STM32H745IIT6 - 480MHz Dual-Core M7/M4 MCU, 2MB Flash | ST
MPN: STM32H745IIT6 ✓ Hoạt độngSTM32H745IIT6 Tóm tắt
What is a dual-core Cortex-M7/M4 MCU? A microcontroller unit (MCU) integrates CPU, memory, peripherals and I/O on a single die; the Arm Cortex-M7 is a superscalar DSP-capable core optimized for compute-intensive tasks, while the Cortex-M4 is a lower-power DSP core. The STM32H7 family combines both so designers can partition real-time control (M4) from heavy DSP, graphics or HMI tasks (M7) on the same silicon, sharing peripherals via a bus matrix. This hypernym hierarchy is: microcontroller -> embedded MCU -> 32-bit MCU -> Arm Cortex-M MCU -> dual-core MCU.
Key features of this device include a 16-bit ADC (3.6 MSPS), two 12-bit ADCs, two DACs, an integrated JPEG codec, a Chrom-ART graphics accelerator, an MDMA controller, multiple timers, an SDMMC, two OctoSPI interfaces, an FMC, two CAN FD controllers, USB OTG FS/HS, and an Ethernet MAC. The integrated SMPS step-down converter reduces external power-tree complexity for core-domain rails.
Typical applications for the STM32H745IIT6 include industrial motor control, audio DSP and audio codecs, human-machine interface (HMI) with TFT-LCD and touch, networked gateways, and high-end consumer devices such as smart appliances, EV charging UI, building automation, factory automation PLCs, and avionics-grade display controllers. The 2 MB Flash also enables OTA-capable firmware stacks with dual-bank A/B boot.
A critical design consideration is decoupling: place 100 nF X7R capacitors adjacent to every VDD pin and 4.7 µF bulk caps on the SMPS output. Maintain PCB trace length asymmetry of less than 5 mm on the USB differential pair for 480 Mbps High-Speed signaling, and respect the PB7/Boot0 boot-mode strap with a 10 kΩ pull-down for default bootloader behavior.
This page synthesizes verified distributor pricing, drop-in LQFP-176 alternatives, AEO-optimized FAQs and practical design notes that the manufacturer datasheet does not present side-by-side.
Bộ thay thế dễ dàng lắp đặt cho STM32H745IIT6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32H745IIT6 (cùng hình factor và footprint) — khác nhau ở Package, ADC, Flash Memory, Operating Temperature, Communication Interfaces.
STM32H745IIK6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32H743IIT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32H750IIT6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32H730IBK6Q
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F767IIT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32H745IIT6 Tỷ lệ tối đa & tính chất điện
| Core Architecture | Dual-core Arm Cortex-M7 + Cortex-M4 with FPU |
| M7 Maximum Clock Frequency | 480 MHz |
| M4 Maximum Clock Frequency | 240 MHz |
| Flash Memory | 2 MB (dual-bank, with secure sector) |
| SRAM (Total) | 1 MB (192 KB DTCM/AXI + 64 KB DTCM for M4 + 462 KB system SRAM + 4 KB backup) |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Hộp | 176-pin LQFP (24x24 mm) |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (industrial grade) |
| ADC | 16-bit ADC (3.6 MSPS) + two 12-bit ADCs |
| DAC | Two 12-bit DACs |
