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STMicroelectronics STM32F105RCT6V

Name: STM32F105RCT6V
Brand: STMicroelectronics
SKU: STM32F105RCT6V
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32F105RCT6V

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-LQFP

Datasheet:: STM32F105RCT6V.pdf

Description:: IC MCU 32BIT 256KB FLASH 64LQFP

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Product details

Overview

STM32F105RCT6V 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-designed for industrial connectivity gateways requiring real-time protocol bridging and deterministic network I/O.

For engineers reviewing the STM32F105RCT6V datasheet, STM32F105RCT6V pinout, STM32F105RCT6V application, or STM32F105RCT6V equivalent, key selection criteria include Ethernet MAC + dual CAN coexistence, 72 MHz deterministic execution with SWD/JTAG debug, and 2×12-bit ADCs with temperature sensor for embedded control monitoring.

Technical Context

The device integrates a single ARM Cortex-M3 core with Harvard bus architecture, supporting zero-wait-state execution at 72 MHz and hardware division/multiplication. Its memory subsystem includes 256 KB of Flash (with error correction), 64 KB of SRAM, and dedicated 4 KB Ethernet SRAM plus 512 bytes per CAN controller.

Connectivity peripherals are fully independent: the 10/100 Ethernet MAC uses dedicated DMA and supports MII/RMII physical layer interfaces; both CAN controllers operate concurrently with separate 512-byte SRAM buffers; USB OTG FS includes integrated PHY and supports HNP/SRP/ID for dual-role operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	ARM Cortex-M3 @ 72 MHz, 1.25 DMIPS/MHz - enables real-time deterministic task scheduling in protocol stacks.
Flash / SRAM	256 KB Flash + 64 KB SRAM - sufficient for dual-protocol firmware (e.g., CANopen + TCP/IP) with bootloader and OTA update space.
Ethernet Interface	10/100 MAC with IEEE 1588 hardware timestamping and 4 KB dedicated SRAM - supports precise time-synchronized industrial networking.
CAN Interfaces	2 × CAN 2.0B controllers, each with 512 bytes dedicated SRAM - allows concurrent CAN FD-capable (2.0B Active) bus management without CPU overhead.
USB Interface	USB 2.0 Full-Speed OTG with on-chip PHY and 1.25 KB dedicated SRAM - enables host/device role switching without external transceiver.
Analog Peripherals	2 × 12-bit ADCs (16-channel, 1 µs conversion), 2 × 12-bit DACs, integrated temperature sensor - supports closed-loop analog I/O in motor or power control.
Timers	10 timers including 4 × 16-bit general-purpose, 1 × motor-control PWM with dead-time generation, 2 × watchdogs - meets functional safety timing requirements.

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 / ground	Dual 2.0–3.6 V supply domains with internal regulator; decoupling required per datasheet layout guidelines.
PA0–PA15, PB0–PB15, PC13–PC15, PD0–PD2	General-purpose I/O	Up to 51 5 V-tolerant pins with remappable alternate functions - enables flexible PCB routing for mixed-signal interface assignment.
PA11/PA12	USB DP/DM	Dedicated full-speed USB differential pair with internal transceiver - eliminates need for external USB PHY.
PA1–PA7, PB8–PB9	CAN1_TX/CAN1_RX, CAN2_TX/CAN2_RX	Two independent CAN physical layer interfaces - supports redundant or multi-bus automotive/industrial networks.
PC1–PC4, PA0, PB11–PB12	RMII Ethernet signals (REF_CLK, CRS_DV, RXD0–RXD1, TXD0–TXD1, TX_EN)	Direct RMII interface to PHY chip - reduces BOM count and simplifies 10/100 Ethernet integration.

Key Features

Feature	Design Value
Nested Vectored Interrupt Controller (NVIC)	Supports 68 interrupt channels with programmable priority - enables low-latency response to CAN/Ethernet packet events.
CRC calculation unit	Hardware-accelerated CRC-32 generator - offloads checksum computation for Ethernet frame and firmware image validation.
Serial Wire Debug (SWD)	2-pin debug interface with trace capability - enables non-intrusive real-time debugging of multi-threaded connectivity stacks.
Remappable alternate functions	All communication peripherals (USART, SPI, I2C, CAN, USB, Ethernet) support pin remapping - improves PCB layout flexibility and EMI mitigation.
Temperature sensor	Calibrated on-die sensor with ±1.5°C accuracy (0–100°C) - provides thermal monitoring for fan control or derating logic in enclosed gateways.

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: Central MCU executing dual-stack firmware with real-time CAN message buffering and Ethernet packet assembly.

Use Value: Dual CAN + Ethernet MAC enables simultaneous bus arbitration and TCP/IP stack processing without external bridge ICs.

Use Scenario: Handheld OBD-II scanner supporting UDS, KWP2000, and DoIP over USB/Ethernet.

IC Role / Device Role / Timing Role: Host controller managing concurrent CAN diagnostics, USB CDC virtual COM, and Ethernet-based remote flash programming.

