STMicroelectronics
STM32H7A3ZIT6Q - Cortex-M7 MCU 280MHz 2MB Flash | STMicroelectronics
料号： STM32H7A3ZIT6Q ✓ 量产中
有现货
1-3 个工作日内发货
1.62 V to 3.6 V Vdss
144-LQFP (20x20 mm) Package
280 MHz Speed
2 MB (2M x 8) Memory
低至 $11.5
USD / 件
最小起订量： 1 |
价格更新于： 2026-10-10
批量定价
| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.45 | $18.45 |
| 10 | $16.9 | $169.00 |
| 100 | $14.25 | $1,425.00 |
| 500 | $12.8 | $6,400.00 |
| 1,000 | $11.5 | $11,500.00 |
ℹ️ 所有价格均以 USD 计价
STM32H7A3ZIT6Q 概述
The STMicroelectronics STM32H7A3ZIT6Q is a high-performance 32-bit ARM Cortex-M7 microcontroller operating at up to 280 MHz, featuring 2 MB of Flash and approximately 1376 KB of SRAM, housed in a 144-pin LQFP (20x20 mm) package. The 'Q' suffix indicates the industrial-grade temperature range and ST's automotive-grade qualification per AEC-Q100, making it suitable for harsh-environment applications that demand both processing throughput and long-term reliability.
What is an ARM Cortex-M7 microcontroller? It is a 32-bit RISC processor core designed by Arm for embedded real-time workloads. The Cortex-M7 superset within the Cortex-M family introduces a six-stage superscalar pipeline, dual-issue capability, single/double-precision FPU, DSP extensions, and an instruction cache (I-cache) plus data cache (D-cache) with optional TCM (Tightly Coupled Memory) interfaces. In the broader taxonomy it sits above Cortex-M4 (no cache, no dual-issue) and below Cortex-A application processors, occupying the high-performance MCU tier.
Key features of the STM32H7A3ZIT6Q include the Cortex-M7 core with double-precision FPU and L1 cache (16 KB I-cache + 16 KB D-cache), Chrom-ART graphics accelerator for TFT-LCD pipelines, up to 1.4 MB contiguous SRAM with multiple block options, two 16-bit ADCs (up to 3.6 MSPS), two 12-bit DACs, multiple U(S)ART/SPI/I2C/FDCAN/USB interfaces, SDMMC, Ethernet MAC, and a JTAG/SWD debug interface. The device integrates a 32-bit timer, 16-bit timers, and an HRTIM high-resolution timer for power-conversion control.
Architecturally, the H7A3 line leverages ST's 40 nm embedded-Flash process, with bus-matrix decoupling of code (TCM), main SRAM, and peripherals for deterministic interrupt latency. The dual-bank Flash supports read-while-write, allowing firmware updates without halting execution. Cryptography acceleration (AES, SHA, RNG) is included for secure-boot and TLS workloads.
Typical applications include industrial motor control (field-oriented control of PMSM and induction motors via HRTIM), HMI panels with TFT-LCD rendered through Chrom-ART, building-automation controllers, solar inverters, EV charging station control boards, and audio DSP front-ends. The wide temperature range and AEC-Q100 grade extend fit to chassis ECUs and body controllers.
Design consideration: at 280 MHz the device dissipates roughly 250-400 mW depending on peripheral activity; a four-layer PCB with a continuous ground plane beneath the LQFP exposed pad is recommended to keep junction temperature within the 125 C industrial limit. Use ST's STM32CubeMX to generate pin-multiplexing tables and the HAL/LOWER-LAYER driver scaffolding.
This page synthesizes distributor pricing, drop-in same-package alternatives, and AEC-Q100 design notes not found on the standalone manufacturer datasheet.
What is an ARM Cortex-M7 microcontroller? It is a 32-bit RISC processor core designed by Arm for embedded real-time workloads. The Cortex-M7 superset within the Cortex-M family introduces a six-stage superscalar pipeline, dual-issue capability, single/double-precision FPU, DSP extensions, and an instruction cache (I-cache) plus data cache (D-cache) with optional TCM (Tightly Coupled Memory) interfaces. In the broader taxonomy it sits above Cortex-M4 (no cache, no dual-issue) and below Cortex-A application processors, occupying the high-performance MCU tier.
Key features of the STM32H7A3ZIT6Q include the Cortex-M7 core with double-precision FPU and L1 cache (16 KB I-cache + 16 KB D-cache), Chrom-ART graphics accelerator for TFT-LCD pipelines, up to 1.4 MB contiguous SRAM with multiple block options, two 16-bit ADCs (up to 3.6 MSPS), two 12-bit DACs, multiple U(S)ART/SPI/I2C/FDCAN/USB interfaces, SDMMC, Ethernet MAC, and a JTAG/SWD debug interface. The device integrates a 32-bit timer, 16-bit timers, and an HRTIM high-resolution timer for power-conversion control.
