STMicroelectronics STM32F107VBT6

Overview

STM32F107VBT6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in the Connectivity line, featuring 256 KB Flash, 64 KB SRAM, dual CAN 2.0B interfaces, USB OTG FS controller with on-chip PHY, and 10/100 Ethernet MAC with IEEE 1588 support. It operates at up to 72 MHz, integrates two 12-bit ADCs (16-channel, 1 µs conversion), two 12-bit DACs, and supports industrial networking applications requiring real-time protocol stacks and hardware-accelerated communication.

For engineers reviewing the STM32F107VBT6 datasheet, STM32F107VBT6 pinout, STM32F107VBT6 application, or STM32F107VBT6 equivalent, key selection criteria include Ethernet MAC timing compliance (MII/RMII), dual-CAN bus arbitration latency, USB OTG host/device role switching capability, and 512-byte CAN SRAM allocation per interface.

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 response under real-time Ethernet and CAN traffic loads. Its memory subsystem includes 256 KB of embedded Flash with error correction and 64 KB of SRAM with parity protection, supporting concurrent DMA transfers across multiple peripherals without CPU contention.

Communication subsystems are hardware-optimized: the Ethernet MAC includes dedicated 4 KB SRAM and IEEE 1588 timestamping logic; dual CAN controllers each have independent 512-byte message RAM and full 2.0B Active compliance; USB OTG FS integrates HNP/SRP/ID detection and 1.25 KB dedicated SRAM for descriptor management.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch) with 80 I/O pins - all 5 V-tolerant except analog inputs and USB pins; supports remappable alternate functions for flexible PCB routing in industrial control layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6, STM32F107VBT6 provides lower-latency Ethernet/CAN integration and smaller footprint for protocol gateway use; compared with STM32H743VIT6, it offers proven qualification for extended temperature industrial operation with simpler toolchain and certification path.

Availability

STM32F107VBT6 is available at Aetrix Electronics and suitable for industrial Ethernet gateways, automotive diagnostic tools, networked PLC I/O modules, and smart energy meter communication hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32F107VBT6 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 broad industrial qualification coverage.

The STM32F107xx Connectivity line was designed specifically for embedded networking applications requiring integrated Ethernet MAC, dual CAN, and USB OTG - targeting industrial gateways, building automation controllers, and protocol converters where hardware offload reduces software stack complexity.

FAQ

What is the maximum operating temperature range for STM32F107VBT6?

The STM32F107VBT6 is qualified for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 5.3.1 of the datasheet (DocID15274 Rev 10), with thermal derating applied above 70 °C for sustained Ethernet MAC operation. The LQFP100 package's θ_JA is 39.5 °C/W, requiring minimum 2-layer PCB copper area for thermal compliance.

Does STM32F107VBT6 support RMII or MII physical layer interface?

Yes - the Ethernet MAC supports both MII and RMII modes via dedicated pin configurations (Section 2.3.20). RMII uses 10 pins (including REF_CLK) and reduces PCB routing complexity; MII uses 16 pins and supports higher clock stability for long-distance PHY connections. Pin mapping is fixed per package: PD0–PD7, PA1–PA2, PC1–PC4, and PC5 for MII; PB12–PB13, PC1–PC4, and PA1 for RMII.

How much SRAM is allocated to the USB OTG peripheral?

The USB OTG FS controller has 1.25 KB (1280 bytes) of dedicated SRAM for endpoint descriptors, FIFO buffers, and setup packet storage. This allocation is fixed and non-reconfigurable, as specified in Section 2.3.22 and Table 2 of the datasheet. It supports up to 4 bidirectional endpoints with configurable FIFO depth.

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

Yes - each CAN interface (CAN1 and CAN2) has its own 512-byte message RAM and fully independent filter banks (Section 2.3.21). Up to 28 filter banks can be configured across both controllers, allowing concurrent reception of distinct CAN IDs on separate buses without software arbitration or shared resource contention.