Use Value: Integrated USB OTG + dual CAN + 72 MHz core allows single-chip implementation of multi-interface diagnostic firmware.

Smart Grid Communication Node

Factory Automation Edge Controller

Use Scenario: Substation RTU aggregating data from IEC 61850 GOOSE over Ethernet and DLMS/COSEM over CAN.

IC Role / Device Role / Timing Role: Time-critical packet forwarding engine with IEEE 1588 timestamping and CAN message filtering.

Use Value: Hardware timestamping and dedicated CAN/Ethernet SRAM ensure sub-millisecond synchronization accuracy for grid protection logic.

Use Scenario: Compact PLC module controlling servo drives via CANopen while reporting status via MQTT over Ethernet.

IC Role / Device Role / Timing Role: Real-time motion controller with deterministic timer interrupts and analog feedback acquisition.

Use Value: 2×12-bit ADCs + motor-control PWM timer + dual CAN enable closed-loop position control without external analog front-end.

Equivalent & Alternatives

The following parts are listed as comparable options for similar connectivity microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F107VCT6	LQFP100 package, same peripheral set but 80 I/Os and no USB OTG host capability - lacks on-chip USB PHY.	Requires external USB transceiver for host mode; better suited for high-pin-count Ethernet-only designs.	Select when board layout requires >64 pins and USB device-only operation suffices.
STM32F407VGT6	Cortex-M4 core @ 168 MHz, FPU, larger Flash (1 MB), but no native Ethernet MAC - requires external MAC+PHY or SPI Ethernet controller.	Higher compute throughput for DSP/audio, but adds latency and component count for Ethernet connectivity.	Select when floating-point math or advanced signal processing dominates over deterministic Ethernet/CAN coexistence.

Compared with STM32F107VCT6, the STM32F105RCT6V offers USB OTG FS with integrated PHY in compact LQFP64, while STM32F407VGT6 trades native Ethernet for higher CPU performance at cost of external connectivity components and increased power.

Availability

STM32F105RCT6V is available at Aetrix Electronics and suitable for industrial gateways, automotive diagnostic tools, smart grid nodes, and factory automation edge controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32F105RCT6V 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.

The STM32F105xx series belongs to ST's Connectivity Line, engineered specifically for embedded systems demanding integrated high-speed wired interfaces - especially dual-CAN, USB OTG, and 10/100 Ethernet - without external glue logic.

FAQ

Does STM32F105RCT6V support CAN FD?

No. The STM32F105RCT6V implements CAN 2.0B Active protocol only, with bit rates up to 1 Mbps. It lacks the ISO 11898-1:2015 CAN FD framing, data field expansion, and flexible bit rate switching required for CAN FD compliance. For CAN FD, consider STM32H7 or STM32G4 series devices.

What is the maximum Ethernet throughput achievable with this MCU?

Real-world throughput is limited to ~35 Mbps TCP/IP due to CPU bandwidth constraints at 72 MHz and single-cycle memory access. The 10/100 Ethernet MAC supports full 100 Mbps line rate, but software stack overhead (LwIP, FreeRTOS) and DMA buffer management reduce practical throughput. Use RMII interface with external PHY for optimal performance.

Is the USB OTG interface capable of acting as a USB host for mass storage devices?

Yes. The USB OTG FS controller supports host mode with integrated PHY and complies with USB 2.0 Full-Speed specification. It can enumerate and communicate with USB mass storage class (MSC) devices using appropriate host stack (e.g., ST USB Host Library), though external 5 V power delivery must be managed by system-level circuitry.

How does the 256 KB Flash allocation accommodate bootloader, application, and firmware updates?

The Flash is partitioned into user sectors allowing atomic firmware updates: typical layout reserves 32 KB for dual-bank bootloader (with CRC validation), 192 KB for active application, and 32 KB for update staging. ST's AN2606 and STM32CubeProgrammer support seamless in-field upgrades without external memory.

STM32F105RCT6V 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:

STM32F105RCT6V FAQ

1.How can I place an order for STM32F105RCT6V through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32F105RCT6V 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 STM32F105RCT6V reliable?

The price and inventory of STM32F105RCT6V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F105RCT6V is usually 5 days.

3.What payment methods are accepted for STM32F105RCT6V?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F105RCT6V transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32F105RCT6V?

STM32F105RCT6V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32F105RCT6V 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 STM32F105RCT6V?

For technical support, including STM32F105RCT6V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F105RCT6V requirements.

6.How does Aetrix verify that STM32F105RCT6V is sourced from the original manufacturer or authorized distributors?

All STM32F105RCT6V 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 STM32F105RCT6V meets industry standards.

7.What is the process for return or replacement of STM32F105RCT6V?

All STM32F105RCT6V units undergo pre-shipment inspection (PSI). If there is an issue with STM32F105RCT6V, 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 STM32F105RCT6V part is unused and in its original packaging.

Return procedure for STM32F105RCT6V:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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