Item specifics
Description
The STM32F107VCT6 is a Connectivity Line Cortex-M3 MCU from STMicroelectronics in an LQFP-100 package (14×14 mm). It features a 72 MHz Cortex-M3 core at 1.25 DMIPS/MHz with single-cycle multiplication and hardware division, 256 KB Flash, and 64 KB SRAM. This model is the representative 100-pin variant of the STM32F107 family, adding Ethernet IEEE 1588 PTP hardware support over the STM32F105 series with rich I/O resources. The MCU integrates USB 2.0 OTG FS (on-chip PHY), Ethernet 10/100 MAC (4 KB dedicated SRAM, IEEE 1588 PTP hardware support, MII/RMII), dual CAN 2.0B (512 bytes dedicated SRAM), dual 12-bit ADCs (16 channels, 1 µs), dual 12-bit DACs, 12-channel DMA, up to 10 timers (including 1 motor control PWM with deadtime/emergency stop), and up to 14 communication interfaces (5×USART/3×SPI/2×I2C/2×I2S/USB OTG/CAN/Ethernet). 80 I/Os (LQFP-100 package), all 5 V-tolerant. Supply 2.0–3.6 V, -40–85 °C, ECOPACK®2. Comparison with similar models: Core specifications are identical to the STM32F105VCT6 (256 KB Flash/64 KB SRAM). The Ethernet MAC additionally supports IEEE 1588 PTP Precision Time Protocol, making it suitable for industrial Ethernet applications requiring sub-microsecond network clock synchronization. Compared to the STM32F107RCT6 (LQFP-64, 51 I/Os), core specifications are identical, with the package upgraded to LQFP-100 and I/Os increased from 51 to 80. Compared to the STM32F103VET6 (512 KB Flash/64 KB SRAM), it has half the Flash but adds USB OTG, Ethernet MAC, and dual CAN interfaces.
Core: Arm Cortex-M3 72 MHz, 1.25 DMIPS/MHz, single-cycle multiplication/hardware division, SWD & JTAG debug Memory: 256 KB Flash, 64 KB SRAM, CRC, 96-bit unique ID USB 2.0 OTG FS: Device/host/OTG, on-chip PHY, HNP/SRP/ID support Ethernet MAC: 10/100 Mbit/s, 4 KB dedicated SRAM, IEEE 1588 PTP hardware support, MII/RMII Dual CAN 2.0B: 512 bytes dedicated SRAM, 11 filters per CAN Dual 12-bit ADCs: 16 channels, 1 µs, 0–3.6 V, sample and hold, temperature sensor, up to 2 MSPS in interleaved mode Dual 12-bit DACs: Buffered output DMA: 12 channels, supporting timers, ADCs, DAC, I2Ss, SPIs, I2Cs, USARTs Up to 10 Timers: 1× motor control PWM (deadtime/emergency stop), up to 4× 16-bit GP (quadrature encoder), 2× basic (DAC drive), 2× watchdogs, SysTick Up to 14 Communication Interfaces: 2×I2C (SMBus/PMBus), 5×USART (ISO7816/LIN/IrDA), 3×SPI (18 Mbit/s), 2×I2S, USB OTG FS, 2×CAN 2.0B, Ethernet MAC Low Power: Sleep/Stop/Standby, VBAT backup RTC and backup registers Clock: 3–25 MHz XTAL, 32 kHz RTC XTAL, 8 MHz RC, 40 kHz RC, PLL I/Os: 80, all 5 V-tolerant Package: LQFP-100 (14×14×1.4 mm), Tray
Industrial Automation: PLCs, inverters, industrial Ethernet gateways, dual CAN communication nodes, inverters Precision Clock Sync: IEEE 1588 PTP network time synchronization, smart grid/substation automation Motor Control: Fans, pumps, small motors (motor control PWM/deadtime/emergency stop) Medical: Handheld medical terminals, health monitoring devices Consumer: Remote controls, handhelds, PC peripherals, GPS platforms Home Appliances: Panels, HVAC, alarms, video intercoms, home audio Security: Access control, alarms, smoke detectors IoT: Wireless sensors, environmental monitoring, smart home Automotive: Light control, window anti-pinch, sensor nodes (non-safety-critical) Printers & Scanners
Connectivity Line Flagship Configuration: USB OTG + dual CAN + Ethernet MAC IEEE 1588 PTP quadruple interface — rare in this class IEEE 1588 PTP Precision Clock Sync: Hardware timestamp support for industrial Ethernet and smart grid applications requiring sub-microsecond clock synchronization — the key differentiator from the STM32F105 series 256 KB Flash + 64 KB SRAM: For complex communication stacks and algorithms LQFP-100 Package: 14×14 mm, 80 I/Os, rich I/O resources USB OTG FS: On-chip PHY, device/host/OTG support without external PHY Ethernet MAC: 10/100 Mbit/s, 4 KB dedicated SRAM, IEEE 1588 PTP hardware support, MII/RMII Dual CAN 2.0B: 512 bytes dedicated SRAM for dual industrial bus communication 72 MHz Cortex-M3: 1.25 DMIPS/MHz, single-cycle multiplication/hardware division Dual 12-bit ADCs: 1 µs, 16 channels, temperature sensor, up to 2 MSPS in interleaved mode Dual 12-bit DACs: Buffered output for audio/sensor excitation/control loops 12-ch DMA: Direct peripheral-to-memory transfers, offloads CPU 14 Communication Interfaces: 5×USART + 3×SPI + 2×I2C + 2×I2S + USB OTG + 2×CAN + Ethernet 80 I/Os: LQFP-100 package, all 5 V-tolerant Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL
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FAQ:
What is the STM32F107VCT6 and how does it differ from the STM32F103VCT6?
