STM32H743IGT6 - 480MHz Cortex-M7 MCU 1MB Flash | STMicroelectronics
N.º da peça: STM32H743IGT6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $16.2 | $16,20 |
| 10 | $14.85 | $148,50 |
| 100 | $13.42 | $1.342,00 |
| 500 | $12.18 | $6.090,00 |
| 1.000 | $11.05 | $11.050,00 |
STM32H743IGT6 Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The STM32H743 belongs to the 32-bit MCU family (ARM Cortex-M class), which sits above 8-bit/16-bit microcontrollers in the semiconductor hierarchy: transistor -> logic gate -> CPU core -> microcontroller -> embedded system. Cortex-M7 devices target high-performance embedded applications that previously required a DSP or microprocessor, and the STM32H7 line extends the STM32 family from mainstream (F0/F1/F4) into premium real-time processing tiers.
Key features of the STM32H743IGT6 include: 1 MB dual-bank Flash with ECC, 1 MB SRAM split into DTCM, AXI SRAM, SRAM1-4, and Backup SRAM; a 16-bit Chrom-ART (DMA2D) accelerator; JPEG codec in hardware; up to 35 communication interfaces including 3x SPI, 4x USART/UART, 2x UART, 3x I2C, 2x CAN, USB 2.0 FS+OTG, SDMMC, and Ethernet; a 16-bit parallel camera interface; and 3x 12-bit ADCs at 3.6 MSPS plus 2x 12-bit DACs. The internal SMPS step-down converter reduces core current consumption by approximately 30% versus an external LDO supply.
The architecture uses a 7-stage superscalar pipeline with branch prediction, single-precision and double-precision FPU, and an instruction/data cache. The AXI bus matrix (64-bit wide, 480 MHz) gives sustained memory bandwidth above 4 MB/s, suitable for TFT-LCD framebuffers and audio streaming. Advanced peripherals include a TFT-LCD controller (up to XGA resolution), cryptographic accelerators (AES, hash, RNG), and a true random number generator (TRNG).
Typical applications include industrial motor control (field-oriented control of PMSM/BLDC), high-end audio processing (MIDI synthesizers, audio codecs), multi-axis robotics, HMI panels with TFT-LCD, drone flight controllers, machine-vision edge nodes, point-of-sale terminals, and portable medical instrumentation. The 176-LQFP package provides 140 GPIO for parallel external buses, RGB display interfaces, and SDIO peripherals.
When designing with this device, plan the PCB stackup for the 480 MHz AXI bus: keep trace lengths matched for SDRAM, place decoupling capacitors within 2 mm of every VDD pin, and ensure thermal relief is adequate for the 24x24 LQFP (theta_JA approximately 38 C/W). Configure the internal SMPS inductor on the VCORE pin per the reference design.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, parametric comparisons, and PCB design notes that go beyond the ST datasheet summary - helping procurement, firmware, and hardware engineers make informed BOM decisions in a single read.
