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STMicroelectronics STM32F103RET6
- Part No.:
- STM32F103RET6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F103RET6.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,196
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Product details
Overview
STM32F103RET6 from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 64 KB SRAM, USB 2.0 full-speed interface, CAN 2.0B controller, and three 12-bit ADCs with up to 21 channels - deployed in industrial motor control systems requiring real-time PWM generation, analog sensing, and fieldbus connectivity.
For engineers reviewing the STM32F103RET6 datasheet, STM32F103RET6 pinout, STM32F103RET6 application, or STM32F103RET6 equivalent, key selection criteria include its 72 MHz CPU clock, 112 I/O pins (5 V-tolerant), dual 12-bit DACs, flexible static memory controller (FSMC) for external NOR/PSRAM, and integrated temperature sensor with ±1.5°C accuracy over –40 to +85°C.
Technical Context
The STM32F103RET6 implements an Arm Cortex-M3 core with Harvard architecture, 3-stage pipeline, and hardware integer divider - enabling deterministic 1.25 DMIPS/MHz execution at 72 MHz with zero-wait-state Flash access. Its nested vectored interrupt controller (NVIC) supports 68 maskable interrupts with 16 programmable priority levels.
Peripheral integration includes a dual-channel FSMC supporting asynchronous/synchronous NOR/PSRAM/NAND with configurable timing registers, a dedicated SDIO interface compliant with SD 2.0/MMC 4.2, and two independent CAN 2.0B controllers with message filtering and FIFO buffering - all mapped to AHB/APB buses with DMA channel arbitration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 72 MHz max frequency - enables real-time deterministic control loops with sub-µs interrupt latency. |
| Memory | 512 KB Flash + 64 KB SRAM - sufficient for complex firmware with bootloader, communication stacks, and control algorithms. |
| ADC | 3 × 12-bit, 1 µs conversion time, 21-channel multiplexing - supports simultaneous sampling of motor phase currents and DC bus voltage. |
| DAC | 2 × 12-bit, monotonic output - used for analog reference generation or closed-loop feedback signal synthesis. |
| Timers | Up to 11 timers including 4 × 16-bit general-purpose, 2 × 16-bit motor control PWM with dead-time insertion - meets IEC 60335 Class B functional safety timing requirements. |
| Communication | USB 2.0 FS, CAN 2.0B, 5 × USART, 3 × SPI, 2 × I²C - enables dual-bus field device connectivity (CAN for fieldbus, USB for configuration). |
| I/O | 112 GPIO pins, 5 V-tolerant on all except analog inputs - simplifies level-shifting in mixed-voltage industrial I/O subsystems. |
| Supply Range | 2.0–3.6 V with POR/PDR and programmable voltage detector - ensures robust operation across wide input rail tolerances in factory environments. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified - suitable for automated SMT assembly and thermal management in compact industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3.3 V supply domains: VDDA for analog peripherals (ADC/DAC/temperature sensor), VDD for digital core and I/O - prevents noise coupling into precision analog paths. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 112 total GPIOs, each mappable to 16 EXTI lines and supporting alternate functions (USART, SPI, TIM, etc.) - enables flexible peripheral routing without PCB redesign. |
| OSC_IN / OSC_OUT | External crystal oscillator input/output | Supports 4–16 MHz quartz crystal - provides precise clock source for USB and CAN timing compliance (±0.25% tolerance required). |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 10 µs minimum pulse width - ensures reliable recovery from brown-out or watchdog timeout events. |
| BOOT0 / BOOT1 | Boot mode selection | Configures boot source (system memory, embedded Flash, or SRAM) at power-on - critical for in-field firmware updates via UART or USB DFU. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Static Memory Controller (FSMC) | 4 chip-select outputs with programmable read/write timing - enables direct interfacing to external LCD modules, SRAM-based data loggers, or FPGA co-processors. |
| Temperature Sensor | Calibrated ±1.5°C accuracy (–40 to +85°C), 10 mV/°C slope - provides board-level thermal monitoring without external components for fan control or derating logic. |
| Serial Wire Debug (SWD) | 2-pin debug interface with full SWO trace support - reduces debug footprint vs JTAG while retaining real-time instruction trace and variable watch capability. |
| CRC Calculation Unit | Hardware-accelerated 32-bit CRC-32 generator - offloads checksum computation for firmware OTA validation and communication frame integrity checks. |
| Embedded Trace Macrocell (ETM) | Instruction trace buffer with cycle-accurate execution logging - enables non-intrusive profiling of control loop timing and ISR latency in safety-critical applications. |
Applications
| Industrial Motor Drive | Smart Energy Meter |
|---|---|
Use Scenario: Closed-loop vector control of 3-phase BLDC motors with current sensing, position feedback, and thermal protection. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm at 20 kHz PWM carrier frequency using dual 16-bit motor control timers with synchronized ADC triggers. Use Value: Integrated dead-time generation and emergency stop input eliminate external gate driver logic, reducing BOM count and PCB area by 30%. |
Use Scenario: Polyphase electricity meter with metrology-grade ADC sampling, tariff switching, and secure communication via RS-485 and PLC. IC Role / Device Role / Timing Role: Simultaneous sampling of 6-channel analog inputs (voltage/current) using triple ADC interleaving and hardware oversampling. Use Value: On-chip 12-bit DAC generates precise calibration references for metrology ADC offset/gain correction, eliminating external DAC IC. |
