STMicroelectronics STM32F105VCT6

Overview

STM32F105VCT6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP100 package, delivering 72 MHz operation, 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 coexistence.

For engineers reviewing the STM32F105VCT6 datasheet, STM32F105VCT6 pinout, STM32F105VCT6 application, or STM32F105VCT6 equivalent, key selection criteria include Ethernet+CAN+USB OTG integration, 100-pin LQFP thermal and routing feasibility, 2.0–3.6 V supply tolerance, and dual 12-bit ADCs with temperature sensor for embedded control monitoring.

Technical Context

The device implements a tightly coupled ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide-enabling deterministic interrupt latency down to 12 cycles. Its clock system integrates three PLLs (main, USB, and audio), supporting independent domain scaling for Ethernet MAC (PCLK2), USB OTG (48 MHz), and I2S audio paths.

Connectivity peripherals are hardware-optimized for concurrent operation: the Ethernet MAC uses dedicated 4 KB SRAM and DMA with MII/RMII pinout flexibility; both CAN controllers feature 512 bytes of dedicated SRAM and full 2.0B Active compliance; USB OTG supports HNP/SRP/ID negotiation without external transceiver.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F107VCT6, the STM32F105VCT6 adds USB OTG host capability at identical pinout and power profile; versus STM32F407VGT6, it trades raw compute for lower system-level cost and smaller footprint via integrated Ethernet MAC and USB PHY.

Availability

STM32F105VCT6 is available at Aetrix Electronics and suitable for industrial gateways, automated test equipment, building automation controllers, and portable medical data loggers requiring stable component supply across extended product lifecycles.

Supply support for STM32F105VCT6 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-a product line engineered specifically for embedded applications demanding concurrent high-speed wired protocols (Ethernet, USB, CAN) with deterministic real-time response.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32F105VCT6 operates at up to 72 MHz with a measured performance of 1.25 DMIPS/MHz (Dhrystone 2.1). This translates to ~90 DMIPS, validated under zero-wait-state Flash access conditions using the internal 8 MHz RC oscillator multiplied by the PLL. Performance remains consistent across the industrial temperature range (–40°C to +85°C) per datasheet Section 5.3.3.

Does this MCU support IEEE 1588 Precision Time Protocol (PTP)?

Yes-the integrated Ethernet MAC includes hardware timestamping logic compliant with IEEE 1588-2008. It captures transmit and receive packet timestamps with sub-microsecond resolution directly in the MAC layer, eliminating software-induced jitter. The feature is enabled via ETH_PTP registers and requires no external timing components, as confirmed in Section 2.3.20 of the datasheet.

How many CAN interfaces does the STM32F105VCT6 provide, and what is their compliance level?

The device integrates two fully independent CAN 2.0B Active controllers, each with 512 bytes of dedicated SRAM for message objects. Both controllers support standard and extended identifiers, programmable bit timing, and automatic retransmission-fully compliant with ISO 11898-1:2003. No external CAN transceiver is required beyond the physical layer driver (e.g., TJA1042).

Is the USB interface limited to device mode, or does it support host functionality?

The USB peripheral is a full-speed USB On-The-Go (OTG) controller with integrated PHY, supporting device, host, and dual-role operation. Host mode enables connection to USB mass storage, HID, or CDC devices without external transceivers. The 1.25 KB dedicated SRAM supports endpoint buffers for simultaneous control, bulk, and interrupt transfers in either role, as specified in Section 2.3.22.