Texas Instruments MSP430F6746AIPZ

Overview

MSP430F6746AIPZ from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates four 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 16KB RAM, and LCD controller supporting up to 320 segments - enabling ANSI C12.20 and IEC 62053-compliant metering with <0.1% error over 2000:1 dynamic range.

For engineers reviewing the MSP430F6746AIPZ datasheet, MSP430F6746AIPZ pinout, MSP430F6746AIPZ application, or MSP430F6746AIPZ equivalent, key selection factors include its 100-pin LQFP (PZ) package, 4-channel SD24_B ADC configuration, RTC with tamper detection, AES-128 encryption, and support for current transformers, Rogowski coils, or shunt sensors in revenue-grade metering systems.

Technical Context

The MSP430F6746AIPZ implements a dedicated metrology subsystem with four independent 24-bit sigma-delta modulators feeding digital filters and calibration engines, each capable of phase-current measurement with digital phase correction. Its real-time clock operates in LPM3.5 at 0.34 µA and includes crystal offset calibration and temperature compensation for long-term accuracy.

Digital integration includes three-channel DMA, six eUSCI modules (four UART/IrDA/SPI-capable, two SPI/I²C-capable), four 16-bit timers with nine capture/compare registers, and hardware AES-128 for secure firmware and data protection - all operating across ultra-low-power modes including LPM4.5 (0.18 µA).

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch, with 62 general-purpose I/O pins and dedicated metrology analog inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar polyphase metering applications.

Compared with MSP430F6746AIPZ, the MSP430F6747AIPZ offers double the RAM for enhanced data buffering without altering metrology accuracy, power consumption, or pin compatibility - making it ideal for future-proofed meter designs requiring deeper analytics while maintaining identical hardware layout.

Availability

MSP430F6746AIPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and grid-edge energy monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F6746AIPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in low-power microcontrollers and precision metrology solutions.

The MSP430F67xxA product line was engineered specifically for revenue-grade energy measurement in utility and industrial metering - integrating metrology ADCs, secure processing, and ultra-low-power operation into a single SoC.

FAQ

What is the maximum number of independent 24-bit sigma-delta ADC channels supported by the MSP430F6746AIPZ?

The MSP430F6746AIPZ supports exactly four independent 24-bit sigma-delta ADC channels (SD24_B). This is confirmed in Table 3-1 of the SLAS982A datasheet, which lists "4" under the SD24_B CONVERTERS column for MSP430F6746AIPEU and MSP430F6746AIPZ variants. These channels provide differential inputs with programmable gain for voltage and current sensing in polyphase metering applications.

Does the MSP430F6746AIPZ include hardware AES encryption capability?

Yes, the MSP430F6746AIPZ includes a dedicated hardware AES-128 module. As stated in Section 1.1 "Features", it provides integrated security modules for anti-tamper and encryption. This accelerator offloads cryptographic operations from the CPU, enabling secure firmware updates and encrypted data transmission without performance penalty or external components.

What package type and pin count does the MSP430F6746AIPZ use?

The MSP430F6746AIPZ uses a 100-pin LQFP package designated as PZ, with dimensions of 14 mm × 14 mm and 0.5 mm pitch. This is explicitly documented in the Device Information table and Table 3-1 of the SLAS982A datasheet, where "100 PZ" is listed for all IPZ-suffixed variants including MSP430F6746AIPZ.

Can the MSP430F6746AIPZ operate across the full 40-Hz to 70-Hz line frequency range with a single calibration?

Yes, the MSP430F6746AIPZ supports 40-Hz to 70-Hz line frequency operation using a single calibration point, as specified in Section 1.1 "Features". This capability simplifies field deployment across global utility grids (e.g., 50 Hz in Europe, 60 Hz in North America) and accommodates frequency deviations during grid instability without recalibration.

How many general-purpose I/O pins are available on the MSP430F6746AIPZ in its 100-pin PZ package?

There are 62 general-purpose I/O pins available on the MSP430F6746AIPZ in the 100-pin PZ package. This value is directly specified in Table 3-1 of the SLAS982A datasheet under the "I/Os" column for all MSP430F674xAIPZ entries, confirming consistent I/O count across the PZ package family regardless of flash/RAM configuration.