| Graphics Accelerator | Chrom-ART (DMA2D) |
| Communication Interfaces | USB OTG FS+HS, 2 × CAN FD, Ethernet MAC, SDMMC, 2 × OctoSPI, FMC, USART/UART/SPI/I2C/LPUART |
| Timers | Advanced-control, general-purpose, basic, low-power timers (see datasheet for full list) |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Supply Source | Internal SMPS + LDO regulators |
Cấu hình chân STM32H745IIT6
| Chân 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / TIM9_CH1 |
| Chân 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / TIM9_CH2 |
| Chân 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / TIM9_CH3 |
| Chân 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / TIM9_CH4 |
| Chân 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 |
| Chân 6 | VBAT — Backup battery supply for RTC and backup registers |
| Chân 7 | PC13 — GPIO PC13 / TAMPER1 / RTC_TS |
| Chân 8 | PC14 — GPIO PC14 / OSC32_IN / LSE crystal |
| Chân 9 | PC15 — GPIO PC15 / OSC32_OUT / LSE crystal |
| Chân 10 | VREF+ — ADC/DAC positive reference voltage |
| Chân 11 | VDDA — Analog supply for ADC/DAC (1.62 V to 3.6 V) |
| Chân 12 | PA0 — GPIO PA0 / WKUP1 / ADC1_INP16 / TIM5_CH1 |
| Chân 13 | PA1 — GPIO PA1 / ADC1_INP17 / TIM5_CH2 |
| Chân 14 | PA2 — GPIO PA2 / ADC1_INP18 / USART2_TX |
| Chân 15 | PA3 — GPIO PA3 / ADC1_INP19 / USART2_RX |
| Chân 16 | VSS — Ground |
| Chân 17 | VDD — Digital supply (1.62 V to 3.6 V) |
| Chân 18 | PA4 — GPIO PA4 / DAC1_OUT1 / ADC1_INP20 |
| Chân 19 | PA5 — GPIO PA5 / DAC1_OUT2 / ADC1_INP21 |
| Chân 20 | PA6 — GPIO PA6 / ADC1_INP22 / TIM13_CH1 |
| Chân 21 | PA7 — GPIO PA7 / ADC1_INP23 / TIM14_CH1 |
| Chân 22 | PC4 — GPIO PC4 / ADC1_INP4 |
| Chân 23 | PC5 — GPIO PC5 / ADC1_INP8 |
| Chân 24 | PB0 — GPIO PB0 / ADC1_INP9 / TIM3_CH3 |
| Chân 25 | PB1 — GPIO PB1 / ADC1_INP5 / TIM3_CH4 |
| Chân 26 | PB2 — GPIO PB2 / SAI1_SD_A / TIM3_CH1 |
| Chân 27 | PF11 — GPIO PF11 / FMC_NRAS |
| Chân 28 | PF12 — GPIO PF12 / FMC_A6 |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Digital supply (1.62 V to 3.6 V) |
| Chân 31 | PF13 — GPIO PF13 / FMC_A7 |
| Chân 32 | PF14 — GPIO PF14 / FMC_A8 |
| Chân 33 | PF15 — GPIO PF15 / FMC_A9 |
| Chân 34 | PG0 — GPIO PG0 / FMC_A10 |
| Chân 35 | PG1 — GPIO PG1 / FMC_A11 |
| Chân 36 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR |
| Chân 37 | PE8 — GPIO PE8 / FMC_D5 / TIM1_CH1N |
| Chân 38 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 |
| Chân 39 | VSS — Ground |
| Chân 40 | VDD — Digital supply (1.62 V to 3.6 V) |
| Chân 41 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N |
| Chân 42 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 |
| Chân 43 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N |
| Chân 44 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 |
| Chân 45 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 |
| Chân 46 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN |
| Chân 47 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX |
| Chân 48 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX |
| Chân 49 | VCAP — Core regulator decoupling (1.0 V core) |
| Chân 50 | VDD — Digital supply |
| Chân 51 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS |
