Obsolete — what that means for your BOM
Texas Instruments has marked the LM3S1H11-IBZ80-A2 as Obsolete.
Core specs and what they drive
The ARM Cortex-M3 core runs at 80 MHz — enough throughput for a real-time control loop handling sensor fusion, PID updates, and a communication stack without external memory. The 512 KB on-chip Flash and 48 KB SRAM leave room for a moderate application after the HAL and RTOS footprint.
Package and board-fit reality
Housed in a 108-BGA (10x10 mm) package. The 0.65 mm ball pitch demands a 4-layer PCB for fan-out — two-layer boards won't break out the inner rows. Reflow soldering is required; hand-soldering a BGA of this density is not practical. The 67 I/O lines include an external bus interface (EBI/EMI), multiple serial ports (I²C, SPI, UART, IrDA, LIN, Microwire, SSI), and 8 channels of 12-bit ADC.