STM32F427IIT6 - ARM Cortex-M4 MCU 180MHz 2MB Flash LQFP-176 | STMicroelectronics
MPN: STM32F427IIT6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.25 | $162.50 |
| 100 | $14.1 | $1,410.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $11.2 | $11,200.00 |
STM32F427IIT6 Overview
An ARM Cortex-M4 microcontroller is a 32-bit RISC processor core that combines microcontroller-level interrupt determinism with DSP extensions and (in the F4 class) a single-precision floating-point unit. The Cortex-M4 belongs to the ARMv7-M architecture profile and sits within the hierarchy microcontroller -> 32-bit MCU -> RISC processor -> semiconductor. It is engineered for real-time embedded control where deterministic latency and signal-processing throughput both matter.
Key features of the STM32F427IIT6 include the Adaptive Real-Time (ART) Accelerator eliminating Flash wait states, a full DSP instruction set plus single-precision FPU, a Chrom-ART graphics accelerator for TFT displays, USB 2.0 OTG full-speed and high-speed with on-chip PHY, an integrated 10/100 Ethernet MAC with IEEE 1588v2 hardware time-stamping, three 12-bit ADCs reaching 2.4 MSPS, two 12-bit DACs, and up to 17 timers including motor-control timers. The device supports up to 256 KB SRAM with 4 KB backup SRAM and a wide range of communication peripherals: CAN 2.0B, UART/USART, SPI, I2C, SAI, and SDMMC.
Architecturally the STM32F427 leverages the Cortex-M4 Harvard bus structure with separate ICode/DCode buses for Flash access, a dedicated DMA matrix for memory traffic offload, and multi-layer AHB/APB bus matrix peripherals with independent clocking. The ART Accelerator prefetch buffer coupled with the 5x pipeline lets the core sustain 180 MHz instruction fetch from Flash without stalls, which is critical for control loops in motor drives and audio DSP.
Typical applications include industrial motor control (FOC for three-phase PMSM/BLDC drives), human-machine interface panels with TFT LCD, Ethernet-connected PLC modules with deterministic real-time communication, audio codecs and effects processors leveraging DSP instructions, medical instrumentation, and high-end consumer audio/video equipment. The wide peripheral set lets one chip replace several dedicated ICs in the BOM.
When designing with this device, allocate a 4-layer PCB with continuous ground pour and decoupling of 100 nF plus 4.7 uF ceramic per VDD pin pair to keep the high-speed digital switching noise isolated from sensitive analog rails. The 176-pin LQFP (24 x 24 mm) requires 0.5 mm pitch routing; signal integrity on the Ethernet and USB high-speed lines demands controlled impedance (90 ohm differential).
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and design notes that complement - but do not replace - the manufacturer datasheet and reference manual RM0090.
Drop-in alternatives for STM32F427IIT6 — 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 STM32F427IIT6 (same form factor and footprint) — differing in Package, Communication Interfaces, Timers, SRAM, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32F427IIT7
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F429IIT6
✅ Drop-In✓ In Stock
$8.3523 / Unit
View Datasheet →STM32F439IIT6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F427IIH6
✅ Drop-In✓ In Stock
$8.1 / Unit
View Datasheet →STM32F427ZIT6
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.1 / Unit
View Datasheet →STM32F427IIT6 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4 with FPU and DSP instructions |
| Maximum CPU Frequency | 180 MHz |
| DMIPS Performance | 225 DMIPS (1.25 DMIPS/MHz, Dhrystone 2.1) |
| Flash Memory | 2 MB |
| SRAM | 256 KB (plus 4 KB backup SRAM) |
| Operating Voltage | 1.8 V to 3.6 V |
| Package | 176-pin LQFP (24 x 24 mm, 0.5 mm pitch) |
| Operating Temperature Range | -40C to +85C (industrial grade) |
| ADC | 3 x 12-bit, 2.4 MSPS |
| DAC | 2 x 12-bit |
| USB | USB 2.0 OTG FS + USB 2.0 OTG HS (with on-chip PHY) |
| Ethernet | 10/100 MAC with IEEE 1588v2 hardware time-stamping |
| Timers | Up to 17 (including motor-control timers) |
| Communication Peripherals | UART/USART, SPI, I2C, CAN 2.0B, SAI, SDMMC |
| Graphics Accelerator | Chrom-ART (for TFT LCD) |
| ART Accelerator | Yes (0-wait-state Flash execution) |
| Mounting Type | Surface Mount (LQFP-176) |
| RoHS Status | Compliant |
STM32F427IIT6 176-pin lqfp (24 x 24 mm, 0.5 mm pitch) Pin Configuration Guide
Pin configuration for STM32F427IIT6 (176-pin lqfp (24 x 24 mm, 0.5 mm pitch) 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 STM32F427IIT6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32F427IIT6 is suitable for 7 applications: Industrial Motor Control (FOC Drives), TFT LCD HMI Panels, Ethernet-Connected PLC Modules, Professional Audio Equipment, Medical Instrumentation, Drone Flight Controllers, Solar Inverters / Power Conversion.
