What this part is and where it fits
The Texas Instruments LM3S6633-IBZ50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 6000 series, clocked at 50 MHz with 128 KB of Flash program memory and 32 KB of SRAM. It integrates an Ethernet MAC, I²C, SPI, SSI, UART/USART, and IrDA interfaces, plus three 10-bit ADC channels, PWM, and a watchdog timer — a fit for industrial control nodes, building automation gateways, and sensor hubs that need wired networking and moderate local processing.
50 MHz core — what it means for the BOM
The 50 MHz ARM Cortex-M3 core runs a lightweight TCP/IP stack alongside real-time control loops. This consolidates the BOM into a single chip, saving board space and reducing interconnect complexity.
Industrial temperature range and package
Rated for -40°C to 85°C, the LM3S6633-IBZ50-A2T suits factory-floor equipment, outdoor telecom cabinets, and engine-bay electronics without active cooling. The 108-ball BGA (10x10 mm body) requires a multi-layer PCB with controlled-impedance traces for the Ethernet PHY interface — plan for four or more layers and a clean ground plane under the BGA footprint.
Obsolete — sourcing reality
This part is officially obsolete — no longer in production from Texas Instruments. There is no listed direct replacement from the manufacturer. For existing BOM lines, procurement must source through the independent surplus and broker channel. We can quote the LM3S6633-IBZ50-A2T to order against an RFQ; availability and current pricing are confirmed at quote time. Store the reels dry — the BGA package is moisture-sensitive, and long-term storage without a dry cabinet risks solder-joint reliability.