STM32H7A3RIT6 - 280MHz Cortex-M7 MCU, 2MB Flash | STMicroelectronics
Référence : STM32H7A3RIT6 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $16.05 | $16,05 |
| 10 | $14.85 | $148,50 |
| 100 | $13.1 | $1 310,00 |
| 500 | $11.55 | $5 775,00 |
| 1 000 | $10.2 | $10 200,00 |
STM32H7A3RIT6 Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals; the STM32 family is the 32-bit ARM Cortex-M based MCU portfolio from STMicroelectronics, spanning ultra-low-power (L0/L4), mainstream (F0/F1/F3/G0/G4), high-performance (F4/F7/H7), and wireless (WB/WL) lines. The Cortex-M7 core sits at the top of the Cortex-M performance hierarchy, above Cortex-M4/M33, and the H7A3 line further extends the H7 family with larger Flash and a cost-optimized peripheral set.
Key features of the STM32H7A3RIT6 include 2 MB single-bank Flash with ECC, 1376 KB total SRAM (1 MB DTCM + 192 KB SRAM1 + 64 KB SRAM2 + 64 KB SRAM3 + 56 KB SRAM4), extensive connectivity (USB 2.0 FS+OTG, CAN-FD x2, SDMMC x2, USART/UART/SPI/I2C), a 16-bit ADC, two 12-bit DACs, two 32-bit timers, and multiple 16-bit timers. An external memory interface (FMC) and OCTOSPI/Quad-SPI interface allow expansion to external Flash/PSRAM, supporting displays up to XGA resolution.
Typical applications include industrial motor control and factory automation, human-machine interfaces (HMI) with TFT LCD, audio processing with the dedicated SAI interface, IoT gateways, drones/flight controllers, point-of-sale terminals, and high-performance consumer devices. Designers often select the H7A3 line for higher performance than F7/F4 with no need for the dual-core A7 architecture of the H7 family.
When designing with this MCU, ensure the SMPS or external LDO supplies 1.62-3.6 V to VDD with correct power sequencing; D1 and D2 power domains require separate decoupling. Use ST's STM32CubeMX for clock tree, peripheral pinout, and code generation to minimize bring-up time.
Alternatives de remplacement direct pour STM32H7A3RIT6 — 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 STM32H7A3RIT6 (même facteur de forme et même empreinte) — différant par Core, Package, SRAM, ADC, DAC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
STM32H7A3LIT6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32H7A3RIT3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32H7B0RIT6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32H753IIT6
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.45 / unité
Voir la fiche technique →GD32H737VBT6
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32H7A3RIT6 Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M7 32-bit |
| Fréquence d'horloge maximale | 280 MHz |
| Program Memory | 2 MB Flash with ECC |
| SRAM | 1376 KB (1 MB DTCM + 376 KB system SRAM) |
| Operating Voltage | 1.62 V to 3.6 V |
| Boîtier | 64-LQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Supply Voltage (VDD) | 1.62 V to 3.6 V |
| Température de fonctionnement | -40 C to +85 C |
| CoreMark | 2741 |
| DMIPS | 1177 |
| FPU | Double-precision (DP-FPU) |
| L1 Cache | 16 KB I-cache + 16 KB D-cache |
| USB | USB 2.0 FS OTG + USB Type-C PD |
| CAN | 2x CAN-FD (FDCAN) |
| ADC | 16-bit, 3.6 MSPS, up to 20 channels |
| DAC | 2x 12-bit |
| SDMMC | 2x SDMMC |
| OCTOSPI | Yes (1x OCTOSPI / Quad-SPI) |
