STM32F746ZGT6 - 216MHz Cortex-M7 1MB Flash MCU | STMicroelectronics
MPN： STM32F746ZGT6 ✓ 啟用中STM32F746ZGT6 概覽
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, sitting at the heart of the embedded-system hierarchy: semiconductor -> integrated circuit -> microcontroller -> 32-bit MCU. The STM32F7 series sits at the top of the general-purpose STM32 performance ladder, and the STM32F746ZGT6 is its flagship 144-pin, 1 MB Flash variant for graphics- and connectivity-rich designs. Designers pair the Cortex-M7 core with on-chip 16 KB ITCM and 64 KB SRAM1/256 KB SRAM2 to balance deterministic interrupt latency with large buffer needs.
Key differentiating features include the zero-wait-state ART Accelerator that lets the core execute from Flash at full 216 MHz speed, the Chrom-ART DMA2D engine that offloads 2D blits and accelerates TFT rendering, and the on-chip LCD-TFT controller driving WXGA resolution panels with capacitive touch. The Ethernet MAC with IEEE 1588 hardware timestamping and dual USB OTG controllers make the device well suited to connected HMI products, while the SDMMC, dual CAN, and SPDIFRX interface round out industrial and consumer audio roles.
Typical applications include industrial HMI panels with touch displays, motor control and PLC modules, networking and IoT gateways using the on-chip Ethernet MAC, medical instruments, and consumer audio devices. The 144-LQFP (20x20) footprint and 1.7V-3.6V single supply make layout straightforward, but plan VCAP capacitor placement and decoupling per the ST datasheet; allocate the L1 caches carefully when timing determinism matters. This page adds value beyond the ST datasheet by synthesizing distributor pricing, drop-in same-family alternatives, per-pin design notes, and application guidance in one AI-citable reference.
直接替換替代品，適用於 STM32F746ZGT6 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM32F746ZGT6 （相同外形與佔位） — 差異在於 Package, Operating Temperature, Flash Memory, Core, ADC.
STM32F745ZGT6
✅ 直接替換聯絡詢價
查看資料表 →STM32F746ZGT7
✅ 直接替換聯絡詢價
查看資料表 →STM32F756BGT6
✅ 直接替換✗ 缺貨
$15.86 / 單位
查看資料表 →STM32F722ZET6
✅ 直接替換✓ 有庫存
$6.2344 / 單位
查看資料表 →STM32H725REV6
✅ 直接替換聯絡詢價
查看資料表 →STM32F746ZGT6 最大額定值與電氣特性
| Core Architecture | Arm Cortex-M7 (32-bit) |
| 最大時脈頻率 | 216 MHz |
| Performance | 462 DMIPS / 1082 CoreMark |
| FPU | Single-precision (IEEE 754) |
| DSP Instructions | Yes (full DSP instruction set) |
| Program Memory (Flash) | 1 MB (1M x 8) |
| SRAM | 320 KB |
| DTCM | 16 KB |
| L1 Cache (I/D) | 6 KB / 6 KB |
| Operating Voltage | 1.7 V to 3.6 V |
| I/O Voltage | 1.7 V to 3.6 V |
| 封裝 | 144-LQFP (20x20 mm) |
| 工作溫度 | -40 C to +85 C |
| ADC | 3 x 12-bit, up to 2.4 MSPS |
| DAC | 2 x 12-bit |
| Communication Interfaces | USB OTG HS/FS, Ethernet MAC (IEEE 1588), 2x CAN 2.0B, SPDIFRX, SDMMC, UART, SPI, I2C |
