Obsolete — sourcing reality for your BOM
The MSP430F5522IZQE is obsolete per Texas Instruments. Production has ceased; no last-time-buy windows remain. Sourcing is through the independent surplus market.
25MHz core and memory — what they mean for fit
25MHz CPU speed is the ceiling for this 16-bit core. 32KB Flash and 10KB RAM support a USB stack and moderate data arrays.
80-BGA package — board and rework considerations
The 80-ball VFBGA (MICROSTAR JUNIOR, 5x5 mm body) is a fine-pitch BGA. It demands a controlled-impedance PCB with via-in-pad or microvia capability for routing all 47 I/O plus power and ground balls. Rework requires a dedicated BGA station and X-ray inspection to verify solder-joint integrity. The small footprint saves board area, but the trade-off is that manual probing and rework are impractical. For repair or retrofit scenarios, verify that your reflow profile and stencil design match the datasheet recommendations.
