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STMicroelectronics STM32F105RCT6
- Part No.:
- STM32F105RCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F105RCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:470
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Product details
Overview
STM32F105RCT6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP64 package, featuring 256 KB Flash, 64 KB SRAM, dual CAN 2.0B interfaces, USB OTG FS with on-chip PHY, and 10/100 Ethernet MAC with IEEE 1588 support - deployed in industrial gateways requiring real-time protocol bridging and deterministic network I/O.
For engineers reviewing the STM32F105RCT6 datasheet, STM32F105RCT6 pinout, STM32F105RCT6 application, or STM32F105RCT6 equivalent, key selection criteria include dual-CAN + Ethernet coexistence, 72 MHz deterministic execution, 2×12-bit ADCs with 1 µs conversion, and SWD/JTAG debug support for field-upgradable connectivity nodes.
Technical Context
The STM32F105RCT6 integrates a single ARM Cortex-M3 core running at up to 72 MHz with 1.25 DMIPS/MHz performance, hardware division, and single-cycle multiplication. Its memory subsystem includes 256 KB of embedded Flash (with error correction), 64 KB of general-purpose SRAM, and 4 KB dedicated Ethernet SRAM plus 512 bytes for CAN message RAM.
It implements full-duplex 10/100 Ethernet MAC with MII/RMII physical layer support, dual independent CAN 2.0B controllers with programmable bit timing, and USB OTG FS host/device capability with HNP/SRP/ID detection - all managed via a 12-channel DMA controller supporting concurrent peripheral transfers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 72 MHz - enables hard real-time task scheduling with ≤1 µs interrupt latency in deterministic applications. |
| Flash / SRAM | 256 KB Flash + 64 KB SRAM - sufficient for dual-protocol stacks (CANopen + TCP/IP) with bootloader and firmware update partitioning. |
| ADC | 2 × 12-bit, 1 µs conversion, 16-channel - supports simultaneous sampling of analog sensor inputs and power monitoring rails. |
| Ethernet Interface | 10/100 MAC with IEEE 1588 hardware timestamping - delivers sub-microsecond time synchronization for industrial motion control networks. |
| CAN Interfaces | 2 × CAN 2.0B controllers with 512-byte dedicated SRAM - enables concurrent CAN FD-ready bus management and gateway bridging between isolated networks. |
| USB OTG FS | Full-speed device/host/OTG with on-chip PHY and 1.25 KB SRAM - eliminates external transceiver for field-service USB configuration and firmware recovery. |
| DMA Channels | 12-channel controller - offloads data movement for Ethernet RX/TX, CAN message buffers, and ADC/DAC streams without CPU cycles. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, rated for industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Separate analog/digital domains with dedicated VDDA/VSSA pins ensure <1 LSB ADC noise under mixed-signal operation. |
| PA0–PA15, PB0–PB15, PC13–PC15, PD0–PD2 | General-purpose I/O | Up to 51 5V-tolerant GPIOs with remappable alternate functions - supports flexible PCB routing for Ethernet PHY, CAN transceivers, and debug headers. |
| PA11/PA12 | USB DP/DM | Dedicated full-speed USB differential pair with internal pull-ups - enables plug-and-play device enumeration without external components. |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface - provides non-intrusive real-time debugging and flash programming using standard ST-LINK probes. |
| PA15/PB3/PB4 | JTAG TDI/TDO/TMS/TCK | Full JTAG boundary scan capability - supports production test and failure analysis in automated assembly lines. |
| PH0/PH1 | HSE_IN/HSE_OUT | External 4–25 MHz crystal oscillator input/output - enables precise clock sourcing for Ethernet MAC and USB timing compliance. |
| PC1/PC4/PC5 | ETH_MDC/ETH_MDIO/ETH_CRS_DV | Ethernet Media Independent Interface signals - directly interfaces with standard RMII PHY chips (e.g., LAN8720A) without level-shifting. |
| PB8/PB9 | CAN1_RX/CAN1_TX | Dual CAN transceiver interface pins - support galvanically isolated CAN bus design with common-mode choke and TVS protection. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded Trace Macrocell (ETM) | Enables instruction-level trace capture over SWO pin for cycle-accurate profiling of real-time Ethernet/CAN protocol stacks. |
| Programmable Voltage Detector (PVD) | Configurable trip point (2.2–2.9 V) triggers interrupt before brown-out - ensures safe shutdown of Ethernet link and CAN message buffering. |
| CRC Calculation Unit | Hardware-accelerated CRC-32 generation - validates Ethernet frame payloads and firmware image integrity in <1 µs per 32-bit word. |
| Temperature Sensor | Calibrated ±1.5 °C accuracy across –40 to +85 °C - monitors die temperature during sustained Ethernet transmit bursts or CAN bus arbitration stress. |
| Remappable Alternate Functions | All communication peripherals (USART, SPI, I2C, CAN, USB, ETH) support full pin remapping - simplifies layout by avoiding signal congestion near high-speed interfaces. |
Applications
| Industrial Ethernet Gateway | Automotive Diagnostic Tool |
|---|---|
Use Scenario: Protocol translation between CAN FD vehicle networks and Modbus TCP industrial PLCs. IC Role / Device Role / Timing Role: Dual-CAN + Ethernet co-processor managing time-critical message forwarding with IEEE 1588-synchronized timestamps. Use Value: Eliminates external FPGA or dual-MCU architecture while maintaining <100 µs end-to-end latency for safety-critical diagnostics. |
