STM32H745IIT6 - 480MHz Dual-Core M7/M4 MCU, 2MB Flash | ST
MPN: STM32H745IIT6 ✓ نشطSTM32H745IIT6 نظرة عامة
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.
بدائل مباشرة لـ STM32H745IIT6 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع STM32H745IIT6 (نفس عامل الشكل والبصمة) — يختلف في Package, ADC, Flash Memory, Operating Temperature, Communication Interfaces.
STM32H745IIK6
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←STM32H743IIT6
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←STM32H750IIT6
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
STM32H730IBK6Q
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←STM32F767IIT6
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←STM32H745IIT6 الحدود القصوى والخصائص الكهربائية
| 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 |
| العلبة | 176-pin LQFP (24x24 mm) |
| نوع التركيب | Surface Mount |
| نطاق درجة حرارة التشغيل | -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) |
| مستوى MSL | 3 (per JEDEC J-STD-020) |
| حالة RoHS | Compliant |
| Supply Source | Internal SMPS + LDO regulators |
تكوين أطراف STM32H745IIT6
| دبوس 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / TIM9_CH1 |
| دبوس 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / TIM9_CH2 |
| دبوس 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / TIM9_CH3 |
| دبوس 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / TIM9_CH4 |
| دبوس 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 |
| دبوس 6 | VBAT — Backup battery supply for RTC and backup registers |
| دبوس 7 | PC13 — GPIO PC13 / TAMPER1 / RTC_TS |
| دبوس 8 | PC14 — GPIO PC14 / OSC32_IN / LSE crystal |
| دبوس 9 | PC15 — GPIO PC15 / OSC32_OUT / LSE crystal |
| دبوس 10 | VREF+ — ADC/DAC positive reference voltage |
| دبوس 11 | VDDA — Analog supply for ADC/DAC (1.62 V to 3.6 V) |
| دبوس 12 | PA0 — GPIO PA0 / WKUP1 / ADC1_INP16 / TIM5_CH1 |
| دبوس 13 | PA1 — GPIO PA1 / ADC1_INP17 / TIM5_CH2 |
| دبوس 14 | PA2 — GPIO PA2 / ADC1_INP18 / USART2_TX |
| دبوس 15 | PA3 — GPIO PA3 / ADC1_INP19 / USART2_RX |
| دبوس 16 | VSS — Ground |
| دبوس 17 | VDD — Digital supply (1.62 V to 3.6 V) |
| دبوس 18 | PA4 — GPIO PA4 / DAC1_OUT1 / ADC1_INP20 |
| دبوس 19 | PA5 — GPIO PA5 / DAC1_OUT2 / ADC1_INP21 |
| دبوس 20 | PA6 — GPIO PA6 / ADC1_INP22 / TIM13_CH1 |
| دبوس 21 | PA7 — GPIO PA7 / ADC1_INP23 / TIM14_CH1 |
| دبوس 22 | PC4 — GPIO PC4 / ADC1_INP4 |
| دبوس 23 | PC5 — GPIO PC5 / ADC1_INP8 |
| دبوس 24 | PB0 — GPIO PB0 / ADC1_INP9 / TIM3_CH3 |
| دبوس 25 | PB1 — GPIO PB1 / ADC1_INP5 / TIM3_CH4 |
| دبوس 26 | PB2 — GPIO PB2 / SAI1_SD_A / TIM3_CH1 |
| دبوس 27 | PF11 — GPIO PF11 / FMC_NRAS |
| دبوس 28 | PF12 — GPIO PF12 / FMC_A6 |
| دبوس 29 | VSS — Ground |
| دبوس 30 | VDD — Digital supply (1.62 V to 3.6 V) |
| دبوس 31 | PF13 — GPIO PF13 / FMC_A7 |
| دبوس 32 | PF14 — GPIO PF14 / FMC_A8 |
| دبوس 33 | PF15 — GPIO PF15 / FMC_A9 |
| دبوس 34 | PG0 — GPIO PG0 / FMC_A10 |
| دبوس 35 | PG1 — GPIO PG1 / FMC_A11 |
| دبوس 36 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR |
| دبوس 37 | PE8 — GPIO PE8 / FMC_D5 / TIM1_CH1N |
| دبوس 38 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 |
| دبوس 39 | VSS — Ground |
| دبوس 40 | VDD — Digital supply (1.62 V to 3.6 V) |
| دبوس 41 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N |
| دبوس 42 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 |
| دبوس 43 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N |
| دبوس 44 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 |