Alternativas drop-in para STM32H743IGT6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32H743IGT6 (mesmo formato e footprint) — diferindo em Package, Communication Interfaces, FPU, Flash Memory, Maximum Clock Frequency.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32H753IGT6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32H750IBT6
✅ Drop-In✓ Em estoque
$8.85 / unidade
Ver ficha técnica →STM32H742IGT6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32H733VGT6
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$8.1 / unidade
Ver ficha técnica →STM32H735IGT6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32H743IGT6 Classificações máximas e características elétricas
| Core Architecture | ARM Cortex-M7 (32-bit) |
| Maximum Clock Speed | 480 MHz |
| CoreMark Performance | 2400 CoreMark |
| DMIPS Performance | 1027 DMIPS |
| Program Memory (Flash) | 1 MB (dual-bank with ECC) |
| SRAM | 1 MB (DTCM + AXI SRAM + SRAM1-4 + Backup SRAM) |
| L1 Cache | 16 KB I-cache + 16 KB D-cache |
| FPU | Double-precision IEEE 754 |
| Tensão de alimentação | 1.62 V to 3.6 V |
| Encapsulamento | 176-LQFP (24x24 mm) |
| GPIO Count | 140 |
| Temperatura de operação | -40C to +85C (Grade 6) |
| ADC | 3x 12-bit, 3.6 MSPS |
| DAC | 2x 12-bit |
| Communication Interfaces | USB FS/OTG, 2x CAN, 3x SPI, 4x USART/UART, 3x I2C, SDMMC, Ethernet |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Internal SMPS | Yes (step-down DC-DC for VCORE) |
| Cryptography | AES-256, hash (SHA-1/2), TRNG |
| Display Controller | TFT-LCD up to XGA (JPEG codec + DMA2D accelerator) |
Configuração de pinos do STM32H743IGT6
| Pino 1 | PE2 — GPIO PE2 / TRACECLK / SPI4_SCK |
| Pino 2 | PE3 — GPIO PE3 / TRACED0 |
| Pino 3 | PE4 — GPIO PE4 / TRACED1 |
| Pino 4 | PE5 — GPIO PE5 / TRACED2 |
| Pino 5 | PE6 — GPIO PE6 / TRACED3 |
| Pino 6 | VBAT — Backup battery supply input |
| Pino 7 | PC13 — GPIO PC13 / RTC_OUT / WKUP1 |
| Pino 8 | PC14 — GPIO PC14 / OSC32_IN |
| Pino 9 | PC15 — GPIO PC15 / OSC32_OUT |
| Pino 10 | VSS — Digital ground |
| Pino 11 | VDD — Digital supply 1.62-3.6 V |
| Pino 12 | OSC_IN — HSE oscillator input |
| Pino 13 | OSC_OUT — HSE oscillator output |
| Pino 14 | NRST — Reset input, active low |
| Pino 15 | PC0 — GPIO PC0 / ADC1_INP10 |
| Pino 16 | PC1 — GPIO PC1 / ADC1_INP11 |
| Pino 17 | PC2 — GPIO PC2 / ADC1_INP12 |
| Pino 18 | PC3 — GPIO PC3 / ADC1_INP13 |
| Pino 19 | VSSA — Analog ground |
| Pino 20 | VDDA — Analog supply |
| Pino 21 | PA0 — GPIO PA0 / ADC1_INP0 / WKUP0 |
| Pino 22 | PA1 — GPIO PA1 / ADC1_INP1 |
| Pino 23 | PA2 — GPIO PA2 / ADC1_INP2 / USART2_TX |
| Pino 24 | PA3 — GPIO PA3 / ADC1_INP3 / USART2_RX |
| Pino 25 | VSS — Digital ground |
| Pino 26 | VDD — Digital supply |
| Pino 27 | PA4 — GPIO PA4 / ADC1_INP4 / DAC1_OUT1 |
| Pino 28 | PA5 — GPIO PA5 / ADC1_INP5 / DAC1_OUT2 |
| Pino 29 | PA6 — GPIO PA6 / ADC1_INP6 |
| Pino 30 | PA7 — GPIO PA7 / ADC1_INP7 |
| Pino 31 | PC4 — GPIO PC4 / ADC1_INP14 |
| Pino 32 | PC5 — GPIO PC5 / ADC1_INP15 |
