STMicroelectronics STM32F105VCT7

Overview

STM32F105VCT7 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP100 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 coexistence.

For engineers reviewing the STM32F105VCT7 datasheet, STM32F105VCT7 pinout, STM32F105VCT7 application, or STM32F105VCT7 equivalent, key selection criteria include Ethernet+CAN+USB OTG integration, 72 MHz deterministic execution, 2×12-bit ADCs with 1 µs conversion, 2×DACs, and hardware-accelerated CRC for firmware integrity in field-deployed edge nodes.

Technical Context

The STM32F105VCT7 implements a tightly coupled ARM Cortex-M3 core with Harvard bus architecture, supporting single-cycle multiplication and hardware division at 72 MHz. Its memory subsystem includes 256 KB of embedded Flash with 2-cycle access at full speed and 64 KB of SRAM with bit-band aliasing for atomic peripheral register access.

Connectivity is orchestrated via dedicated hardware blocks: a 10/100 Ethernet MAC with 4 KB SRAM and MII/RMII PHY interface, two independent CAN 2.0B controllers each backed by 256-byte SRAM buffers, and a USB 2.0 full-speed OTG controller with integrated PHY, HNP/SRP/ID support, and 1.25 KB dedicated SRAM.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, with 80 I/O pins - 51 available in VCT7 variant - all 5 V-tolerant except ADC/DAC/RTC pins; supports JTAG/SWD debug and up to 16 external interrupt vectors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F107VCT6, the STM32F105VCT7 offers extended temperature qualification and higher Flash endurance - critical for field-replaceable infrastructure nodes. Against LPC1788FBD208, it delivers native dual-CAN+Ethernet+OTG integration, reducing PCB complexity and improving time-to-market for protocol gateway designs.

Availability

STM32F105VCT7 is available at Aetrix Electronics and suitable for industrial gateways, automotive diagnostic tools, energy management controllers, and building automation nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32F105VCT7 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 analog products for industrial, automotive, and consumer markets.

The STM32F105xx series belongs to ST's Connectivity Line - engineered specifically for embedded applications demanding concurrent high-speed wired interfaces (Ethernet, USB OTG, dual CAN) with real-time determinism and low-latency peripheral response.

FAQ

What is the maximum operating junction temperature for STM32F105VCT7?

The STM32F105VCT7 is qualified for operation up to +105°C junction temperature, with guaranteed functionality across the full industrial range of –40°C to +105°C. This rating is validated per AEC-Q100 stress test conditions and supports deployment in sealed enclosures near heat-generating components like power supplies or motor drivers.

Does STM32F105VCT7 support USB host mode without external components?

Yes - the integrated USB OTG FS controller includes a full-speed transceiver with on-chip PHY, supporting device, host, and OTG roles without external PHY chips. It implements HNP, SRP, and ID detection per USB OTG specification, enabling direct connection to USB flash drives or HID peripherals using only passive termination resistors.

How is Ethernet MAC timing managed for IEEE 1588 compliance?

The Ethernet MAC includes dedicated hardware timestamping logic that captures precise send/receive times at the MII/RMII interface level, independent of CPU load. Timestamp resolution is 1 ns with hardware addend adjustment, meeting IEEE 1588-2008 boundary clock requirements for sub-microsecond synchronization in industrial automation networks.

Can the two CAN controllers operate simultaneously with independent message filtering?

Yes - each CAN controller has its own 256-byte dedicated SRAM buffer and fully independent filter banks (14 x 32-bit filters per CAN). They operate autonomously with separate TX/RX mailboxes and interrupt vectors, enabling concurrent handling of CANopen and J1939 traffic without CPU arbitration or shared resource contention.