STM32F103RBT6 - 72MHz Cortex-M3 MCU 128KB Flash | ST
料号： STM32F103RBT6 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.18 | $3,180.00 |
STM32F103RBT6 概述
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one device, forming the lowest layer of the embedded-system hierarchy: MCU -> microcontroller -> embedded processor -> system-on-chip. The ARM Cortex-M3 is a 32-bit RISC processor core optimized for cost-sensitive and power-conscious embedded control. The STM32F103 family was one of the first mainstream Cortex-M families adopted at scale across industrial electronics, in large part because of its rich peripheral set and pin compatibility across Flash derivatives.
Key features include the 72 MHz Cortex-M3 core delivering 1.25 DMIPS/MHz, 128 KB on-chip Flash, 20 KB SRAM, a 2.0 V to 3.6 V supply range with a 3.3 V operating point, two 12-bit ADCs with up to 1 microsecond conversion time and up to 16 input channels, two I2C, two SPI, three USART, one USB 2.0 full-speed interface, one CAN 2.0B active controller, and seven 16-bit timers including PWM-capable channels. An 8 MHz high-speed internal RC oscillator and support for an external 4 to 16 MHz crystal allow flexible clocking without external components.
Architecturally, the device uses an ARMv7-M Harvard structure with a three-stage pipeline and a Nested Vectored Interrupt Controller (NVIC) for low-latency interrupt response. An AHB/APB bus matrix allows peripheral DMA and core execution to proceed concurrently, while a Flash interface with prefetch buffer minimizes stalls when the 72 MHz core fetches instructions from Flash.
Typical applications include industrial control nodes, motor-control auxiliary boards, USB and CAN communication modules, low-cost development platforms, and legacy 8-bit/16-bit MCU upgrades where the ARM tool ecosystem reduces software cost. Designers also use this device in smart-metering peripherals and low-cost HMIs.
Design consideration: pin compatibility across the STM32F1 family means Flash upgrades from 128 KB to 256 KB (e.g., STM32F103RCT6) require no PCB change, but verify RAM sizing, peripheral count, and the 72 MHz maximum frequency when porting between derivative families.
This page synthesizes distributor pricing, verified drop-in alternatives including the GD32F103RBT6 cross-brand P2P candidate and STM32F103RCT6 same-family upgrade, plus practical design notes not found in the manufacturer datasheet.
直接替换替代料： STM32F103RBT6 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM32F103RBT6 （相同外形与封装尺寸） ——差异在于 Package, Timers, Flash Memory, ADC, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
STM32F103RCT6
✅ 直接替换✓ 有现货
$1.6406 / 个
查看数据手册 →STM32F103R8T6
✅ 直接替换✓ 有现货
$2.9 / 个
查看数据手册 →GD32F103RBT6
✅ 直接替换📋 参考替代料（不在目录中）
APM32F103RBT6
✅ 直接替换📋 参考替代料（不在目录中）
STM32F103RBT6 最大额定值与电气特性
| Core | ARM Cortex-M3 32-bit RISC |
| 最大时钟频率 | 72 MHz |
