That means TI has stopped production, and no further factory orders can be placed. For an existing design that already qualifies this MCU, the remaining supply is what independent distributors hold in inventory or can source from surplus channels. Any new design-in should target a current-production MSP430 derivative — the MSP430F6xx family includes several pin-compatible and software-compatible options with similar sigma-delta ADC peripherals, though the exact replacement depends on the metrology firmware and the required number of converter channels.
Beyond the sigma-delta converters, the device integrates a brown-out detect/reset circuit, DMA controller, LCD driver, POR, PWM, and watchdog timer.