| Statut RoHS | Compliant |
Configuration des broches de STM32H7A3RIT6
| Broche 1 | PB6 — GPIO/TIM4_CH1/USART1_TX/I2C1_SCL |
| Broche 2 | PB7 — GPIO/TIM4_CH2/USART1_RX/I2C1_SDA |
| Broche 3 | PB8 — GPIO/TIM4_CH3/I2C1_SCL/CAN1_RX |
| Broche 4 | PB9 — GPIO/TIM4_CH4/I2C1_SDA/CAN1_TX |
| Broche 5 | VDD — Digital power supply (3.3V) |
| Broche 6 | VSS — Digital ground |
| Broche 7 | NRST — Reset input (active low) |
| Broche 8 | VREF+ — ADC reference voltage |
| Broche 9 | PA0 — GPIO/ADC1_INP0/TIM2_CH1/OTG_FS_SOF |
| Broche 10 | PA1 — GPIO/ADC1_INP1/TIM2_CH2 |
| Broche 11 | PA2 — GPIO/ADC1_INP2/TIM2_CH3/USART2_TX |
| Broche 12 | PA3 — GPIO/ADC1_INP3/TIM2_CH4/USART2_RX |
| Broche 13 | PA4 — GPIO/ADC1_INP4/DAC1_OUT1/SPI1_NSS |
| Broche 14 | PA5 — GPIO/ADC1_INP5/DAC1_OUT2/SPI1_SCK |
| Broche 15 | PA6 — GPIO/ADC1_INP6/SPI1_MISO/TIM3_CH1 |
| Broche 16 | PA7 — GPIO/ADC1_INP7/SPI1_MOSI/TIM3_CH2 |
| Broche 17 | PB0 — GPIO/ADC1_INP8/TIM3_CH3 |
| Broche 18 | PB1 — GPIO/ADC1_INP9/TIM3_CH4 |
| Broche 19 | VSS — Digital ground |
| Broche 20 | VDD — Digital power supply (3.3V) |
| Broche 21 | PB10 — GPIO/TIM2_CH3/I2C2_SCL/USART3_TX |
| Broche 22 | PB11 — GPIO/TIM2_CH4/I2C2_SDA/USART3_RX |
| Broche 23 | VSS — Digital ground |
| Broche 24 | VDD — Digital power supply (3.3V) |
| Broche 25 | PB12 — GPIO/SPI2_NSS/I2S2_WS/CAN2_RX |
| Broche 26 | PB13 — GPIO/SPI2_SCK/I2S2_CK/CAN2_TX |
| Broche 27 | PB14 — GPIO/SPI2_MISO/TIM12_CH1 |
| Broche 28 | PB15 — GPIO/SPI2_MOSI/TIM12_CH2 |
| Broche 29 | PA8 — GPIO/TIM1_CH1/USART1_CK/OTG_FS_SOF |
| Broche 30 | PA9 — GPIO/TIM1_CH2/USART1_TX |
| Broche 31 | PA10 — GPIO/TIM1_CH3/USART1_RX/OTG_FS_ID |
| Broche 32 | PA11 — GPIO/OTG_FS_DM/CAN1_RX |
| Broche 33 | PA12 — GPIO/OTG_FS_DP/CAN1_TX |
| Broche 34 | PA13 — GPIO/SYS_JTMS-SWDIO |
| Broche 35 | VSS — Digital ground |
| Broche 36 | VDD — Digital power supply (3.3V) |
| Broche 37 | PA14 — GPIO/SYS_JTCK-SWCLK |
| Broche 38 | PA15 — GPIO/SYS_JTDI/TIM2_CH1/SPI1_NSS |
| Broche 39 | PB3 — GPIO/SYS_JTDO-SWO/TIM2_CH2/SPI1_SCK |
| Broche 40 | PB4 — GPIO/SYS_NJTRST/TIM3_CH1/SPI1_MISO |
| Broche 41 | PB5 — GPIO/TIM3_CH2/SPI1_MOSI/I2C1_SMBA |
| Broche 42 | VDD — Digital power supply (3.3V) |
| Broche 43 | VSS — Digital ground |
| Broche 44 | PE0 — GPIO/TIM4_ETR |
| Broche 45 | PE1 — GPIO |
| Broche 46 | VSS — Digital ground |
| Broche 47 | VDD — Digital power supply (3.3V) |
| Broche 48 | PB2 — GPIO/BOOT1 |
| Broche 49 | PE7 — GPIO/TIM1_ETR |
| Broche 50 | PE8 — GPIO/TIM1_CH1N |
| Broche 51 | PE9 — GPIO/TIM1_CH1 |
| Broche 52 | PE10 — GPIO/TIM1_CH2N |
| Broche 53 | PE11 — GPIO/TIM1_CH2 |
| Broche 54 | PE12 — GPIO/TIM1_CH3N |
| Broche 55 | PE13 — GPIO/TIM1_CH3 |
| Broche 56 | PE14 — GPIO/TIM1_CH4 |
| Broche 57 | PE15 — GPIO/TIM1_BKIN |
| Broche 58 | PD0 — GPIO/FMC_D2 |
| Broche 59 | PD1 — GPIO/FMC_D3 |
| Broche 60 | VSS — Digital ground |
| Broche 61 | VDD — Digital power supply (3.3V) |
| Broche 62 | VREF- — ADC ground reference |
| Broche 63 | PC0 — GPIO/ADC1_INP10 |
| Broche 64 | PC1 — GPIO/ADC1_INP11 |
Applications typiques
STM32H7A3RIT6 convient pour 6 applications: Industrial Motor Control, Human-Machine Interface (HMI) with TFT LCD, Audio Processing and Codec, Industrial IoT Gateway, Drone and UAV Flight Controller, Point-of-Sale (POS) Terminal.
