termination should use 120 Ω at both ends only, with a split-capacitor network for stub suppression in multi-node harnesses.
Do not leave BOOT0 floating - noise on this pin during power-up will intermittently boot the MCU into the system bootloader and the application code will appear to be missing. Three common mistakes: (1) leaving VBAT floating instead of tying it to VDD, which charges the internal diode and corrupts backup register writes; (2) using PA13/PA14 as GPIO without disabling JTAG/SWD, since JTAG defaults to these pins after reset; (3) configuring GPIO output speed to '50 MHz' on I2C pins, which causes ringing - always select '2 MHz' open-drain with external pull-ups.
コンプライアンス情報
RoHS-compliant per ST product page; AEC-Q100 grade is a separate SKU (STM32F103C8T7). Halogen-free status not explicitly verified in the provided data and flagged as 'unknown'.