The STM32F107VCT6 is a 72 MHz Arm Cortex‑M3 microcontroller with 256 KB Flash and 64 KB SRAM, housed in an LQFP‑100 package. It belongs to the STM32F105/F107 "connectivity line." The key difference from the popular STM32F103VCT6 is the addition of a 10/100 Ethernet MAC, a USB OTG controller with integrated PHY, and a second CAN 2.0B interface. The F107 retains the same core speed and memory as the F103, making it a drop‑in upgrade for applications that need network connectivity or more serial communication channels without moving to a higher‑performance series.
How does the STM32F107VCT6 compare to the STM32F207VCT6? When should I pick the F107?
The STM32F207VCT6 is a 120 MHz Cortex‑M3 with 256 KB Flash and 128 KB SRAM—double the CPU speed and SRAM of the F107. The F107VCT6 is the more cost‑sensitive choice when 72 MHz and 64 KB SRAM are sufficient for your application. Choose the F107 when your code size and processing requirements are modest, you need Ethernet and USB OTG, and you want to stay in the proven F1 ecosystem with its extensive code base and toolchain support. The F207 is better when you need higher throughput, more SRAM for communication buffers, or faster CPU response.
Can the STM32F107VCT6 run Ethernet, USB OTG, and dual CAN simultaneously on a 100‑pin package?
Yes, with careful pin planning. The chip includes a 10/100 Ethernet MAC (RMII), a USB OTG FS controller with integrated PHY, and two CAN 2.0B ports. Using RMII for Ethernet (which uses fewer pins than MII), you can allocate Ethernet, USB, dual CAN, and several UART/SPI/I2C interfaces without conflicts. STM32CubeMX helps you verify the exact pin‑multiplexing. This makes the F107VCT6 a powerful, compact communication hub for industrial gateways and networked controllers even in its space‑saving LQFP‑100 body.
Is 256 KB Flash and 64 KB SRAM enough for a TCP/IP stack, USB, and CAN application?
Absolutely. A lightweight RTOS, an LwIP TCP/IP stack, a USB device stack, and a CANopen protocol can be tightly packed into 256 KB of Flash, especially when compiler optimizations are enabled. The 64 KB SRAM is sufficient for communication buffers and real‑time data in many proven industrial designs. If your code later outgrows these limits, the STM32F207VCT6 (256 KB Flash, 128 KB SRAM, 120 MHz) provides a migration path with additional headroom.
Does the STM32F107VCT6 have an external memory controller? Can I add external SRAM?
No, the STM32F107 does not include an FSMC (Flexible Static Memory Controller). External parallel memory cannot be added. For applications that need additional data buffering, you can use the SPI ports to connect serial SRAM or PSRAM. If your design absolutely requires external parallel memory, the STM32F207 series (which includes an FSMC) is a more suitable choice.
How does the Ethernet MAC on the STM32F107VCT6 work? What external components are required?
The chip integrates a 10/100 Ethernet MAC that supports both MII and RMII interfaces. You must add an external Ethernet PHY (e.g., LAN8720 or DP83848) to connect to the physical network. The RMII mode is preferred on the 100‑pin package because it uses fewer I/O pins. The MAC includes dedicated DMA for efficient data transfer, and the LwIP stack runs well on the Cortex‑M3 core, enabling standard TCP/IP communication for web servers, Modbus/TCP, and MQTT applications.
What low‑power modes does the STM32F107VCT6 support, and is it suitable for battery‑powered devices?
It supports Sleep, Stop, and Standby modes. In Stop mode with all 64 KB SRAM retained, the typical current is around 110 µA. The chip can wake up on Ethernet, USB, or CAN activity. While it is not as power‑efficient as newer STM32L series MCUs, it is suitable for battery‑powered industrial sensors and portable instruments that need periodic network communication and spend most of their time in low‑power sleep.
Can I use the STM32F107VCT6 for USB high‑speed, or is it limited to full‑speed?
The STM32F107 provides a full‑speed USB OTG controller with an integrated PHY (12 Mbps). It does not include a high‑speed ULPI interface. For applications like virtual COM ports, HID devices, or moderate‑speed data loggers, full‑speed is usually sufficient. If you need 480 Mbps USB, the STM32F207 or F407 series with a ULPI PHY is required.
What are the most typical applications for the STM32F107VCT6?
It is widely used in Ethernet‑to‑serial gateways, CAN‑to‑Ethernet bridges, networked industrial sensors, building automation controllers, USB‑connected instruments, and any embedded system that needs a reliable Cortex‑M3 core with built‑in Ethernet, USB OTG, and dual CAN. Its 100‑pin package and mature F1 ecosystem make it a popular choice for cost‑sensitive connected devices.
Is the STM32F107VCT6 still a good choice for new designs, or should I move to a newer series?
The F107 remains a solid choice for applications that do not require the higher speed, larger SRAM, or advanced features of the F2/F4/F7 series. It is widely available, well‑supported by STM32CubeIDE and the HAL library, and has a vast community knowledge base. For simple networked devices where 72 MHz and 64 KB SRAM are sufficient, the F107 offers a proven, cost‑effective solution. If you anticipate code growth or need more processing power, the pin‑compatible STM32F207VCT6 is a natural upgrade path.