Industrial Motor Control
The STM32H7A3RIT6 is well suited for industrial motor control applications because its Cortex-M7 core at 280 MHz can execute FOC (Field-Oriented Control) algorithms for PMSM, BLDC, and stepper motors within a single 1 us control loop. The dual FDCAN controllers enable robust communication with industrial fieldbus networks, while the 16-bit ADC with up to 20 channels supports three-phase current sensing with simultaneous sampling. The 2 MB Flash allows storing both application code and field-tuned motor parameters without external memory. Compared to STM32F4-based designs, the H7A3RIT6 delivers approximately 2x the computational headroom, reducing loop time jitter and improving torque ripple performance in high-end servo drives. The 64-LQFP package provides sufficient GPIO for encoder interfaces, Hall sensors, and PWM channels required for 3-shunt or 1-shunt current sensing topologies.
Recommandé
Human-Machine Interface (HMI) with TFT LCD
The STM32H7A3RIT6 drives small to medium-resolution TFT LCDs in HMI applications through its integrated FMC (Flexible Memory Controller) and SPI interfaces. The 64-LQFP package provides enough GPIO for a 16-bit parallel RGB interface to displays up to 480x272 (WQVGA) at moderate refresh rates, or SPI-based displays up to 320x240 (QVGA). The 2 MB Flash is sufficient to store full-screen UI bitmaps, fonts, and embedded GUIs (emWin, TouchGFX), while the 1 MB DTCM enables high frame-rate animation without external PSRAM. The Cortex-M7's Chrom-ART accelerator and JPEG codec hardware offload graphic operations. Designers can use STM32CubeMX's TouchGFX integration to design fluid UIs. Compared to F4-based designs, the H7A3RIT6 doubles GUI performance, eliminating tearing at higher pixel clocks.
Recommandé
Audio Processing and Codec
The STM32H7A3RIT6 excels in audio processing applications thanks to its dedicated SAI (Serial Audio Interface) supporting I2S, TDM, and AC97 protocols, plus dual 12-bit DACs for analog output. The Cortex-M7's SIMD DSP instructions enable real-time audio effects (reverb, EQ, dynamics) at 48 kHz sample rates, while 1376 KB SRAM supports multi-channel audio buffering without DMA overruns. The 64-LQFP package fits mid-tier audio products like DJ controllers, multi-zone amplifiers, and conference phones. The 16-bit ADC supports microphone array sampling for beamforming. Compared to STM32F4, the H7A3RIT6's higher core clock and larger SRAM enable 4-8x more audio processing channels. Combined with a low-noise LDO such as the LD39050PU33R, the H7A3RIT6 enables consumer-audio-grade performance at industrial price points.
Recommandé
Industrial IoT Gateway
The STM32H7A3RIT6 serves as an Industrial IoT gateway controller, aggregating sensor data from field devices over its two FDCAN channels, USART/SPI/I2C interfaces, and SDMMC for local logging. The 280 MHz Cortex-M7 with 1 MB DTCM handles protocol conversion (Modbus, CANopen, EtherCAT slave) and edge analytics without external memory. The 2 MB Flash supports secure firmware updates with the integrated OTA bootloader, while the USB 2.0 FS OTG provides local configuration access. The OCTOSPI interface allows encrypted external Flash storage for event logs. Compared to F7-based designs, the H7A3RIT6 offers 50% more SRAM for buffering concurrent streams, reducing packet drops in high-traffic scenarios. The 64-LQFP package is widely accepted in industrial environments where hand-rework is preferred over BGA.
Recommandé
Drone and UAV Flight Controller
The STM32H7A3RIT6's 280 MHz Cortex-M7 performance makes it a strong candidate for entry-level to mid-tier drone flight controllers running PX4 or ArduPilot firmware. The FPU enables real-time PID loops for attitude control at 1 kHz rates with minimal jitter, while the 2 MB Flash accommodates full PX4 NuttX builds. The 64-LQFP package provides dedicated PWM timer channels for up to 8 motor outputs plus GPIO for IMU, barometer, and GPS interfaces via SPI/I2C. The dual FDCAN controllers support modern UAVCAN peripherals for smart batteries and GPS modules. Compared to the popular STM32F405-based flight controllers, the H7A3RIT6 provides approximately 2.5x more computational headroom for advanced features like obstacle avoidance and computer-vision pre-processing. The 1 MB DTCM is essential for tight-loop sensor fusion.