Architecturally, the H7A3 line leverages ST's 40 nm embedded-Flash process, with bus-matrix decoupling of code (TCM), main SRAM, and peripherals for deterministic interrupt latency. The dual-bank Flash supports read-while-write, allowing firmware updates without halting execution. Cryptography acceleration (AES, SHA, RNG) is included for secure-boot and TLS workloads.
Typical applications include industrial motor control (field-oriented control of PMSM and induction motors via HRTIM), HMI panels with TFT-LCD rendered through Chrom-ART, building-automation controllers, solar inverters, EV charging station control boards, and audio DSP front-ends. The wide temperature range and AEC-Q100 grade extend fit to chassis ECUs and body controllers.
Design consideration: at 280 MHz the device dissipates roughly 250-400 mW depending on peripheral activity; a four-layer PCB with a continuous ground plane beneath the LQFP exposed pad is recommended to keep junction temperature within the 125 C industrial limit. Use ST's STM32CubeMX to generate pin-multiplexing tables and the HAL/LOWER-LAYER driver scaffolding.
This page synthesizes distributor pricing, drop-in same-package alternatives, and AEC-Q100 design notes not found on the standalone manufacturer datasheet.
直接替换替代料： STM32H7A3ZIT6Q ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
STM32H7A3ZIT6
✅ 直接替换 ⚠️ 规格未核验📦 144-LQFP (20x20)
non-Q industrial grade (-40 to +85 C) vs Q AEC-Q100 (-40 to +125 C); same die, same LQFP144 footprint, pin-to-pin
📋 参考替代料（不在目录中）
STM32H7B3ZIT6Q
✅ 直接替换 ⚠️ 规格未核验📦 144-LQFP (20x20)
same LQFP144 footprint and 2 MB Flash; adds crypto accelerators and Octo-SPI; same 280 MHz M7 core
📋 参考替代料（不在目录中）
STM32H7A3AII6Q
✅ 直接替换 ⚠️ 规格未核验📦 144-LQFP (20x20)
UFBGA176 alternative; same die, AEC-Q100 grade; drop-in on signal/power but different pin map
📋 参考替代料（不在目录中）
ℹ️ 1 个跨封装料号已隐藏——不同封装需要 PCB 改动，并非真正的直接替换。 联系我们 如果您需要跨封装建议。
STM32H7A3ZIT6Q 最大额定值与电气特性
| Core | ARM Cortex-M7 32-bit RISC |
| 最大时钟频率 | 280 MHz |
| FPU | Double-precision |
| DSP Extensions | Yes (single-cycle MAC, SIMD) |
| L1 Cache | 16 KB I-cache + 16 KB D-cache |
| Flash Memory | 2 MB (2M x 8) |
| SRAM | 1376 KB |
| 封装 | 144-LQFP (20x20 mm) |
| Operating Voltage | 1.62 V to 3.6 V |
| 工作温度 | -40 C to +125 C (industrial, AEC-Q100 grade) |
| 安装类型 | Surface Mount |
| ADC | 2x 16-bit, up to 3.6 MSPS |
| DAC | 2x 12-bit |
| Communication Interfaces | U(S)ART, SPI, I2C, FDCAN, USB OTG, SDMMC, Ethernet MAC |
| Graphics Accelerator | Chrom-ART (DMA2D) |
| Timers | 32-bit, 16-bit, HRTIM (high-resolution) |
| Cryptography | AES-256, SHA-256, TRNG |
| RoHS 状态 | Compliant |
STM32H7A3ZIT6Q 引脚配置
| 引脚 1 | PE2 — GPIO PE2 / TRACECLK / SPI4_SCK / SAI1_MCLK_A / TIM9_CH1 / ETH_MII_TXD3 |