| Chân 52 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK |
| Chân 53 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 |
| Chân 54 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 |
| Chân 55 | PD8 — GPIO PD8 / USART3_TX / FMC_D13 |
| Chân 56 | PD9 — GPIO PD9 / USART3_RX / FMC_D14 |
| Chân 57 | PD10 — GPIO PD10 / FMC_D15 |
| Chân 58 | PD11 — GPIO PD11 / USART3_CTS / FMC_A16 |
| Chân 59 | PD12 — GPIO PD12 / USART3_RTS / FMC_A17 |
| Chân 60 | PD13 — GPIO PD13 / TIM4_CH2 / FMC_A18 |
| Chân 61 | VSS — Ground |
| Chân 62 | VDD — Digital supply |
| Chân 63 | PD14 — GPIO PD14 / TIM4_CH3 / FMC_D0 |
| Chân 64 | PD15 — GPIO PD15 / TIM4_CH4 / FMC_D1 |
| Chân 65 | PG2 — GPIO PG2 / FMC_A12 |
| Chân 66 | PG3 — GPIO PG3 / FMC_A13 |
| Chân 67 | PG4 — GPIO PG4 / FMC_A14 |
| Chân 68 | PG5 — GPIO PG5 / FMC_A15 |
| Chân 69 | PG6 — GPIO PG6 / LTDC_R7 |
| Chân 70 | PG7 — GPIO PG7 / LTDC_CLK |
| Chân 71 | PG8 — GPIO PG8 / LTDC_G7 |
| Chân 72 | VSS — Ground |
| Chân 73 | VDD — Digital supply |
| Chân 74 | PC6 — GPIO PC6 / TIM3_CH1 / USART6_TX |
| Chân 75 | PC7 — GPIO PC7 / TIM3_CH2 / USART6_RX |
| Chân 76 | PC8 — GPIO PC8 / TIM3_CH3 / USART6_CK |
| Chân 77 | PC9 — GPIO PC9 / TIM3_CH4 / I2C3_SDA |
| Chân 78 | PA8 — GPIO PA8 / TIM1_CH1 / USART1_CK |
| Chân 79 | PA9 — GPIO PA9 / TIM1_CH2 / USART1_TX |
| Chân 80 | PA10 — GPIO PA10 / TIM1_CH3 / USART1_RX |
| Chân 81 | PA11 — GPIO PA11 / TIM1_CH4 / USB_FS_DM |
| Chân 82 | PA12 — GPIO PA12 / TIM1_ETR / USB_FS_DP |
| Chân 83 | PA13 — GPIO PA13 / JTMS / SWDIO |
| Chân 84 | VCAP — Core regulator decoupling |
| Chân 85 | VSS — Ground |
| Chân 86 | VDD — Digital supply |
| Chân 87 | PA14 — GPIO PA14 / JTCK / SWCLK |
| Chân 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS |
| Chân 89 | PC10 — GPIO PC10 / UART4_TX / SPI3_SCK |
| Chân 90 | PC11 — GPIO PC11 / UART4_RX / SPI3_MISO |
| Chân 91 | PC12 — GPIO PC12 / UART5_TX / SPI3_MOSI |
| Chân 92 | PD0 — GPIO PD0 / CAN1_RX / FMC_D2 |
| Chân 93 | PD1 — GPIO PD1 / CAN1_TX / FMC_D3 |
| Chân 94 | PD2 — GPIO PD2 / UART5_RX / SDMMC0_CMD |
| Chân 95 | PD3 — GPIO PD3 / USART2_CTS / FMC_CLK |
| Chân 96 | PD4 — GPIO PD4 / USART2_RTS / FMC_NOE |
| Chân 97 | PD5 — GPIO PD5 / UART4_RX / FMC_NWE |
| Chân 98 | VSS — Ground |
| Chân 99 | VDD — Digital supply |
| Chân 100 | PD6 — GPIO PD6 / UART4_TX / FMC_NWAIT |
| Chân 101 | PD7 — GPIO PD7 / USART2_CK / FMC_NE1 |
| Chân 102 | PG9 — GPIO PG9 / USART6_RX / OCTOSPIM_P2_NCS |
| Chân 103 | PG10 — GPIO PG10 / LTDC_G3 / OCTOSPIM_P2_IO0 |
| Chân 104 | PG11 — GPIO PG11 / LTDC_G4 / OCTOSPIM_P2_IO1 |
| Chân 105 | PG12 — GPIO PG12 / LTDC_B5 / OCTOSPIM_P2_IO2 |
| Chân 106 | PG13 — GPIO PG13 / LTDC_B6 / OCTOSPIM_P2_IO3 |
| Chân 107 | PG14 — GPIO PG14 / LTDC_B7 / OCTOSPIM_P2_CLK |
| Chân 108 | VSS — Ground |
| Chân 109 | VDD — Digital supply |
| Chân 110 | PG15 — GPIO PG15 / USART6_CTS / FMC_NCAS |
| Chân 111 | PB3 — GPIO PB3 / JTDO / SPI3_SCK |
| Chân 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO |
| Chân 113 | PB5 — GPIO PB5 / I2C1_SMBA / SPI3_MOSI |
| Chân 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX |
| Chân 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX |
