What this chip is and where it fits
The Texas Instruments MSP430F6776IPEU is a 16-bit MCU from the MSP430F6xx family, built around the MSP430 CPUXV2 core clocked at 25 MHz. It carries 256 KB of Flash program memory and 16 KB of RAM, with 90 general-purpose I/O lines. The standout feature is the integrated 7-channel 24-bit sigma-delta ADC — that is what sets this part apart from the bulk of the MSP430 lineup and makes it a natural fit for polyphase energy metering, precision instrumentation, and industrial sensor front-ends where you need multiple high-resolution analog channels without an external converter. The peripheral set includes a brown-out detect and reset, DMA controller, LCD driver, POR, PWM, and watchdog timer. Communication interfaces cover I²C, IrDA, LIN, SPI, and UART/USART, so it can talk to most metrology AFEs, display modules, and host controllers over standard serial buses. It is rated for the industrial temperature range of -40 to 85°C, which covers factory-floor cabinets, outdoor telecom shelters, and commercial building automation panels. The 128-pin LQFP package (20×14 mm body) is a surface-mount part — not socket-friendly for field swaps, but standard for reflow assembly.
25 MHz core and the sigma-delta ADC — what the ratings mean
The 25 MHz CPU clock is enough to run the sigma-delta converter's digital filter and handle the math for energy calculations (active, reactive, apparent) in real time. If you are coming from an 8-bit MCU that struggles to keep up with a 24-bit ADC's data rate, this core gives you the headroom to do the post-processing on-chip without a separate DSP or FPGA. The 7×24-bit sigma-delta ADC is the reason to pick this part. Each channel can sample simultaneously — essential for polyphase metering where you need voltage and current from all phases at the same instant. The 8×10-bit auxiliary ADC handles the less demanding channels (temperature sense, DC offset checks) without tying up the sigma-delta inputs.
Lifecycle and sourcing
For volume procurement, this part is quoted to order against an RFQ. Current pricing and lead time are confirmed at quote time through independent distribution. There is no official pin-compatible second source listed for this exact order code, so dual-sourcing would require a design-in of a sibling from the MSP430F6xx family or a port to a different MCU architecture.