Item specifics
Description
The STM32F427IIH6 is a Cortex-M4 high-performance MCU from STMicroelectronics in a UFBGA-176 package. It runs at 180 MHz with FPU and ART Accelerator. It integrates 2 MB Flash, 256 KB SRAM, Ethernet 10/100 MAC (IEEE 1588 PTP, MII/RMII), USB 2.0 OTG (FS/HS, FS on-chip PHY), camera interface (DCMI), hardware crypto/HASH/true random number processor, dual CAN 2.0B, two 12-bit DACs, three 12-bit ADCs (24ch, up to 7.2 MSPS in triple-interleaved mode), up to 17 timers (incl. 2 advanced motor control PWM/deadtime). 140 I/Os, all 5 V-tolerant. Supply 1.8–3.6 V, -40–85 °C. Compared to the STM32F407IGH6 (168 MHz, 1 MB Flash), this model increases the core frequency to 180 MHz, doubles Flash to 2 MB, increases SRAM to 256 KB, adds a second CAN interface and a true random number generator, providing comprehensive enhancements in performance and security. Compared to the STM32F401RET6 (84 MHz Cortex-M4), it delivers an overall performance upgrade and adds advanced features including Ethernet, DCMI, crypto engine, and dual CAN.
Core: Arm Cortex-M4 180 MHz + FPU + ART Accelerator Memory: 2 MB Flash, 256 KB SRAM (incl. 64 KB CCM) Ethernet MAC: 10/100 Mbit/s, IEEE 1588 PTP hardware support, MII/RMII USB 2.0 OTG: FS + HS, FS on-chip PHY, HS requires external ULPI SDIO + HW Crypto: SD/MMC interface; AES 128/192/256, 3DES, HASH (MD5, SHA-1), True RNG Dual CAN 2.0B: Supports dual industrial bus communication Camera Interface: 8–14-bit parallel DCMI 3×12-bit ADCs: 24 channels, 2.4 MSPS (up to 7.2 MSPS in triple-interleaved mode) 2×12-bit DACs: Buffered output Timers: Up to 17 (2× motor control PWM/deadtime/emergency stop, 12× 16-bit GP/quadrature encoder, 2× basic, 2× watchdogs, SysTick) Communication Interfaces: 4×USART + 2×UART (ISO7816/LIN/IrDA), 3×SPI (30 Mbit/s), 2×I2S, 3×I2C (SMBus), USB OTG, SDIO, Ethernet I/Os: 140, all 5 V-tolerant Low Power: Sleep/Stop/Standby, VBAT backup RTC Package: UFBGA-176 (10×10×0.6 mm)
Industrial: PLCs, inverters, precision motor drives, industrial Ethernet gateways Motor Control: Dual-motor FOC, servo drives, pumps Image Capture: Simple camera monitoring, barcode scanning, industrial vision Network Communication: Ethernet control nodes, IoT gateways Security Applications: IoT security, payment terminals, data integrity verification Portable Medical Devices Complex Embedded Systems: Applications requiring numerous I/Os, multi-peripheral connectivity, and Ethernet
180 MHz Cortex-M4 + FPU: Increased core frequency for complex DSP and floating-point operations 2 MB Flash + 256 KB SRAM: Large memory capacity for large firmware and complex algorithms Ethernet + DCMI + Crypto + Dual CAN: Network communication, image capture, data security, and dual industrial bus in a BGA package Hardware Crypto Engine + RNG: AES/3DES/HASH/true random number for data security and integrity Dual DACs + 3 ADCs: Comprehensive analog functions with multi-channel synchronous acquisition 17 Timers (incl. 2 Motor Control): Supports dual-motor FOC Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL
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FAQ:
What is the STM32F427IIH6 and what makes it unique in the F427 family?
The STM32F427IIH6 is the high‑density BGA member of the STM32F427 Cortex‑M4 series. It combines a 180 MHz CPU, 2 MB Flash, 256 KB SRAM, and a full suite of industrial communication peripherals into a tiny 10 × 10 mm UFBGA‑176 package. While the LQFP‑176 IIT6 offers the same I/O count (140), the IIH6’s BGA footprint takes up a fraction of the PCB area, making it the best choice when board space is at an absolute premium but you still need the largest code storage and the most I/O in the F427 line.
