Obsolete — independent-channel sourcing
Texas Instruments has marked the LM3S1968-IBZ50-A2 as Obsolete.
Core and memory for control applications
It integrates 256 KB of on-chip Flash program memory and 64 KB x 8 of SRAM — sufficient for a moderate control stack, communications buffer, and data logging without external memory.
52 general-purpose I/O lines give the designer latitude for parallel buses, keypad matrices, or discrete sensor inputs. On-chip peripherals include brown-out detect, POR, PWM, and a watchdog timer. Connectivity covers I²C, IrDA, Microwire, QEI, SPI, SSI, and UART/USART — enough serial channels to interface with a display, motor encoder, and host link simultaneously. An 8-channel 10-bit ADC handles analog inputs like thermistors or potentiometers without an external converter. The internal oscillator saves a crystal on the BOM for applications that tolerate ±1–2% clock accuracy.
108-BGA package — layout considerations
Housed in a 108-LFBGA with a 10x10 mm body, the package demands a 4-layer PCB for fan-out of the 0.50 mm pitch balls.