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STMicroelectronics STM32F303C8T6
- Part No.:
- STM32F303C8T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F303C8T6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,195
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Product details
Overview
STM32F303C8T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 72 MHz, featuring 64 KB Flash, 12 KB SRAM with hardware parity, and integrated analog peripherals including two 12-bit ADCs (21-channel, 0.20 µs conversion), three 12-bit DACs, three rail-to-rail comparators, and one programmable-gain operational amplifier. It targets motor control, digital power conversion, and sensor fusion systems requiring real-time analog signal processing and precise timing.
For engineers reviewing the STM32F303C8T6 datasheet, STM32F303C8T6 pinout, STM32F303C8T6 application, or STM32F303C8T6 equivalent, key selection criteria include its dual ADC architecture with differential mode support, 18-capacitive-sensing channel TSC, CAN 2.0B interface, and 51 fast I/Os with interrupt mapping - all critical for closed-loop industrial actuation and touch-enabled HMI designs.
Technical Context
The STM32F303C8T6 implements an Arm Cortex-M4 core with single-cycle multiply and hardware divide, delivering 90 DMIPS at 72 MHz from CCM memory. Its interconnect matrix enables concurrent peripheral access without bus contention, supporting deterministic real-time execution in mixed-signal applications.
Analog subsystem integration includes independent voltage domains: VDDA (2.0–3.6 V) for ADC/DAC/COMP/OPAMP, with dedicated analog supply pins and internal reference (VREFINT). The OPAMP supports PGA mode with external feedback, and all three comparators feature programmable hysteresis and window mode - enabling robust overvoltage/undervoltage detection in power management circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 72 MHz max, 90 DMIPS - enables real-time DSP algorithms (e.g., PID, observer-based control) without external co-processor. |
| Flash / SRAM | 64 KB Flash (with ECC), 12 KB SRAM + 4 KB CCM SRAM (HW parity) - supports secure firmware storage and low-latency data buffering for time-critical ISR handling. |
| ADC | Two 12-bit ADCs, 21 channels total, 0.20 µs conversion, 12/10/8/6-bit selectable resolution - allows simultaneous sampling of motor phase currents and DC-link voltage with sub-microsecond latency. |
| DAC | Three 12-bit DACs, 2.4–3.6 V analog supply - provides independent analog outputs for reference generation, biasing, or waveform synthesis in power supply feedback loops. |
| Timers | 11 timers including advanced-control TIM1 (6-PWM + deadtime), two basic timers for DAC triggering, and RTC with alarm - supports field-oriented control (FOC) and periodic sensor calibration without CPU load. |
| Communication | CAN 2.0B, 3× USART (one with ISO7816/LIN/IrDA), I²C (Fast-mode Plus), SPI - enables interoperability with automotive ECUs, industrial sensors, and smart battery packs. |
| Analog Peripherals | 3× ultra-fast comparators (rail-to-rail), 1× OPAMP (PGA mode), 18-channel TSC - delivers hardware-accelerated overcurrent protection, gain-adjustable signal conditioning, and capacitive touch UI on a single die. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), ECOPACK®2-compliant, with 37 general-purpose I/Os (5 V-tolerant on selected pins), dedicated analog supply (VDDA/VSSA), and separate VBAT for RTC backup.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main digital power/ground | Supplies core logic (1.8–3.6 V); requires local decoupling per ST layout guidelines to maintain 72 MHz stability. |
| VDDA, VSSA | Analog power/ground | Isolated analog domain for ADC/DAC/OPAMP/COMP; must be filtered separately to achieve <1 LSB noise in 12-bit conversions. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PF0–PF1 | General-purpose I/O | 51 total GPIOs, all mappable to EXTI; up to 37 available in LQFP48 package - enables flexible peripheral remapping for PCB routing optimization. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11, PC0–PC5, PC10, PC11, PC12, PD2 | ADC input channels | Supports up to 21 single-ended or 10 differential ADC inputs - allows full 3-phase motor current sensing plus temperature/voltage monitoring in compact drives. |
| PA4, PA5, PA6 | DAC outputs | Three independent 12-bit buffered outputs (DAC1_OUT1, DAC1_OUT2, DAC2_OUT1) - usable as precision references or analog waveform generators with 1 µs settling time. |
| PA0, PA1, PA2, PA3, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC5, PC10, PC11, PC12, PD2 | TSC channels | 18 capacitive sensing inputs mapped across GPIOs - enables touchkey, slider, and rotary encoder interfaces without external ICs. |
| PA11, PA12, PB8, PB9 | CAN_TX/CAN_RX, I²C_SCL/I²C_SDA | Dedicated alternate function pins with internal pull-ups/downs - simplifies bus termination and reduces BOM count for industrial fieldbus nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable-gain op-amp (PGA) | Configurable gain (1–16×) with external feedback resistors; all terminals accessible - enables adjustable signal amplification before ADC digitization without external op-amp stage. |
| Dual fast ADC with interleaved mode | Simultaneous sampling of two channels at 3.6 MSPS aggregate rate - supports synchronized current/voltage acquisition for vector control in BLDC/PMSM inverters. |
| Advanced-control timer (TIM1) | 6-channel complementary PWM with programmable deadtime (1–1023 × tCLK) and emergency stop - ensures safe gate driving for 3-phase bridge topologies under fault conditions. |
| Capacitive touch sensing controller (TSC) | Hardware-accelerated charge-transfer measurement across 18 channels; immunity to humidity and ESD - eliminates need for dedicated touch IC in HMI panels and appliance controls. |
| Temperature sensor + VREFINT | Calibrated on-chip temperature sensor (±1.5°C accuracy) and internal 1.2 V reference - enables self-calibrating thermal monitoring and ADC reference stabilization without external components. |
Applications
