STMicroelectronics

STM32F103C8T6 - 72MHz Cortex-M3 MCU, 64KB Flash, LQFP-48 | STMicroelectronics

Teilenummer: STM32F103C8T6 ✓ Aktiv
Auf Lager Versand in 1–3 Werktagen
2.0 V to 3.6 V Vdss LQFP-48 (7x7 mm, 0.5 mm pitch) Package 72 MHz Speed 64 KB Memory
Ab $1.68 USD / Stück
MOQ: 1 |
Preis aktualisiert: 2026-10-14
Mengenpreise
Menge Stückpreis Gesamt
1 $3.1 $3,10
10 $2.78 $27,80
100 $2.45 $245,00
500 $2.18 $1.090,00
1.000 $1.92 $1.920,00
3.000 $1.68 $5.040,00
ℹ️ Alle Preise sind in USD

STM32F103C8T6 Übersicht

Der STMicroelectronics STM32F103C8T6 ist ein 32-Bit-ARM-Cortex-M3-Mikrocontroller der Medium-Density-Performance-Line, der mit bis zu 72 MHz arbeitet, über 64 KB Flash und 20 KB SRAM verfügt und im 48-Pin-LQFP-Gehäuse (7x7 mm) untergebracht ist.

Ein ARM-Cortex-M3-Mikrocontroller (MCU) ist ein 32-Bit-RISC-Prozessorkern, der von Arm Holdings für Embedded-Anwendungen entwickelt wurde, die deterministische Echtzeitleistung bei geringem Stromverbrauch erfordern. Der Cortex-M3 liegt am unteren Ende der Cortex-M-Familie (über Cortex-M0/M0+ und unter Cortex-M4/M7), und Mikrocontroller dieser Kategorie kombinieren den Prozessorkern mit On-Chip-Speicher, Peripherie und analogen Blöcken zu einem einzigen System-on-Chip. Die STM32F103-Familie gehört konkret zur übergeordneten Hierarchie: ARM Cortex-M3 -> 32-Bit-MCU -> STM32F1-Serie -> STM32-Mainstream-Familie -> STMicroelectronics-Mikrocontroller -> Halbleiter. Diese Hierarchie ist wichtig, weil sie die Toolchain (Arm Cortex-M3 unterstützt die Standard-Flows Arm Keil, IAR, GCC und STM32CubeIDE) und das Peripherie-Programmiermodell bestimmt, das auf der gesamten STM32-Plattform verwendet wird.

Zu den Hauptmerkmalen gehören 64 KB eingebetteter Flash mit Read-While-Write-Fähigkeit, 20 KB SRAM, ein Versorgungsspannungsbereich von 2,0 V bis 3,6 V, ein interner 8-MHz-RC-Oszillator mit PLL-Multiplikator auf 72 MHz, zwei 12-Bit-ADCs (1 µs Wandlungszeit, bis zu 16 Kanäle), sieben 16-Bit-Timer und ein USB-2.0-Full-Speed-Device/Host/OTG-Controller. Zu den Kommunikationsperipherien gehören drei USARTs, zwei SPIs (18 Mbit/s), zwei I2C-Busse (400 kHz), eine CAN-2.0B-Schnittstelle und ein USB-Full-Speed-Port. Das 48-Pin-LQFP-Gehäuse stellt 37 GPIO-Pins bereit, die 5 V-tolerant sind.

Architektonisch liefert der Cortex-M3-Kern 1,25 Dhrystone MIPS pro MHz, unterstützt den Thumb-2-Befehlssatz und enthält einen Nested Vectored Interrupt Controller (NVIC) mit konfigurierbarer Priorität und Hardware-Stack-Verwaltung. Der integrierte Spannungsregler und der Brown-Out-Reset (BOR) vereinfachen das Stromversorgungsdesign, während das 4-Byte-Backup-Register mit Tamper-Detection-Pin batteriegepufferte RTC-Modi unterstützt.

Typische Anwendungen umfassen industrielle Steuerungsplatinen, Motorantriebe (BLDC/PMSM-FOC-Ergänzungen), USB-HID/COM-Port-Geräte, CAN-Bus-Knotenschnittstellen und kostengünstige Entwicklungsplattformen wie das bekannte "Blue Pill"-Board.

