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STMicroelectronics STM32F103CBT7TR
- Part No.:
- STM32F103CBT7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F103CBT7TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,582
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Product details
Overview
STM32F103CBT7TR from STMicroelectronics is a medium-density performance-line Arm® Cortex®-M3 microcontroller featuring 128 KB Flash, 20 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed interface, and CAN 2.0B controller-used in industrial motor control, smart sensor nodes, and embedded HMI systems.
For engineers reviewing the STM32F103CBT7TR datasheet, STM32F103CBT7TR pinout, STM32F103CBT7TR application, or STM32F103CBT7TR equivalent, key selection criteria include Flash size (128 KB), USB/CAN dual-interface capability, LQFP48 package compatibility, and 12-bit dual ADC with temperature sensor integration.
Technical Context
The device implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide, supporting Thumb-2 instruction set for deterministic real-time execution. Its clock system integrates HSE (4–16 MHz), HSI (8 MHz factory-trimmed), LSE (32.768 kHz), and PLL for flexible system timing.
Peripheral interconnect uses AHB/APB buses with nested vectored interrupt controller (NVIC) supporting up to 68 interrupts. The memory map includes bit-band aliasing, boot loader support via system memory or embedded SRAM, and CRC calculation unit for firmware integrity verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 72 MHz max - enables deterministic real-time control with 1.25 DMIPS/MHz performance |
| Flash Memory | 128 KB - sufficient for complex firmware with bootloader, OTA update partition, and safety-critical code |
| SRAM | 20 KB - supports multiple RTOS tasks, communication buffers, and sensor data aggregation |
| ADC | 2 × 12-bit, 1 µs conversion - allows simultaneous sampling of motor phase currents and temperature |
| Timers | 7 timers including 3×16-bit general-purpose, 1×16-bit motor control PWM - enables field-oriented control (FOC) with dead-time insertion |
| Communication | USB 2.0 FS + CAN 2.0B + 3×USART + 2×I²C + 2×SPI - supports industrial gateway connectivity and diagnostics |
| Supply Range | 2.0–3.6 V - compatible with standard Li-ion battery packs and regulated 3.3 V power rails |
| Package | LQFP48 (7 × 7 mm) - surface-mountable with 0.5 mm pitch, suitable for compact PCB layouts |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®, rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3.3 V supply domains: analog (VDDA/VSSA) and digital (VDD/VSS) for noise isolation |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | 5 V-tolerant on most pins; configurable as EXTI sources, alternate functions, or analog inputs |
| PA9/PA10 | USB DM/DP | Dedicated full-speed USB transceiver pins requiring 1.5 kΩ pull-up on DP for enumeration |
| PD0/PD1 | CAN RX/TX | Direct connection to external CAN transceiver; supports 1 Mbit/s operation per ISO 11898-2 |
| PA1–PA4 | ADC1_IN1–ADC1_IN4 | Analog input channels mapped to internal temperature sensor and VREFINT reference |
| NRST | Reset input | Active-low reset with internal pull-up; accepts external push-button or supervisor IC assertion |
Key Features
| Feature | Design Value |
|---|---|
| Embedded CRC unit | Hardware-accelerated checksum generation for firmware image validation and data packet integrity |
| Temperature sensor | Integrated calibrated sensor (±1.5°C accuracy) enabling thermal monitoring without external components |
| DMA controller | 7-channel peripheral-to-memory/mem-to-mem transfer - offloads CPU during ADC sampling or USB bulk transfers |
| Low-power modes | Sleep/Stop/Standby with RTC retention on VBAT - extends battery life in wireless sensor endpoints |
| Debug interface | SWD and JTAG support - enables non-intrusive debugging, flash programming, and real-time trace via ST-LINK |
| 96-bit unique ID | Factory-programmed serial number - used for device authentication, license binding, and secure boot key derivation |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation with dead-time, and current sensing via dual ADC. Use Value: Enables precise torque regulation and energy-efficient operation using integrated motor control timer and 12-bit ADC. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ data. IC Role / Device Role / Timing Role: Sensor interface hub with I²C/SPI peripherals, low-power sleep scheduling, and USB/CAN for data upload. Use Value: Extends operational lifetime via Stop mode (2.5 µA typical) and integrates temperature compensation using on-die sensor. |
| Embedded HMI Controller | Automotive Diagnostic Tool |
