STM32F439IIT6 - 180MHz Cortex-M4 MCU | ST | Industrial
MPN: STM32F439IIT6 ✓ ActiveSTM32F439IIT6 Overview
A microcontroller is a programmable integrated circuit containing a processor core, memory, peripherals, and interface controllers on one semiconductor device. The STM32F4 series belongs to the hierarchy of 32-bit RISC microcontroller, Arm Cortex-M4 processor, embedded control IC, and semiconductor. The Cortex-M4 architecture combines deterministic instruction execution with efficient digital signal processing, making it suitable for connected industrial equipment, control panels, communications equipment, and human-machine interfaces.
The STM32F439IIT6 provides 2 MB of Flash memory, 225 DMIPS of processing performance, and an Arm Cortex-M4 core operating up to 180 MHz. Its integrated connectivity includes Ethernet, USB OTG, and an LCD-TFT controller. These functions reduce the need for discrete communication and display interface components while supporting firmware-intensive networking, graphics, data acquisition, and supervisory-control applications.
The device supports 3.3 V and 5 V supply arrangements identified for this part, while its Arm Cortex-M4 processor includes a single-precision FPU and a complete set of DSP instructions. The 176-pin LQFP package exposes substantially more I/O than smaller microcontroller packages, supporting simultaneous peripheral connections and external memory or display interfaces. Exact pin functions, memory-map details, and electrical limits should be assigned from the STMicroelectronics pin-description table in datasheet DM00077036.
Typical uses include industrial Ethernet gateways, USB-connected data loggers, programmable logic controllers, motor and process controllers, medical monitoring equipment, and TFT-based human-machine interfaces. The 180 MHz core and DSP capability support real-time control loops, protocol processing, and signal filtering, while the large Flash capacity accommodates networking stacks, graphical interfaces, and field-upgradeable application firmware.
The primary design consideration is PCB density around the 176-pin LQFP footprint. Place decoupling capacitors at each appropriate supply pin, route high-speed communications away from sensitive analog inputs, and use solid ground-plane continuity beneath the device. Confirm oscillator, reset, boot, and programming interfaces against the manufacturer datasheet before schematic release or PCB layout.
This page consolidates the manufacturer specifications, exact-source pricing eligibility, same-package replacement analysis, interface comparisons, and practical design guidance needed to evaluate the STM32F439IIT6 for a new embedded platform.
Drop-in alternatives for STM32F439IIT6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32F439IIT6 (same form factor and footprint) — differing in Package, SRAM, Flash Memory, Mounting Type, ADC.
STM32F429IIT6
✅ Drop-In✗ Out of Stock
$8.3523 / Unit
View Datasheet →STM32F437IIT6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32F479IIT6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32F446IIT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32F427IIT6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32F439IIT6 Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit RISC microcontroller |
| Processor Core | Arm Cortex-M4 |
| Maximum Clock Frequency | 180 MHz |
| Word Size | 32 bit |
| Embedded Flash Memory | 2 MB (2M x 8 bit) |
| Performance | 225 DMIPS |
| Floating-Point Unit | Single precision |
| DSP Support | Arm Cortex-M4 DSP instruction set |
| Supply Voltage | 3.3 V or 5 V |
| Ethernet Interface | Integrated Ethernet |
| USB Interface | USB OTG |
| Display Controller | Integrated LCD-TFT controller |
| Package Type | 176-pin LQFP |
| Package Dimensions | 24 mm x 24 mm |
| Mounting Type | Surface mount |
| RoHS Compliance | Compliant |
STM32F439IIT6 24 mm x 24 mm Pin Configuration Guide
Pin configuration for STM32F439IIT6 (24 mm x 24 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32F439IIT6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32F439IIT6 is suitable for 6 applications: Industrial Ethernet Gateway, USB Data Logger, TFT Human-Machine Interface, Programmable Logic Controller, Medical Monitoring Equipment, Motor and Process Controller.
Industrial Ethernet Gateway
The STM32F439IIT6 fits an industrial Ethernet gateway because its 180 MHz Arm Cortex-M4 core provides deterministic processing capacity for protocol handling, local data collection, and supervisory logic. The integrated Ethernet block reduces the component count of a connected controller while 2 MB of Flash supports a TCP/IP stack, management services, and application firmware. Deploy the MCU on a multilayer PCB with a controlled-impedance Ethernet route, isolated magnetics or PHY interface where required, and separate analog and digital return paths to preserve signal integrity.
Recommended
USB Data Logger
The STM32F439IIT6 is appropriate for a USB-connected data logger because USB OTG, 2 MB of Flash, and the 180 MHz Cortex-M4 core support buffering, file management, and high-rate sensor acquisition. Its DSP instructions can accelerate filtering and fixed-point processing, while the single-precision FPU supports control calculations without forcing software emulation. Keep USB routing away from analog inputs, use controlled-impedance routing for high-speed signals, and provide local decoupling at each regulator to prevent acquisition noise from appearing on the data bus.