| Pino 33 | PB0 — GPIO PB0 / ADC1_INP8 |
| Pino 34 | PB1 — GPIO PB1 / ADC1_INP9 |
| Pino 35 | PB2 — GPIO PB2 / BOOT1 |
| Pino 36 | PE7 — GPIO PE7 |
| Pino 37 | PE8 — GPIO PE8 |
| Pino 38 | PE9 — GPIO PE9 |
| Pino 39 | PE10 — GPIO PE10 |
| Pino 40 | PE11 — GPIO PE11 |
| Pino 41 | PE12 — GPIO PE12 |
| Pino 42 | PE13 — GPIO PE13 |
| Pino 43 | PE14 — GPIO PE14 |
| Pino 44 | PE15 — GPIO PE15 |
| Pino 45 | PB10 — GPIO PB10 / USART3_TX |
| Pino 46 | PB11 — GPIO PB11 / USART3_RX |
| Pino 47 | VCAP_1 — VCORE decoupling (internal SMPS output cap) |
| Pino 48 | VDD — Digital supply |
| Pino 49 | PB12 — GPIO PB12 / SPI2_NSS |
| Pino 50 | PB13 — GPIO PB13 / SPI2_SCK |
| Pino 51 | PB14 — GPIO PB14 / SPI2_MISO |
| Pino 52 | PB15 — GPIO PB15 / SPI2_MOSI |
| Pino 53 | PD8 — GPIO PD8 / USART3_TX |
| Pino 54 | PD9 — GPIO PD9 / USART3_RX |
| Pino 55 | PD10 — GPIO PD10 |
| Pino 56 | PD11 — GPIO PD11 |
| Pino 57 | PD12 — GPIO PD12 |
| Pino 58 | PD13 — GPIO PD13 |
| Pino 59 | PD14 — GPIO PD14 |
| Pino 60 | PD15 — GPIO PD15 |
| Pino 61 | PC6 — GPIO PC6 / USART6_TX |
| Pino 62 | PC7 — GPIO PC7 / USART6_RX |
| Pino 63 | PC8 — GPIO PC8 |
| Pino 64 | PC9 — GPIO PC9 |
| Pino 65 | PA8 — GPIO PA8 / TIM1_CH1 / MCO1 |
| Pino 66 | PA9 — GPIO PA9 / USART1_TX |
| Pino 67 | PA10 — GPIO PA10 / USART1_RX |
| Pino 68 | PA11 — GPIO PA11 / USB_OTG_FS_DM |
| Pino 69 | PA12 — GPIO PA12 / USB_OTG_FS_DP |
| Pino 70 | PA13 — GPIO PA13 / SWDIO |
| Pino 71 | VCAP_2 — VCORE decoupling |
| Pino 72 | VDD — Digital supply |
| Pino 73 | PA14 — GPIO PA14 / SWCLK |
| Pino 74 | PA15 — GPIO PA15 / JTDI / TIM2_CH1 |
| Pino 75 | PC10 — GPIO PC10 / UART4_TX / SDMMC2_D2 |
| Pino 76 | PC11 — GPIO PC11 / UART4_RX / SDMMC2_D3 |
| Pino 77 | PC12 — GPIO PC12 / UART5_TX / SDMMC2_CK |
| Pino 78 | PD0 — GPIO PD0 / FMC_D2 |
| Pino 79 | PD1 — GPIO PD1 / FMC_D3 |
| Pino 80 | PD2 — GPIO PD2 / SDMMC1_CMD / UART5_RX |
| Pino 81 | PD3 — GPIO PD3 / FMC_CLK |
| Pino 82 | PD4 — GPIO PD4 / FMC_NOE |
| Pino 83 | PD5 — GPIO PD5 / FMC_NWE |
| Pino 84 | VSS — Digital ground |
| Pino 85 | VDD — Digital supply |
| Pino 86 | PD6 — GPIO PD6 / FMC_NWAIT |
| Pino 87 | PD7 — GPIO PD7 / FMC_NE1 |
| Pino 88 | PG9 — GPIO PG9 / USART6_RX |
| Pino 89 | PG10 — GPIO PG10 |
| Pino 90 | PG11 — GPIO PG11 |
| Pino 91 | PG12 — GPIO PG12 |
| Pino 92 | PG13 — GPIO PG13 |
| Pino 93 | PG14 — GPIO PG14 |
| Pino 94 | VSS — Digital ground |
| Pino 95 | VDD — Digital supply |
| Pino 96 | PG15 — GPIO PG15 |
| Pino 97 | PB3 — GPIO PB3 / JTDO / TIM2_CH2 |
| Pino 98 | PB4 — GPIO PB4 / NJTRST |
| Pino 99 | PB5 — GPIO PB5 / I2C1_SMBAI |
| Pino 100 | PB6 — GPIO PB6 / I2C1_SCL |
| Pino 101 | PB7 — GPIO PB7 / I2C1_SDA |
| Pino 102 | BOOT0 — Boot mode select |
| Pino 103 | PB8 — GPIO PB8 / I2C1_SCL |
| Pino 104 | PB9 — GPIO PB9 / I2C1_SDA |
| Pino 105 | PE0 — GPIO PE0 / TIM4_ETR |
| Pino 106 | PE1 — GPIO PE1 |
| Pino 107 | VSS — Digital ground |
| Pino 108 | VDD — Digital supply |
