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STMicroelectronics STM32F103C4T6A
- Part No.:
- STM32F103C4T6A
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F103C4T6A.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
STM32F103C4T6A from STMicroelectronics is a low-density ARM Cortex-M3 microcontroller in LQFP48 package, featuring 16 KB Flash, 6 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B controller - deployed in industrial sensor nodes requiring real-time control and dual-protocol connectivity.
For engineers reviewing the STM32F103C4T6A datasheet, STM32F103C4T6A pinout, STM32F103C4T6A application, or STM32F103C4T6A equivalent, key selection criteria include Flash size vs. peripheral count trade-offs, LQFP48 thermal performance under 72 MHz operation, CAN/USB coexistence timing, and 2×12-bit ADC channel mapping for analog sensing.
Technical Context
The device implements a tightly coupled ARM Cortex-M3 core with Harvard bus architecture, supporting single-cycle multiplication and hardware division. Its clock tree integrates dual oscillators (8 MHz HSI + 4–16 MHz HSE), PLL-based 72 MHz system clock, and dedicated 32 kHz LSE for RTC calibration.
Peripheral interconnect uses AHB/APB2/APB1 buses with NVIC-driven interrupt routing. The 2×12-bit ADCs operate at 1 µs conversion time with dual-sample-and-hold and integrated temperature sensor - enabling synchronized analog acquisition across up to 16 channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 72 MHz max frequency - enables deterministic real-time task scheduling with 1.25 DMIPS/MHz performance |
| Flash Memory | 16 KB - sufficient for bootloader + basic RTOS + application logic in space-constrained embedded designs |
| SRAM | 6 KB - supports stack/heap allocation for multi-threaded firmware with moderate peripheral buffering |
| ADC Resolution | 12-bit, 1 µs conversion - delivers ±1 LSB INL for precision sensor signal digitization without external oversampling |
| Communication Interfaces | 1×CAN 2.0B, 1×USB 2.0 FS, 2×USART, 1×SPI, 1×I²C - enables fieldbus integration and host-side firmware updates via USB CDC |
| Timers | 6 timers including 2×16-bit general-purpose, 1×16-bit motor control PWM, 2×watchdog - supports encoder feedback, PWM generation, and fail-safe timeout monitoring |
| Supply Voltage | 2.0–3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails without level-shifting circuitry |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK® construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O rail decoupling; 5 V-tolerant I/Os simplify interface with legacy peripherals |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | Up to 37 GPIOs mapped to 16 EXTI lines - supports wake-up from Stop mode via edge-triggered external interrupts |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB transceiver pins - require no external PHY; internal pull-ups enable enumeration without external components |
| PB8/PB9 | CAN RX/TX | Direct connection to external CAN transceiver - supports bit rates up to 1 Mbit/s with programmable sample point |
| PA0, PA1 | ADC1_IN0/ADC1_IN1 | Analog input channels with shared sampling - enables simultaneous voltage/current measurement in motor control loops |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates firmware image integrity checks and communication packet validation without CPU overhead |
| Temperature sensor | Integrated die-temperature sensing with ±2°C accuracy - eliminates need for external thermal monitoring ICs |
| Serial wire debug (SWD) | 2-pin debug interface replacing JTAG - reduces PCB footprint while maintaining full flash programming and real-time trace capability |
| Programmable voltage detector (PVD) | Configurable brown-out detection threshold (2.2–2.9 V) - triggers interrupt or reset before Flash write corruption occurs |
| VBAT-powered RTC | Real-time clock and 4 backup registers retain state during main power loss - enables timestamping and battery-backed event logging |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
Use Scenario: Compact environmental monitor collecting temperature, humidity, and vibration data in factory settings. IC Role / Device Role / Timing Role: Central MCU executing sensor fusion algorithms, managing CAN bus reporting, and handling USB-based configuration updates. Use Value: Integrated 12-bit ADCs and CAN/USB dual interfaces eliminate external protocol translators and reduce BOM count by 3 components. | Use Scenario: Brushless DC motor driver board with Hall-effect feedback and overcurrent protection. IC Role / Device Role / Timing Role: Real-time PWM generator with dead-time insertion and emergency stop input handling via EXTI. Use Value: Dedicated motor control timer ensures <100 ns PWM edge jitter - critical for minimizing torque ripple in closed-loop servo systems. |
| USB-Capable Data Logger | Automotive Diagnostic Tool |