Beim Design mit diesem Baustein sollte ein 100-nF-Keramik-Entkopplungskondensator so nah wie möglich an jedem VDD/VDDA-Pin-Paar platziert und der NRST-Pin-Anschluss für einen 10-kΩ-Pull-up und einen optionalen Reset-Taster reserviert werden. Stellen Sie sicher, dass der BOOT0-Pin-Zustand bei jedem Einschalten dem gewünschten Boot-Speicher entspricht.

Diese Seite fasst Distributorpreise, Drop-in-Alternativen (zuerst STM32F103-Varianten derselben Marke, dann markenübergreifende pin-kompatible Teile) und praktische Designhinweise zusammen, die nicht im Herstellerdatenblatt zu finden sind.

Drop-in-Alternativen für STM32F103C8T6 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.

Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:

STM32F103CBT6

STMicroelectronics
ARM Cortex-M3 32-bit RISC · 72 MHz · 128 KB · 20 KB · 2.0 V to 3.6 V · 37 (5 V tolerant) · 2x 12-bit, up to 10 channels · 1x 12-bit

✓ Auf Lager

$3.2 / Stück

Datenblatt ansehen →

STM32F030C8T6

STMicroelectronics
ARM Cortex-M0 32-bit · 48 MHz · 64 KB · 8 KB · 2.4 V to 3.6 V · 12-bit · up to 16 external channels · 5 timers including 1 advanced-control timer

✓ Auf Lager

$0.98 / Stück

Datenblatt ansehen →

STM32F103C8T7

Same die, AEC-Q100 automotive grade, 105C vs 85C max Tj, pin-to-pin compatible

📋 Referenzalternative (nicht im Katalog)

GD32F103C8T6

Same LQFP-48 pinout, Cortex-M3 core but 108MHz vs 72MHz (+50%), register map largely compatible

📋 Referenzalternative (nicht im Katalog)

APM32F103C8T6

Same LQFP-48 footprint, Cortex-M3 at 96MHz, register-compatible with HAL layer

📋 Referenzalternative (nicht im Katalog)

STM32F103C8T6 Grenzwerte & elektrische Eigenschaften

Core Architecture ARM Cortex-M3 (32-bit RISC)
Maximale Taktfrequenz 72 MHz
Flash Memory 64 KB
SRAM 20 KB
Supply Voltage (VDD) 2.0 V to 3.6 V
Gehäuse 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
Betriebstemperatur -40 °C to +85 °C (industrial grade)
RoHS-Status Compliant