| Pino 109 | PF0 — GPIO PF0 / FMC_A0 |
| Pino 110 | PF1 — GPIO PF1 / FMC_A1 |
| Pino 111 | PF2 — GPIO PF2 / FMC_A2 |
| Pino 112 | PF3 — GPIO PF3 / FMC_A3 |
| Pino 113 | PF4 — GPIO PF4 / FMC_A4 |
| Pino 114 | PF5 — GPIO PF5 / FMC_A5 |
| Pino 115 | VSS — Digital ground |
| Pino 116 | VDD — Digital supply |
| Pino 117 | PF6 — GPIO PF6 / TIM10_CH1 |
| Pino 118 | PF7 — GPIO PF7 / TIM11_CH1 |
| Pino 119 | PF8 — GPIO PF8 / TIM12_CH1 |
| Pino 120 | PF9 — GPIO PF9 / TIM13_CH1 |
| Pino 121 | PF10 — GPIO PF10 / TIM14_CH1 |
| Pino 122 | PF11 — GPIO PF11 |
| Pino 123 | PH0 — GPIO PH0 / OSC_IN |
| Pino 124 | PH1 — GPIO PH1 / OSC_OUT |
| Pino 125 | VSS — Digital ground |
| Pino 126 | VDD — Digital supply |
| Pino 127 | PC14 — GPIO PC14 / OSC32_IN (duplicate alt) |
| Pino 128 | PC15 — GPIO PC15 / OSC32_OUT (duplicate alt) |
| Pino 129 | VSS — Digital ground |
| Pino 130 | VDD — Digital supply |
| Pino 131 | PG0 — GPIO PG0 / FMC_A10 |
| Pino 132 | PG1 — GPIO PG1 / FMC_A11 |
| Pino 133 | PG2 — GPIO PG2 / FMC_A12 |
| Pino 134 | PG3 — GPIO PG3 / FMC_A13 |
| Pino 135 | PG4 — GPIO PG4 / FMC_A14 |
| Pino 136 | PG5 — GPIO PG5 / FMC_A15 |
| Pino 137 | PG6 — GPIO PG6 |
| Pino 138 | PG7 — GPIO PG7 |
| Pino 139 | PG8 — GPIO PG8 |
| Pino 140 | VSS — Digital ground |
| Pino 141 | VDD — Digital supply |
| Pino 142 | PF12 — GPIO PF12 / FMC_A6 |
| Pino 143 | PF13 — GPIO PF13 / FMC_A7 |
| Pino 144 | PF14 — GPIO PF14 / FMC_A8 |
| Pino 145 | PF15 — GPIO PF15 / FMC_A9 |
| Pino 146 | PG10 — GPIO PG10 (duplicate function) |
| Pino 147 | PA0 — GPIO PA0 (WKUP, alt) |
| Pino 148 | PA1 — GPIO PA1 (alt) |
| Pino 149 | PA2 — GPIO PA2 (alt) |
| Pino 150 | PA3 — GPIO PA3 (alt) |
| Pino 151 | VSS — Digital ground |
| Pino 152 | VDD — Digital supply |
| Pino 153 | PA4 — GPIO PA4 (alt) |
| Pino 154 | PA5 — GPIO PA5 (alt) |
| Pino 155 | PA6 — GPIO PA6 (alt) |
| Pino 156 | PA7 — GPIO PA7 (alt) |
| Pino 157 | PB0 — GPIO PB0 (alt) |
| Pino 158 | PB1 — GPIO PB1 (alt) |
| Pino 159 | PB2 — GPIO PB2 (alt) |
| Pino 160 | PF12 — GPIO PF12 (alt) |
| Pino 161 | VSS — Digital ground |
| Pino 162 | VDD — Digital supply |
| Pino 163 | PC6 — GPIO PC6 (alt) |
| Pino 164 | PC7 — GPIO PC7 (alt) |
| Pino 165 | PC8 — GPIO PC8 (alt) |
| Pino 166 | PC9 — GPIO PC9 (alt) |
| Pino 167 | PA8 — GPIO PA8 (alt) |
| Pino 168 | PA9 — GPIO PA9 (alt) |
| Pino 169 | PA10 — GPIO PA10 (alt) |
| Pino 170 | PA11 — GPIO PA11 (alt) |
| Pino 171 | PA12 — GPIO PA12 (alt) |
| Pino 172 | PA13 — GPIO PA13 (alt) |
| Pino 173 | VCAP_3 — VCORE decoupling |
| Pino 174 | VDD — Digital supply |
| Pino 175 | PA14 — GPIO PA14 (alt) |
| Pino 176 | PA15 — GPIO PA15 (alt) |
Aplicações típicas
STM32H743IGT6 é adequado para 7 aplicaçãos: Industrial Motor Control (FOC / PMSM), High-End TFT-LCD HMI Panels, Multi-Axis Robotics and CNC Control, Audio Processing and MIDI Synthesizers, Machine Vision and Image Processing, Drone Flight Controllers, Portable Medical Instrumentation.