Use Scenario: Touch-enabled dashboard display for industrial machinery with local logic and status feedback. IC Role / Device Role / Timing Role: GUI rendering engine, capacitive touch acquisition, and CAN bus communication with host PLC. Use Value: Supports responsive UI with 72 MHz CPU and dedicated DMA for display buffer updates and touch scan. | Use Scenario: Handheld OBD-II scanner interfacing with vehicle ECUs via CAN and USB host for PC reporting. IC Role / Device Role / Timing Role: CAN protocol stack processor, USB CDC virtual COM port bridge, and firmware-upgradable bootloader. Use Value: Eliminates external level translators with native 3.3 V CAN PHY interface and full-speed USB device stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F103C8T6 | 64 KB Flash, same LQFP48 package, identical peripherals except reduced RAM (20 KB retained) | Suitable for cost-sensitive designs where firmware footprint < 64 KB and no OTA update partition needed | Select when Flash budget permits simpler firmware and BOM cost reduction is critical |
| STM32F401CCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no CAN, added FPU and higher USB throughput | Better for floating-point math (e.g., FFT-based vibration analysis), but lacks native CAN for ECU diagnostics | Choose for signal processing intensity over automotive bus compatibility |
Compared with STM32F103CBT7TR, the C8T6 offers lower Flash capacity at reduced cost for constrained applications, while the F401CCU6 trades CAN for enhanced compute and memory-making the CBT7TR optimal for CAN+USB dual-interface industrial edge nodes.
Availability
STM32F103CBT7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and embedded HMI systems requiring stable component supply across multi-year production cycles.
Supply support for STM32F103CBT7TR 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, sensors, and automotive ICs.
The STM32F1 series targets cost-sensitive, high-reliability embedded applications demanding rich analog integration, real-time responsiveness, and industrial-grade robustness.
FAQ
What is the maximum operating frequency and associated power consumption in Run mode?
The STM32F103CBT7TR achieves 72 MHz CPU frequency with typical active current of 36 mA at 3.6 V (code from Flash, all peripherals enabled). This value scales linearly with voltage and clock speed, and can be reduced to 12 mA by disabling unused peripherals and lowering VDD to 2.0 V per datasheet Table 13.
Does this MCU support USB device mode without external PHY?
Yes - it integrates a full-speed USB 2.0 device controller with internal transceiver, requiring only passive termination (1.5 kΩ pull-up on DP) and no external PHY. It supports CDC, HID, and MSC classes via ST's USB library and HAL drivers.
How many external interrupt lines are available, and how are they mapped?
The device provides 16 external interrupt/event lines (EXTI0–EXTI15), each individually configurable to trigger on rising/falling edges or both. All GPIO pins PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, and PE0–PE15 can be mapped to these lines, enabling flexible wake-up and event handling across all ports.
What is the accuracy and calibration status of the internal temperature sensor?
The integrated temperature sensor has ±1.5°C accuracy over –40°C to +85°C (per DS5319 Rev 20, Table 51), factory-calibrated at two points (room temp and 110°C). Calibration values are stored in system memory at 0x1FFFF7AC and 0x1FFFF7B0 for runtime compensation in firmware.
STM32F103CBT7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F1
- Packaging:
- Tape & Reel (TR)
- 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:
- 37
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F103CBT7TR FAQ
1.How can I place an order for STM32F103CBT7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F103CBT7TR 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 STM32F103CBT7TR reliable?
The price and inventory of STM32F103CBT7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F103CBT7TR is usually 5 days.
3.What payment methods are accepted for STM32F103CBT7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F103CBT7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F103CBT7TR?
STM32F103CBT7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F103CBT7TR 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 STM32F103CBT7TR?
For technical support, including STM32F103CBT7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F103CBT7TR requirements.
6.How does Aetrix verify that STM32F103CBT7TR is sourced from the original manufacturer or authorized distributors?
All STM32F103CBT7TR 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 STM32F103CBT7TR meets industry standards.
7.What is the process for return or replacement of STM32F103CBT7TR?
All STM32F103CBT7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F103CBT7TR, 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 STM32F103CBT7TR part is unused and in its original packaging.
Return procedure for STM32F103CBT7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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