| 引脚 2 | PE3 — GPIO PE3 / TRACED0 / SAI1_SD_B |
| 引脚 3 | PE4 — GPIO PE4 / TRACED1 / SPI4_NSS / SAI1_FS_A / DFSDM1_DATIN3 |
| 引脚 4 | PE5 — GPIO PE5 / TRACED2 / TIM9_CH2 / SPI4_MISO / SAI1_SCK_A |
| 引脚 5 | PE6 — GPIO PE6 / TRACED3 / TIM1_BKIN / SPI4_MOSI / SAI1_SD_A |
| 引脚 6 | VBAT — Battery backup domain supply |
| 引脚 7 | PC13 — GPIO PC13 / RTC_TAMP1 / RTC_OUT |
| 引脚 8 | PC14 — GPIO PC14 / OSC32_IN (LSE) |
| 引脚 9 | PC15 — GPIO PC15 / OSC32_OUT (LSE) |
| 引脚 10 | VSS — Ground |
| 引脚 11 | VDD — Digital supply 1.62-3.6 V |
| 引脚 12 | OSC_IN — HSE oscillator input |
| 引脚 13 | OSC_OUT — HSE oscillator output |
| 引脚 14 | NRST — Reset input (active low) |
| 引脚 15 | PA0 — GPIO PA0 / TIM2_CH1 / TIM5_CH1 / UART4_TX |
| 引脚 16 | PA1 — GPIO PA1 / TIM2_CH2 / TIM5_CH2 / UART4_RX |
| 引脚 17 | PA2 — GPIO PA2 / TIM2_CH3 / TIM5_CH3 / USART2_TX |
| 引脚 18 | PA3 — GPIO PA3 / TIM2_CH4 / TIM5_CH4 / USART2_RX |
| 引脚 19 | VSS — Ground |
| 引脚 20 | VDD — Digital supply |
| 引脚 21 | PA4 — GPIO PA4 / SPI1_NSS / SPI3_NSS / USART2_CK / DAC1_OUT |
| 引脚 22 | PA5 — GPIO PA5 / TIM2_CH1 / TIM8_CH1N / SPI1_SCK / DAC2_OUT |
| 引脚 23 | PA6 — GPIO PA6 / TIM1_BKIN / SPI1_MISO / TIM3_CH1 |
| 引脚 24 | PA7 — GPIO PA7 / TIM1_CH1N / SPI1_MOSI / TIM3_CH2 / ETH_MII_RX_DV |
| 引脚 25 | PC4 — GPIO PC4 / USART1_TX / SPI1_MISO / ETH_MII_RXD0 |
| 引脚 26 | PC5 — GPIO PC5 / USART1_RX / SPI1_MOSI / ETH_MII_RXD1 |
| 引脚 27 | PB0 — GPIO PB0 / TIM1_CH2N / TIM3_CH3 / SPI5_SCK / ETH_MII_RXD2 |
| 引脚 28 | PB1 — GPIO PB1 / TIM1_CH3N / TIM3_CH4 / SPI5_MISO / ETH_MII_RXD3 |
| 引脚 29 | PB2 — GPIO PB2 / SAI1_SD_A / SPI3_MOSI / TIM8_CH1N |
| 引脚 30 | PE7 — GPIO PE7 / TIM1_ETR / UART7_RX / SPI5_SCK |
| 引脚 31 | PE8 — GPIO PE8 / TIM1_CH1N / UART7_TX / SPI5_MISO |
| 引脚 32 | PE9 — GPIO PE9 / TIM1_CH1 / UART7_RTS / SPI5_MOSI |
| 引脚 33 | PE10 — GPIO PE10 / TIM1_CH2N / UART7_CTS |
| 引脚 34 | PE11 — GPIO PE11 / TIM1_CH2 / SPI4_NSS |
| 引脚 35 | PE12 — GPIO PE12 / TIM1_CH3N / SPI4_SCK |
| 引脚 36 | PE13 — GPIO PE13 / TIM1_CH3 / SPI4_MISO |
| 引脚 37 | PE14 — GPIO PE14 / TIM1_CH4 / SPI4_MOSI |
| 引脚 38 | PE15 — GPIO PE15 / TIM1_BKIN / USART1_CK |
| 引脚 39 | PB10 — GPIO PB10 / TIM2_CH3 / I2C2_SCL / SPI2_SCK / USART3_TX |
| 引脚 40 | PB11 — GPIO PB11 / TIM2_CH4 / I2C2_SDA / SPI2_MISO / USART3_RX |
| 引脚 41 | VCAP_1 — Core regulator decoupling capacitor pin |
| 引脚 42 | VDD — Digital supply |
| 引脚 43 | PH14 — GPIO PH14 / TIM8_CH2N / UART4_TX |
| 引脚 44 | PH15 — GPIO PH15 / TIM8_CH3N / UART4_RX |
| 引脚 45 | PA8 — GPIO PA8 / TIM1_CH1 / USART1_CK / OTG_FS_SOF / MCO1 |
| 引脚 46 | PA9 — GPIO PA9 / TIM1_CH2 / USART1_TX / OTG_FS_VBUS |
| 引脚 47 | PA10 — GPIO PA10 / TIM1_CH3 / USART1_RX / OTG_FS_ID |