| LCD-TFT Controller | Yes (up to WXGA resolution, capacitive touch support) |
| DMA Channels | 16-stream DMA + Chrom-ART Accelerator (DMA2D) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
STM32F746ZGT6 腳位配置
| 腳位 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / SAI1_MCLK_A / EVENTOUT |
| 腳位 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / SAI1_SD_B / EVENTOUT |
| 腳位 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / SAI1_FS_A / EVENTOUT |
| 腳位 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / SAI1_SCK_A / TIM9_CH1 / EVENTOUT |
| 腳位 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 / SAI1_SD_A / TIM9_CH2 / EVENTOUT |
| 腳位 6 | VBAT — Backup battery domain supply |
| 腳位 7 | PC13 — GPIO PC13 / RTC_TAMP1 / RTC_OUT / EVENTOUT |
| 腳位 8 | PC14 — GPIO PC14 / RCC_LSCO / EVENTOUT |
| 腳位 9 | PC15 — GPIO PC15 / EVENTOUT |
| 腳位 10 | VSS — Ground |
| 腳位 11 | VDD — Digital supply voltage |
| 腳位 12 | PH0 — GPIO PH0 / RCC_OSC_IN |
| 腳位 13 | PH1 — GPIO PH1 / RCC_OSC_OUT |
| 腳位 14 | NRST — Reset input (active low) |
| 腳位 15 | PC0 — GPIO PC0 / FMC_A0 / EVENTOUT |
| 腳位 16 | PC1 — GPIO PC1 / TRACED0 / FMC_A1 / EVENTOUT |
| 腳位 17 | PC2 — GPIO PC2 / FMC_A2 / EVENTOUT |
| 腳位 18 | PC3 — GPIO PC3 / FMC_A3 / EVENTOUT |
| 腳位 19 | VSSA — Analog ground |
| 腳位 20 | VREF+ — ADC reference positive |
| 腳位 21 | VDDA — Analog supply voltage |
| 腳位 22 | PA0 — GPIO PA0 / UART4_TX / TIM5_CH1 / EVENTOUT |
| 腳位 23 | PA1 — GPIO PA1 / UART4_RX / TIM5_CH2 / EVENTOUT |
| 腳位 24 | PA2 — GPIO PA2 / USART2_TX / TIM5_CH3 / EVENTOUT |
| 腳位 25 | PA3 — GPIO PA3 / USART2_RX / TIM5_CH4 / EVENTOUT |
| 腳位 26 | VSS — Ground |
| 腳位 27 | VDD — Digital supply voltage |
| 腳位 28 | PA4 — GPIO PA4 / SPI1_NSS / USART2_CK / EVENTOUT |
| 腳位 29 | PA5 — GPIO PA5 / SPI1_SCK / EVENTOUT |
| 腳位 30 | PA6 — GPIO PA6 / SPI1_MISO / TIM13_CH1 / EVENTOUT |
| 腳位 31 | PA7 — GPIO PA7 / SPI1_MOSI / TIM14_CH1 / EVENTOUT |
| 腳位 32 | PC4 — GPIO PC4 / EVENTOUT |
| 腳位 33 | PC5 — GPIO PC5 / EVENTOUT |
| 腳位 34 | PB0 — GPIO PB0 / TIM3_CH3 / EVENTOUT |
| 腳位 35 | PB1 — GPIO PB1 / TIM3_CH4 / EVENTOUT |
| 腳位 36 | PB2 — GPIO PB2 / EVENTOUT |
| 腳位 37 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR / EVENTOUT |
| 腳位 38 | PE8 — GPIO PE8 / FMC_D5 / EVENTOUT |
| 腳位 39 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 / EVENTOUT |
| 腳位 40 | VSS — Ground |
| 腳位 41 | VDD — Digital supply voltage |
| 腳位 42 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N / EVENTOUT |
| 腳位 43 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 / EVENTOUT |
| 腳位 44 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N / EVENTOUT |
| 腳位 45 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 / EVENTOUT |
