The SF32LB52x series represents a highly integrated, high-performance System-on-Chip (SoC) microcontroller designed for ultra-low-power AIoT scenarios. Featuring an innovative ARM Cortex-M33 STAR processor-based big.LITTLE architecture, it integrates the industry's top-tier 2D graphics engine, AI neural network accelerator, and Bluetooth Low Energy 5.2, making it ideal for wristband-type wearables, smart terminals, smart home devices, and beyond.
| Chip Series | Sub-model | Package | GPIO | SiP QSPI-NOR Flash | SiP OPI-PSRAM | Power Supply | I/O Voltage |
| SF32LB | 520U36 | QFN68L | 44 | 1MB | NA | 3.2~4.7V | 3.3V |
| SF32LB | 523UB6/5UC6/7UD6 | QFN68L | 44 | NA | 4/8/16MB | 3.2~4.7V | 3.3V |
| SF32LB | 52AU36/U56 | QFN68L | 45 | 1/4MB | NA | 1.8V | 3.3V/1.8V |
| SF32LB | 52BU36/U56 | QFN68L | 45 | 1/4MB | NA | 3.3V | 3.3V/1.8V |
| SF32LB | 52DUB6 | QFN68L | 45 | NA | 4MB | 1.8V | 3.3V/1.8V |
| SF32LB | 52EUB6 | QFN68L | 45 | NA | 4MB | 3.3V | 3.3V/1.8V |