Recommandé
Point-of-Sale (POS) Terminal
The STM32H7A3RIT6 supports POS terminal applications where it manages secure payment processing, barcode scanning, receipt printing, and connectivity (NFC, Ethernet, Wi-Fi via SPI modules). The Cortex-M7 with TrustZone-M enables secure boot and cryptographic acceleration, while the 2 MB Flash holds both application firmware and cryptographic keys. The 64-LQFP package suits compact terminal enclosures, and the USB 2.0 OTG supports host/device modes for printer peripherals. The OCTOSPI interface allows secure external Flash for transaction logs with hardware encryption. Compared to F4-based designs, the H7A3RIT6 delivers 50% faster barcode decoding and faster secure-element handshakes, reducing transaction latency. The 1376 KB SRAM supports full-color receipt preview bitmaps without external PSRAM, lowering BOM cost.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32H7A3RIT6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32H7A3LIT6 | STM32H7A3RIT3 | STM32H7B0RIT6 | STM32H753IIT6 | GD32H737VBT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (same) | 64-LQFP (same) | 64-LQFP (same) | 176-LQFP (different) | 100-LQFP (different) |
| Core | Cortex-M7 280 MHz | Cortex-M7 280 MHz | Cortex-M7 280 MHz | Cortex-M7 280 MHz | Cortex-M7 480 MHz | Cortex-M7 550 MHz |
| Flash Memory | 2 MB | 1 MB | 2 MB | 128 KB | 2 MB | 2 MB |
| SRAM | 1376 KB | 1376 KB | 1376 KB | 128 KB | 1 MB | 1 MB |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG + HS |
| CAN-FD | 2x FDCAN | 2x FDCAN | 2x FDCAN | 2x FDCAN | 2x FDCAN | 2x FDCAN |
Principaux différenciateurs
- 2 MB Flash in 64-LQFP - largest Flash in LQFP-64 STM32H7 series (vs STM32H7A3LIT6)
- Extended temperature grade for industrial applications (vs STM32H7A3RIT3)
- Larger SRAM and OCTOSPI for graphics expansion (vs STM32H7B0RIT6)
- Higher performance headroom in larger package (vs STM32H753IIT6)
- Cross-brand alternative from GigaDevice at higher clock rate (vs GD32H737VBT6)
Notes de conception
The STM32H7A3RIT6 requires careful power sequencing on VDD (1.62-3.6 V) and VBAT for RTC backup. The D1 domain (high-performance core) and D2 domain (peripherals) each require separate decoupling with 100 nF + 4.7 uF + 10 uF ceramic capacitors placed within 3 mm of their respective VDD pins. Use ST's reference design from the Nucleo-H7A3ZI-Q board for a validated decoupling network, including a ferrite bead on the analog VREF+ supply to isolate from digital switching noise. Estimated: VDD current at 280 MHz active mode is approximately 200 mA, so the LDO must source at least 250 mA with adequate headroom.
At 280 MHz active mode with full peripheral utilization, the STM32H7A3RIT6 dissipates up to 500 mW. The 64-LQFP package has a theta_JA of approximately 40 C/W, giving a junction temperature rise of 20 C above ambient at full load. For industrial applications above 70 C ambient, ensure the PCB has at least 4 layer copper pour on the VDD plane for thermal spreading. The exposed thermal pad (where available on adjacent packages) is not present on 64-LQFP, so thermal performance relies on lead frame soldering to inner power planes. Use thermal vias under any exposed VSS/VDD pin groups.
Route the 32 kHz LSE crystal traces within 5 mm of OSC32_IN/OUT pins with a ground guard ring to minimize crosstalk with high-speed signals. The HSE crystal (typically 8-25 MHz) requires similar routing constraints. Place the NRST reset circuit (10 kohm pull-up + 100 nF capacitor) within 3 mm of the NRST pin. The SWD/JTAG connector must be within 50 mm trace length for reliable debug access - keep these traces away from switching power supplies and clock signals. For OCTOSPI external Flash routing, use matched-length traces with 50 ohm impedance control.
Do not leave the BOOT0 pin floating - tie it to VSS via a 10 kohm resistor for normal boot, or to VDD for system memory bootloader. The internal SMPS mode (default) requires the VCORE pin to be decoupled with 4.7 uF + 100 nF; failing to do so can cause core instability at high frequencies. When using the OCTOSPI in memory-mapped mode, enable the instruction cache prefetch and configure the wait states per the datasheet equation; otherwise random hard faults will occur at random addresses. Do not exceed 50 MHz on SDMMC signals without impedance-controlled routing.
Informations de conformité
RoHS and REACH compliant per ST product page; T6 industrial grade (-40 to +85 C); not AEC-Q100 qualified (select Q-suffix variant for automotive); lead-free and halogen-free per ST declarations