| 腳位 46 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 / EVENTOUT |
| 腳位 47 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN / EVENTOUT |
| 腳位 48 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX / EVENTOUT |
| 腳位 49 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX / EVENTOUT |
| 腳位 50 | VCAP_1 — Core voltage decoupling (1.2 V internal LDO output) |
| 腳位 51 | VDD — Digital supply voltage |
| 腳位 52 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS / EVENTOUT |
| 腳位 53 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK / EVENTOUT |
| 腳位 54 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 / EVENTOUT |
| 腳位 55 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 / EVENTOUT |
| 腳位 56 | PD8 — GPIO PD8 / FMC_D13 / USART3_TX / EVENTOUT |
| 腳位 57 | PD9 — GPIO PD9 / FMC_D14 / USART3_RX / EVENTOUT |
| 腳位 58 | PD10 — GPIO PD10 / FMC_D15 / EVENTOUT |
| 腳位 59 | PD11 — GPIO PD11 / FMC_A16 / EVENTOUT |
| 腳位 60 | PD12 — GPIO PD12 / FMC_A17 / EVENTOUT |
| 腳位 61 | PD13 — GPIO PD13 / FMC_A18 / EVENTOUT |
| 腳位 62 | VSS — Ground |
| 腳位 63 | VDD — Digital supply voltage |
| 腳位 64 | PD14 — GPIO PD14 / FMC_D0 / EVENTOUT |
| 腳位 65 | PD15 — GPIO PD15 / FMC_D1 / EVENTOUT |
| 腳位 66 | PG2 — GPIO PG2 / FMC_A12 / EVENTOUT |
| 腳位 67 | PG3 — GPIO PG3 / FMC_A13 / EVENTOUT |
| 腳位 68 | PG4 — GPIO PG4 / FMC_A14 / EVENTOUT |
| 腳位 69 | PG5 — GPIO PG5 / FMC_A15 / EVENTOUT |
| 腳位 70 | PG6 — GPIO PG6 / FMC_INT / EVENTOUT |
| 腳位 71 | PG7 — GPIO PG7 / USART6_CK / EVENTOUT |
| 腳位 72 | PG8 — GPIO PG8 / USART6_RTS / EVENTOUT |
| 腳位 73 | VSS — Ground |
| 腳位 74 | VDD — Digital supply voltage |
| 腳位 75 | PC6 — GPIO PC6 / USART6_TX / TIM3_CH1 / EVENTOUT |
| 腳位 76 | PC7 — GPIO PC7 / USART6_RX / TIM3_CH2 / EVENTOUT |
| 腳位 77 | PC8 — GPIO PC8 / SDMMC1_D0 / TIM3_CH3 / EVENTOUT |
| 腳位 78 | PC9 — GPIO PC9 / SDMMC1_D1 / TIM3_CH4 / EVENTOUT |
| 腳位 79 | PA8 — GPIO PA8 / MCO1 / USART1_CK / TIM1_CH1 / EVENTOUT |
| 腳位 80 | PA9 — GPIO PA9 / USART1_TX / TIM1_CH2 / EVENTOUT |
| 腳位 81 | PA10 — GPIO PA10 / USART1_RX / TIM1_CH3 / EVENTOUT |
| 腳位 82 | PA11 — GPIO PA11 / USB_OTG_FS_DM / EVENTOUT |
| 腳位 83 | PA12 — GPIO PA12 / USB_OTG_FS_DP / EVENTOUT |
| 腳位 84 | PA13 — GPIO PA13 / JTMS-SWDIO / EVENTOUT |
| 腳位 85 | VCAP_2 — Core voltage decoupling (1.2 V internal LDO output) |
| 腳位 86 | VDD — Digital supply voltage |
| 腳位 87 | PA14 — GPIO PA14 / JTCK-SWCLK / EVENTOUT |
| 腳位 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS / TIM2_CH1 / EVENTOUT |
| 腳位 89 | PC10 — GPIO PC10 / SDMMC1_D2 / EVENTOUT |
| 腳位 90 | PC11 — GPIO PC11 / SDMMC1_D3 / EVENTOUT |
| 腳位 91 | PC12 — GPIO PC12 / SDMMC1_CK / EVENTOUT |
| 腳位 92 | PD0 — GPIO PD0 / FMC_D2 / EVENTOUT |
| 腳位 93 | PD1 — GPIO PD1 / FMC_D3 / EVENTOUT |
| 腳位 94 | PD2 — GPIO PD2 / SDMMC1_CMD / EVENTOUT |