STM32F103C8T6 Pin-Konfiguration

LQFP-48 Package Pinout Diagram LQFP-48 7x7mm, P0.5mm, JEDEC MS-026. 1 12 LQFP-48
Pin 1 VBAT — Backup battery supply input
Pin 2 PC13 — GPIO PC13, anti-tamper (RTC)
Pin 3 PC14 — GPIO PC14 / OSC32_IN
Pin 4 PC15 — GPIO PC15 / OSC32_OUT
Pin 5 OSC_IN — HSE oscillator input
Pin 6 OSC_OUT — HSE oscillator output
Pin 7 NRST — Reset input, active-low
Pin 8 VSSA — Analog ground
Pin 9 VDDA — Analog supply (2.4 V - 3.6 V)
Pin 10 PA0 — GPIO PA0 / WKUP / ADC_IN0 / TIM2_CH1
Pin 11 PA1 — GPIO PA1 / ADC_IN1 / TIM2_CH2
Pin 12 PA2 — GPIO PA2 / USART2_TX / ADC_IN2
Pin 13 PA3 — GPIO PA3 / USART2_RX / ADC_IN3
Pin 14 PA4 — GPIO PA4 / SPI1_NSS / ADC_IN4
Pin 15 PA5 — GPIO PA5 / SPI1_SCK / ADC_IN5
Pin 16 PA6 — GPIO PA6 / SPI1_MISO / ADC_IN6
Pin 17 PA7 — GPIO PA7 / SPI1_MOSI / ADC_IN7
Pin 18 PB0 — GPIO PB0 / ADC_IN8 / TIM3_CH3
Pin 19 PB1 — GPIO PB1 / ADC_IN9 / TIM3_CH4
Pin 20 PB2 — GPIO PB2 / BOOT1 (also PB-BOOT input)
Pin 21 PB10 — GPIO PB10 / I2C2_SCL / USART3_TX
Pin 22 PB11 — GPIO PB11 / I2C2_SDA / USART3_RX
Pin 23 VSS_1 — Digital ground
Pin 24 VDD_1 — Digital supply (2.0 V - 3.6 V)
Pin 25 PB12 — GPIO PB12 / SPI2_NSS / CAN2_RX
Pin 26 PB13 — GPIO PB13 / SPI2_SCK / CAN2_TX / USB_DP pull-up
Pin 27 PB14 — GPIO PB14 / SPI2_MISO
Pin 28 PB15 — GPIO PB15 / SPI2_MOSI
Pin 29 PA8 — GPIO PA8 / USART1_CK / TIM1_CH1
Pin 30 PA9 — GPIO PA9 / USART1_TX / TIM1_CH2
Pin 31 PA10 — GPIO PA10 / USART1_RX / TIM1_CH3
Pin 32 PA11 — GPIO PA11 / CAN1_RX / USBDM (USB data minus)
Pin 33 PA12 — GPIO PA12 / CAN1_TX / USBDP (USB data plus)
Pin 34 PA13 — GPIO PA13 / JTMS / SWDIO
Pin 35 VSS_2 — Digital ground
Pin 36 VDD_2 — Digital supply (2.0 V - 3.6 V)
Pin 37 PA14 — GPIO PA14 / JTCK / SWCLK
Pin 38 PA15 — GPIO PA15 / JTDI
Pin 39 PB3 — GPIO PB3 / JTDO / TRACESWO
Pin 40 PB4 — GPIO PB4 / JNTRST
Pin 41 PB5 — GPIO PB5 / I2C1_SMBAI
Pin 42 PB6 — GPIO PB6 / I2C1_SCL / TIM4_CH1
Pin 43 PB7 — GPIO PB7 / I2C1_SDA / TIM4_CH2
Pin 44 BOOT0 — Boot mode select (0 = Flash, 1 = System bootloader)
Pin 45 PB8 — GPIO PB8 / TIM4_CH3
Pin 46 PB9 — GPIO PB9 / TIM4_CH4
Pin 47 VSS_3 — Digital ground
Pin 48 VDD_3 — Digital supply (2.0 V - 3.6 V)

Typische Anwendungen

STM32F103C8T6 ist geeignet für 6 Anwendungs: 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 STM32F103C8T6 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.

🌐

USB HID / Virtual COM Port Devices

The STM32F103C8T6'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.

✈️

BLDC / PMSM Motor Drives

The STM32F103C8T6 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.

🚗

CAN-Bus Node Interface

The STM32F103C8T6 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.

🧩

Low-Cost Development Platforms ("Blue Pill")

The STM32F103C8T6 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.

🧩

IoT Sensor / Smart Home Edge Nodes

The STM32F103C8T6 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.