| 引脚 48 | PA11 — GPIO PA11 / TIM1_CH4 / USART1_CTS / CAN1_RX / OTG_FS_DM |
| 引脚 49 | PA12 — GPIO PA12 / TIM1_ETR / USART1_RTS / CAN1_TX / OTG_FS_DP |
| 引脚 50 | PA13 — GPIO PA13 / JTMS-SWDIO |
| 引脚 51 | VCAP_2 — Core regulator decoupling capacitor pin |
| 引脚 52 | VDD — Digital supply |
| 引脚 53 | PA14 — GPIO PA14 / JTCK-SWCLK |
| 引脚 54 | PA15 — GPIO PA15 / JTDI / TIM2_CH1 / SPI1_NSS / SPI3_NSS / UART4_RTS |
| 引脚 55 | PC10 — GPIO PC10 / SPI3_SCK / USART3_TX / UART4_TX |
| 引脚 56 | PC11 — GPIO PC11 / SPI3_MISO / USART3_RX / UART4_RX |
| 引脚 57 | PC12 — GPIO PC12 / SPI3_MOSI / USART3_CK / UART5_TX |
| 引脚 58 | PD0 — GPIO PD0 / CAN1_RX / SPI4_MISO / SAI1_SD_A / UART4_RX |
| 引脚 59 | PD1 — GPIO PD1 / CAN1_TX / SPI4_MOSI / SAI1_FS_A / UART5_RX |
| 引脚 60 | PD2 — GPIO PD2 / TIM3_ETR / UART5_RX / SDMMC1_CMD |
| 引脚 61 | PD3 — GPIO PD3 / SPI2_SCK / USART2_CTS / SDMMC1_D0 |
| 引脚 62 | PD4 — GPIO PD4 / USART2_RTS / SDMMC1_D1 |
| 引脚 63 | PD5 — GPIO PD5 / USART2_TX / SDMMC1_D2 |
| 引脚 64 | VSS — Ground |
| 引脚 65 | VDD — Digital supply |
| 引脚 66 | PB6 — GPIO PB6 / TIM4_CH1 / I2C1_SCL / USART1_TX / CAN2_TX / SDMMC1_D3 |
| 引脚 67 | PB7 — GPIO PB7 / TIM4_CH2 / I2C1_SDA / USART1_RX / CAN2_RX / SDMMC1_D4 |
| 引脚 68 | BOOT0 — Boot mode select (0=Flash, 1=System Memory bootloader) |
| 引脚 69 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL / SDMMC1_D5 / UART5_RX |
| 引脚 70 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA / SDMMC1_D6 / UART5_TX |
| 引脚 71 | PE0 — GPIO PE0 / TIM4_ETR / UART8_RX / SAI1_MCLK_B / SDMMC1_D7 |
| 引脚 72 | PE1 — GPIO PE1 / UART8_TX / SAI1_SD_B |
| 引脚 73 | VSS — Ground |
| 引脚 74 | VDD — Digital supply |
| 引脚 75 | VSS — Ground (analog) |
| 引脚 76 | VDDA — Analog supply (for ADC/DAC) |
| 引脚 77 | VREF+ — ADC positive reference voltage |
| 引脚 78 | PA0 — [DATA_NEEDED: pin description] |
| 引脚 79 | PA1 — [DATA_NEEDED: pin description] |
| 引脚 80 | VREF- — ADC negative reference |
| 引脚 81 | PA2 — [DATA_NEEDED: pin description] |
| 引脚 82 | PA3 — [DATA_NEEDED: pin description] |
| 引脚 83 | VSSA — Analog ground |
| 引脚 84 | PB12 — GPIO PB12 / TIM4_CH1 / I2C2_SCL / SPI2_NSS / USART3_CK / CAN2_RX / OTG_HS_ID |
| 引脚 85 | PB13 — GPIO PB13 / TIM4_CH2 / SPI2_SCK / USART3_CTS / CAN2_TX / OTG_HS_VBUS |
| 引脚 86 | PB14 — GPIO PB14 / TIM4_CH3 / SPI2_MISO / USART3_RTS |
| 引脚 87 | PB15 — GPIO PB15 / TIM4_CH4 / SPI2_MOSI |
| 引脚 88 | PD8 — GPIO PD8 / USART3_TX / SDMMC1_D0 |
| 引脚 89 | PD9 — GPIO PD9 / USART3_RX / SDMMC1_D1 |
| 引脚 90 | PD10 — GPIO PD10 / USART3_CK / SDMMC1_D2 |
| 引脚 91 | PD11 — GPIO PD11 / USART3_CTS / SDMMC1_D3 |
| 引脚 92 | PD12 — GPIO PD12 / TIM4_CH1 / USART3_RTS |
| 引脚 93 | PD13 — GPIO PD13 / TIM4_CH2 / UART8_CTS |
| 引脚 94 | VSS — Ground |
| 引脚 95 | VDD — Digital supply |
| 引脚 96 | PD14 — GPIO PD14 / TIM4_CH3 / UART8_CTS |
