The Texas Instruments LM3S1751-IBZ50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 1000 series, clocked at 50 MHz with 128 KB of Flash program memory and 64K x 8 of SRAM. It integrates a 4-channel 10-bit ADC, six serial interfaces (I²C, IrDA, Microwire, SPI, SSI, UART/USART), and a full set of on-chip peripherals including brown-out detect, POR, PWM, and watchdog timer. This part is designed for industrial control, sensor aggregation, and motor-drive applications where a moderate-speed Cortex-M3 core and a rich peripheral set are needed in a compact 108-ball BGA package.
50 MHz Cortex-M3 — what it buys you
At 50 MHz, this core handles UART/SPI/I²C bridging, PWM generation for a two-phase motor, and a modest control loop without breaking a sweat. The 128 KB Flash is sized for a bootloader plus a few hundred lines of application code; if your firmware image runs over that, you are looking at a larger Flash member in the same family. The 64K x 8 SRAM gives enough headroom for a moderate stack and a few frame buffers — fine for a sensor hub, tight for a GUI.
Temperature grade and environment
Rated for -40°C to 85°C ambient, this MCU suits industrial enclosures, outdoor telecom cabinets, and under-hood automotive auxiliary modules (non-safety-rated). The internal oscillator eliminates an external crystal for basic timing, though precision UART baud rates may still need an external clock source.