STM32H503 in STM32 Family
The STM32H503 sub-family from STMicroelectronics represents the entry-level tier of the high-performance STM32H5 series. Built on the 32-bit ARM Cortex-M33 core with a floating-point unit, these microcontrollers bridge the gap between standard mainstream MCUs and high-end performance chips. Operating at frequencies up to 250 MHz, they provide a cost-effective solution for developers requiring modern security features and high-speed processing without the overhead of massive memory footprints or complex peripheral sets found in the H563/H573 lines.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | I/O Pins | Core Processor | Package | ADC/DAC | Temp Range | Stock |
|---|---|---|---|---|---|---|
| STM32H503RBT6 (STMicroelectronics) | 49 | ARM Cortex-M33 | LQFP-64 | A/D 16x12b SAR; D/.. | -40degC ~ 85degC (.. | 1,449 |
| STM32H503CBU7TR (STMicroelectronics) Tape & Reel | 35 | ARM Cortex-M33F | UFQFN-48 | A/D 10x12b SAR; D/.. | -40degC ~ 105degC .. | 7,496 |
| STM32H503KBU6 (STMicroelectronics) | 24 | ARM Cortex-M33 | UFQFN-32 | A/D 10x12b SAR; D/.. | -40degC ~ 85degC (.. | 1,704 |
| STM32H503CBT6 (STMicroelectronics) | 35 | ARM Cortex-M33 | LQFP-48 | A/D 10x12b SAR; D/.. | -40degC ~ 85degC (.. | 2,942 |
Variants within the STM32H503 sub-family are primarily distinguished by their physical packaging and pin counts, ranging from 32-pin UFQFPN to 48-pin LQFP or UFQFPN configurations. While core performance remains consistent at 250 MHz with 128KB Flash across the line, the different packages impact the number of available GPIOs and specific peripheral multiplexing options. Temperature ratings also vary, with some versions qualified for extended industrial ranges up to 125°C.