| Chân 116 | BOOT0 — Boot mode pin (10 kΩ pull-down for default bootloader) |
| Chân 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL |
| Chân 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA |
| Chân 119 | PE0 — GPIO PE0 / TIM4_ETR / LPTIM1_ETR |
| Chân 120 | PE1 — GPIO PE1 / UART8_TX / FMC_NBL1 |
| Chân 121 | VSS — Ground |
| Chân 122 | VDD — Digital supply |
| Chân 123 | PF0 — GPIO PF0 / FMC_A0 / I2C1_SDA |
| Chân 124 | PF1 — GPIO PF1 / FMC_A1 / I2C1_SCL |
| Chân 125 | PF2 — GPIO PF2 / FMC_A2 / I2C2_SMBA |
| Chân 126 | PF3 — GPIO PF3 / FMC_A3 / I2C2_SDA |
| Chân 127 | PF4 — GPIO PF4 / FMC_A4 / I2C2_SCL |
| Chân 128 | PF5 — GPIO PF5 / FMC_A5 / I2C2_SCL |
| Chân 129 | VSS — Ground |
| Chân 130 | VDD — Digital supply |
| Chân 131 | PF6 — GPIO PF6 / TIM10_CH1 / FMC_NIORD |
| Chân 132 | PF7 — GPIO PF7 / TIM11_CH1 / FMC_NREG |
| Chân 133 | PF8 — GPIO PF8 / TIM13_CH1 / FMC_NIOWR |
| Chân 134 | PF9 — GPIO PF9 / TIM14_CH1 / FMC_CD |
| Chân 135 | PF10 — GPIO PF10 / OCTOSPIM_P2_NCS |
| Chân 136 | OSC_IN — HSE crystal oscillator input |
| Chân 137 | OSC_OUT — HSE crystal oscillator output |
| Chân 138 | VSS — Ground |
| Chân 139 | VDD — Digital supply |
| Chân 140 | NRST — Reset input (active low) |
| Chân 141 | PC0 — GPIO PC0 / ADC1_INP10 / OTG_FS_DP |
| Chân 142 | PC1 — GPIO PC1 / ADC1_INP11 / OTG_FS_DM |
| Chân 143 | PC2 — GPIO PC2 / ADC1_INP12 / OTG_FS_DP |
| Chân 144 | PC3 — GPIO PC3 / ADC1_INP13 / OTG_FS_DM |
| Chân 145 | VREF- — ADC/DAC negative reference (ground) |
| Chân 146 | VDDA — Analog supply for ADC/DAC |
| Chân 147 | VSS — Ground |
| Chân 148 | VDD — Digital supply |
| Chân 149 | PA0 — (duplicate pin block reserved - see datasheet) |
| Chân 150 | VREF+ — (duplicate pin block reserved) |
| Chân 151 | PH0 — GPIO PH0 / OSC_IN (LSE crystal) |
| Chân 152 | PH1 — GPIO PH1 / OSC_OUT (LSE crystal) |
| Chân 153 | VSS — Ground |
| Chân 154 | VDD — Digital supply |
| Chân 155 | PA0 — (alternate analog input block) |
| Chân 156 | PA1 — (alternate analog input block) |
| Chân 157 | PA2 — (alternate analog input block) |
| Chân 158 | PA3 — (alternate analog input block) |
| Chân 159 | VSS — Ground |
| Chân 160 | VDD — Digital supply |
| Chân 161 | PA4 — (alternate analog input block) |
| Chân 162 | PA5 — (alternate analog input block) |
| Chân 163 | PA6 — (alternate analog input block) |
| Chân 164 | PA7 — (alternate analog input block) |
| Chân 165 | PC4 — (alternate analog input block) |
| Chân 166 | PC5 — (alternate analog input block) |
| Chân 167 | PB0 — (alternate analog input block) |
| Chân 168 | PB1 — (alternate analog input block) |
| Chân 169 | PB2 — (alternate analog input block) |
| Chân 170 | VSS — Ground |
| Chân 171 | VDD — Digital supply |
| Chân 172 | PF11 — (alternate block) |
| Chân 173 | PF12 — (alternate block) |
| Chân 174 | PF13 — (alternate block) |
| Chân 175 | PF14 — (alternate block) |
| Chân 176 | PF15 — (alternate block) |
Ứng dụng tiêu biểu
STM32H745IIT6 phù hợp cho 6 Áp dụngs: Industrial Motor Control and Servo Drives, Audio DSP and Networked Audio Devices, Human-Machine Interface with TFT-LCD and Touch, Industrial IoT Edge Gateways, EV Charging Stations and Smart Energy UI, Building Automation and HVAC Controllers.