| Core Performance | 1.25 DMIPS/MHz |
| Program Memory (Flash) | 128 KB |
| SRAM | 20 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| 工作温度 | -40 C to +85 C (industrial grade) |
| 封装 | LQFP-64 (10x10 mm) |
| 安装类型 | Surface Mount |
| ADC | 2 x 12-bit, 1 us conversion, up to 16 channels |
| Timers | 7 x 16-bit (including PWM) |
| Communication Interfaces | 2 x SPI, 2 x I2C, 3 x USART, 1 x USB 2.0 FS, 1 x CAN 2.0B |
| I/O Pins (approx.) | 51 GPIOs |
| Internal Oscillator | 8 MHz HSI RC |
| External Crystal Range | 4 MHz to 16 MHz |
| DMA Channels | 7 channels |
| MSL 等级 | 3 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
STM32F103RBT6 引脚配置
| 引脚 1 | VBAT — RTC backup supply |
| 引脚 2 | PC13/TAMPER-RTC — GPIO PC13 or RTC tamper input |
| 引脚 3 | PC14/OSC32_IN — GPIO PC14 or 32 kHz crystal in |
| 引脚 4 | PC15/OSC32_OUT — GPIO PC15 or 32 kHz crystal out |
| 引脚 5 | OSC_IN — External clock input / crystal in |
| 引脚 6 | OSC_OUT — External clock output / crystal out |
| 引脚 7 | NRST — Reset input (active low) |
| 引脚 8 | VSSA — Analog ground |
| 引脚 9 | VDDA — Analog supply (3.3 V) |
| 引脚 10 | PA0/WKUP — GPIO PA0 / wakeup / ADC_IN0 |
| 引脚 11 | PA1 — GPIO PA1 / ADC_IN1 |
| 引脚 12 | PA2 — GPIO PA2 / USART2_TX / ADC_IN2 |
| 引脚 13 | PA3 — GPIO PA3 / USART2_RX / ADC_IN3 |
| 引脚 14 | PA4 — GPIO PA4 / SPI1_NSS / ADC_IN4 |
| 引脚 15 | PA5 — GPIO PA5 / SPI1_SCK / ADC_IN5 |
| 引脚 16 | PA6 — GPIO PA6 / SPI1_MISO / ADC_IN6 |
| 引脚 17 | PA7 — GPIO PA7 / SPI1_MOSI / ADC_IN7 |
| 引脚 18 | PB0 — GPIO PB0 / ADC_IN8 |
| 引脚 19 | PB1 — GPIO PB1 / ADC_IN9 |
| 引脚 20 | PB2/BOOT1 — GPIO PB2 / boot mode select |
| 引脚 21 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX |
| 引脚 22 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX |
| 引脚 23 | VSS_1 — Ground |
| 引脚 24 | VDD_1 — Digital supply (3.3 V) |
| 引脚 25 | PB12 — GPIO PB12 / SPI2_NSS |
| 引脚 26 | PB13 — GPIO PB13 / SPI2_SCK |
| 引脚 27 | PB14 — GPIO PB14 / SPI2_MISO |
| 引脚 28 | PB15 — GPIO PB15 / SPI2_MOSI |
| 引脚 29 | PA8 — GPIO PA8 / USART1_CK / TIM1_CH1 |
| 引脚 30 | PA9 — GPIO PA9 / USART1_TX / TIM1_CH2 |
| 引脚 31 | PA10 — GPIO PA10 / USART1_RX / TIM1_CH3 |
| 引脚 32 | PA11/USBDM — GPIO PA11 / USB D- |
| 引脚 33 | PA12/USBDP — GPIO PA12 / USB D+ |
| 引脚 34 | PA13/SWDIO — GPIO PA13 / SWD data |
| 引脚 35 | VSS_2 — Ground |
| 引脚 36 | VDD_2 — Digital supply (3.3 V) |
| 引脚 37 | PA14/SWCLK — GPIO PA14 / SWD clock |
| 引脚 38 | PA15 — GPIO PA15 / TIM2_CH1_ETR / SPI1_NSS_remap |
| 引脚 39 | PB3 — GPIO PB3 / TIM2_CH2 / SPI1_SCK_remap |
| 引脚 40 | PB4 — GPIO PB4 / TIM3_CH1 / SPI1_MISO_remap |
| 引脚 41 | PB5 — GPIO PB5 / I2C1_SMBAI / TIM3_CH2 |
| 引脚 42 | PB6 — GPIO PB6 / I2C1_SCL / TIM4_CH1 |
| 引脚 43 | PB7 — GPIO PB7 / I2C1_SDA / TIM4_CH2 |
| 引脚 44 | BOOT0 — Boot mode select (system / bootloader) |
| 引脚 45 | PB8 — GPIO PB8 / TIM4_CH3 / CAN_RX |
| 引脚 46 | PB9 — GPIO PB9 / TIM4_CH4 / CAN_TX |
| 引脚 47 | VSS_3 — Ground |
