TI has discontinued this 80-BGA variant of the MSP430F5xx family. There is no official direct-replacement order code listed in the lifecycle record.
25 MHz MSP430 CPUXV2 — what it buys you
The core runs at 25 MHz, which is the mid-range speed tier for the MSP430F5xx family. At this clock the CPUXV2 16-bit RISC core can sustain around 25 MIPS from internal Flash with one wait state. The 128 KB program memory (128K x 8) and 32K x 8 RAM give enough room for a moderate sensor-fusion or control loop with a small RTOS or TI's MSP430 driverlib. The 53 I/O lines are brought out to the 80-ball BGA — enough for a parallel LCD data bus plus a handful of GPIO for keypad and status LEDs.
80-BGA MICROSTAR JUNIOR — layout and assembly notes
The package is an 80-ball BGA on a 5x5 mm substrate (MICROSTAR JUNIOR). Ball pitch is 0.5 mm nominal — that drives a minimum of four PCB layers for fanout and a controlled-impedance stack if any of the high-speed peripherals (SPI, UART) run near the 25 MHz core clock. No exposed thermal pad — all dissipation is through the BGA balls into the board copper.