Use Scenario: Portable field logger capturing analog waveforms and storing them to SD card via SPI. IC Role / Device Role / Timing Role: Host controller for USB mass storage class and SPI master for SD card interface. Use Value: On-chip USB 2.0 FS PHY enables direct PC connection for drag-and-drop firmware updates and log file retrieval without USB-to-UART bridge ICs. | Use Scenario: Handheld OBD-II scanner interfacing with vehicle ECU via CAN bus. IC Role / Device Role / Timing Role: CAN protocol handler with ISO 15765-2 compliance and USB HID interface for Android/iOS apps. Use Value: Dual CAN message buffers and hardware filtering reduce CPU load during high-traffic diagnostic sessions - sustaining >500 messages/sec throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F030F4P6 | ARM Cortex-M0, 48 MHz, 16 KB Flash, no CAN or USB | Lacks CAN/USB; limited to cost-sensitive, single-protocol applications | Select when CAN/USB are unnecessary and BOM cost is primary constraint |
| STM32F103C6T6 | Same package and pinout, but 32 KB Flash and 10 KB SRAM | Higher memory headroom for larger RTOS or protocol stacks | Choose when firmware complexity exceeds 16 KB or requires extended buffer space |
Compared with STM32F030F4P6, STM32F103C4T6A adds CAN/USB and higher CPU performance at modest cost increase; versus STM32F103C6T6, it trades memory capacity for tighter Flash utilization in resource-constrained deployments.
Availability
STM32F103C4T6A is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, USB-capable data loggers, and automotive diagnostic tools requiring stable component supply across long-lifecycle production programs.
Supply support for STM32F103C4T6A 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, specializing in microcontrollers, power management, and automotive-grade ICs.
This part belongs to the STM32F1 "Performance Line" - designed for cost-sensitive industrial and consumer applications demanding balanced processing power, analog integration, and dual-protocol connectivity (CAN + USB).
FAQ
What is the maximum operating frequency of the STM32F103C4T6A?
The STM32F103C4T6A achieves a maximum CPU clock frequency of 72 MHz using its internal PLL, driven by either the 8 MHz HSI RC oscillator or an external 4–16 MHz crystal. This frequency is validated across the full industrial temperature range (–40°C to +85°C) and 2.0–3.6 V supply voltage.
Does the STM32F103C4T6A support USB device functionality without external components?
Yes - the device integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on PA11/PA12. No external PHY, termination resistors, or pull-ups are required for standard USB device enumeration and CDC/DFU class operation.
How many analog input channels does the onboard ADC support?
The STM32F103C4T6A features two independent 12-bit ADCs (ADC1 and ADC2), each supporting up to 16 external input channels. In LQFP48 package, 10 pins are designated as ADC inputs (PA0–PA7, PB0, PB1), with additional channels accessible via alternate functions on other pins.
Is the STM32F103C4T6A pin-compatible with higher-memory variants like the C6T6?
Yes - the STM32F103C4T6A and STM32F103C6T6 share identical LQFP48 pinout, electrical characteristics, and peripheral register mapping. Firmware developed for the C4T6A runs unmodified on the C6T6, enabling seamless memory scalability within the same PCB layout.
STM32F103C4T6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 72MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- DMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT
- Number of I/O:
- 26
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F103C4T6A FAQ
1.How can I place an order for STM32F103C4T6A through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F103C4T6A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32F103C4T6A reliable?
The price and inventory of STM32F103C4T6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F103C4T6A is usually 5 days.
3.What payment methods are accepted for STM32F103C4T6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F103C4T6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F103C4T6A?
STM32F103C4T6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F103C4T6A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32F103C4T6A?
For technical support, including STM32F103C4T6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F103C4T6A requirements.
6.How does Aetrix verify that STM32F103C4T6A is sourced from the original manufacturer or authorized distributors?
All STM32F103C4T6A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32F103C4T6A meets industry standards.
7.What is the process for return or replacement of STM32F103C4T6A?
All STM32F103C4T6A units undergo pre-shipment inspection (PSI). If there is an issue with STM32F103C4T6A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32F103C4T6A part is unused and in its original packaging.
Return procedure for STM32F103C4T6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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