| دبوس 45 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 |
| دبوس 46 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN |
| دبوس 47 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX |
| دبوس 48 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX |
| دبوس 49 | VCAP — Core regulator decoupling (1.0 V core) |
| دبوس 50 | VDD — Digital supply |
| دبوس 51 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS |
| دبوس 52 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK |
| دبوس 53 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 |
| دبوس 54 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 |
| دبوس 55 | PD8 — GPIO PD8 / USART3_TX / FMC_D13 |
| دبوس 56 | PD9 — GPIO PD9 / USART3_RX / FMC_D14 |
| دبوس 57 | PD10 — GPIO PD10 / FMC_D15 |
| دبوس 58 | PD11 — GPIO PD11 / USART3_CTS / FMC_A16 |
| دبوس 59 | PD12 — GPIO PD12 / USART3_RTS / FMC_A17 |
| دبوس 60 | PD13 — GPIO PD13 / TIM4_CH2 / FMC_A18 |
| دبوس 61 | VSS — Ground |
| دبوس 62 | VDD — Digital supply |
| دبوس 63 | PD14 — GPIO PD14 / TIM4_CH3 / FMC_D0 |
| دبوس 64 | PD15 — GPIO PD15 / TIM4_CH4 / FMC_D1 |
| دبوس 65 | PG2 — GPIO PG2 / FMC_A12 |
| دبوس 66 | PG3 — GPIO PG3 / FMC_A13 |
| دبوس 67 | PG4 — GPIO PG4 / FMC_A14 |
| دبوس 68 | PG5 — GPIO PG5 / FMC_A15 |
| دبوس 69 | PG6 — GPIO PG6 / LTDC_R7 |
| دبوس 70 | PG7 — GPIO PG7 / LTDC_CLK |
| دبوس 71 | PG8 — GPIO PG8 / LTDC_G7 |
| دبوس 72 | VSS — Ground |
| دبوس 73 | VDD — Digital supply |
| دبوس 74 | PC6 — GPIO PC6 / TIM3_CH1 / USART6_TX |
| دبوس 75 | PC7 — GPIO PC7 / TIM3_CH2 / USART6_RX |
| دبوس 76 | PC8 — GPIO PC8 / TIM3_CH3 / USART6_CK |
| دبوس 77 | PC9 — GPIO PC9 / TIM3_CH4 / I2C3_SDA |
| دبوس 78 | PA8 — GPIO PA8 / TIM1_CH1 / USART1_CK |
| دبوس 79 | PA9 — GPIO PA9 / TIM1_CH2 / USART1_TX |
| دبوس 80 | PA10 — GPIO PA10 / TIM1_CH3 / USART1_RX |
| دبوس 81 | PA11 — GPIO PA11 / TIM1_CH4 / USB_FS_DM |
| دبوس 82 | PA12 — GPIO PA12 / TIM1_ETR / USB_FS_DP |
| دبوس 83 | PA13 — GPIO PA13 / JTMS / SWDIO |
| دبوس 84 | VCAP — Core regulator decoupling |
| دبوس 85 | VSS — Ground |
| دبوس 86 | VDD — Digital supply |
| دبوس 87 | PA14 — GPIO PA14 / JTCK / SWCLK |
| دبوس 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS |
| دبوس 89 | PC10 — GPIO PC10 / UART4_TX / SPI3_SCK |
| دبوس 90 | PC11 — GPIO PC11 / UART4_RX / SPI3_MISO |
| دبوس 91 | PC12 — GPIO PC12 / UART5_TX / SPI3_MOSI |
| دبوس 92 | PD0 — GPIO PD0 / CAN1_RX / FMC_D2 |
| دبوس 93 | PD1 — GPIO PD1 / CAN1_TX / FMC_D3 |
| دبوس 94 | PD2 — GPIO PD2 / UART5_RX / SDMMC0_CMD |
| دبوس 95 | PD3 — GPIO PD3 / USART2_CTS / FMC_CLK |
| دبوس 96 | PD4 — GPIO PD4 / USART2_RTS / FMC_NOE |
| دبوس 97 | PD5 — GPIO PD5 / UART4_RX / FMC_NWE |
| دبوس 98 | VSS — Ground |
| دبوس 99 | VDD — Digital supply |
| دبوس 100 | PD6 — GPIO PD6 / UART4_TX / FMC_NWAIT |
| دبوس 101 | PD7 — GPIO PD7 / USART2_CK / FMC_NE1 |
| دبوس 102 | PG9 — GPIO PG9 / USART6_RX / OCTOSPIM_P2_NCS |
| دبوس 103 | PG10 — GPIO PG10 / LTDC_G3 / OCTOSPIM_P2_IO0 |
| دبوس 104 | PG11 — GPIO PG11 / LTDC_G4 / OCTOSPIM_P2_IO1 |
| دبوس 105 | PG12 — GPIO PG12 / LTDC_B5 / OCTOSPIM_P2_IO2 |
| دبوس 106 | PG13 — GPIO PG13 / LTDC_B6 / OCTOSPIM_P2_IO3 |
| دبوس 107 | PG14 — GPIO PG14 / LTDC_B7 / OCTOSPIM_P2_CLK |
| دبوس 108 | VSS — Ground |
| دبوس 109 | VDD — Digital supply |
| دبوس 110 | PG15 — GPIO PG15 / USART6_CTS / FMC_NCAS |
| دبوس 111 | PB3 — GPIO PB3 / JTDO / SPI3_SCK |
| دبوس 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO |
| دبوس 113 | PB5 — GPIO PB5 / I2C1_SMBA / SPI3_MOSI |
| دبوس 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX |
