The LM3S328-IGZ25-C2T: This is a compact, cost-optimised MCU aimed at control applications where the code footprint stays under 16 KB and the data buffers fit within 4 KB — think sensor polling, relay sequencing, or a simple protocol bridge. The 28 general-purpose I/O pins and the 8-channel 10-bit ADC give it enough interface headroom for a handful of digital sensors and one analog feedback line. The internal oscillator means you can skip an external crystal for basic timing, though the PLL-based clock tree still needs a flash wait state adjustment if you push the core near 25 MHz from a lower startup frequency.
48-VFQFN with exposed pad — rework and thermal considerations
The 48-VFQFN package (7x7 mm body) has an exposed thermal pad underneath.
Connectivity and peripherals — I²C, SPI, UART, SSI, Microwire
The peripheral set includes I²C, SPI, SSI, Microwire, and UART/USART interfaces. SSI and Microwire are legacy synchronous serial protocols still common in industrial sensor modules.
For dual-sourcing resilience, the Stellaris 300 series includes several pin-compatible density variants — the 32 KB Flash / 8 KB SRAM LM3S328-IGZ25-C2 is a direct drop-in if your firmware grows beyond 16 KB.