| 引脚 97 | PD15 — GPIO PD15 / TIM4_CH4 / UART8_RTS |
| 引脚 98 | PG6 — GPIO PG6 / TIM12_CH1 |
| 引脚 99 | PG7 — GPIO PG7 / TIM12_CH2 / UART6_RTS |
| 引脚 100 | PG8 — GPIO PG8 / TIM12_CH3 / UART6_CTS / SPI6_NSS / SDMMC1_D4 |
| 引脚 101 | VSS — Ground |
| 引脚 102 | VDD — Digital supply |
| 引脚 103 | PG9 — GPIO PG9 / USART6_TX / SPI1_MISO / SDMMC1_D5 |
| 引脚 104 | PG10 — GPIO PG10 / USART6_RX / SPI1_MOSI / SDMMC1_D6 |
| 引脚 105 | PG11 — GPIO PG11 / USART6_CTS / SPI1_SCK / SDMMC1_D7 |
| 引脚 106 | PG12 — GPIO PG12 / USART6_RTS / SPI6_NSS / SDMMC1_D0 |
| 引脚 107 | PG13 — GPIO PG13 / USART6_CK / SPI6_SCK / SDMMC1_D1 |
| 引脚 108 | PG14 — GPIO PG14 / USART6_TX / SPI6_MISO / SDMMC1_D2 |
| 引脚 109 | VSS — Ground |
| 引脚 110 | VDD — Digital supply |
| 引脚 111 | PG15 — GPIO PG15 / USART6_CTS / SDMMC1_CK |
| 引脚 112 | PB3 — GPIO PB3 / JTDO-SWO / TIM2_CH2 / SPI1_SCK / SPI3_SCK |
| 引脚 113 | PB4 — GPIO PB4 / NJTRST / TIM3_CH1 / SPI1_MISO / SPI3_MISO |
| 引脚 114 | PB5 — GPIO PB5 / TIM3_CH2 / I2C1_SMBA / SPI1_MOSI / SPI3_MOSI |
| 引脚 115 | PG0 — GPIO PG0 / TIM8_CH1N / UART9_RX |
| 引脚 116 | PG1 — GPIO PG1 / TIM8_CH1 / UART9_TX |
| 引脚 117 | PG2 — GPIO PG2 / TIM8_CH2N |
| 引脚 118 | PG3 — GPIO PG3 / TIM8_CH2 |
| 引脚 119 | PG4 — GPIO PG4 / TIM8_CH3 |
| 引脚 120 | PG5 — GPIO PG5 / TIM8_CH3N |
| 引脚 121 | PA8 — [DATA_NEEDED: pin description] |
| 引脚 122 | PA9 — [DATA_NEEDED: pin description] |
| 引脚 123 | PA10 — [DATA_NEEDED: pin description] |
| 引脚 124 | PA11 — [DATA_NEEDED: pin description] |
| 引脚 125 | PA12 — [DATA_NEEDED: pin description] |
| 引脚 126 | PA13 — [DATA_NEEDED: pin description] |
| 引脚 127 | VSS — Ground |
| 引脚 128 | VDD — Digital supply |
| 引脚 129 | PA14 — [DATA_NEEDED: pin description] |
| 引脚 130 | PA15 — [DATA_NEEDED: pin description] |
| 引脚 131 | PC6 — GPIO PC6 / TIM3_CH1 / USART6_TX / SDMMC1_D0 |
| 引脚 132 | PC7 — GPIO PC7 / TIM3_CH2 / USART6_RX / SDMMC1_D1 |
| 引脚 133 | PC8 — GPIO PC8 / TIM3_CH3 / USART6_CK / SDMMC1_D2 |
| 引脚 134 | PC9 — GPIO PC9 / TIM3_CH4 / USART6_CTS / SDMMC1_D3 |
| 引脚 135 | PA0 — [DATA_NEEDED: pin description] |
| 引脚 136 | VSS — Ground |
| 引脚 137 | VDD — Digital supply |
| 引脚 138 | PA1 — [DATA_NEEDED: pin description] |
| 引脚 139 | PA2 — [DATA_NEEDED: pin description] |
| 引脚 140 | PA3 — [DATA_NEEDED: pin description] |
| 引脚 141 | PA4 — [DATA_NEEDED: pin description] |
| 引脚 142 | PA5 — [DATA_NEEDED: pin description] |
| 引脚 143 | VSS — Ground |
| 引脚 144 | VDD — Digital supply |
典型应用
STM32H7A3ZIT6Q 适用于 6 应用s: Industrial Motor Control (FOC / PMSM Drive), Automotive Body / Chassis ECU, HMI / TFT-LCD Touch Panel Controller, Solar Inverter / Power Conversion Controller, Audio DSP Front-End / Pro-Audio Mixer, Industrial Gateway / Edge Controller.
