STMicroelectronics STM32H7B3NIH6

Overview

STM32H7B3NIH6 from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz, featuring double-precision FPU, 2 Mbytes of flash memory, ~1.4 Mbytes of RAM (including 64 Kbytes ITCM + 128 Kbytes DTCM), and integrated SMPS regulator. It supports dual Octo-SPI with on-the-fly AES-128 decryption, FMC for NOR/SDRAM/NAND, and advanced analog peripherals including two 16-bit ADCs (up to 3.6 MSPS) and dual 12-bit DACs - deployed in industrial motor control and medical imaging systems.

For engineers reviewing the STM32H7B3NIH6 datasheet, STM32H7B3NIH6 pinout, STM32H7B3NIH6 application, or STM32H7B3NIH6 equivalent, key selection criteria include verified 280 MHz real-time performance, TCM RAM allocation for deterministic code execution, Octo-SPI DTR mode timing (up to 110 MHz), and hardware JPEG codec support for embedded vision preprocessing.

Technical Context

The device implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, and L1 cache line fill in single access from 128-bit flash. It integrates three independent PLLs (system + two kernel clocks) with fractional mode for precise clock tree synthesis across multiple domains.

Memory subsystem includes AXI/AHB interconnect matrices, 5 DMA controllers (including MDMA for high-bandwidth transfers), and dual-bank flash enabling read-while-write. Power management features two independent domains (CPU domain and Smart Run Domain), each with configurable voltage scaling and retention modes.

Key Specifications

Pinout & Package

UFBGA169 package (7 × 7 mm, 0.5 mm ball pitch) with 168 general-purpose I/Os (164 5-V-tolerant), 6 wakeup pins, and dedicated power/ground balls for VDD/VSS, VDDA/VSSA, VCAP, VDDLDO, VDDSMPS/VSSSMPS, and VBAT. Pinout validated per DS13139 Rev 8 Table 7 and STM32H7B3NIH6-specific ball definition.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance Arm Cortex-M7 microcontroller applications.

Compared with STM32H7B3NIH6, STM32H743VIH6 omits SMPS and OTFDEC - increasing power design effort and memory security burden - while STM32H753IIK6 adds Ethernet and trace at the cost of larger footprint and higher pin count, making STM32H7B3NIH6 optimal for compact, self-powered, secure edge nodes.

Availability

STM32H7B3NIH6 is available at Aetrix Electronics and suitable for industrial motor control, portable medical devices, smart building HVAC systems, and secure industrial gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H7B3NIH6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components since 1987.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, cryptographic security, and rich peripheral integration - specifically engineered for industrial automation, medical instrumentation, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency and voltage range for STM32H7B3NIH6?

The STM32H7B3NIH6 operates at up to 280 MHz across an ambient temperature range of −40 °C to +85 °C and a supply voltage range of 1.62 V to 3.6 V. Voltage can drop to 1.62 V only when using an external power supervisor and connecting PDR_ON to VSS; otherwise, minimum is 1.71 V with internal PVD enabled. Junction temperature is limited to 105 °C in VOS0 mode.

Does STM32H7B3NIH6 support hardware encryption for external memory?

Yes - it integrates two OTFDEC (On-The-Fly Decryption) modules supporting AES-128 in CTR mode for both Octo-SPI interfaces. This enables transparent decryption of external NOR/PSRAM/HyperRAM contents during memory fetch, eliminating software overhead and protecting firmware IP stored off-chip.

How many analog-to-digital converters does STM32H7B3NIH6 include, and what are their key specs?

It includes two 16-bit ADCs with up to 24 input channels and a maximum sampling rate of 3.6 MSPS. Both ADCs support synchronous dual-mode sampling, hardware oversampling, and injection/conversion sequencing. They operate in the 1.62–3.6 V VDDA range and feature built-in calibration and offset correction.

Is the SMPS regulator in STM32H7B3NIH6 fully integrated, and what external components are required?

Yes - the integrated SMPS is a complete step-down DC-DC converter requiring only an external inductor (typically 2.2 µH), input/output capacitors (≥10 µF ceramic), and optional compensation network. It directly supplies VCORE and supports dynamic voltage scaling (VOS0–VOS3) to optimize power/performance trade-offs in real time.