Bluetooth MCU in a fine-pitch BGA — the board-fit reality
The MSP430BT5190IZQWT: Housed in a 113-ball VFBGA Microstar Junior package measuring 7x7 mm, the 0.50 mm ball pitch demands a controlled impedance PCB stack-up and precise solder-paste deposition — this is not a hand-solderable part.
256 kB of on-chip FLASH with 16 KB RAM is sized to hold a Bluetooth stack (typically 60-100 kB) plus the application code and data buffers, leaving headroom for field updates via the UART or SPI bootloader. 87 general-purpose I/O lines in a 113-ball BGA means most balls are GPIO — useful for driving a parallel LCD, keypad matrix, or multiple sensor interfaces without external port expanders. Industrial temperature grade (-40 to 85 °C) covers outdoor gateways, automotive cabin modules, and factory-floor sensor nodes where the ambient stays below the 85 °C ceiling.
EOL status — what it means for procurement
Texas Instruments has marked the MSP430BT5190IZQWT as obsolete. For existing designs, the remaining supply flows through independent surplus channels. Availability is lot-specific and confirmed at RFQ — date-code traceability and authenticity verification are part of the sourcing process.