Industrial Motor Control (FOC Drives)
The STM32F427IIT6 is a strong fit for three-phase PMSM and BLDC field-oriented control drives, where its three 12-bit 2.4 MSPS ADCs enable simultaneous phase-current sampling at 20-50 kHz PWM rates. The advanced timer block provides complementary PWM with programmable dead-time and hardware break inputs, while the Cortex-M4 FPU and DSP instructions execute the Park/Clarke transforms and PI loops within a few microseconds per PWM cycle. In a typical 1 kW servo drive the FOC loop closes in under 5 us with the FPU active, leaving ample headroom for state machines, encoder decoding via the hardware quadrature interface, and EtherCAT communication stacks. STMicroelectronics' Motor Control Workbench SDK generates the entire FOC firmware on top of this part, shortening time to market.
Recommended
TFT LCD HMI Panels
Although the STM32F427 lacks the integrated LTDC found on the F429, the STM32F427IIT6 still drives mid-size TFT panels efficiently via its 8-bit/16-bit 8080/6800 parallel interface plus the Chrom-ART DMA2D engine that offloads rectangle-fill and image-blit operations from the CPU. Designers pair the MCU with an external SPI/DSI bridge or a small FPGA/ASIC TCON for SVGA panels, while the F427 manages GUI logic, touch acquisition, and communication. With 2 MB Flash and 256 KB SRAM the F427 stores full-frame buffers plus the embedded GUI library in Flash and uses 256 KB SRAM as a small active buffer; Chrom-ART accelerates pixel copying at line-rate, keeping the CPU free for application logic.
Recommended
Ethernet-Connected PLC Modules
Industrial PLC modules benefit from the STM32F427IIT6's integrated 10/100 Ethernet MAC with IEEE 1588v2 hardware time-stamping, which supports EtherCAT, PROFINET IRT and TSN with sub-microsecond synchronization accuracy. The 256 KB SRAM is sufficient for LwIP plus a single TCP connection, while 2 MB Flash stores the protocol stack, web server and application firmware in one image. The Cortex-M4 DSP instructions handle the deterministic packet scheduling and field-bus frame handling in real time, and the on-chip crypto on the F439 sibling adds TLS/DTLS acceleration for secure remote firmware updates.
Recommended
Professional Audio Equipment
The STM32F427IIT6's SAI (Serial Audio Interface) supports I2S, TDM and LJ/RJ protocols up to 192 kHz/24-bit, and the Cortex-M4 DSP instructions accelerate reverb, EQ, dynamics and FIR filtering for effect processors. With 2 MB Flash the part stores multiple preset banks plus an audio firmware update image, while 256 KB SRAM buffers full-bandwidth audio with zero CPU overhead via DMA. The integrated USB 2.0 OTG full-speed plus high-speed with on-chip PHY supports a USB Audio Class 2.0 device port at 24-bit/96 kHz without an external ULPI PHY, keeping BOM small.
Recommended
Medical Instrumentation
Patient-monitoring and diagnostic instruments use the STM32F427IIT6 for its 32-bit precision, real-time DSP capability and IEC 60601-compatible EMC. The three 12-bit ADCs digitize ECG, SpO2 and respiration signals simultaneously at up to 2.4 MSPS each, while the Cortex-M4 DSP filters 50/60 Hz mains interference in real time. The large 2 MB Flash stores waveform reference tables and patient-record firmware; the 256 KB SRAM buffers several seconds of waveform data for trend display. ST's STemWin embedded GUI library, paired with a small TFT, gives designers a complete medical UI without third-party middleware.
Recommended
Drone Flight Controllers
Quadcopter and fixed-wing flight controllers run stabilization loops at 1 kHz or higher; the STM32F427IIT6's 180 MHz Cortex-M4 with FPU executes quaternion-based attitude and PID control with sub-millisecond latency. The advanced timers generate DSHOT/OneShot PWM or standard PWM outputs for up to 8 motor ESCs, while the three 12-bit ADCs sample IMU gyro/accelerometer and magnetometer data in parallel. 256 KB SRAM buffers short-term flight logs and sensor fusion state, while 2 MB Flash stores the firmware plus configuration profiles. The USB 2.0 high-speed port supports field upgrades and live telemetry streaming.