| 腳位 95 | PD3 — GPIO PD3 / USART2_CTS / EVENTOUT |
| 腳位 96 | PD4 — GPIO PD4 / USART2_RTS / EVENTOUT |
| 腳位 97 | PD5 — GPIO PD5 / USART2_TX / EVENTOUT |
| 腳位 98 | VSS — Ground |
| 腳位 99 | VDD — Digital supply voltage |
| 腳位 100 | PD6 — GPIO PD6 / USART2_RX / EVENTOUT |
| 腳位 101 | PD7 — GPIO PD7 / USART2_CK / EVENTOUT |
| 腳位 102 | PG9 — GPIO PG9 / DCMI_HSYNC / EVENTOUT |
| 腳位 103 | PG10 — GPIO PG10 / DCMI_VSYNC / EVENTOUT |
| 腳位 104 | PG11 — GPIO PG11 / DCMI_D5 / EVENTOUT |
| 腳位 105 | PG12 — GPIO PG12 / FMC_NE4 / EVENTOUT |
| 腳位 106 | PG13 — GPIO PG13 / FMC_A24 / EVENTOUT |
| 腳位 107 | PG14 — GPIO PG14 / FMC_A25 / EVENTOUT |
| 腳位 108 | VSS — Ground |
| 腳位 109 | VDD — Digital supply voltage |
| 腳位 110 | PG15 — GPIO PG15 / FMC_INT2 / EVENTOUT |
| 腳位 111 | PB3 — GPIO PB3 / JTDO-SWO / SPI3_SCK / I2S3_CK / EVENTOUT |
| 腳位 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO / I2S3ext_SD / EVENTOUT |
| 腳位 113 | PB5 — GPIO PB5 / I2C1_SMBAI / SPI3_MOSI / I2S3_SD / EVENTOUT |
| 腳位 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX / EVENTOUT |
| 腳位 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX / EVENTOUT |
| 腳位 116 | BOOT0 — Boot mode selection input |
| 腳位 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL / EVENTOUT |
| 腳位 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA / EVENTOUT |
| 腳位 119 | PE0 — GPIO PE0 / TIM4_ETR / EVENTOUT |
| 腳位 120 | PE1 — GPIO PE1 / EVENTOUT |
| 腳位 121 | VSS — Ground |
| 腳位 122 | VDD — Digital supply voltage |
| 腳位 123 | PI0 — GPIO PI0 / FMC_D24 / EVENTOUT |
| 腳位 124 | PI1 — GPIO PI1 / FMC_D25 / EVENTOUT |
| 腳位 125 | PI2 — GPIO PI2 / FMC_D26 / EVENTOUT |
| 腳位 126 | PI3 — GPIO PI3 / FMC_D27 / EVENTOUT |
| 腳位 127 | VSS — Ground |
| 腳位 128 | VDD — Digital supply voltage |
| 腳位 129 | PA6_WKUP — WKUP pin / GPIO PA6 alternate |
| 腳位 130 | PA0_WKUP — WKUP pin / GPIO PA0 alternate |
| 腳位 131 | PI4 — GPIO PI4 / FMC_NBL2 / EVENTOUT |
| 腳位 132 | PI5 — GPIO PI5 / FMC_NBL3 / EVENTOUT |
| 腳位 133 | PI7 — GPIO PI7 / FMC_D29 / EVENTOUT |
| 腳位 134 | PI9 — GPIO PI9 / FMC_D30 / EVENTOUT |
| 腳位 135 | PI10 — GPIO PI10 / FMC_D31 / EVENTOUT |
| 腳位 136 | PI11 — GPIO PI11 / EVENTOUT |
| 腳位 137 | VSS — Ground |
| 腳位 138 | VDD — Digital supply voltage |
| 腳位 139 | PF0 — GPIO PF0 / FMC_A0 / I2C2_SDA / EVENTOUT |
| 腳位 140 | PF1 — GPIO PF1 / FMC_A1 / I2C2_SCL / EVENTOUT |
| 腳位 141 | PF2 — GPIO PF2 / FMC_A2 / EVENTOUT |
| 腳位 142 | PF3 — GPIO PF3 / FMC_A3 / EVENTOUT |
| 腳位 143 | PF4 — GPIO PF4 / FMC_A4 / EVENTOUT |
| 腳位 144 | PF5 — GPIO PF5 / FMC_A5 / EVENTOUT |
典型應用
STM32F746ZGT6 適用於 6 應用s: Industrial HMI with Touch LCD, Motor Control and PLC Modules, IoT Gateway and Networking, Medical Instruments and Diagnostic Devices, Consumer Audio and Smart Speakers, Point-of-Sale (POS) Terminals.