| 引脚 48 | VDD_3 — Digital supply (3.3 V) |
| 引脚 49 | VSS_4 — Ground |
| 引脚 50 | VDD_4 — Digital supply (3.3 V) |
| 引脚 51 | PC0 — GPIO PC0 / ADC_IN10 |
| 引脚 52 | PC1 — GPIO PC1 / ADC_IN11 |
| 引脚 53 | PC2 — GPIO PC2 / ADC_IN12 |
| 引脚 54 | PC3 — GPIO PC3 / ADC_IN13 |
| 引脚 55 | VREF- — ADC negative reference |
| 引脚 56 | VREF+ — ADC positive reference |
| 引脚 57 | PA0 (NC duplicate) — Not connected (per datasheet) |
| 引脚 58 | VSS_5 — Ground |
| 引脚 59 | VDD_5 — Digital supply (3.3 V) |
| 引脚 60 | PA8 (NC) — Not connected (per datasheet) |
| 引脚 61 | NC — Not connected (per datasheet) |
| 引脚 62 | NC — Not connected (per datasheet) |
| 引脚 63 | VSS_6 — Ground |
| 引脚 64 | VDD_6 — Digital supply (3.3 V) |
典型应用
STM32F103RBT6 适用于 6 应用s: Industrial Control Node, USB Communication Module, Motor Control Auxiliary Board, Smart Metering Peripheral, Low-Cost Development Platform, Legacy 8/16-bit MCU Upgrade Path.
Industrial Control Node
The STM32F103RBT6 fits industrial control nodes thanks to its 72 MHz Cortex-M3 core, 128 KB Flash for protocol stacks, and on-chip CAN 2.0B for fieldbus integration. Its 2.0 V to 3.6 V supply and -40 C to +85 C industrial temperature range cover factory-floor conditions without extra regulation. The two 12-bit ADCs with 1 us conversion time sample 4 to 20 mA sensor signals at high update rates, while seven 16-bit timers drive PWM outputs to motor drivers and SSR banks. Engineers typically pair this MCU with an external CAN transceiver such as a TJA1050 for CANopen or DeviceNet nodes, reusing the same LQFP-64 footprint across product variants.
推荐
USB Communication Module
The STM32F103RBT6's on-chip USB 2.0 full-speed device/host interface eliminates the need for an external PHY, allowing direct connection to a USB connector with pull-up resistors. The 128 KB Flash comfortably holds USB device class stacks (HID, CDC, MSC) and 20 KB SRAM buffers HID and CDC packets at full-speed rates. Designers use this MCU in HID input devices, USB-to-UART bridges, and USB mass-storage controllers where the Cortex-M3's deterministic interrupt response keeps USB SOF jitter within spec. According to the ST datasheet, the USB DP/DM pins are 5 V tolerant when VDD is present, simplifying bus-powered designs.
推荐
Motor Control Auxiliary Board
The STM32F103RBT6 drives BLDC and stepper auxiliary boards via its seven 16-bit timers, of which TIM1 and TIM8 provide complementary PWM outputs with programmable dead-time insertion. Its 72 MHz Cortex-M3 executes field-oriented control loops at typical 10 to 20 kHz PWM while leaving cycles for commutation, current sampling via the two ADCs, and CAN status reporting. The 51 GPIOs on the LQFP-64 footprint give enough headroom for Hall sensors, encoder inputs, and fault inputs. This MCU is commonly chosen as a low-cost companion to a dedicated FOC controller or as a stand-alone TRINAMIC-style stepper driver.
