What this MCU is and where it fits
The Texas Instruments LM3S1512-IQC25-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® 1000 series, clocked at 25 MHz with 96 KB of Flash program memory and 64 KB of SRAM. It is built for embedded control applications that need a balanced mix of processing throughput, peripheral integration, and industrial temperature tolerance — think motor-control nodes, sensor hubs, human-machine interface front-ends, and fieldbus gateways on factory floors or outdoor telecom cabinets. The part integrates a 2-channel 10-bit ADC, a quadrature encoder interface (QEI) for motor position feedback, and a full set of serial connectivity: I²C, SPI, SSI, UART/USART, IrDA, and Microwire. On-chip brown-out detect, POR, PWM, and a watchdog timer reduce external component count. The 58 general-purpose I/O lines in the 100-LQFP package give enough headroom for parallel displays, keypad matrices, or sensor arrays without a port expander.
NRND — plan the last-time-buy or the migration
Texas Instruments has classified the LM3S1512-IQC25-A2T as Not Recommended for New Designs (NRND). That means the part is still available for existing production runs, but TI will not support it in new projects, and a discontinuation notice is the next step. For a BOM line that already carries this MCU, the procurement action is to estimate remaining lifetime demand and place a last-time-buy order before the window closes. For a new design, this part should not be selected — look at the current Stellaris or Tiva C Series portfolio for a pin-compatible or software-migration path.
Sourcing and compliance
The LM3S1512-IQC25-A2T is sourced through independent distribution channels and quoted to order against an RFQ. The part is supplied in Tape & Reel (TR) for automated assembly.