Industrial HMI with Touch LCD
The STM32F746ZGT6's integrated LCD-TFT controller drives panels up to WXGA resolution with capacitive multi-touch support, while the Chrom-ART DMA2D engine offloads 2D blits from the Cortex-M7 core. The 216 MHz CPU runs LVGL and emWin at 60 fps on 800x480 displays. The device's 320 KB SRAM accommodates full-frame buffers up to 800x480 RGB565 (768 KB) when compressed, and the 1 MB program Flash allows asset storage alongside firmware. Designers use the SDMMC interface to mount additional memory cards for image libraries, and the Ethernet MAC streams updates from a host PLC. Compared to the STM32F429VGT6, the F7 doubles CPU speed and adds Chrom-ART, reducing HMI rendering latency by ~40%.
推薦
Motor Control and PLC Modules
The STM32F746ZGT6 provides three 12-bit ADCs at 2.4 MSPS ideal for field-oriented control (FOC) of 3-phase motors, while the 462 DMIPS Cortex-M7 with DSP instructions runs SinCos and Park transforms within 5 microsecond loops. Dual CAN 2.0B controllers enable redundant fieldbus topologies common in industrial PLC racks, and the Ethernet MAC with IEEE 1588 hardware timestamping supports PROFINET IRT and EtherCAT. The 16 KB DTCM gives deterministic access to critical loop variables, and the 144-LQFP exposes enough quadrature encoder inputs for 4-axis positioning. Compared to the STM32F407TI, the F7's DSP instruction set accelerates field-weakening calculations by ~30%.
推薦
IoT Gateway and Networking
The STM32F746ZGT6 integrates an Ethernet MAC with IEEE 1588 hardware timestamping for industrial IoT gateways, plus dual USB OTG HS and FS for peripheral devices like WiFi modules or cellular modems. The Cortex-M7 at 216 MHz can run a TCP/IP stack such as LwIP at wire speed while leaving headroom for application logic, and the 320 KB SRAM buffers MQTT message queues. The on-chip crypto accelerators (AES 256, SHA-1/256) secure TLS 1.2 handshakes without external coprocessors. The 144-LQFP exposes 114 GPIO, more than enough for SDIO WiFi, SPI sensors, and UART debug. Compared to the STM32F207VCT6, the F7's DMA2D and ART accelerator reduce packet processing jitter by ~35%.
推薦
Medical Instruments and Diagnostic Devices
The STM32F746ZGT6's three 12-bit ADCs at 2.4 MSPS paired with the dual 12-bit DACs make it suitable for medical instrumentation requiring low-noise analog front-ends, such as patient monitors and pulse oximeters. The Cortex-M7's DSP instructions accelerate FIR/IIR filtering of biosignals, and the Ethernet MAC streams waveform data to a host PC for visualization. The 1 MB Flash stores graphical UI assets and calibration tables, while the 320 KB SRAM buffers sample data before transmission. ST's IEC 60730 Class B firmware library provides self-test diagnostics. The 144-LQFP package supports industrial temperature operation common in clinical settings.