| Motor Control System | Digital Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC motors in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, simultaneous ADC sampling of phase currents and DC-link voltage, and generation of 6-channel PWM with deadtime. Use Value: Integrated dual ADCs with differential mode and TIM1's hardware deadtime enable <5 µs current loop response time and eliminate external gate driver safety logic. | Use Scenario: Isolated AC/DC or DC/DC converter with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: Analog sensing of output voltage/current, comparator-based overvoltage/overcurrent trip, and DAC-driven reference adjustment. Use Value: Three DACs provide programmable reference voltages for multiple regulation loops; rail-to-rail comparators trigger shutdown within 50 ns, meeting IEC 62368-1 safety response requirements. |
| Capacitive Touch HMI | Industrial Sensor Node |
Use Scenario: Touch-enabled user interface for medical devices and home appliances with waterproof overlay support. IC Role / Device Role / Timing Role: Capacitive sensing controller (TSC) scanning 12-key matrix and linear slider, coupled with USB or UART communication to host MCU. Use Value: Hardware TSC handles touch acquisition autonomously, reducing CPU load to <5% during active scanning and enabling low-power standby with wake-on-touch. | Use Scenario: Wireless sensor node measuring temperature, pressure, and vibration in predictive maintenance systems. IC Role / Device Role / Timing Role: Signal conditioning (OPAMP PGA), analog-to-digital conversion (ADC), RTC-triggered periodic sampling, and CAN bus reporting. Use Value: Integrated OPAMP and ADC eliminate external signal chain components; RTC alarm wakes CPU only for scheduled measurements, extending battery life to >5 years on coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F303K8T6 | LQFP32 package (32-pin), 25 GPIOs, no CAN interface, same core/peripherals otherwise | Suitable for space-constrained, cost-sensitive designs without fieldbus connectivity | Select when PCB area is limited and CAN is not required; verify pin compatibility for existing LQFP48 layouts. |
| STM32F072CBT6 | Cortex-M0 core (48 MHz), 128 KB Flash, 16 KB SRAM, single 12-bit ADC (16 ch), no DAC/OPAMP/COMP | Lower-cost entry-level control for non-analog-intensive applications like LED drivers or simple PLC I/O | Choose only if analog subsystem requirements are minimal; lacks hardware acceleration for motor control or touch sensing. |
Compared with STM32F303K8T6, the C8T6 adds CAN and 12 extra GPIOs in LQFP48 - essential for distributed industrial networks. Versus STM32F072CBT6, it delivers 1.5× higher compute throughput, dual ADCs, and full analog front-end - making it irreplaceable for closed-loop analog-digital hybrid systems.
Availability
STM32F303C8T6 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, capacitive touch HMIs, and industrial sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for STM32F303C8T6 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, specializing in microcontrollers, power management, analog, and MEMS technologies for industrial, automotive, and consumer markets.
The STM32F3 series targets cost-sensitive, analog-rich embedded applications - designed specifically to integrate high-precision signal conditioning, real-time control, and human interface functions into a single chip for motor drives, digital power, and smart sensors.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32F303C8T6 achieves 72 MHz maximum CPU frequency using its internal PLL, which multiplies the 8 MHz HSI oscillator or an external crystal (4–32 MHz) with configurable pre-divider and multiplier values. Stable operation requires proper decoupling on VDD/VDDA and adherence to ST's clock tree configuration sequence in startup code.
Does this MCU support hardware CRC calculation and why does it matter?
Yes, it includes a dedicated CRC calculation unit compliant with IEEE-802.3, supporting 7/8/16/32-bit polynomials. This enables real-time integrity checking of firmware images during OTA updates or Flash memory blocks during runtime - critical for functional safety compliance (IEC 61508 SIL-2) in industrial control applications.
How many analog channels can be sampled simultaneously and what is the minimum conversion time?
Two ADCs can operate in interleaved mode to sample up to two channels simultaneously at aggregate 3.6 MSPS, achieving 0.20 µs per 12-bit conversion. This enables synchronized acquisition of motor phase currents and bus voltage - essential for accurate torque estimation in FOC algorithms without software synchronization overhead.
What debug interfaces are supported and are they available in production firmware?
It supports Serial Wire Debug (SWD) and JTAG via dedicated SWDIO/SWCLK or JTCK/JTDI/JTDO/JTMS pins. Debug access remains enabled in production unless explicitly disabled via option bytes; SWD is preferred for minimal pin count (2-wire) and full functionality including flash programming and real-time variable watch.
STM32F303C8T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F3
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 72MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 11x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F303C8T6 FAQ
1.How can I place an order for STM32F303C8T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F303C8T6 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 STM32F303C8T6 reliable?
The price and inventory of STM32F303C8T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F303C8T6 is usually 5 days.
3.What payment methods are accepted for STM32F303C8T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F303C8T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F303C8T6?
STM32F303C8T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F303C8T6 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 STM32F303C8T6?
For technical support, including STM32F303C8T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F303C8T6 requirements.
6.How does Aetrix verify that STM32F303C8T6 is sourced from the original manufacturer or authorized distributors?
All STM32F303C8T6 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 STM32F303C8T6 meets industry standards.
7.What is the process for return or replacement of STM32F303C8T6?
All STM32F303C8T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F303C8T6, 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 STM32F303C8T6 part is unused and in its original packaging.
Return procedure for STM32F303C8T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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