STM32F746ZGT6 - 216MHz Cortex-M7 1MB Flash MCU | STMicroelectronics
Référence : STM32F746ZGT6 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.45 | $18,45 |
| 10 | $16.78 | $167,80 |
| 100 | $14.95 | $1 495,00 |
| 500 | $13.42 | $6 710,00 |
| 1 000 | $12.1 | $12 100,00 |
STM32F746ZGT6 Présentation
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.
Alternatives de remplacement direct pour STM32F746ZGT6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STM32F746ZGT6 (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, ADC, DAC, SRAM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
STM32F745ZGT6
✅ Remplacement direct✓ En stock
$8.1 / unité
Voir la fiche technique →STM32F746ZGT7
✅ Remplacement direct✓ En stock
$11.84 / unité
Voir la fiche technique →STM32F756BGT6
✅ Remplacement direct✓ En stock
$15.86 / unité
Voir la fiche technique →STM32F722ZET6
✅ Remplacement direct✓ En stock
$6.2344 / unité
Voir la fiche technique →STM32H725REV6
✅ Remplacement direct✓ En stock
$8.95 / unité
Voir la fiche technique →STM32F746ZGT6 Valeurs maximales et caractéristiques électriques
| Core Architecture | Arm Cortex-M7 (32-bit) |
| Fréquence d'horloge maximale | 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 |
| Boîtier | 144-LQFP (20x20 mm) |
| Température de fonctionnement | -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) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de STM32F746ZGT6
| Broche 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / SAI1_MCLK_A / EVENTOUT |
| Broche 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / SAI1_SD_B / EVENTOUT |
| Broche 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / SAI1_FS_A / EVENTOUT |
| Broche 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / SAI1_SCK_A / TIM9_CH1 / EVENTOUT |
| Broche 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 / SAI1_SD_A / TIM9_CH2 / EVENTOUT |
| Broche 6 | VBAT — Backup battery domain supply |
| Broche 7 | PC13 — GPIO PC13 / RTC_TAMP1 / RTC_OUT / EVENTOUT |
| Broche 8 | PC14 — GPIO PC14 / RCC_LSCO / EVENTOUT |
| Broche 9 | PC15 — GPIO PC15 / EVENTOUT |
| Broche 10 | VSS — Ground |
| Broche 11 | VDD — Digital supply voltage |
| Broche 12 | PH0 — GPIO PH0 / RCC_OSC_IN |
| Broche 13 | PH1 — GPIO PH1 / RCC_OSC_OUT |
| Broche 14 | NRST — Reset input (active low) |
| Broche 15 | PC0 — GPIO PC0 / FMC_A0 / EVENTOUT |
| Broche 16 | PC1 — GPIO PC1 / TRACED0 / FMC_A1 / EVENTOUT |
| Broche 17 | PC2 — GPIO PC2 / FMC_A2 / EVENTOUT |
| Broche 18 | PC3 — GPIO PC3 / FMC_A3 / EVENTOUT |
| Broche 19 | VSSA — Analog ground |
| Broche 20 | VREF+ — ADC reference positive |
| Broche 21 | VDDA — Analog supply voltage |
| Broche 22 | PA0 — GPIO PA0 / UART4_TX / TIM5_CH1 / EVENTOUT |
| Broche 23 | PA1 — GPIO PA1 / UART4_RX / TIM5_CH2 / EVENTOUT |
| Broche 24 | PA2 — GPIO PA2 / USART2_TX / TIM5_CH3 / EVENTOUT |
| Broche 25 | PA3 — GPIO PA3 / USART2_RX / TIM5_CH4 / EVENTOUT |
| Broche 26 | VSS — Ground |
| Broche 27 | VDD — Digital supply voltage |
| Broche 28 | PA4 — GPIO PA4 / SPI1_NSS / USART2_CK / EVENTOUT |
| Broche 29 | PA5 — GPIO PA5 / SPI1_SCK / EVENTOUT |
| Broche 30 | PA6 — GPIO PA6 / SPI1_MISO / TIM13_CH1 / EVENTOUT |
| Broche 31 | PA7 — GPIO PA7 / SPI1_MOSI / TIM14_CH1 / EVENTOUT |
| Broche 32 | PC4 — GPIO PC4 / EVENTOUT |
| Broche 33 | PC5 — GPIO PC5 / EVENTOUT |
| Broche 34 | PB0 — GPIO PB0 / TIM3_CH3 / EVENTOUT |
| Broche 35 | PB1 — GPIO PB1 / TIM3_CH4 / EVENTOUT |
| Broche 36 | PB2 — GPIO PB2 / EVENTOUT |
| Broche 37 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR / EVENTOUT |