Use Scenario: Handheld OBD-II scanner supporting UDS, KWP2000, and DoIP protocols over USB and Wi-Fi bridge. IC Role / Device Role / Timing Role: Host controller executing ISO 14229 stack with USB CDC ACM interface for PC communication and CAN bus arbitration. Use Value: Single-chip solution reduces BOM cost by 35% versus discrete MCU + USB bridge + CAN transceiver designs. |
| Smart Grid RTU | Building Automation Controller |
Use Scenario: Remote terminal unit collecting meter data via RS-485 Modbus and reporting over Ethernet to SCADA. IC Role / Device Role / Timing Role: Deterministic scheduler managing 10+ UART-based fieldbus interfaces while servicing Ethernet TCP/IP stack and watchdog supervision. Use Value: 72 MHz core with 256 KB Flash accommodates dual-stack (IPv4/IPv6) and secure boot without external memory expansion. |
Use Scenario: HVAC controller integrating BACnet MS/TP, LonWorks, and KNX interfaces with local web UI served over Ethernet. IC Role / Device Role / Timing Role: Real-time I/O manager synchronizing analog sensor reads (temperature/humidity), PWM fan control, and multi-protocol gateway logic. Use Value: Integrated 2×12-bit ADCs and DACs eliminate external converters, reducing component count and calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar connectivity-focused microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F107VCT6 | LQFP100 package, adds 2 more USARTs and 1 extra SPI; same core/peripherals but larger footprint and higher pin count. | Required when >5 serial interfaces or >80 GPIOs needed for complex backplane I/O expansion. | Select only if LQFP100 board space and routing complexity are acceptable trade-offs for additional peripheral density. |
| NXP LPC1788FBD208 | ARM Cortex-M3 @ 120 MHz, 512 KB Flash, no integrated Ethernet MAC - requires external PHY and external CAN controller. | Suitable for cost-sensitive designs where Ethernet PHY selection flexibility outweighs integration benefit. | Choose when custom PHY timing tuning or multi-vendor CAN transceiver compatibility is mandatory. |
Compared with STM32F107VCT6, the STM32F105RCT6 offers identical peripheral functionality in a smaller LQFP64 package - ideal for space-constrained gateways. Versus LPC1788FBD208, it delivers lower system-level BOM cost and reduced layout risk through native Ethernet and dual-CAN integration.
Availability
STM32F105RCT6 is available at Aetrix Electronics and suitable for industrial gateways, automotive diagnostic tools, smart grid RTUs, and building automation controllers requiring stable component supply across extended product lifecycles.
Supply support for STM32F105RCT6 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, sensors, and automotive ICs with vertical manufacturing capabilities.
The STM32F105xx series belongs to ST's Connectivity Line - designed specifically for embedded applications demanding simultaneous high-speed wired interfaces (Ethernet, USB, CAN) with deterministic real-time performance and industrial-grade reliability.
FAQ
Does STM32F105RCT6 support USB Device Mode without external PHY?
Yes. The part integrates a full-speed USB OTG FS transceiver with on-chip PHY, enabling direct connection to USB cables via PA11 (DP) and PA12 (DM). No external transceiver is required for device mode operation, and internal pull-ups simplify enumeration.
What is the maximum achievable Ethernet throughput using the built-in MAC?
The 10/100 Ethernet MAC supports line-rate transmission at 100 Mbps in full-duplex mode when paired with an RMII-compliant PHY (e.g., LAN8720A) and configured with dedicated 4 KB SRAM for descriptor management. Real-world throughput reaches ~94 Mbps with TCP/IP stack overhead.
Can both CAN interfaces operate simultaneously while Ethernet is active?
Yes. All three interfaces - CAN1, CAN2, and Ethernet - operate concurrently using independent DMA channels and dedicated SRAM blocks (512 bytes for each CAN, 4 KB for Ethernet). No resource contention occurs under full-load conditions.
Is the internal 8 MHz RC oscillator accurate enough for USB timing requirements?
No. USB full-speed operation requires ±0.25% clock accuracy; the internal 8 MHz RC has ±1% typical variation. An external 4–25 MHz crystal (e.g., 8 MHz or 25 MHz) must be used with the HSE oscillator circuit to meet USB timing specifications.
STM32F105RCT6 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 OTG
- Peripherals:
- DMA, POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 256KB (256K 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:
STM32F105RCT6 FAQ
1.How can I place an order for STM32F105RCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F105RCT6 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 STM32F105RCT6 reliable?
The price and inventory of STM32F105RCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F105RCT6 is usually 5 days.
3.What payment methods are accepted for STM32F105RCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F105RCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F105RCT6?
STM32F105RCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F105RCT6 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 STM32F105RCT6?
For technical support, including STM32F105RCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F105RCT6 requirements.
6.How does Aetrix verify that STM32F105RCT6 is sourced from the original manufacturer or authorized distributors?
All STM32F105RCT6 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 STM32F105RCT6 meets industry standards.
7.What is the process for return or replacement of STM32F105RCT6?
All STM32F105RCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F105RCT6, 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 STM32F105RCT6 part is unused and in its original packaging.
Return procedure for STM32F105RCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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