Recommended
TFT Human-Machine Interface
The STM32F439IIT6 supports a TFT human-machine interface by combining its LCD-TFT controller with a 180 MHz Cortex-M4 processor and 2 MB of Flash. The processor can update graphical content while the integrated display interface handles panel transactions, and the DSP capability supports responsive touch and control-loop processing. Match the MCU voltage level to the panel interface, route display signals away from switching supplies, and validate timing through the manufacturer LCD-TFT controller configuration and memory requirements.
Recommended
Programmable Logic Controller
The STM32F439IIT6 is suitable for a programmable logic controller because its 180 MHz Cortex-M4 core, DSP instructions, extensive 176-pin I/O, and 2 MB Flash support deterministic machine control and configurable I/O expansion. Ethernet and USB OTG allow programming, diagnostics, and supervisory connectivity without multiple discrete interface controllers. Use short return paths for digital inputs, segregate relay and power-stage currents, and confirm all pin multiplexing and timing assignments against the STMicroelectronics reference manual and datasheet.
Recommended
Medical Monitoring Equipment
The STM32F439IIT6 can serve as the control processor in medical monitoring equipment when its 180 MHz performance, DSP support, and 2 MB of Flash are needed for sensor acquisition, filtering, and a local user interface. The FPU assists with control calculations, while Ethernet and USB OTG enable encrypted data transfer and configuration workflows. Patient-connected circuits require separate isolation, protection, and safety architecture; this MCU should remain separated from direct patient-contact circuitry unless the complete system has been appropriately designed and validated.
Recommended
Motor and Process Controller
The STM32F439IIT6 fits real-time motor and process control when the design benefits from its 180 MHz Cortex-M4 core, single-precision FPU, DSP instructions, and high I/O count. It can execute control loops while handling communications and supervisory tasks, and its 2 MB Flash provides room for parameter tables and application logic. Keep power-stage switching nodes separated from the MCU, use dedicated gate drivers and current sensing, and validate control timing and analog noise margins against the application’s operating conditions.
Recommended
Recommended Products Summary
Engineering reference data for STM32F439IIT6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F429IIT6 | STM32F437IIT6 | STM32F479IIT6 | STM32F446IIT6 | STM32F427IIT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 176-pin LQFP (24x24 mm) | 176-pin LQFP (24x24 mm) | 176-pin LQFP (24x24 mm) | 176-pin LQFP (24x24 mm) | 176-pin LQFP (24x24 mm) | 176-pin LQFP (24x24 mm) |
| Processor Core | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 |
| Maximum Clock Frequency | 180 MHz | 180 MHz | 180 MHz | 180 MHz | 180 MHz | 180 MHz |
| Embedded Flash Memory | 2 MB | 2 MB | 2 MB | 2 MB | 128 KB | 256 KB |
| Ethernet Interface | Integrated Ethernet | Not available | Not available | Integrated Ethernet | Not available | Not available |
| USB Interface | USB OTG | USB OTG | USB OTG | USB OTG | USB OTG | USB OTG |
| LCD-TFT Controller | Integrated LCD-TFT controller | Integrated LCD-TFT controller | Integrated LCD-TFT controller | Integrated LCD-TFT controller | Integrated LCD-TFT controller | Integrated LCD-TFT controller |
| FPU | Single precision | Single precision | Single precision | Single precision | Single precision | Single precision |
Key Differentiators
- Integrated Ethernet in the 176-pin LQFP STM32F4 configuration (vs STM32F429IIT6)
- Higher Flash capacity for network stacks and field firmware (vs STM32F446IIT6)
- Larger local memory than the STM32F427IIT6 alternative (vs STM32F427IIT6)
Design Notes
Treat the 176-pin LQFP as a high-density mixed-signal layout. Follow the STMicroelectronics pin-definition table and package drawing for every power, ground, alternate-function, and debug connection. Place the required bypass capacitors adjacent to their supply pins with short ground returns, keep switching-node copper away from analog inputs, and maintain a continuous ground reference beneath the device where the recommended layout permits it.
Route Ethernet, USB, and other high-speed interfaces as controlled-impedance nets with continuous reference planes, short vias, and avoidance of right-angle transitions. Place Ethernet isolation or PHY circuitry according to the selected network architecture, and keep clock lines away from Ethernet magnetics and switching regulators. Validate signal integrity with the actual layer stack-up, connector, PHY, and cable configuration rather than relying only on nominal interface timing.
Do not treat the STM32F429IIT6 or STM32F437IIT6 as fully transparent substitutes for the STM32F439IIT6 when Ethernet is used. The missing Ethernet block can affect pin assignments, firmware initialization, clock configuration, driver selection, and board testing. Perform a peripheral-by-peripheral design review, rebuild the project for the selected device, and run communication, timing, brownout, and peripheral regression tests before releasing the substitution.
Compliance Information
RoHS compliance is identified for STM32F439IIT6. Other environmental and material declarations are not established by the available manufacturer and distributor records. AEC-Q100 status is recorded as not applicable because the part is not identified as an automotive-qualified ordering code.