How does the STM32F427IIH6 differ from the STM32F429? When should I pick it?
The STM32F427IIH6 lacks the TFT‑LCD controller, Chrom‑ART accelerator, and DCMI camera interface found on the F429. This makes it a headless‑optimised MCU. Choose it over an F429 when your design does not need a graphical display or camera, but still requires the maximum 2 MB of Flash, 256 KB of SRAM, and a large number of I/Os in the smallest possible footprint.
What are the practical benefits of the UFBGA‑176 package compared to LQFP‑176 or LQFP‑208?
The UFBGA‑176 package measures only 10 × 10 mm—less than a fifth of the area of an LQFP‑176. It still provides 140 usable I/Os, allowing a 32‑bit SDRAM, Ethernet (RMII/MII), USB high‑speed (ULPI), dual CAN, and many serial ports without pin conflicts. The trade‑off is that it requires reflow soldering and cannot be hand‑soldered with a standard iron, but its compact size and shorter internal signal paths also improve EMI performance.
Is 2 MB of Flash and 256 KB of SRAM enough for a headless industrial gateway or motor drive?
Absolutely. The 2 MB Flash easily accommodates a real‑time OS, a TCP/IP stack, a CANopen or Modbus library, a file system, and a complex application—often with room to spare for over‑the‑air update partitions. The 256 KB SRAM includes 112 KB of general‑purpose RAM, 64 KB of core‑coupled memory (CCM) for zero‑wait‑state critical data, 64 KB of system SRAM, and 16 KB of instruction TCM. For demanding data‑buffer needs, the flexible memory controller can drive an external 32‑bit SDRAM.
Can the STM32F427IIH6 upgrade an existing STM32F407 design? What do I gain?
Yes, it is a strong upgrade path. The F407 is often used in LQFP packages, but if your design can move to a BGA for miniaturisation, the F427IIH6 brings a faster 180 MHz clock (vs 168 MHz), double the Flash (2 MB vs 1 MB), larger SRAM (256 KB vs 192 KB), and more serial interfaces, while keeping the same Cortex‑M4 ecosystem and HAL library compatibility. The BGA footprint can also drastically shrink the final product size.
Does the STM32F427IIH6 have any graphics or camera features?
No. Like the rest of the F427 series, it has no TFT‑LCD controller, no Chrom‑ART accelerator, and no DCMI. It is a pure “headless” controller, built for high‑performance industrial control, communication, and real‑time processing. If a rich graphical HMI is required, an STM32F429 BGA variant should be considered instead.
Can I use Ethernet, USB high‑speed, and dual CAN simultaneously on the STM32F427IIH6 without pin conflicts?
Yes. The UFBGA‑176 package provides up to 140 I/Os, enough to configure a full 32‑bit SDRAM, Ethernet (RMII or MII), USB HS with ULPI, two CAN 2.0B ports, and a number of UART/SPI/I2C interfaces at the same time. With careful pin planning in STM32CubeMX, you can avoid conflicts and still have several GPIOs available.
What development tools support the STM32F427IIH6, and is there a suitable evaluation board?
All mainstream IDEs—free STM32CubeIDE, Keil MDK, and IAR EWARM—fully support the chip. No dedicated Nucleo or Discovery board uses the exact UFBGA‑176 F427IIH6, but you can start firmware development on a NUCLEO‑F429ZI (LQFP‑144), which is software‑compatible. When the hardware is ready, simply adjust the linker script and pin assignments in CubeMX to target the IIH6.
Is it possible to hand‑solder or prototype with a UFBGA‑176 package?
Hand‑soldering with a standard iron is not practical for a 0.5 mm pitch BGA. For prototyping, most developers first build and test all firmware on an LQFP‑based Discovery or Nucleo board, then design the final PCB with the BGA. Small‑batch production is typically done with a reflow oven or hot‑air station, and X‑ray inspection is recommended to verify solder joints.
What are the most common applications for the STM32F427IIH6?
It is used in space‑constrained, high‑performance embedded systems that do not need a display: compact industrial IoT gateways, avionics controllers, miniature motor drives, high‑density data loggers, and secure communication nodes. The combination of 2 MB Flash, 256 KB SRAM, 140 I/Os, and an ultra‑small BGA package makes it possible to embed an M4 powerhouse into very small, professional products.