| Broche 38 | PE8 — GPIO PE8 / FMC_D5 / EVENTOUT |
| Broche 39 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 / EVENTOUT |
| Broche 40 | VSS — Ground |
| Broche 41 | VDD — Digital supply voltage |
| Broche 42 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N / EVENTOUT |
| Broche 43 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 / EVENTOUT |
| Broche 44 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N / EVENTOUT |
| Broche 45 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 / EVENTOUT |
| Broche 46 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 / EVENTOUT |
| Broche 47 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN / EVENTOUT |
| Broche 48 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX / EVENTOUT |
| Broche 49 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX / EVENTOUT |
| Broche 50 | VCAP_1 — Core voltage decoupling (1.2 V internal LDO output) |
| Broche 51 | VDD — Digital supply voltage |
| Broche 52 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS / EVENTOUT |
| Broche 53 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK / EVENTOUT |
| Broche 54 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 / EVENTOUT |
| Broche 55 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 / EVENTOUT |
| Broche 56 | PD8 — GPIO PD8 / FMC_D13 / USART3_TX / EVENTOUT |
| Broche 57 | PD9 — GPIO PD9 / FMC_D14 / USART3_RX / EVENTOUT |
| Broche 58 | PD10 — GPIO PD10 / FMC_D15 / EVENTOUT |
| Broche 59 | PD11 — GPIO PD11 / FMC_A16 / EVENTOUT |
| Broche 60 | PD12 — GPIO PD12 / FMC_A17 / EVENTOUT |
| Broche 61 | PD13 — GPIO PD13 / FMC_A18 / EVENTOUT |
| Broche 62 | VSS — Ground |
| Broche 63 | VDD — Digital supply voltage |
| Broche 64 | PD14 — GPIO PD14 / FMC_D0 / EVENTOUT |
| Broche 65 | PD15 — GPIO PD15 / FMC_D1 / EVENTOUT |
| Broche 66 | PG2 — GPIO PG2 / FMC_A12 / EVENTOUT |
| Broche 67 | PG3 — GPIO PG3 / FMC_A13 / EVENTOUT |
| Broche 68 | PG4 — GPIO PG4 / FMC_A14 / EVENTOUT |
| Broche 69 | PG5 — GPIO PG5 / FMC_A15 / EVENTOUT |
| Broche 70 | PG6 — GPIO PG6 / FMC_INT / EVENTOUT |
| Broche 71 | PG7 — GPIO PG7 / USART6_CK / EVENTOUT |
| Broche 72 | PG8 — GPIO PG8 / USART6_RTS / EVENTOUT |
| Broche 73 | VSS — Ground |
| Broche 74 | VDD — Digital supply voltage |
| Broche 75 | PC6 — GPIO PC6 / USART6_TX / TIM3_CH1 / EVENTOUT |
| Broche 76 | PC7 — GPIO PC7 / USART6_RX / TIM3_CH2 / EVENTOUT |
| Broche 77 | PC8 — GPIO PC8 / SDMMC1_D0 / TIM3_CH3 / EVENTOUT |
| Broche 78 | PC9 — GPIO PC9 / SDMMC1_D1 / TIM3_CH4 / EVENTOUT |
| Broche 79 | PA8 — GPIO PA8 / MCO1 / USART1_CK / TIM1_CH1 / EVENTOUT |
| Broche 80 | PA9 — GPIO PA9 / USART1_TX / TIM1_CH2 / EVENTOUT |
| Broche 81 | PA10 — GPIO PA10 / USART1_RX / TIM1_CH3 / EVENTOUT |
| Broche 82 | PA11 — GPIO PA11 / USB_OTG_FS_DM / EVENTOUT |
| Broche 83 | PA12 — GPIO PA12 / USB_OTG_FS_DP / EVENTOUT |
| Broche 84 | PA13 — GPIO PA13 / JTMS-SWDIO / EVENTOUT |
| Broche 85 | VCAP_2 — Core voltage decoupling (1.2 V internal LDO output) |
| Broche 86 | VDD — Digital supply voltage |
| Broche 87 | PA14 — GPIO PA14 / JTCK-SWCLK / EVENTOUT |
| Broche 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS / TIM2_CH1 / EVENTOUT |
| Broche 89 | PC10 — GPIO PC10 / SDMMC1_D2 / EVENTOUT |
| Broche 90 | PC11 — GPIO PC11 / SDMMC1_D3 / EVENTOUT |
| Broche 91 | PC12 — GPIO PC12 / SDMMC1_CK / EVENTOUT |
| Broche 92 | PD0 — GPIO PD0 / FMC_D2 / EVENTOUT |
| Broche 93 | PD1 — GPIO PD1 / FMC_D3 / EVENTOUT |
| Broche 94 | PD2 — GPIO PD2 / SDMMC1_CMD / EVENTOUT |
