Obsolete — sourcing from the spot market
This part is officially marked obsolete. Date codes will vary, and the available quantity is whatever remains in the supply chain. There is no official TI replacement listed under this base number; the LM3S1635-EQC50-A2T is a specific speed/temperature grade variant that may not have a direct pin-compatible drop-in from the current TI portfolio. If you need a production-quantity commitment, expect to qualify against a current-generation ARM Cortex-M3 or M4 MCU from TI or another vendor.
The 50 MHz Cortex-M3 core delivers enough throughput for moderate control loops, protocol bridging, and sensor fusion without an external clock source — the internal oscillator is on-chip.