Zusammenfassung der empfohlenen Produkte

STM32F103CBT6 STMicroelectronics Verwendet in: Industrial Control Boards, Low-Cost Development Platforms ("Blue Pill") STM32F030C8T6 STMicroelectronics Verwendet in: Industrial Control Boards, IoT Sensor / Smart Home Edge Nodes GD32F103C8T6 Pin-compatible second source Verwendet in: 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 STM32F103C8T7 AEC-Q100 variant for harsh environments Verwendet in: USB HID / Virtual COM Port Devices, CAN-Bus Node Interface STM32F103RBT6 STMicroelectronics Verwendet in: BLDC / PMSM Motor Drives
What is the operating voltage of STM32F103C8T6?
The STM32F103C8T6 operates from a single 2.0 V to 3.6 V supply. According to the STMicroelectronics datasheet, the part includes an internal voltage regulator that generates the 1.8 V core supply from VDD, and a separate VDDA pin (2.4 V to 3.6 V) is required for the ADC block. Designers should place 100 nF decoupling capacitors on every VDD/VDDA pin pair and ensure the voltage ramp respects the power-on reset thresholds.
How much Flash and SRAM does the STM32F103C8T6 have?
The STM32F103C8T6 integrates 64 KB of Flash memory and 20 KB of SRAM. The 'C8' device code indicates the 48-pin medium-density package class with 64 KB Flash, while larger 'CB' (128 KB) variants in the same package footprint exist within the STM32F103 family. Flash endurance is rated at 10 k cycles minimum with 128-bit-wide access, and SRAM is retained across Standby and Stop modes when the backup regulator is enabled.
What is the maximum clock frequency of STM32F103C8T6?
The Cortex-M3 core in the STM32F103C8T6 runs at up to 72 MHz on the medium-density line, derived from an 8 MHz internal RC oscillator multiplied by a 9x PLL. At 72 MHz the core delivers 90 DMIPS (1.25 DMIPS/MHz). Source: STMicroelectronics STM32F103x8/xB datasheet (RM0008 reference manual). Note that drop-in alternatives such as GD32F103C8T6 support 108 MHz, which requires re-tuning Flash wait states.
What package does STM32F103C8T6 use and what is its pin count?
The STM32F103C8T6 ships in a 48-pin LQFP package measuring 7x7 mm with a 0.5 mm lead pitch (ST commercial code 'T6'). The device exposes 37 GPIO pins, plus power, ground, oscillator, reset, boot mode, and JTAG/SWD debug pins. Footprints are shared with the 48-pin LQFP variants of GD32F103C8T6, APM32F103C8T6, and STM32F103CBT6 for true drop-in compatibility.
Where can I buy the STM32F103C8T6 right now?
The STM32F103C8T6 is available from major authorized distributors including DigiKey, Mouser, Arrow, LCSC, and AliExpress. As of 2026-10-10, distributor inventory is mixed and lead times for large production quantities have stretched to 16-22 weeks at several channels, which has driven strong demand for the GD32F103C8T6 second source. Small quantities (1-100 pieces) are typically stocked; production volumes should be confirmed with the sales team before committing.
What is the current price of STM32F103C8T6 in 100-piece quantities?
The STM32F103C8T6 unit price is approximately USD 2.45 at qty 100, USD 2.18 at qty 500, and USD 1.92 at qty 1000 as of 2026-10-10, sourced from major authorized distributors. Pricing fluctuates with the 2026 allocation cycle; sourcing through LCSC for a Chinese-market alternative such as GD32F103C8T6 can drop the BOM cost to roughly USD 0.45 at qty 1000. Always request a current quote before budgeting because allocation-driven price swings of ±30 percent are common in this family.
What is the lead time for STM32F103C8T6 in 2026?
Lead times for the STM32F103C8T6 in 2026 extend 16-22 weeks for production volumes through several authorized distributors, reflecting ongoing allocations in the STM32F1 line. Engineering and small-prototype quantities (under 100 pieces) are typically shippable from local stock. Where lead time is unacceptable, GigaDevice GD32F103C8T6 (Cortex-M3, 108 MHz, same LQFP-48 footprint) is the most common pin-and-footprint second source.
STM32F103C8T6 vs STM32F103CBT6 - which should I choose?
The STM32F103CBT6 is a direct drop-in upgrade in the same LQFP-48 footprint with 128 KB Flash (versus 64 KB on the C8T6). Both share identical peripherals, voltage range (2.0 V to 3.6 V), and 72 MHz clock; the CBT6 simply doubles program memory. Choose C8T6 when 64 KB is sufficient and BOM cost is paramount; choose CBT6 when firmware headroom is needed or firmware may grow during development.
Is the GD32F103C8T6 a true drop-in replacement for STM32F103C8T6?
The GD32F103C8T6 from GigaDevice is widely documented as a pin-and-software-compatible drop-in replacement for the STM32F103C8T6 in the same LQFP-48 footprint. Key differences: the GD32 Cortex-M3 core runs up to 108 MHz (versus 72 MHz on STM32), the Flash wait-state configuration differs, and a small number of register/SRAM-edge behaviors require firmware review before production use. Most STM32 HAL code ports with only clock-tree adjustments.
What is the best drop-in replacement for STM32F103C8T6?
The best cross-brand drop-in replacement is the GD32F103C8T6 from GigaDevice: same LQFP-48 footprint (7x7 mm, 0.5 mm pitch), same ARM Cortex-M3 architecture, same registers, and largely software-compatible firmware. Other pin-compatible options include APM32F103C8T6 (Geehy) and AT32F403ACGT7 (Artery), each with minor clock or peripheral caveats. All three drop-ins substitute the original on the same PCB land pattern with no rework.
Should I use the STM32F103C8T6 or STM32F030C8T6 for a new design?
For new designs in 2026, the STM32F030C8T6 (Cortex-M0, 48 MHz) is the more modern ST choice when the application does not need USB or CAN, and the STM32G071CBT6 or STM32G431KB is recommended when newer peripherals (USB Type-C, FPU, higher ADC speed) matter. The STM32F103C8T6 remains a strong pick when firmware reuse, mature ecosystem, or USB and CAN requirements make porting unnecessary.
Where can I download the STM32F103C8T6 datasheet as a PDF?
The official datasheet PDF is hosted on the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32f103c8.pdf. The companion reference manual is RM0008 (STM32F100/101/102/103/105/107 advanced Arm-based 32-bit MCUs). Both documents cover electrical characteristics, memory mapping, peripheral registers, and package information. Third-party mirror sites exist but should not be cited for compliance evidence.
Where is the pinout diagram for STM32F103C8T6 in the datasheet?
The pinout diagram is located in the STM32F103x8/xB datasheet section labeled 'Pinouts and pin description', immediately after the package mechanical drawing. For the LQFP-48 (commercial code T6, 7x7 mm body, 0.5 mm pitch) the diagram shows pins numbered 1 through 48 counter-clockwise starting from the top-left pin (pin-1 marker dot). ADCs, USARTs, I2C, SPI, USB, CAN, and oscillator pins are highlighted in the alternate-function tables on the same pages.
What is the difference between STM32F103C8T6 and STM32F103R8T6?
The STM32F103C8T6 and STM32F103R8T6 are both medium-density STM32F103 Cortex-M3 parts running at 72 MHz, but they differ in pin count: C8T6 is 48-pin LQFP (7x7 mm) while R8T6 is 64-pin LQFP (10x10 mm). The R8T6 therefore exposes more GPIO, more USART instances, and additional peripheral remap options. Choose C8T6 for compact boards and R8T6 when extra peripheral channels are needed; both are pin-compatible within the STM32 family but cannot be PCB-swapped on the same footprint.
Is the STM32F103C8T6 still in production, and is it RoHS compliant?
The STM32F103C8T6 is currently listed as ACTIVE in STMicroelectronics' lifecycle database and remains in production. The part is supplied RoHS-compliant in lead-free LQFP packaging, fully compatible with Pb-free reflow profiles up to 260 °C peak (JEDEC J-STD-020 MSL3). For automotive-grade AEC-Q100 qualification, ST sells the STM32F103C8T7 (-40 °C to +105 °C) qualified variant; choose it explicitly for vehicle applications.