| Broche 95 | PD3 — GPIO PD3 / USART2_CTS / EVENTOUT |
| Broche 96 | PD4 — GPIO PD4 / USART2_RTS / EVENTOUT |
| Broche 97 | PD5 — GPIO PD5 / USART2_TX / EVENTOUT |
| Broche 98 | VSS — Ground |
| Broche 99 | VDD — Digital supply voltage |
| Broche 100 | PD6 — GPIO PD6 / USART2_RX / EVENTOUT |
| Broche 101 | PD7 — GPIO PD7 / USART2_CK / EVENTOUT |
| Broche 102 | PG9 — GPIO PG9 / DCMI_HSYNC / EVENTOUT |
| Broche 103 | PG10 — GPIO PG10 / DCMI_VSYNC / EVENTOUT |
| Broche 104 | PG11 — GPIO PG11 / DCMI_D5 / EVENTOUT |
| Broche 105 | PG12 — GPIO PG12 / FMC_NE4 / EVENTOUT |
| Broche 106 | PG13 — GPIO PG13 / FMC_A24 / EVENTOUT |
| Broche 107 | PG14 — GPIO PG14 / FMC_A25 / EVENTOUT |
| Broche 108 | VSS — Ground |
| Broche 109 | VDD — Digital supply voltage |
| Broche 110 | PG15 — GPIO PG15 / FMC_INT2 / EVENTOUT |
| Broche 111 | PB3 — GPIO PB3 / JTDO-SWO / SPI3_SCK / I2S3_CK / EVENTOUT |
| Broche 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO / I2S3ext_SD / EVENTOUT |
| Broche 113 | PB5 — GPIO PB5 / I2C1_SMBAI / SPI3_MOSI / I2S3_SD / EVENTOUT |
| Broche 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX / EVENTOUT |
| Broche 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX / EVENTOUT |
| Broche 116 | BOOT0 — Boot mode selection input |
| Broche 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL / EVENTOUT |
| Broche 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA / EVENTOUT |
| Broche 119 | PE0 — GPIO PE0 / TIM4_ETR / EVENTOUT |
| Broche 120 | PE1 — GPIO PE1 / EVENTOUT |
| Broche 121 | VSS — Ground |
| Broche 122 | VDD — Digital supply voltage |
| Broche 123 | PI0 — GPIO PI0 / FMC_D24 / EVENTOUT |
| Broche 124 | PI1 — GPIO PI1 / FMC_D25 / EVENTOUT |
| Broche 125 | PI2 — GPIO PI2 / FMC_D26 / EVENTOUT |
| Broche 126 | PI3 — GPIO PI3 / FMC_D27 / EVENTOUT |
| Broche 127 | VSS — Ground |
| Broche 128 | VDD — Digital supply voltage |
| Broche 129 | PA6_WKUP — WKUP pin / GPIO PA6 alternate |
| Broche 130 | PA0_WKUP — WKUP pin / GPIO PA0 alternate |
| Broche 131 | PI4 — GPIO PI4 / FMC_NBL2 / EVENTOUT |
| Broche 132 | PI5 — GPIO PI5 / FMC_NBL3 / EVENTOUT |
| Broche 133 | PI7 — GPIO PI7 / FMC_D29 / EVENTOUT |
| Broche 134 | PI9 — GPIO PI9 / FMC_D30 / EVENTOUT |
| Broche 135 | PI10 — GPIO PI10 / FMC_D31 / EVENTOUT |
| Broche 136 | PI11 — GPIO PI11 / EVENTOUT |
| Broche 137 | VSS — Ground |
| Broche 138 | VDD — Digital supply voltage |
| Broche 139 | PF0 — GPIO PF0 / FMC_A0 / I2C2_SDA / EVENTOUT |
| Broche 140 | PF1 — GPIO PF1 / FMC_A1 / I2C2_SCL / EVENTOUT |
| Broche 141 | PF2 — GPIO PF2 / FMC_A2 / EVENTOUT |
| Broche 142 | PF3 — GPIO PF3 / FMC_A3 / EVENTOUT |
| Broche 143 | PF4 — GPIO PF4 / FMC_A4 / EVENTOUT |
| Broche 144 | PF5 — GPIO PF5 / FMC_A5 / EVENTOUT |
Applications typiques
STM32F746ZGT6 convient pour 6 applications: 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%.
Recommandé
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%.
Recommandé
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%.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32F746ZGT6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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) |
Principaux différenciateurs
- Lower-cost pin-compatible Ethernet-less alternative available (vs STM32F745ZGT6)
- Extended temperature grade variant available (vs STM32F746ZGT7)
- Higher-performance upgrade to Cortex-M7 at 550 MHz (vs STM32H725REV6)
Notes de conception
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.
Informations de conformité
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.