100 MHz Cortex-M3 — what the core speed delivers
The 100 MHz clock on the Cortex-M3 core gives this MCU enough throughput to run a lightweight TCP/IP stack (e.g., lwIP) alongside a real-time control loop without external memory. The single-cycle multiply and hardware divide keep interrupt latency predictable for PWM and motor-control tasks.
NXP continues to manufacture the LPC17xx series, and no last-time-buy notice has been issued. For current BOM commitments, the part can be specified without an obsolescence contingency — though as with any 32-bit MCU, a second-source review is prudent for high-volume builds.