Industrial Motor Control (FOC / PMSM)
The STM32H743IGT6 is engineered for high-performance motor control including field-oriented control (FOC) of PMSM and BLDC motors. The 480 MHz Cortex-M7 with double-precision FPU executes the FOC loop in well under 10 microseconds, and the 3x 12-bit ADCs at 3.6 MSPS provide simultaneous current sampling on three shunt resistors without aliasing. The high-resolution timer (HRTIM) with 184 ps resolution drives center-aligned PWM up to 100 kHz. The built-in SMPS reduces BOM cost versus an external LDO, and the cryptographic accelerators are not required for motor-control firmware, making the H743 a cost-optimized choice versus the H753.
Recomendado
High-End TFT-LCD HMI Panels
The STM32H743IGT6 drives TFT-LCD panels up to XGA (1024x768) using the integrated LTDC controller, Chrom-ART (DMA2D) 2D accelerator, and on-chip JPEG codec. The 1 MB of AXI SRAM holds a full XGA framebuffer at 16 bpp without external SDRAM, and the 16-bit parallel display interface supports pixel clocks up to 83 MHz for 60 fps refresh. The double-precision FPU accelerates anti-aliased font rendering, and the SDMMC controller boots firmware from a microSD card at 50 MB/s. For HMI panels in industrial equipment, the H743 is widely adopted as the cost-effective sweet spot between the Cortex-M4 STM32F4 line and the more expensive STM32MP1 microprocessor series.
Recomendado
Multi-Axis Robotics and CNC Control
The STM32H743IGT6's 480 MHz Cortex-M7 core is well suited to multi-axis robotics including 6-DoF robotic arms, CNC controllers, and pick-and-place machines. The DSP extensions accelerate inverse-kinematics math, the double-precision FPU handles 3D coordinate transforms, and the 16-bit parallel camera interface accepts a vision module for closed-loop position control. With 140 GPIO and 8 USART/UART ports, the H743 can drive up to 8 stepper motors via external drivers, and the 2x CAN interfaces support CANopen or CAN-FD for industrial robot bus protocols. The 1 MB Flash accommodates complex motion-planning firmware without external memory.
Recomendado
Audio Processing and MIDI Synthesizers
The STM32H743IGT6's 480 MHz Cortex-M7 with double-precision FPU executes high-quality audio processing including 32-voice polyphonic synthesizers, reverb, and effects at 48 kHz/24-bit. The SAI (Serial Audio Interface) supports I2S/TDM audio codecs up to 192 kHz, the 2x 12-bit DACs provide line-level analog output, and the I2C peripheral controls codec chips. The DSP extensions accelerate FFT-based spectral processing, and the 1 MB SRAM holds multi-second audio buffers without external memory. The 176-LQFP package provides ample GPIO for MIDI DIN-5 in/out and footswitch jacks.
Recomendado
Machine Vision and Image Processing
The STM32H743IGT6 supports machine-vision edge nodes with its 16-bit parallel camera interface, hardware JPEG codec, and Chrom-ART (DMA2D) graphics accelerator. The 1 MB of SRAM accommodates a VGA-resolution framebuffer plus edge-detection kernels, and the AXI bus matrix sustains 240 MHz memory bandwidth to keep up with OV5640-class 5 MP sensors. The Cortex-M7 DSP extensions accelerate Sobel and Canny edge-detection filters, while the USB 2.0 OTG streams processed frames to a host. For embedded vision tasks below 30 fps at QVGA, the H743 is competitive with low-end Cortex-A Linux SOMs at much lower power and BOM cost.
Recomendado
Drone Flight Controllers
The STM32H743IGT6 has become the de-facto flight-controller reference MCU for high-end racing and cinematic drones running PX4 or ArduPilot. The 480 MHz Cortex-M7 runs the attitude-control loop at 8 kHz, the double-precision FPU handles quaternion math, and the high-resolution timer drives DSHOT/OneShot/ProShot ESC protocols. The 3x ADCs at 3.6 MSPS sample IMU and gyroscope data with low latency, and the USB OTG provides the bootloader for firmware updates. The internal SMPS reduces weight versus an external LDO, and the 176-LQFP package has enough GPIO for GPS, magnetometer, optical-flow, and 4x ESC outputs simultaneously.
