What this part is and where it fits
The LM3S6537-EQC50-A2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 6000 series, clocked at 50 MHz with 96 KB of Flash and 64 KB of RAM. It integrates an Ethernet MAC, multiple serial interfaces (I²C, SPI, SSI, UART), and a 4-channel 10-bit ADC. The industrial temperature range (-40°C to 105°C) suits it for motor drives, factory automation, outdoor telecom, and other harsh environments where a network-connected controller is needed.
50 MHz Cortex-M3 — what it means for the design
The 50 MHz core delivers enough throughput for real-time control loops and moderate protocol stacks. The Ethernet MAC can handle TCP/IP offload without a separate controller, but the 64 KB RAM limits buffer depth — expect to tune stack memory for smaller packet windows. The 96 KB Flash is sized for a single firmware image; field updates over Ethernet are possible with a bootloader partition.
Lifecycle and sourcing reality
This part is marked obsolete by the manufacturer. No official successor is listed. For BOM lines that require this exact order code, sourcing moves to the independent channel. We can quote and source LM3S6537-EQC50-A2 to order against an RFQ; availability and current pricing are confirmed at quote time.
Connectivity and peripheral set
Ethernet, I²C, SPI, SSI, UART, and IrDA are on-chip. The 41 GPIOs are multiplexed with these peripherals. The internal oscillator saves an external crystal for non-critical timing.