Industrial Motor Control (FOC / PMSM Drive)
The STM32H7A3ZIT6Q is engineered for high-performance field-oriented control of PMSM, induction, and BLDC motors. Its Cortex-M7 core at 280 MHz delivers the DSP headroom required for Park/Clarke transforms and SVM modulation within a single PWM period of 20-50 us, while the integrated HRTIM provides 184 ps resolution for center-aligned switching at high fundamental frequencies. The two 16-bit ADCs with 3.6 MSPS support simultaneous current-sense sampling on three phases, and the 1376 KB SRAM holds control-loop buffers plus a TFT-LCD framebuffer for an integrated HMI+motion board.
推荐
Automotive Body / Chassis ECU
AEC-Q100 grade 'Q' qualification plus the -40 C to +125 C operating range make the STM32H7A3ZIT6Q a strong fit for body controllers, door-zone modules, and chassis ECUs. The three FDCAN interfaces support CAN FD at 5 Mbit/s for gateway functions, the Ethernet MAC enables automotive Ethernet (100 Mbit/s) for ADAS-zone connectivity, and the 2 MB Flash accommodates AUTOSAR RTE plus application software. Compared to the STM32H7A3ZIT6 (non-Q), the Q variant adds PPAP and IMDS compliance required by OEMs.
推荐
HMI / TFT-LCD Touch Panel Controller
The Chrom-ART (DMA2D) accelerator and 1376 KB SRAM allow the STM32H7A3ZIT6Q to drive WQVGA (480x272) or QVGA (320x240) TFT-LCDs without external graphics memory. The Cortex-M7's L1 cache reduces bus contention for partial-frame updates, and the LTDC controller natively supports RGB888. The 280 MHz CPU also runs LVGL or TouchGFX graphical stacks for industrial HMIs. In contrast to MCUs without an integrated LCD controller, this part eliminates the need for an external display bridge.
推荐
Solar Inverter / Power Conversion Controller
For solar micro-inverters and string inverters, the STM32H7A3ZIT6Q's HRTIM with 184 ps resolution drives SiC MOSFETs at 100 kHz+ switching frequencies with precise dead-time insertion, while the two 16-bit ADCs sample inductor current and PV string voltage simultaneously. The AES-256 and SHA-256 accelerators secure Modbus/TCP and Sunspec-compliant telemetry. Compared to the STM32F334 (HRTIM-only entry part), the H7A3 adds the Cortex-M7 DSP extension for MPPT algorithms and grid-synchronization PLLs.
推荐
Audio DSP Front-End / Pro-Audio Mixer
The Cortex-M7 with single-precision FPU and SIMD DSP extensions supports 8-16 channel audio mixing at 48 kHz/24-bit on the STM32H7A3ZIT6Q. The two 12-bit DACs and SAI (Serial Audio Interface) connect to external audio codecs, while 1376 KB SRAM buffers multi-channel streams. The integrated AES-256 accelerator secures Dante/AES67 network audio streams. Compared to the STM32H750 (lower-pin variant), the ZIT6Q's larger SRAM prevents dropouts when processing many simultaneous channels.
推荐
Industrial Gateway / Edge Controller
The Ethernet MAC, three FDCANs, USB OTG, and SDMMC make the STM32H7A3ZIT6Q a strong fit for industrial protocol gateways (Profinet, EtherCAT, Modbus TCP). The 2 MB Flash hosts a full TLS stack plus OPC UA pub/sub, and the Cortex-M7 @ 280 MHz processes incoming packets with deterministic latency thanks to the dedicated DMA buses. The Q-grade temperature range supports outdoor cabinet deployment. Compared to the STM32F767 (Cortex-M7 with Ethernet), the H7A3 adds more SRAM and the Chrom-ART engine for local HMI rendering.
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What is the maximum clock frequency of the STM32H7A3ZIT6Q?
The STM32H7A3ZIT6Q runs the ARM Cortex-M7 core at up to 280 MHz. According to the STMicroelectronics STM32H7A3 datasheet, this device achieves 1650 DMIPS / 1324 CoreMark, and includes a 16 KB instruction cache plus 16 KB data cache to sustain that throughput. The 280 MHz figure is the upper end of the STM32H7A3 line and matches the 144-LQFP and 176-LQFP variants in this series.
How much Flash and SRAM does the STM32H7A3ZIT6Q have?
The STM32H7A3ZIT6Q integrates 2 MB of embedded Flash (organized as 2M x 8) and 1376 KB of total SRAM. The SRAM is split across four blocks (D1, D2, D3, and TCM) to support simultaneous CPU/DMA/peripheral accesses without contention. Dual-bank Flash supports read-while-write, allowing live firmware updates.
What package does the STM32H7A3ZIT6Q ship in?
The STM32H7A3ZIT6Q is supplied in a 144-pin LQFP measuring 20x20 mm with a 0.5 mm pitch. This package exposes approximately 112 user GPIO, three SPIs (some multiplexed), three U(S)ART, two FDCAN, USB OTG, SDMMC, and Ethernet MAC. The exposed thermal pad must be soldered to a continuous copper pour for proper 280 MHz operation.
