Texas Instruments has marked the LM3S1N11-IBZ50-C3T as obsolete. No last-time-buy window remains open. The base product number is LM3S1N11; the IBZ50 suffix identifies the 108-BGA package and 50 MHz speed grade, while C3T indicates tape-and-reel packaging.
Cortex-M3 core with 50 MHz and 64 KB flash
The 64 KB on-chip flash (64K x 8) and 12K x 8 SRAM provide enough code and data space for moderate-complexity control applications such as motor drives, human-machine interfaces, or sensor hubs.
Connectivity options include I²C, SPI, SSI, UART/USART, IrDA, LINbus, and Microwire — enough serial interfaces to handle multiple sensor buses, a debug UART, and a display link simultaneously. The 67 GPIOs are available on the 108-ball BGA package (10x10 mm), which is a compact footprint for space-constrained PCBs. On-chip peripherals include a brown-out detect/reset, DMA controller, POR, PWM outputs, and a watchdog timer. The 8-channel 10-bit ADC handles analog inputs like potentiometers or current-sense resistors without an external converter.