What this part is — and where it fits
The LM3S8938-EQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from Texas Instruments' Stellaris® series, running at 50 MHz. It packs 256 KB of Flash program memory and 64 KB of SRAM, with a rich peripheral set including CAN, Ethernet, multiple UARTs, SPI, I²C, and an 8-channel 10-bit ADC. The industrial temperature range (-40 to 105°C) and 100-pin LQFP package make it a fit for embedded control in factory automation, building management, and networked sensor nodes where a single-chip Ethernet + CAN gateway is needed.
50 MHz Cortex-M3 — what the speed means for your design
The core runs at 50 MHz. The Cortex-M3 single-cycle multiply helps with deterministic response.
Memory and connectivity — what the 256 KB Flash and 64 KB SRAM let you do
256 KB Flash is comfortable for a bootloader plus a moderate application stack (e.g., a Modbus TCP slave with a web server). The 64 KB SRAM leaves room for a couple of large buffers — one for the Ethernet frame, one for CAN message queues. If you need more than that, you'll be looking at external memory or a larger part in the family.
Industrial temperature rating — deployment context
Rated for -40 to 105°C ambient, this MCU is suited for outdoor telecom cabinets, motor drive enclosures, and engine-bay-adjacent controllers. The 100-LQFP (14×14 mm) package is a standard footprint for reflow assembly; verify your paste mask for the fine pitch.
Lifecycle status — obsolete, sourced to order
Texas Instruments has marked the LM3S8938-EQC50-A2T as obsolete (EOL). No official successor part is listed in the evidence. For new designs, consider a current-generation Stellaris or Tiva-C series MCU with similar peripheral mix. For existing BOM lines, this part is sourced through independent distribution and quoted to order against an RFQ — availability and current pricing confirmed at quote time.