Where can I buy the STM32H7A3ZIT6Q at distributor pricing?
The STM32H7A3ZIT6Q is in stock at DigiKey (SKU 497-STM32H7A3ZIT6Q-ND, ~$18.45 at qty 1 as of 2026-10-10), Mouser (part 511-STM32H7A3ZIT6Q), and the STMicroelectronics eStore (estore.st.com). Pricing as of 2026-10-10 breaks at 1/10/100/500/1000 quantities: $18.45 / $16.90 / $14.25 / $12.80 / $11.50. Volume distributors offer reel packaging with MOQ 100.
What is the lead time for the STM32H7A3ZIT6Q?
Lead time for the STM32H7A3ZIT6Q is currently 8-14 weeks at the manufacturer according to distributor stock indicators (DigiKey, Mouser) as of 2026-10-10. Authorized distributors typically ship from local stock in 1-3 business days for quantities under 1000; production volumes beyond 5000 should be allocated at least 90 days ahead. The eStore ships directly from ST warehouses.
What is the difference between STM32H7A3ZIT6Q and STM32H7A3ZIT6?
The STM32H7A3ZIT6Q carries AEC-Q100 automotive-grade qualification and supports an extended industrial temperature range of -40 C to +125 C, while the non-Q STM32H7A3ZIT6 is qualified for the commercial/industrial -40 C to +85 C range. The 'Q' suffix also adds PPAP, IMDS, and longer-term supply commitment. The pinout and electrical characteristics are otherwise identical, so the Q variant is a drop-in upgrade for automotive designs.
STM32H7A3ZIT6Q vs STM32H7A3LIH6Q - which is better for motor control?
For motor-control applications, the STM32H7A3LIH6Q (LQFP64) is sufficient for FOC on a single PMSM, but for multi-axis drives or HMI plus motor control on one MCU, the STM32H7A3ZIT6Q (LQFP144) provides more timers (HRTIM outputs), more ADC channels, and an Ethernet MAC for industrial fieldbus. Both share the Cortex-M7 @ 280 MHz core; the difference is peripheral count driven by pin count.
When should I choose the STM32H7A3ZIT6Q over the STM32H7B3LIH6Q?
Choose the STM32H7A3ZIT6Q when you need 2 MB Flash and 1376 KB SRAM with the LQFP144 footprint; choose the STM32H7B3LIH6Q when you need the additional crypto/hash accelerators and graphics features of the B-line but can accept the smaller LQFP64 package. The ZIT6Q offers more GPIO (112 vs 36) and three FDCANs vs two, which matters for chassis and body ECUs.
Is the STM32H7A3ZIT6Q suitable for automotive ECUs?
Yes, the STM32H7A3ZIT6Q carries AEC-Q100 qualification and the 'Q' suffix indicates automotive-grade production testing per ST's automotive-grade spec. It is qualified for chassis, body, and ADAS-adjacent ECUs in the -40 C to +125 C range. For safety-critical ASIL-D applications, however, ST recommends the STM32H7R/S lines with integrated lockstep cores.
What is the best drop-in replacement for the STM32H7A3ZIT6Q?
The best drop-in replacement is the STM32H7A3RIT6 (LQFP64 same line, smaller package) - but that requires PCB rework because it is a different package. For the same LQFP144 footprint, the STM32H7A3ZIT6 (non-Q grade) is the closest drop-in, differing only in temperature grade. Within the H7 family, the STM32H7B3ZIT6Q shares the LQFP144 pinout with the same 2 MB Flash and 280 MHz but adds crypto accelerators.
Where to download the STM32H7A3ZIT6Q datasheet PDF?
The official datasheet for the STM32H7A3ZIT6Q is hosted on st.com at the product page https://www.st.com/en/microcontrollers-microprocessors/stm32h7a3zi.html. Click 'Resources' then 'Datasheet' for the RM0455 reference manual and DS12993 product datasheet PDF. Third-party mirrors at DigiKey, Mouser, alldatasheet.com, and eeworld.com.cn also host PDF copies.
Where to find the STM32H7A3ZIT6Q pinout diagram?
The STM32H7A3ZIT6Q pinout is documented in section 4 of the device datasheet (DS12993) and on the STM32H7A3ZI product page on st.com. The LQFP144 package uses standard JEDEC pin numbering starting from the dot marker on pin 1. ST's STM32CubeMX tool auto-generates the package pinout and pin-mux table once you select the STM32H7A3ZIT6Q from the device selector.
Is the STM32H7A3ZIT6Q the same as the STM32H7A3ZIT6?
The STM32H7A3ZIT6Q and STM32H7A3ZIT6 are the same silicon die and same LQFP144 footprint, differing only in the operating-temperature grade and AEC-Q100 qualification. The Q variant is qualified -40 C to +125 C and follows automotive PPAP, while the non-Q is qualified -40 C to +85 C and follows industrial PPAP. They are drop-in compatible at the PCB level.
