What the MSP430F6748IPZR brings to a metering or instrumentation BOM
What sets it apart from general-purpose MSP430 parts is the integrated 4x24-bit sigma-delta ADC array and a direct LCD driver — these peripherals let a single chip handle analog front-end sampling and a local display, cutting the BOM count for a smart meter or panel instrument.
The 25 MHz clock rate is modest by today's 32-bit MCU standards, but the CPUXV2 architecture is a 16-bit RISC with a three-stage pipeline and hardware multiplier, so it handles 24-bit math from the sigma-delta ADCs efficiently. The 62 I/O pins give room for external memory, serial interfaces, and control lines alongside the LCD segment drive. The internal oscillator trims the BOM by one external crystal for non-critical timing; if you need a precision timebase for the ADC sampling window, you still add a crystal on the LFXT1 pins.
The 100-LQFP package with a 14x14 mm body is a hand-solderable QFP with 0.5 mm pitch — reworkable with hot air if you preheat the board, but the fine pitch means a steady hand and flux. No exposed thermal pad; junction temperature rise is modest at the 25 MHz clock, so a standard four-layer board with a ground plane under the package is sufficient.
TI has marked the MSP430F6748IPZR as obsolete.