The MSP430F67481IPEUR carries an Obsolete product status. Because no pin-compatible direct replacement has been published by TI, a design migration to a current MSP430F6xx variant (such as the MSP430F67491 or MSP430F6779) may require firmware porting and PCB layout review — particularly around the 4x24b sigma-delta converter and LCD segment mapping. Dual-sourcing the obsolete part from spot inventory is the faster path for existing BOMs.
Peripheral set and application fit
The headline feature is the 4x24-bit Sigma-Delta converter array — four simultaneous high-resolution channels that directly digitise current and voltage transformer outputs in polyphase energy meters. The integrated LCD driver supports up to 160 segments, enough for a multi-line display showing kWh, V, A, and PF. The 25 MHz CPUXV2 core delivers 16-bit RISC throughput with a hardware multiplier for DSP-style accumulate operations common in metrology algorithms. 256 KB Flash and 32K x 8 RAM accommodate a full metering stack plus communication protocol handling (DLMS/COSEM, Modbus over UART, or simple I²C/SPI sensor polling).
Package and layout considerations
Housed in a 128-LQFP package with a 20x14 mm body (EIAJ LQFP-128), this is a surface-mount device. The exposed pad (if present on the die-attach flag) should be stitched to a ground plane via a thermal via array for junction temperature management, especially when the 4x sigma-delta ADCs and LCD driver are active simultaneously. Supply decoupling: one 100 nF ceramic per Vcc/Vdd pair, plus a 10 µF bulk cap near the main supply entry.