Recommended
Solar Inverters / Power Conversion
String inverters and micro-inverters use the STM32F427IIT6 for MPPT control loops, grid synchronization and power-quality DSP. The Cortex-M4 DSP executes MPPT (Perturb & Observe or Incremental Conductance) at 10-50 kHz, while the 12-bit ADC samples PV string voltage/current at 2.4 MSPS for accurate maximum power-point tracking. The advanced timers drive the full-bridge at 50-100 kHz with phase-shifted PWM for totem-pole topologies. The 2 MB Flash holds the grid-protection firmware (anti-islanding, fault ride-through) per IEC 62116, and the Ethernet MAC connects the inverter to a plant-wide SCADA network.
Recommended
Recommended Products Summary
Engineering reference data for STM32F427IIT6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F427IIT7 | STM32F429IIT6 | STM32F439IIT6 | STM32F427IIH6 |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | LQFP-176 (24x24) | LQFP-176 (24x24) - same | LQFP-176 (24x24) - same | LQFP-176 (24x24) - same | LQFP-176 (24x24) - same |
| Core | Cortex-M4 180 MHz | Cortex-M4 180 MHz | Cortex-M4 180 MHz | Cortex-M4 180 MHz | Cortex-M4 180 MHz |
| Flash | 2 MB | 2 MB | 2 MB | 2 MB | 2 MB |
| SRAM | 256 KB + 4 KB backup | 256 KB + 4 KB backup | 256 KB + 4 KB backup | 256 KB + 4 KB backup | 256 KB + 4 KB backup |
| Operating Temperature | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C (AEC-Q100 grade 2) |
| TFT LCD Controller | No (Chrom-ART only) | No | Yes (built-in LTDC up to XGA) | Yes (built-in LTDC up to XGA) | No |
| Cryptographic Accelerator | No | No | No | Yes (AES-256, SHA-1/2, TRNG) | No |
| Automotive Qualification | No | No | No | No | Yes (AEC-Q100) |
| Price (1pc, USD) | 18.50 | 21.40 | 20.20 | 24.10 | 26.30 |
Key Differentiators
- Highest-density Flash in the STM32F4 family at the LQFP-176 tier (vs STM32F427IIT7)
- Built-in LCD-TFT controller for direct panel drive (vs STM32F427IIT6 (this part))
- Hardware AES/SHA/TRNG crypto engine (vs STM32F439IIT6)
Design Notes
The STM32F427IIT6 has multiple supply rails: VDD/VDDA for digital and analog core, VBAT for RTC and backup SRAM, and VDDUSB for the USB PHY. Each VDD pin pair must be decoupled with a 100 nF X7R ceramic placed within 2 mm of the pin, plus a shared 4.7 uF bulk on each rail. VBAT draws only a few microamps but must be present for RTC retention across VDD loss.
Route the 0.5 mm pitch LQFP-176 footprint with 0.20 mm trace/space rules on a 4-layer PCB; escape inner pads to inner layers via 0.25 mm microvias. Provide a continuous ground pour on layer 2 directly under the package, and place decoupling on the opposite (bottom) side to minimize loop area for the high-frequency switching currents. Keep analog VDD/VSS islands isolated from digital noise.
Estimated: At the maximum CPU activity at 180 MHz with all peripherals enabled, the LQFP-176 package has theta_JA around 30 C/W on a 4-layer JEDEC test board. At +85C ambient the junction temperature will rise to ~91C, well below the 125C limit. However continuous operation with the Ethernet PHY active and high-speed USB powered may add 0.5-1 W; verify with a thermal probe in the prototype phase.
Do not enable the HSE crystal oscillator before configuring the GPIOs for crystal mode - the oscillator will not start. Always program the flash wait-state latency (WS) in FLASH_ACR before switching the system clock above 30 MHz, otherwise fetch stalls corrupt Flash content. When using Ethernet, the PHY must be reset after the RCC clock is enabled or the link will not come up.
Compliance Information
RoHS and REACH compliant per STMicroelectronics product documentation. Not AEC-Q100 qualified; for automotive use the H6 suffix variant STM32F427IIH6 is the AEC-Q100 qualified version with the same die and footprint.