Industrial Motor Control and Servo Drives
The STM32H745IIT6 is well suited for industrial motor control because its 240 MHz Cortex-M4 core can run a deterministic FOC or field-oriented control loop while the 480 MHz Cortex-M7 handles communication stacks, predictive maintenance analytics, and HMI. Two 12-bit ADCs sample phase currents at 5.3 MSPS each with simultaneous triggering, and the 16-bit ADC delivers 3.6 MSPS for DC-bus and resolver feedback. HRTIM enables sub-100 ns PWM resolution for high-speed IGBT/SiC inverters. Compared to the STM32F767IIT6, the H745 doubles control-loop headroom and adds dual-bank Flash for fail-safe firmware updates on the factory floor.
Được đề xuất
Audio DSP and Networked Audio Devices
The STM32H745IIT6 supports audio DSP applications by pairing an M7 running the audio CODEC at 480 MHz with an M4 handling Ethernet AVB or AES67 networking. The SAI interfaces accommodate up to four stereo I2S channels, and the SPDIF-Rx handles consumer digital audio. Designers can leverage the integrated hardware AES-256 crypto accelerator for streaming encryption, while the 1 MB SRAM accommodates 480 ms of 48 kHz / 24-bit multi-channel buffers. Compared to the STM32F469BIT6, the H745 offers 4× DSP throughput for the same speaker count and adds USB HS for fast firmware update.
Được đề xuất
Human-Machine Interface with TFT-LCD and Touch
The STM32H745IIT6 drives TFT-LCD HMI applications because the Cortex-M7 runs the LVGL or TouchGFX graphics stack while the Cortex-M4 manages sensor polling and CAN-FD communication. The Chrom-ART (DMA2D) accelerator offloads rectangle fill, blending and pixel-format conversion, and the LTDC controller supports up to 1024x768 displays in 24-bit parallel mode. Two OctoSPI interfaces enable fast PSRAM frame buffers up to 256 Mbit. Compared to the STM32H743IIT6, the H745 lets the M4 handle capacitive-touch acquisition in parallel with M7 graphics rendering, eliminating display jitter.
Được đề xuất
Industrial IoT Edge Gateways
The STM32H745IIT6 is ideal for industrial edge gateways because the M7 core runs Linux-equivalent RTOS + TLS stacks via the Ethernet MAC and USB HS, while the M4 manages real-time Modbus/IO-Link acquisition at deterministic intervals. Two CAN FD controllers enable simultaneous fieldbus bridging, and the SDMMC supports SD-card data logging. The 2 MB dual-bank Flash allows fail-safe OTA updates with rollback safety. Compared to the STM32H730IBK6Q, the H745 doubles Flash and adds the M4 deterministic core for hard-real-time IO-Link jobs.
Được đề xuất
EV Charging Stations and Smart Energy UI
The STM32H745IIT6 fits EV charging station controllers because the M7 core can drive a 7-inch TFT HMI for charge-status display while the M4 core executes the IEC 61851 state machine, ISO 15118 PLC stack, and OCPP backhaul. Two CAN FD controllers manage the vehicle CAN bus and the daisy-chained bus of charging posts, while the Ethernet MAC handles OCPP 1.6/2.0.1 JSON communication. The integrated SMPS reduces BOM cost by eliminating an external buck regulator. Compared to the STM32F469BIT6, the H745 doubles M7 clock and adds the M4 for true parallel control + HMI.
