What this part is and where it fits
The LM3S8630-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Texas Instruments Stellaris 8000 series. It runs at 50 MHz and packs 128 KB of Flash program memory and 32K x 8 of RAM, with a rich peripheral set that includes CAN, Ethernet, I²C, SPI, SSI, UART, and IrDA. The 100-pin LQFP package gives you 31 general-purpose I/O lines, and the operating temperature range of -40 to 85 °C makes it suitable for industrial control, building automation, and networked sensor nodes that need both fieldbus and Ethernet connectivity.
50 MHz Cortex-M3 — what it means for the bus
The core runs at 50 MHz using the internal oscillator.
Obsolete — sourcing reality
Texas Instruments has marked the LM3S8630-IQC50-A2T as obsolete. No official successor part number has been published for this exact order code. The Stellaris family was acquired and transitioned into the Tiva C series, but pin-compatibility is not guaranteed without a full design review. For a BOM line that needs this exact part, the only channel is the independent surplus and broker market. We source and quote it to order against an RFQ; availability and current pricing are confirmed at quote time.