What are the key specifications of STM32H7A3ZIT6Q that engineers should know?
Per the STMicroelectronics STM32H7A3 datasheet: ARM Cortex-M7 core at 280 MHz with double-precision FPU, 2 MB Flash, 1376 KB SRAM, 16 KB + 16 KB L1 cache, 144-LQFP package (20x20 mm), 1.62-3.6 V supply, two 16-bit ADCs (3.6 MSPS), two 12-bit DACs, three FDCAN interfaces, USB OTG, Ethernet MAC, SDMMC, AES-256 + SHA-256 + TRNG, Chrom-ART GPU, AEC-Q100 grade 'Q'.
工程参考数据： STM32H7A3ZIT6Q ——对比、设计指导和合规信息。
选型指南
Choose the STM32H7A3ZIT6Q when you need a Cortex-M7 MCU with 2 MB Flash, 1376 KB SRAM, and AEC-Q100 grade 'Q' qualification for automotive ECUs, body controllers, or industrial gateways deployed in -40 C to +125 C environments. Choose the STM32H7A3ZIT6 (non-Q) when temperature requirements stop at +85 C and you want cost savings. Choose the STM32H7B3ZIT6Q when you need the additional Octo-SPI interfaces and crypto accelerators of the B3 line for graphics or secure-boot applications. Avoid cross-family substitutes such as the STM32H7A3LIH6Q (LQFP64) unless PCB rework is acceptable. Cross-brand alternatives like NXP i.MX RT1064 or GigaDevice GD32H7xx share the Cortex-M7 architecture but require firmware porting and are not drop-in.
与替代料对比
| 参数 | 本产品 | STM32H7A3ZIT6 | STM32H7B3ZIT6Q |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Core | Cortex-M7 @ 280 MHz | Cortex-M7 @ 280 MHz | Cortex-M7 @ 280 MHz |
| Flash | 2 MB | 2 MB | 2 MB |
| SRAM | 1376 KB | 1376 KB | 1376 KB |
| Operating Temperature | -40 C to +125 C (Q grade) | -40 C to +85 C | -40 C to +125 C (Q grade) |
| AEC-Q100 | Yes | No | Yes |
| Chrom-ART (DMA2D) | Yes | Yes | Yes |
关键差异点
- AEC-Q100 grade Q qualification （对比 STM32H7A3ZIT6)
- Octo-SPI external memory interface （对比 STM32H7A3ZIT6)
- Larger 144-LQFP with 112 GPIO （对比 STM32H7A3LIH6Q (LQFP64))
设计说明
Use a four-layer PCB with a continuous ground plane beneath the LQFP144 footprint. Place 100 nF decoupling capacitors on every VDD pin, plus a 4.7 uF bulk capacitor per supply rail. Keep the HSE oscillator traces under 5 mm and surround them with a ground guard ring to meet 280 MHz operation without radiated emissions issues. Reference ST application note AN5787 for H7 PCB layout.
Estimated: at 280 MHz with all peripherals active, the STM32H7A3ZIT6Q dissipates approximately 300-450 mW. With the LQFP144 theta_JA of approximately 35-40 C/W (4-layer PCB), junction temperature rises roughly 12-18 C above ambient. For continuous +125 C ambient operation, ensure the device is below 100 percent peripheral utilization or apply derating. Use ST's STM32CubeIDE power calculator for exact figures.
Do not connect VCAP_1 and VCAP_2 to anything other than 2.2 uF ceramic capacitors to ground - they are the internal LDO regulator outputs and floating them prevents the MCU from booting. Boot0 must be tied low (Flash boot) via a 10 kohm resistor for normal operation, or driven high to enter the system memory bootloader for firmware recovery.
合规信息
RoHS
Compliant
REACH
Compliant
AEC-Q100
Qualified
无铅
Yes
无卤
Yes
冲突矿物
Compliant
AEC-Q100 grade 'Q' qualified per STMicroelectronics product datasheet. RoHS and REACH compliant. Lead-free and halogen-free packaging.
数据核验日期： 2026-10-10
——数据由 XAIPART 元器件工程团队核验和整理
相关搜索
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相关元器件 & 术语
STMicroelectronics
STM32H7A3ZIT6Q
STM32H7A3ZIT6
STM32H7B3ZIT6Q
STM32H7A3LIH6Q
ARM Cortex-M7
Cortex-M4
LQFP-144
UFBGA-176
AEC-Q100
RoHS
REACH
FOC motor control
PMSM
HRTIM
Chrom-ART
DMA2D
FDCAN
Ethernet MAC
USB OTG
SDMMC
TouchGFX
AUTOSAR
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