256 kB Flash, 16K x 8 RAM — Bluetooth stack headroom check
The MSP430BT5190IZCAT is a Texas Instruments Bluetooth microcontroller from the MSP430 series, built for embedded wireless applications where the 256 kB on-chip Flash must hold both the Bluetooth stack and the application firmware. The 16K x 8 RAM is the working memory for packet buffers and stack variables — a full BT stack with GATT and SPP profiles typically leaves 4–6 KB for application data, so the buffer budget needs sizing before committing the BOM line.
Active production — no LTB or NRND flags
Texas Instruments lists the MSP430BT5190IZCAT as Active with no last-time-buy or not-recommended-for-new-designs notice. ROHS3 compliant with no exemptions — fits EU and global RoHS requirements without a waiver.
Peripheral set — sensor and host comms
The interface set includes I²C, IrDA, SCI, SPI, and UART/USART — covers the common sensor buses (I²C, SPI) and host communication (UART for BT HCI transport, IrDA for legacy optical links). The SCI (Serial Communications Interface) is TI's name for the UART module with hardware flow control, useful for the Bluetooth HCI UART transport layer.