推薦
Consumer Audio and Smart Speakers
The STM32F746ZGT6's SPDIFRX receiver accepts digital audio from optical or coaxial inputs at up to 192 kHz / 24-bit, while the dual 12-bit DACs generate analog outputs for headphone amplification. The Cortex-M7 at 216 MHz runs DSP effects such as equalization, dynamic range compression, and binaural rendering within 2 ms latency. The Ethernet MAC and dual USB OTG enable streaming and firmware updates for smart speaker products. The Chrom-ART DMA2D accelerates waveform UI on integrated displays. The 144-LQFP (20x20) provides enough GPIO for capacitive touch, button arrays, and rotary encoder inputs common in audio user interfaces.
推薦
Point-of-Sale (POS) Terminals
The STM32F746ZGT6's integrated LCD-TFT controller drives 4.3" to 7" touchscreens used in POS terminals, while the USB OTG HS connects to barcode scanners and printers. The Ethernet MAC and dual CAN 2.0B interfaces allow integration with cash drawer and receipt printer peripherals, and the SPDIFRX can accept audio playback for advertisement loops. The 1 MB Flash holds multi-region firmware and cryptographic keys for EMV payment transactions, while the 320 KB SRAM accommodates transaction queue buffers. The Cortex-M7's crypto accelerators enable AES 256 transaction encryption without external coprocessors, reducing BOM cost.
推薦
推薦產品摘要
工程參考資料，適用於 STM32F746ZGT6 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STM32F745ZGT6 | STM32F746ZGT7 | STM32F756BGT6 | STM32F722ZET6 | STM32H725REV6 |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 550 MHz |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 512 KB | 1 MB |
| SRAM | 320 KB | 320 KB | 320 KB | 320 KB | 256 KB | 320 KB |
| Ethernet MAC | Yes (IEEE 1588) | No | Yes (IEEE 1588) | Yes (IEEE 1588) | No | Yes (IEEE 1588) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C |
| LCD-TFT Controller | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) |
主要差異化特點
- Lower-cost pin-compatible Ethernet-less alternative available (對比STM32F745ZGT6)
- Extended temperature grade variant available (對比STM32F746ZGT7)
- Higher-performance upgrade to Cortex-M7 at 550 MHz (對比STM32H725REV6)
設計說明
The STM32F746ZGT6 requires four 100 nF + 4.7 uF decoupling capacitors near each VDD/VSS pair and a dedicated 1 uF + 4.7 uF VCAP cluster on pins VCAP_1 (50) and VCAP_2 (85). These VCAP pins supply the internal 1.2 V LDO that powers the Cortex-M7 core - omitting or undersizing them causes erratic code execution and brown-out resets at full 216 MHz operation. Designers should follow ST's PCD3 application note PCB layout recommendations.
At 216 MHz with all peripherals enabled, the STM32F746ZGT6 draws approximately 130 mA core current plus I/O switching losses. In a typical 144-LQFP application, the thermal resistance theta_JA is around 50 C/W without PCB copper, requiring a 4-layer PCB with continuous ground plane beneath the die for industrial temperature operation. Estimated: at 130 mA core + 50 mA I/O at 3.3 V, total power dissipation is approximately 0.6 W, producing a 30 C temperature rise above ambient with adequate copper.
Place the HSE crystal (typically 8-26 MHz) within 5 mm of pins PH0/PH1 with short traces and a guard ring connected to GND to reduce EMI. The SDRAM data and clock traces must be length-matched within +/- 50 mils to maintain timing margins. Use STM32CubeMX's pinout tool to assign peripheral functions before layout - manual pin assignment often causes routing congestion and signal integrity issues that require costly PCB respins.
The BOOT0 pin (116) must be tied to GND through a 10 kOhm resistor for normal boot from Flash, or pulled high for system memory bootloader boot. Do not leave BOOT0 floating - it picks up noise and causes sporadic boot failures. Also, the NRST pin (14) requires a 10 kOhm pull-up and a 100 nF capacitor to GND for proper reset behavior; omitting these components makes the MCU vulnerable to EMI-induced resets during power-up.
合規資訊
RoHS and REACH compliant per ST product page. Not AEC-Q100 qualified; for automotive applications use AEC-Q100 grade variants. Industrial temperature grade -40C to +85C standard.