Item specifics
Description
The STM32F107RCT6 is a Connectivity Line Cortex-M3 MCU from STMicroelectronics in an LQFP-64 package (10×10×1.4 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 IEEE 1588 PTP upgraded version of the STM32F105RCT6, providing complete Ethernet precision clock synchronization functionality within a 64-pin package. 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). 51 I/Os (LQFP-64 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 STM32F105RCT6 (256 KB Flash/64 KB SRAM). The Ethernet MAC additionally supports the IEEE 1588 PTP Precision Time Protocol, making it suitable for industrial Ethernet applications requiring network clock synchronization. Compared to the STM32F107VCT6 (LQFP-100, 80 I/Os), core specifications are identical, with this model using an LQFP-64 package providing 51 I/Os, ideal for space-constrained designs requiring Ethernet synchronization.
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: 51, all 5 V-tolerant Package: LQFP-64 (10×10×1.4 mm), Tray
Industrial Automation: PLCs, inverters, industrial Ethernet gateways, dual CAN communication nodes 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 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 51 I/Os: LQFP-64 package, all 5 V-tolerant Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL
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FAQ:
What is the STM32F107RCT6 and how does it differ from the STM32F107VCT6?
The STM32F107RCT6 is a 72 MHz Arm Cortex‑M3 microcontroller with 256 KB Flash and 64 KB SRAM, packed in a compact LQFP‑64 package. It belongs to the STM32F105/F107 "connectivity line" and includes a 10/100 Ethernet MAC, a USB OTG controller with integrated PHY, and two CAN 2.0B interfaces. The only difference from the VCT6 is the package: the RCT6 uses an LQFP‑64 with up to 51 I/Os, while the VCT6 uses an LQFP‑100 with up to 82 I/Os. Core features, memory, and peripherals are identical. Choose the RCT6 when board space is tight and you can work within 51 I/Os, while still needing the full F107 connectivity suite.
How does the STM32F107RCT6 compare to the classic STM32F103RCT6? What are the key upgrades?
Both share the same 72 MHz Cortex‑M3 core, 256 KB Flash, 64 KB SRAM, and LQFP‑64 package. However, the F107RCT6 adds significant connectivity peripherals: a 10/100 Ethernet MAC (requiring an external PHY), a USB OTG controller with integrated PHY, and a second CAN 2.0B interface. The F103RCT6 lacks Ethernet, has only USB device (no OTG), and a single CAN. If your design needs any of these advanced communication interfaces, the F107RCT6 is the natural upgrade without changing the core or memory footprint.
Can the STM32F107RCT6 really support Ethernet on a 64‑pin package? What external components are needed?
Yes, using the RMII interface for Ethernet (which requires fewer pins than MII), you can allocate Ethernet, USB OTG, dual CAN, and a few UART/SPI/I2C interfaces on the 64‑pin package without pin conflicts. An external Ethernet PHY (e.g., LAN8720 or DP83848) is required to connect to the physical network. The MAC includes dedicated DMA for efficient data transfer, and LwIP runs well on the Cortex‑M3 core. STM32CubeMX helps verify the exact pin‑multiplexing for your design.
Is 256 KB Flash and 64 KB SRAM enough for a TCP/IP stack, USB, and dual 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 with compiler optimizations. 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 STM32F207RCT6 (256 KB Flash, 128 KB SRAM, 120 MHz) provides a migration path with additional headroom.
Does the STM32F107RCT6 have an FSMC? Can I add external SRAM or parallel memory?
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 STM32F107RCT6 compare to the STM32F207RCT6? When should I pick the F107?
The STM32F207RCT6 is a 120 MHz Cortex‑M3 with 128 KB SRAM—double the CPU speed and SRAM of the F107. The F107RCT6 is the more cost‑sensitive choice when 72 MHz and 64 KB SRAM are sufficient. Choose the F107 when your code size and processing requirements are modest, you need Ethernet and USB OTG in a small 64‑pin footprint, and you want to stay in the proven F1 ecosystem. The F207 is better when you need higher throughput, more SRAM, or external memory via FSMC.
What low‑power modes does the STM32F107RCT6 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 the STM32F107RCT6 run 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.
How can I perform over‑the‑air (OTA) firmware updates with the 256 KB single‑bank Flash?
The 256 KB Flash can be logically partitioned into a bootloader and an active application. A typical bootloader reserves 16 KB, leaving 240 KB for the application. The 64 KB SRAM can temporarily buffer the new firmware image received via Ethernet, USB, or an external wireless module. A CRC or signature check ensures a safe update without hardware dual‑bank Flash. An A/B scheme is possible if the application is compact enough.
What are the most typical applications for the STM32F107RCT6?
It is widely used in compact Ethernet‑to‑serial gateways, CAN‑to‑Ethernet bridges, networked industrial sensors, building automation controllers, USB‑connected instruments, and any space‑constrained embedded system that needs a reliable Cortex‑M3 core with built‑in Ethernet, USB OTG, and dual CAN in a small LQFP‑64 footprint. Its mature F1 ecosystem and low pin count make it a popular choice for cost‑sensitive connected devices.