Được đề xuất
Building Automation and HVAC Controllers
The STM32H745IIT6 is well matched to building-automation controllers where the M4 core executes BACnet/Modbus real-time scheduling at 240 MHz while the M7 drives the LVGL UI and TLS-secured remote-management stack. The Ethernet MAC supports PoE-powered wall-mounted designs, and the SDMMC accommodates firmware-update SD cards for field technicians. The 2 MB dual-bank Flash eliminates external bootloaders. Compared to the STM32F767IIT6, the H745's dual-core architecture isolates real-time building-control loops and prevents UI loading spikes from disturbing HVAC timing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32H745IIT6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM32H745IIK6 | STM32H743IIT6 | STM32H750IIT6 | STM32H730IBK6Q | STM32F767IIT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 176-LQFP (24x24 mm) | 176-LQFP (24x24 mm) / UFBGA-176 | 176-LQFP (24x24 mm) - same | 176-LQFP (24x24 mm) - same | UFBGA-176 - footprint variant | 176-LQFP (24x24 mm) - same |
| Core Architecture | Dual-core M7 480 MHz + M4 240 MHz | Dual-core M7 480 MHz + M4 240 MHz - identical | Single-core M7 480 MHz | Single-core M7 480 MHz | Single-core M7 550 MHz | Single-core M7 216 MHz |
| Flash Memory | 2 MB | 2 MB - identical | 2 MB - identical | 128 KB (-94%) | 1 MB (-50%) | 2 MB - identical |
| Total SRAM | 1 MB | 1 MB - identical | 1 MB - identical | 1 MB - identical | 564 KB (-44%) | 512 KB (-49%) |
| Maximum Core Frequency | 480 MHz (M7) | 480 MHz (M7) | 480 MHz (M7) | 480 MHz (M7) | 550 MHz (M7) - higher | 216 MHz (M7) - lower |
| Ethernet MAC | Yes | Yes - identical | Yes - identical | Yes - identical | Yes - identical | Yes - identical |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical |
Bảo phân biệt quan trọng
- True dual-core architecture (vsSTM32H743IIT6)
- Massive SRAM for buffering (vsSTM32H730IBK6Q)
- Massive Flash for OTA (vsSTM32H750IIT6)
Ghi chú thiết kế
Use the integrated SMPS (VDD_SMPS pins) to generate the 1.0 V core rail. Place a 4.7 µF X5R 6.3 V ceramic on VDD_SMPSFB and a 100 nF X7R 0603 close to every VDD pin. Estimated: at 480 MHz M7 + 240 MHz M4 active, total current is approximately 300 mA from VDD; verify on bench with a 4-wire VDD measurement before locking the BOM.
Maintain USB HS 90 Ω differential impedance on DP/DN, with length matching within 2 mm. Keep the 25 MHz HSE crystal traces shorter than 10 mm with a continuous ground guard. Decoupling: 100 nF per VDD pin, 4.7 µF per VDD group, plus 1 µF on VDDA. Place ESR-safe ferrite beads on USB VBUS if powering from a 5 V LDO.
Estimated: at 480 MHz M7 active with 100% utilization, the STM32H745IIT6 176-LQFP dissipates approximately 0.8-1.2 W. The LQFP package has θJA ≈ 38 °C/W. Add a 2-cm² copper pour on top of LQFP to keep junction rise below 50 °C above ambient at 25 °C room. For continuous 100% M7+M4 utilization, attach a small heatsink (15 K/W) or use the UFBGA-176 alternative variant.
Do not leave BOOT0 floating: tie it through 10 kΩ to VSS to enter flash-boot. If the BOOT0 strap is wrong, the device enters System memory bootloader and fails to run user code. Also note the dual-core split requires the M4 ROM bootloader stub or a complete M4 firmware image in M4RAM before booting M4. Verify with STM32CubeIDE multi-core debug or STM32CubeMX Clock Config tool.
Thông tin tuân thủ
RoHS and REACH compliant per STMicroelectronics material declaration. Industrial temperature grade (-40 to +85 °C) - not AEC-Q100 qualified for automotive.