What this Stellaris MCU brings to a control board
The LM3S1850-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® series, clocked at 50 MHz with 256 KB of Flash and 32 KB of RAM. It packs 56 general-purpose I/O lines and a full set of serial interfaces — I²C, SPI, UART, IrDA, Microwire, QEI, and SSI — making it a natural fit for motor-control panels, HMI front-ends, or sensor hubs that need to talk to multiple peripherals without external bridge chips. The internal oscillator keeps the BOM lean for applications where a few percent timing accuracy is acceptable.
50 MHz core — enough for real-time loops, not for heavy DSP
The 50 MHz Cortex-M3 handles PID loops, Modbus packet parsing, and display updates without breaking a sweat. If your algorithm needs floating-point or sustained multiply-accumulate, you'd look at a Cortex-M4F part instead — this core is about control logic and communication, not signal processing.
NRND — plan your BOM accordingly
Texas Instruments lists this part as NRND (Not Recommended for New Designs). For existing production, we source it through independent distribution.