16 MHz CPUXV2 core with 128 KB FRAM — what it means for a low-power design
Supply range and connectivity
Serial interfaces cover I²C, SPI, UART, and IrDA — enough for sensor hubs, industrial I/O nodes, or simple HMI panels.
Housed in a 64-pin VFQFN with an exposed pad (9x9 mm) — hand-solderable with a hot-air station if you're careful, but the pad under the package needs a thermal via pattern for good solder wetting.
Lifecycle reality — obsolete, but still sourced
TI lists the MSP430FR58891IRGCT as obsolete. That means no new factory orders — no last-time-buy window, no direct replenishment. If you need a production-ready alternative, check the MSP430FR58891's sibling variants in the same family — they share the same core and peripheral set, though pin compatibility varies by package option.