推荐
Smart Metering Peripheral
The STM32F103RBT6 fits smart-metering peripherals where its 128 KB Flash stores DLMS/COSEM or Modbus stacks and 20 KB SRAM buffers metering frames. Its dual 12-bit ADC pair samples voltage and current channels at high accuracy, while RTC domain with VBAT retains time and tamper counters across power cycles. The on-chip CAN or USART link to a metering concentrator simplifies sub-meter designs, and the -40 C to +85 C temperature range suits outdoor enclosures. Engineers reuse the same LQFP-64 PCB across 1-phase and 3-phase variants by selecting the Flash derivative that matches firmware size.
推荐
Low-Cost Development Platform
The STM32F103RBT6 is a long-standing favorite for low-cost development boards, including STM32 Nucleo-64 and countless third-party clones, because the 128 KB Flash, 64-pin LQFP, and rich peripherals make it ideal for teaching ARM toolchains. Students and engineers get full-speed USB drag-and-flash programming, on-chip CAN for automotive demos, and enough timers to drive RGB LED matrices. Its 72 MHz headroom and 20 KB SRAM run FreeRTOS with multiple tasks comfortably. The same package as the RBT6 hosts the lower-Flash R8T6 and the higher-Flash RCT6, letting one PCB support a development family.
推荐
Legacy 8/16-bit MCU Upgrade Path
The STM32F103RBT6 is widely used to upgrade designs from legacy 8-bit PIC16/AVR and 16-bit MSP430 parts because the Cortex-M3 delivers 10x to 20x the DMIPS at a similar price point. The 128 KB Flash absorbs larger C/C++ firmware, while the 51 GPIOs on LQFP-64 usually cover pin requirements of older designs without re-routing. Its USART, SPI, and I2C peripherals drop into existing peripheral buses with minimal driver changes. The -40 C to +85 C range and 3.3 V operation match typical industrial 8-bit replacement scenarios, and the STM32 ecosystem shortens software porting from 8 to 32 bits.
推荐
推荐产品汇总
工程参考数据： STM32F103RBT6 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STM32F103RCT6 | STM32F103R8T6 | STM32F103VBT6 | GD32F103RBT6 | APM32F103RBT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | GigaDevice (APM32 series) |
| Package | LQFP-64 | LQFP-64 (same) | LQFP-64 (same) | LQFP-100 (different) | LQFP-64 (same) | LQFP-64 (same) |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Maximum Clock | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 108 MHz | 72 MHz |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 20 KB | 48 KB | 20 KB | 20 KB | 20 KB | 20 KB |
| USB 2.0 FS | Yes | Yes | Yes | Yes | Yes | Yes |
| CAN 2.0B | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
关键差异点
- Higher SRAM headroom on same LQFP-64 footprint （对比 STM32F103R8T6)
- Pin-compatible Flash upgrade （对比 STM32F103RCT6)
- 50% faster core clock in cross-brand second source （对比 GD32F103RBT6)
设计说明
Estimated: at 72 MHz full Cortex-M3 load, the STM32F103RBT6 core draws roughly 36 mA from VDD, while USB enumeration can add another 10 to 20 mA on VDDA through the internal 3.3 V regulator. Decouple each VDD pin with 100 nF X7R placed within 3 mm, add a 4.7 uF bulk cap near the package, and place a ferrite bead between VDDA and VDD if analog accuracy matters.
A common STM32F103RBT6 design pitfall is leaving BOOT0 floating - it must be tied to GND through 10 kohm for normal boot from Flash, or to VDD for system memory bootloader. Also remember NRST requires a 10 kohm pull-up and a 100 nF cap to GND; without the cap, USB enumeration can fail because NRST glitches during USB attach.
Keep the OSC_IN/OSC_OUT traces short and symmetric, and route the 32 kHz crystal traces away from switching signals. The USB DP/DM pair must be 90 ohm differential with length matching to within 2 mm; place the 22 ohm series resistors within 5 mm of the MCU. According to ST application note AN2860, ground the crystal body to the same ground as VSS with a single via to avoid oscillator jitter.
合规信息
RoHS and REACH compliance per ST product page. Not AEC-Q100 qualified; use STM32F103RCT7 or STM32F103VDT7 for AEC-Q100 automotive designs.