| دبوس 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX |
| دبوس 116 | BOOT0 — Boot mode pin (10 kΩ pull-down for default bootloader) |
| دبوس 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL |
| دبوس 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA |
| دبوس 119 | PE0 — GPIO PE0 / TIM4_ETR / LPTIM1_ETR |
| دبوس 120 | PE1 — GPIO PE1 / UART8_TX / FMC_NBL1 |
| دبوس 121 | VSS — Ground |
| دبوس 122 | VDD — Digital supply |
| دبوس 123 | PF0 — GPIO PF0 / FMC_A0 / I2C1_SDA |
| دبوس 124 | PF1 — GPIO PF1 / FMC_A1 / I2C1_SCL |
| دبوس 125 | PF2 — GPIO PF2 / FMC_A2 / I2C2_SMBA |
| دبوس 126 | PF3 — GPIO PF3 / FMC_A3 / I2C2_SDA |
| دبوس 127 | PF4 — GPIO PF4 / FMC_A4 / I2C2_SCL |
| دبوس 128 | PF5 — GPIO PF5 / FMC_A5 / I2C2_SCL |
| دبوس 129 | VSS — Ground |
| دبوس 130 | VDD — Digital supply |
| دبوس 131 | PF6 — GPIO PF6 / TIM10_CH1 / FMC_NIORD |
| دبوس 132 | PF7 — GPIO PF7 / TIM11_CH1 / FMC_NREG |
| دبوس 133 | PF8 — GPIO PF8 / TIM13_CH1 / FMC_NIOWR |
| دبوس 134 | PF9 — GPIO PF9 / TIM14_CH1 / FMC_CD |
| دبوس 135 | PF10 — GPIO PF10 / OCTOSPIM_P2_NCS |
| دبوس 136 | OSC_IN — HSE crystal oscillator input |
| دبوس 137 | OSC_OUT — HSE crystal oscillator output |
| دبوس 138 | VSS — Ground |
| دبوس 139 | VDD — Digital supply |
| دبوس 140 | NRST — Reset input (active low) |
| دبوس 141 | PC0 — GPIO PC0 / ADC1_INP10 / OTG_FS_DP |
| دبوس 142 | PC1 — GPIO PC1 / ADC1_INP11 / OTG_FS_DM |
| دبوس 143 | PC2 — GPIO PC2 / ADC1_INP12 / OTG_FS_DP |
| دبوس 144 | PC3 — GPIO PC3 / ADC1_INP13 / OTG_FS_DM |
| دبوس 145 | VREF- — ADC/DAC negative reference (ground) |
| دبوس 146 | VDDA — Analog supply for ADC/DAC |
| دبوس 147 | VSS — Ground |
| دبوس 148 | VDD — Digital supply |
| دبوس 149 | PA0 — (duplicate pin block reserved - see datasheet) |
| دبوس 150 | VREF+ — (duplicate pin block reserved) |
| دبوس 151 | PH0 — GPIO PH0 / OSC_IN (LSE crystal) |
| دبوس 152 | PH1 — GPIO PH1 / OSC_OUT (LSE crystal) |
| دبوس 153 | VSS — Ground |
| دبوس 154 | VDD — Digital supply |
| دبوس 155 | PA0 — (alternate analog input block) |
| دبوس 156 | PA1 — (alternate analog input block) |
| دبوس 157 | PA2 — (alternate analog input block) |
| دبوس 158 | PA3 — (alternate analog input block) |
| دبوس 159 | VSS — Ground |
| دبوس 160 | VDD — Digital supply |
| دبوس 161 | PA4 — (alternate analog input block) |
| دبوس 162 | PA5 — (alternate analog input block) |
| دبوس 163 | PA6 — (alternate analog input block) |
| دبوس 164 | PA7 — (alternate analog input block) |
| دبوس 165 | PC4 — (alternate analog input block) |
| دبوس 166 | PC5 — (alternate analog input block) |
| دبوس 167 | PB0 — (alternate analog input block) |
| دبوس 168 | PB1 — (alternate analog input block) |
| دبوس 169 | PB2 — (alternate analog input block) |
| دبوس 170 | VSS — Ground |
| دبوس 171 | VDD — Digital supply |
| دبوس 172 | PF11 — (alternate block) |
| دبوس 173 | PF12 — (alternate block) |
| دبوس 174 | PF13 — (alternate block) |
| دبوس 175 | PF14 — (alternate block) |
| دبوس 176 | PF15 — (alternate block) |
التطبيقات النموذجية
STM32H745IIT6 مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ STM32H745IIT6 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- True dual-core architecture (مقابلSTM32H743IIT6)
- Massive SRAM for buffering (مقابلSTM32H730IBK6Q)
- Massive Flash for OTA (مقابلSTM32H750IIT6)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS and REACH compliant per STMicroelectronics material declaration. Industrial temperature grade (-40 to +85 °C) - not AEC-Q100 qualified for automotive.