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STMicroelectronics STM32F303CBT7TR
- Part No.:
- STM32F303CBT7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F303CBT7TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,211
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Product details
Overview
STM32F303CBT7TR from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 72 MHz, featuring 128 KB Flash, 40 KB SRAM (with HW parity on first 16 KB), 4x 12-bit ADCs (0.20 µs conversion), 2x 12-bit DACs, and 7 rail-to-rail comparators - deployed in motor control systems requiring real-time analog signal conditioning and PWM generation.
For engineers reviewing the STM32F303CBT7TR datasheet, STM32F303CBT7TR pinout, STM32F303CBT7TR application, or STM32F303CBT7TR equivalent, key selection criteria include integrated op-amps in PGA mode, capacitive touch sensing support (24 channels), CAN 2.0B interface, and dual 16-bit advanced timers with deadtime generation for three-phase inverter control.
Technical Context
The device integrates a Cortex-M4 core with single-cycle multiply, hardware divide, DSP instructions, and MPU for deterministic real-time execution. Its analog subsystem includes four operational amplifiers configurable as programmable-gain amplifiers (PGA) with all terminals accessible, plus seven fast comparators and two 12-bit DACs - all sharing a common analog supply range of 2.4–3.6 V.
Clock architecture supports multiple sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, 8 MHz HSI with PLL (up to 72 MHz), and 40 kHz LSI. Peripheral interconnect matrix enables flexible routing of ADC triggers, timer outputs, and comparator events without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 72 MHz max - enables real-time DSP math (e.g., Clarke/Park transforms) in motor control firmware. |
| Flash / SRAM | 128 KB Flash + 40 KB SRAM (16 KB with HW parity) - sufficient for field-oriented control (FOC) algorithms with safety checksums. |
| ADC | Four 12-bit ADCs, 0.20 µs conversion, up to 39 channels - supports simultaneous sampling of phase currents and DC bus voltage. |
| DAC | Two 12-bit DAC channels, 2.4–3.6 V analog supply - used for analog reference generation or sensor calibration signals. |
| Timers | 13 timers including two 16-bit advanced-control timers with 6-channel PWM, deadtime, emergency stop - essential for IGBT/MOSFET gate driving in inverters. |
| Op-Amps / Comparators | Four PGA-capable op-amps + seven rail-to-rail comparators - enables current sensing amplifier stages and overcurrent protection circuits. |
| Communication | CAN 2.0B, five USART/UART, three SPI (two with I2S), USB FS - supports industrial fieldbus connectivity and human-machine interface (HMI) integration. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin quad flat lead frame suitable for reflow assembly and thermal management in compact motor drives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core power supply / ground | 3.3 V nominal operation; separate VDDA/VSSA required for analog peripherals to ensure noise isolation. |
| VREF+, VREF– | Analog reference inputs | Enable external precision reference for ADC/DAC; internal VREFINT available if unused. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | Up to 87 fast I/Os; multiple pins support 5 V-tolerant digital inputs - simplifies level-shifting with legacy sensors. |
| PA1, PA2, PA3, etc. | ADC/DAC/OPAMP channel inputs | Specific pins mapped to analog peripherals (e.g., PA0 = ADC1_IN0, PA4 = DAC1_OUT1) - requires precise PCB routing to minimize crosstalk. |
| PE13–PE15, PF0–PF1 | Advanced timer channel outputs | Drive complementary PWM pairs (e.g., TIM1_CH1/CH1N) with programmable deadtime - critical for preventing shoot-through in half-bridge topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable-gain amplifiers (PGAs) | Four op-amps with gain selectable via register (1–16×); all terminals accessible - eliminates external gain-setting resistors in current-sense front-ends. |
| Capacitive touch sensing (TSC) | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI on industrial panels without additional ICs. |
| Hardware CRC unit | Dedicated peripheral computes CRC-32 over memory blocks - accelerates firmware integrity checks and secure boot verification. |
| Memory protection unit (MPU) | Configurable regions enforce privilege/access rules - isolates RTOS tasks and prevents stack overflow corruption in safety-critical firmware. |
| RTC with calibration | 32 kHz LSE-backed calendar RTC with ±1 ppm calibration - maintains accurate timekeeping across temperature for data-logging applications. |
Applications
| Motor Control System | Industrial HMI Panel |
|---|---|
Use Scenario: Three-phase BLDC motor drive with field-oriented control (FOC) and overcurrent protection. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, generating synchronized PWM, sampling current/voltage, and managing fault shutdown. Use Value: Integrated PGAs and comparators reduce BOM count by eliminating discrete current-sense amplifier and comparator ICs; advanced timers enable precise deadtime control. | Use Scenario: Touch-enabled operator interface for PLC-controlled machinery with local data logging. IC Role / Device Role / Timing Role: Primary MCU handling capacitive touch scanning, display refresh, CAN communication with PLC, and RTC-stamped event logging. Use Value: 24-channel TSC supports multi-touch buttons and sliders; CAN 2.0B ensures robust fieldbus interoperability; 128 KB Flash stores GUI assets and firmware updates. |
| Energy Monitoring Unit | Medical Sensor Interface |