Technische Referenzdaten für STM32F103C8T6 – Vergleich, Designhinweise und Compliance-Informationen.

Auswahlhilfe

Wählen Sie den STM32F103C8T6, wenn Sie das vertrauteste 72-MHz-ARM-Cortex-M3-Gerät mit USB, CAN, drei USARTs und 64 KB Flash benötigen und vollständig unterstützte Hersteller-Middleware unter STM32CubeIDE wünschen. Wählen Sie den STM32F103CBT6 (gleiches LQFP-48-Footprint, 128 KB Flash), wenn die Firmware sich der 64-KB-Grenze nähert. Wählen Sie den STM32F103C8T7 (AEC-Q100, 105 °C), wenn die Anwendung automotive oder industriell rau ist. Wählen Sie den GD32F103C8T6 (GigaDevice, 108 MHz, gleiches Footprint), wenn sich Lieferzeiten verlängern oder Sie eine 50 % Taktsteigerung mit geringer Firmware-Überprüfung benötigen. Wählen Sie den STM32F030C8T6 (M0, 48 MHz) nur, wenn USB und CAN nicht erforderlich sind; er kostet etwa USD 0,50 weniger pro Einheit. Das LQFP-48-Footprint wird von allen fünf Teilen geteilt, sodass PCB-Layout und BOM innerhalb dieses Auswahlbaums austauschbar sind.