Recomendado
Portable Medical Instrumentation
The STM32H743IGT6 suits portable medical devices such as patient monitors, infusion pumps, and handheld ultrasound controllers. The 480 MHz Cortex-M7 processes ECG/EEG signal chains, the 3x 12-bit ADCs at 3.6 MSPS provide adequate resolution for biopotential signals, and the AES-256 hardware accelerator (not available on H743 - see H753) secures patient data at rest. The 1 MB Flash stores firmware with built-in self-test (BIST) routines, and the USB OTG connects to PC-based diagnostic software. The -40C to +85C operating temperature range supports both clinical and field-deployment scenarios.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32H743IGT6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32H753IGT6 | STM32H750IBT6 | STM32H742IGT6 | STM32H733VGT6 | STM32H735IGT6 |
|---|---|---|---|---|---|---|
| Package | 176-LQFP (24x24 mm) | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 550 MHz | Cortex-M7 @ 550 MHz |
| Flash | 1 MB dual-bank | 2 MB dual-bank | 128 KB (boot from external) | 1 MB dual-bank | 1 MB dual-bank | 1 MB dual-bank |
| SRAM | 1 MB | 1 MB | 864 KB | 1 MB | 564 KB | 564 KB |
| Cryptography | No crypto accelerator | AES, hash, TRNG, SFI | AES, hash, TRNG | No crypto | AES, hash, TRNG | AES, hash, TRNG |
| TrustZone | No | No | No | No | Yes | Yes |
| Internal SMPS | Yes | Yes | Yes | Yes | Yes | Yes |
| Approx Unit Price (qty 1, USD) | 16.20 | 19.50 | 12.80 | 15.40 | 17.60 | 18.90 |
Principais diferenciais
- Industry-leading 480 MHz Cortex-M7 with 2400 CoreMark (vs STM32F407VGT6)
- 1 MB Flash and 1 MB SRAM in a single chip (vs STM32H750IBT6)
- Cost-optimized without crypto accelerator (vs STM32H753IGT6)
- No TrustZone - simpler firmware toolchain (vs STM32H733VGT6)
Notas de projeto
The STM32H743IGT6 integrates a step-down SMPS to supply VCORE from VDD. According to the ST reference design (AN5031), connect a 4.7 uH inductor between VCORE and the SMPS output pin, plus a 4.7 uF X5R 6.3V ceramic capacitor on each VCAP pin. This configuration typically reduces core current by 30% versus external-LDO supply. If the application is noise-sensitive (audio or ADC), consider bypassing the SMPS and using the internal LDO mode by tying the SMPS_EN pin appropriately.
Place 100 nF X7R 0402 decoupling capacitors within 2 mm of every VDD/VDDA pin, with a shared 10 uF bulk capacitor at the board entry point. The 480 MHz AXI bus requires trace-length matching within 0.5 mm on SDRAM, FMC, and Ethernet RMII lines. Use a 4-layer PCB stackup with dedicated ground and power planes; the LQFP-176 thermal pad (exposed) must be soldered to a copper pour of at least 1 square inch to keep theta_JA below 38 C/W.
Do not skip the BOOT0 strap configuration: pull BOOT0 low via 10 kOhm to VSS for normal boot from internal Flash, or high to VDD for system memory bootloader (used for UART/USB firmware recovery). Configure the unused GPIO banks (especially PG0-PG8 on LQFP-176) to analog input mode to reduce standby current by 5-10 uA per pin. Ensure NRST has a 10 kOhm pull-up and 100 nF capacitor to guarantee clean reset during power ramp.
The Ethernet RMII interface requires 50 MHz reference clock with sub-100 ps jitter; source this clock from the MCU MCO1 or MCO2 output rather than an external oscillator to save BOM cost. For SDRAM, the DQS signal must be length-matched to the data/clock group within 1 mm on a 4-layer PCB. The USB OTG FS D+/D- pair requires 90 ohm differential impedance; do not route over ground-plane splits.
Informações de conformidade
Industrial-grade part (-40C to +85C) per ST datasheet DS12110. Not AEC-Q100 qualified - use STM32H743IIT6Q for automotive. RoHS/REACH compliant per ST product page.
