48-VFQFN with exposed pad — what the package tells you
The LM3S817-IGZ50-C2 comes in a 48-VFQFN with an exposed pad, supplier package designated 48-VQFN (7x7).
50 MHz core, 64 KB Flash — sizing the firmware budget
The 8 KB SRAM is the tighter resource: it holds the stack, heap, and DMA buffers, so any application with large lookup tables or multi-frame ADC capture needs to budget carefully. The 6-channel 10-bit ADC is integrated, saving an external converter for basic analog inputs.
That covers outdoor telecom cabinets, factory-floor automation, HVAC controllers, and engine-bay-adjacent electronics that see cold starts but not under-hood heat.
Peripherals and connectivity — what's on the bus
On the peripheral side you get a brown-out detect and POR for supply supervision, a PWM module for motor or LED drive, and a watchdog timer. The 30 I/O lines are adequate for a compact control board with a keypad, display, and a few sensors.
Lifecycle — active, no LTB shadow
The base product number LM3S817 covers the family, and the -IGZ50 suffix locks in the 50 MHz speed grade.