STM32F405RGT6 vs STM32F407RGT6: ARM Cortex-M4 MCU Comparison

ElecSuppliers Part Number ComparisonAug 17, 2026

STM32F405RGT6 and STM32F407RGT6 are high-performance 32-bit microcontrollers from STMicroelectronics' STM32F4 family. Both use an Arm Cortex-M4 core running at up to 168 MHz and provide a large selection of timers, ADCs, communication interfaces, USB, CAN, SPI, I2C, and other peripherals.

Because the two MCUs share many specifications, STM32F405RGT6 vs STM32F407RGT6 is a common comparison when selecting an MCU for industrial control, robotics, motor control, communication equipment, and embedded systems.

What Is STM32F405RGT6?

STM32F405RGT6 is a Cortex-M4 microcontroller with up to 1 MB Flash and 192 KB SRAM. It operates at up to 168 MHz and includes DSP instructions and a single-precision floating-point unit.

The MCU provides multiple ADCs, DACs, timers, SPI, I2C, USART, CAN, USB, and other interfaces. The STM32F405RGT6 is available in a 64-pin LQFP package and is suitable for general-purpose high-performance embedded applications.

Common applications include motor controllers, industrial equipment, measurement systems, robotics, and embedded control products.

What Is STM32F407RGT6?

STM32F407RGT6 is another high-performance Cortex-M4 MCU in the STM32F4 family. It also operates at up to 168 MHz and offers up to 1 MB Flash and 192 KB SRAM.

The main advantage of the STM32F407 family is its additional connectivity functionality, including an integrated Ethernet MAC and camera interface. This makes STM32F407RGT6 particularly useful for networked embedded systems and applications involving image or camera data.

STM32F405RGT6 vs STM32F407RGT6

The basic CPU performance of the two devices is very similar. Both use the Cortex-M4 architecture and can operate at 168 MHz.

The major difference is the peripheral set.

STM32F405RGT6 is primarily a high-performance general-purpose MCU.

STM32F407RGT6 adds connectivity-oriented features such as Ethernet and a camera interface.

If a project does not require these additional functions, STM32F405RGT6 may provide everything needed. If Ethernet or camera connectivity is required, STM32F407RGT6 is the more suitable choice.

Memory and Performance

Both devices provide up to 1 MB of Flash and 192 KB of SRAM in the relevant configurations.

The 168 MHz Cortex-M4 core provides sufficient processing performance for applications involving real-time control, DSP calculations, sensor processing, communication protocols, and motor-control algorithms.

Therefore, CPU speed and memory are not usually the deciding factors when choosing between these two models.

The peripheral requirements are generally more important.

STM32F405RGT6 vs STM32F407RGT6 Ethernet

Ethernet is one of the clearest differences between the two families.

STM32F407 includes an integrated 10/100 Ethernet MAC with DMA support and MII/RMII interfaces.

This makes STM32F407RGT6 suitable for:

Industrial Ethernet

Networked controllers

Embedded gateways

Remote monitoring

IoT equipment

Networked automation systems

STM32F405RGT6 does not provide the same integrated Ethernet MAC, so an external Ethernet controller would be required for applications needing Ethernet connectivity.

STM32F405RGT6 vs STM32F407RGT6 Camera Interface

STM32F407 also provides a camera interface that can be useful for systems receiving image data from compatible camera sensors.

Potential applications include robotics, machine vision, industrial inspection, and embedded imaging.

STM32F405RGT6 is better suited to applications where camera input is not required.

Pinout and Package

Both STM32F405RGT6 and STM32F407RGT6 use a 64-pin LQFP package in these ordering codes.

The similar package makes the two devices attractive when evaluating a possible migration. However, engineers should not assume that the devices are automatically pin-to-pin replacements.

Peripheral availability and alternate-function assignments should be checked carefully before changing the MCU on an existing PCB.

STM32F405RGT6 vs STM32F407RGT6 Replacement

STM32F407RGT6 can potentially replace STM32F405RGT6 in some designs because the two families share the same Cortex-M4 architecture and many peripherals.

However, the complete hardware and firmware should be reviewed before making the change.

Important points include:

Pin assignment

Alternate functions

Timers

ADC channels

Communication interfaces

Clock configuration

Startup code

Flash configuration

Firmware libraries

If a design uses Ethernet or the camera interface, moving from STM32F407 to STM32F405 may require a hardware redesign.

Which One Should You Choose?

Choose STM32F405RGT6 when you need a powerful Cortex-M4 MCU for general embedded control, motor control, industrial equipment, sensors, and communication applications without requiring integrated Ethernet or camera functionality.

Choose STM32F407RGT6 when Ethernet networking, camera input, or other connectivity-oriented functions are important to the application.

For many general-purpose applications, the two MCUs offer very similar processing performance. The decision should therefore focus on the required peripherals rather than simply comparing CPU frequency.

Final Comparison

STM32F405RGT6 and STM32F407RGT6 are closely related STM32F4 microcontrollers with similar Cortex-M4 performance, memory capacity, and many common peripherals.

The most important difference is that STM32F407RGT6 provides additional connectivity features such as Ethernet and a camera interface.

For engineers searching for STM32F405RGT6 replacement, STM32F407RGT6 alternative, or STM32F405RGT6 vs STM32F407RGT6, checking the peripheral requirements, pinout, package, and firmware compatibility is essential before selecting a replacement.