Use Scenario: DIN-rail mounted power meter measuring voltage, current, and harmonic content in commercial buildings. IC Role / Device Role / Timing Role: Signal acquisition hub digitizing isolated analog inputs via 4 ADCs, computing RMS/power metrics, and transmitting via UART/USB. Use Value: Simultaneous sampling across 4 ADCs enables phase-aligned measurements; HW parity on SRAM ensures data integrity during long-term logging. | Use Scenario: Portable patient monitor acquiring ECG, temperature, and SpO₂ signals with low-power operation. IC Role / Device Role / Timing Role: Analog front-end processor performing signal conditioning (PGA), ADC conversion, and real-time filtering before Bluetooth transmission. Use Value: PGA op-amps provide programmable gain for varying electrode impedances; ultra-low standby current (<1 µA) extends battery life between readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F303K8T6 | QFN32 package, 64 KB Flash, no DAC, only 2 ADCs | Suitable for space-constrained cost-sensitive motor control without analog output needs | Select when footprint and BOM cost outweigh need for DACs and full ADC channel count. |
| STM32F334R8T6 | Same LQFP64 package, 64 KB Flash, enhanced high-resolution timer (HRTIM), no PGA op-amps | Optimized for digital power supply control (e.g., LLC resonant converters) requiring sub-nanosecond timing | Prefer for switch-mode power supply designs where HRTIM timing precision matters more than analog signal chain integration. |
Compared with STM32F303K8T6 and STM32F334R8T6, the STM32F303CBT7TR uniquely balances high analog integration (4 ADCs, 2 DACs, 4 PGAs, 7 comparators) with motor-control-optimized timers in a standard LQFP64 footprint - making it optimal for cost-sensitive yet feature-rich embedded motion systems.
Availability
STM32F303CBT7TR is available at Aetrix Electronics and suitable for motor control systems, industrial HMIs, energy monitoring units, and medical sensor interfaces requiring stable component supply and long-term production continuity.
Supply support for STM32F303CBT7TR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.
The STM32F3 series targets cost-sensitive industrial and consumer applications demanding high analog integration and real-time performance - specifically engineered for motor control, digital power conversion, and human-machine interface systems.
FAQ
What is the maximum operating frequency and supported voltage range for STM32F303CBT7TR?
The STM32F303CBT7TR operates at up to 72 MHz using its internal PLL and supports a VDD supply range of 2.0 V to 3.6 V. The analog supply (VDDA) must be within 2.4 V to 3.6 V for DAC, ADC, and op-amp functionality. Absolute maximum ratings specify VDD/VDDA ≤ 4.0 V, and operation outside the 2.0–3.6 V range may cause functional failure or reduced lifetime.
Does STM32F303CBT7TR support hardware-based cryptographic acceleration?
No, the STM32F303CBT7TR does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, ST's STM32L4+, STM32G0, or STM32H7 families offer AES-128/256, HASH, and PKA peripherals - the F3 series prioritizes analog/motor control features over security acceleration.
Can the integrated op-amps be used as standalone instrumentation amplifiers?
No - the four op-amps are general-purpose and lack built-in instrumentation amplifier topology (i.e., no dedicated reference pin or fixed-gain resistor network). However, they can be externally configured as in-amps using discrete resistors, or used in PGA mode with programmable gain (1×–16×) and selectable input routing - ideal for current-sense amplification but not drop-in replacement for dedicated in-amp ICs.
What debug interfaces are supported, and is SWD sufficient for full development?
The STM32F303CBT7TR supports Serial Wire Debug (SWD) and JTAG via its SWJ-DP interface. SWD is fully sufficient for programming, real-time debugging, and trace (via ETM) - requiring only two pins (SWCLK, SWDIO) and optional NRST. No external debug probe beyond ST-LINK/V2 or compatible is needed; SWD provides full register access, flash programming, and breakpoint capability identical to JTAG.
STM32F303CBT7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F3
- Packaging:
- Tape & Reel (TR)
- 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, USB
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 15x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F303CBT7TR FAQ
1.How can I place an order for STM32F303CBT7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F303CBT7TR 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 STM32F303CBT7TR reliable?
The price and inventory of STM32F303CBT7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F303CBT7TR is usually 5 days.
3.What payment methods are accepted for STM32F303CBT7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F303CBT7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F303CBT7TR?
STM32F303CBT7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F303CBT7TR 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 STM32F303CBT7TR?
For technical support, including STM32F303CBT7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F303CBT7TR requirements.
6.How does Aetrix verify that STM32F303CBT7TR is sourced from the original manufacturer or authorized distributors?
All STM32F303CBT7TR 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 STM32F303CBT7TR meets industry standards.
7.What is the process for return or replacement of STM32F303CBT7TR?
All STM32F303CBT7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F303CBT7TR, 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 STM32F303CBT7TR part is unused and in its original packaging.
Return procedure for STM32F303CBT7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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