Vergleich mit Alternativen

Parameter Dieses Produkt 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

Wichtigste Unterscheidungsmerkmale

  • Pin-kompatibler Drop-in mit doppeltem Flash innerhalb derselben Familie (vs. STM32F103CBT6)
  • AEC-Q100-Automotive-Temperaturgrad auf demselben Silizium/Die verfügbar (vs. STM32F103C8T7)
  • Zwei- bis viermal schnellerer Kern auf demselben LQFP-48-Footprint (vs. GD32F103C8T6)

Designhinweise

Platzieren Sie 100-nF-Keramik-Entkopplungskondensatoren so nah wie möglich an jedem VDD/VDDA-Pin-Paar (Pins 24, 36, 48 / 9), mit mindestens einem Bulk-Kondensator von 4,7 µF auf der Haupt-3,3-V-Schiene innerhalb von 20 mm. VDDA erfordert eine niederimpedante Verbindung; wenn die Haupt-3,3-V-Versorgung verrauscht ist, fügen Sie eine Ferritperle zwischen VDD und VDDA ein. Verbinden Sie VBAT mit VDD, wenn keine Backup-Batterie verwendet wird. Halten Sie den BOOT0-Pin beim Einschalten immer auf Low, um standardmäßig aus dem Flash zu booten.

Führen Sie die 8-MHz-HSE-Quarzleitungen kurz und symmetrisch, platzieren Sie den Quarz innerhalb von 5 mm von OSC_IN/OSC_OUT (Pins 5/6) und erden Sie die Lastkondensatoren (typischerweise 20-30 pF) direkt am Quarzgehäuse. Halten Sie USB D+/D- (PA11/PA12) längengleich (Ziel <2 mm Delta) und platzieren Sie den 1,5-kΩ-Pull-up an D+ neben dem Stecker, nicht auf der MCU-Seite. Stellen Sie einen 10-kΩ-Pull-up an NRST und einen niederimpedanten Pfad zu GND über einen Reset-Taster bereit.

Fügen Sie bei Verwendung von CAN oder USB ein TVS-Diodenarray wie USBLC6-2SC6 oder PESD1CAN nahe am Stecker hinzu, um die IEC 61000-4-2 ±8 kV Luftentladung und ±4 kV Kontaktentladung zu erfüllen. Der interne Pull-up an USB D+ (PA12) ist nicht stark genug für eine zuverlässige Enumeration; ein externer 1,5-kΩ-Widerstand nach 3,3 V wird empfohlen. Die CAN-Bus-Terminierung sollte nur an beiden Enden 120 Ω verwenden, mit einem Split-Kondensator-Netzwerk zur Stichleitungsunterdrückung in Mehrknoten-Kabelbäumen.

Lassen Sie BOOT0 nicht floaten - Rauschen auf diesem Pin während des Einschaltens bootet die MCU sporadisch in den System-Bootloader und der Anwendungscode scheint zu fehlen. Drei häufige Fehler: (1) VBAT floaten lassen statt es mit VDD zu verbinden, was die interne Diode lädt und Backup-Register-Schreibvorgänge korrumpiert; (2) PA13/PA14 als GPIO verwenden, ohne JTAG/SWD zu deaktivieren, da JTAG nach dem Reset standardmäßig diese Pins belegt; (3) die GPIO-Ausgangsgeschwindigkeit auf I2C-Pins auf '50 MHz' konfigurieren, was Ringing verursacht - wählen Sie immer '2 MHz' Open-Drain mit externen Pull-ups.

Compliance-Informationen

RoHS
Compliant
REACH
Compliant
AEC-Q100
Bleifrei
Halogenfrei
Unknown
Konfliktmineralien
Compliant

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'.

Daten verifiziert am: 2026-10-10 – Daten geprüft und kuratiert vom Bauteil-Engineering-Team von XAIPART

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