What this 16-bit MCU brings to a BOM
The MSP430F6631IZQWR: Runs at 20 MHz with 192 KB Flash and 18 KB RAM.
20 MHz core and memory — what they mean for firmware
The 20 MHz clock rate and 192 KB Flash support moderate firmware stacks. The 18 KB RAM handles packet buffers and real-time data arrays.
USB and serial connectivity — interface integration note
The integrated USB peripheral simplifies adding a USB device port. LINbus and IrDA support can save a separate interface IC.
Package and temperature grade — design constraints
The 113-VFBGA (Microstar Junior 7x7 mm) is a fine-pitch BGA requiring multi-layer PCB and X-ray inspection.
Obsolete — sourcing reality for sustainment programs
That means no further factory orders are accepted; the last-time-buy window has closed. No official TI replacement has been published for this exact order code, so any substitute must be validated for pin-compatibility and firmware porting.