STMicroelectronics STM32H503RBT7

Overview

STM32H503RBT7 from STMicroelectronics is an Arm® Cortex®-M33 32-bit microcontroller with FPU, operating up to 250 MHz (375 DMIPS), featuring 128 Kbytes flash memory with ECC, 32 Kbytes SRAM with ECC, and integrated I3C, FDCAN, USB 2.0 FS host/device, and hardware security accelerators (HASH, RNG, 96-bit UID). It targets secure, low-power industrial control and IoT edge nodes requiring real-time performance and cryptographic integrity.

For engineers reviewing the STM32H503RBT7 datasheet, STM32H503RBT7 pinout, STM32H503RBT7 application, or STM32H503RBT7 equivalent, key selection criteria include its dual-bank read-while-write flash, 2.5 MSPS 12-bit ADC, ultra-low-power comparator, 7 MHz op-amp, and support for Stop/Standby modes with VBAT-backed RTC and 32 backup registers.

Technical Context

The device implements a TrustZone-enabled Cortex-M33 core with MPU, ART Accelerator (8-Kbyte instruction cache enabling zero-wait-state execution at 250 MHz), and dual PLLs for system, USB/audio, and ADC clock domains. Its memory subsystem includes ECC-protected flash and SRAM, plus 2-Kbyte OTP and 2-Kbyte backup SRAM active in lowest power modes.

Peripheral integration centers on mixed-signal capability: one 12-bit ADC (2.5 MSPS), one dual-channel 12-bit DAC, one ultra-low-power comparator, one 7 MHz op-amp, and digital temperature sensor - all co-located with dual DMA controllers, authenticated debug (SWD/JTAG), and hardware crypto (SHA-1/SHA-2, HMAC, TRNG).

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 64 leads; RoHS-compliant ECOPACK2 finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32H563VIT6 and STM32L562RET6, the STM32H503RBT7 delivers optimal balance of real-time performance (250 MHz), integrated security (TrustZone + HASH), and analog capability (ADC/DAC/op-amp/comparator) in a compact LQFP64 package - making it ideal for cost-sensitive, secure edge nodes requiring both processing headroom and sensor interface fidelity.

Availability

STM32H503RBT7 is available at Aetrix Electronics and suitable for industrial motor control, secure IoT edge nodes, medical wearables, and smart building controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H503RBT7 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 analog components for industrial, automotive, and consumer markets.

The STM32H5 series targets high-assurance embedded systems demanding real-time performance, hardware-enforced security (TrustZone), and rich analog integration - specifically engineered for secure industrial control, certified medical devices, and trusted IoT endpoints.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the STM32H503RBT7?

The STM32H503RBT7 operates at up to 250 MHz with an Arm Cortex-M33 core and achieves 375 DMIPS (Dhrystone 2.1). This performance level is sustained with ART Accelerator enabled, delivering zero-wait-state execution from flash memory. The core also supports DSP instructions and a floating-point unit for signal processing workloads.

Does the STM32H503RBT7 support hardware-based security features beyond software libraries?

Yes - it integrates dedicated hardware accelerators including HASH (SHA-1/SHA-2), HMAC, and a True Random Number Generator (TRNG), alongside TrustZone-enabled memory protection and 96-bit unique ID. Active tamper detection monitors physical intrusion attempts, and secure boot enforces cryptographic signature verification before firmware execution.

Which low-power modes retain analog functionality such as the op-amp or comparator?

The ultra-low-power comparator and operational amplifier remain functional in Stop mode, enabling continuous sensor signal conditioning without waking the CPU. In Standby mode, only the RTC, backup registers, and LSE oscillator remain active; analog peripherals are powered down. Both modes support VBAT-supplied retention of critical state.

What package options are available for the STM32H503RBT7, and which one corresponds to this part number?

The STM32H503RBT7 is specified in the LQFP64 (10 × 10 mm, 0.5 mm pitch) package per ST's ordering information. Other variants in the H503xx family include WLCSP25, UFQFPN32/48, and LQFP48 - but RBT7 suffix explicitly denotes the LQFP64 variant with industrial temperature range (–40°C to +85°C) and standard voltage (1.71–3.6 V).