| Automated Test Equipment (ATE) | Building Automation Controller |
Use Scenario: Modular signal generation and acquisition unit supporting arbitrary waveform output and high-speed transient capture. IC Role / Device Role / Timing Role: Dual 12-bit DACs generate synchronized analog test stimuli while 3 × ADCs capture response with 1 µs conversion and DMA-to-memory burst transfer. Use Value: 112 GPIOs configured as programmable digital I/O banks enable per-channel relay control and status reporting without external CPLD. |
Use Scenario: HVAC controller managing zone dampers, boiler modulation, and occupancy sensors across BACnet/IP and KNX interfaces. IC Role / Device Role / Timing Role: USB host interface loads configuration profiles; CAN handles field device communication; RTC maintains scheduling during power loss with VBAT backup. Use Value: Integrated RTC with calendar function and tamper-detection registers satisfies EN 15232 Class D energy monitoring requirements without external RTC IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F103VET6 | LQFP100 package, 100 GPIOs, same core/peripherals but larger pin count and 512 KB Flash. | Required when >64 GPIOs or additional FSMC address/data lines needed for external memory expansion. | Select if board layout accommodates 14 × 14 mm footprint and requires extra I/O for multi-sensor fusion or dual-display interfaces. |
| STM32F407VGT6 | Cortex-M4F core, 168 MHz, FPU, 1 MB Flash, 192 KB RAM, enhanced DSP instructions. | Suitable for audio processing, advanced motor control (e.g., predictive torque control), or real-time FFT-based diagnostics. | Choose only when floating-point math or >100 µs control loop latency is unacceptable - adds cost and power overhead for basic FOC tasks. |
Compared with STM32F103VET6, the RET6 offers identical functionality in a smaller LQFP64 package - ideal for space-constrained designs; versus STM32F407VGT6, it delivers lower power and cost for deterministic 72 MHz control without FPU dependency.
Availability
STM32F103RET6 is available at Aetrix Electronics and suitable for industrial motor drives, smart energy meters, automated test equipment, and building automation controllers requiring stable component supply across extended product lifecycles.
Supply support for STM32F103RET6 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 since 1987.
The STM32F1 series targets cost-sensitive, high-reliability industrial and consumer applications demanding rich analog integration, real-time responsiveness, and long-term supply stability - with the F103 line optimized for motor control and fieldbus connectivity.
FAQ
What is the maximum operating temperature range for STM32F103RET6?
The STM32F103RET6 is rated for industrial temperature range: –40°C to +85°C ambient. Its internal temperature sensor is calibrated across this range with ±1.5°C accuracy, and all electrical characteristics (e.g., ADC linearity, Flash write endurance) are guaranteed within these limits per DS5792 Rev 13 Section 5.3.1.
Does STM32F103RET6 support USB device mode without external PHY?
Yes - the part integrates a full-speed USB 2.0 device controller with on-chip transceiver, requiring only a single 1.5 kΩ pull-up resistor on D+ for enumeration. No external PHY or level shifter is needed, and it supports CDC, HID, and DFU classes out-of-box with ST's HAL library.
Can the FSMC interface drive standard parallel LCD modules?
Yes - the FSMC supports 8080 and 6800 parallel interface modes with programmable address/data setup/hold times. It directly drives common 8-/16-bit RGB or MCU-interface LCD panels (e.g., ILI9341, SSD1963) using dedicated FSMC_NWE, FSMC_NOE, and address strobes without glue logic.
How many independent CAN nodes can STM32F103RET6 support simultaneously?
The STM32F103RET6 contains one CAN 2.0B controller supporting up to 144 message objects in 14 mailboxes with FIFO buffering. It operates as a single CAN node - dual-node operation requires external CAN transceivers sharing the same bus or a second MCU; no second CAN peripheral is present on this variant.
STM32F103RET6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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:
- 51
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F103RET6 FAQ
1.How can I place an order for STM32F103RET6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F103RET6 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 STM32F103RET6 reliable?
The price and inventory of STM32F103RET6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F103RET6 is usually 5 days.
3.What payment methods are accepted for STM32F103RET6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F103RET6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F103RET6?
STM32F103RET6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F103RET6 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 STM32F103RET6?
For technical support, including STM32F103RET6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F103RET6 requirements.
6.How does Aetrix verify that STM32F103RET6 is sourced from the original manufacturer or authorized distributors?
All STM32F103RET6 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 STM32F103RET6 meets industry standards.
7.What is the process for return or replacement of STM32F103RET6?
All STM32F103RET6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F103RET6, 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 STM32F103RET6 part is unused and in its original packaging.
Return procedure for STM32F103RET6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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