Texas Instruments MSP430F6748IPZR

Overview

MSP430F6748IPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 512KB flash, 16KB RAM, and <0.1% energy measurement accuracy over 2000:1 dynamic range. It supports ANSI C12.20 and IEC 62053 standards, operates from 1.8 V to 3.6 V, and delivers ultra-low-power operation down to 0.18 µA in LPM4.5 shutdown mode.

For engineers reviewing the MSP430F6748IPZR datasheet, MSP430F6748IPZR pinout, MSP430F6748IPZR application, or MSP430F6748IPZR equivalent, key selection considerations include its 100-pin LQFP (PZ) package, dedicated pulse output pins for active/reactive energy calibration, integrated AES-128 encryption, LCD driver supporting up to 320 segments, and support for current transformers, Rogowski coils, and shunt sensors in utility metering systems.

Technical Context

The MSP430F6748IPZR integrates seven peripheral modules critical for revenue-grade metering: four independent 24-bit SD24_B sigma-delta ADCs with differential inputs and programmable gain, a system 10-bit ADC with six external channels plus temperature/supply monitoring, hardware AES-128 encryption engine, real-time clock with crystal offset calibration and temperature compensation, and six enhanced eUSCI ports configurable as UART, SPI, or I²C interfaces.

Its power architecture includes dual auxiliary supply rails (AUXVCC1–AUXVCC3) for isolated analog subsystem operation, automatic supply switching between main and backup sources, and LCD operation at 3 µA in LPM3 during AC mains failure - enabling long-duration data retention and tamper-resilient timekeeping without external supervision.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6747IPZ, the MSP430F6748IPZR offers double flash capacity for future firmware upgrades and larger secure boot partitions; compared with MSP430F6768IPZ, it trades two SD24_B channels for identical flash/RAM but reduces die cost and power - making it optimal for cost-sensitive Class 0.2 meters where neutral monitoring is not mandated.

Availability

MSP430F6748IPZR is available at Aetrix Electronics and suitable for utility metering, industrial energy monitoring, and prepayment metering requiring stable component supply, long-term lifecycle support, and traceable sourcing for global regulatory compliance.

Supply support for MSP430F6748IPZR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The MSP430F674x family is part of TI's ultra-low-power metering SoC product line, engineered specifically for revenue-grade electric utility meters that demand metrology accuracy, security, and decades-long field reliability under harsh environmental conditions.

FAQ

What is the maximum dynamic range supported by the MSP430F6748IPZR for phase current measurement?

The MSP430F6748IPZR achieves <0.1% measurement accuracy over a 2000:1 dynamic range for phase current, validated per ANSI C12.20 and IEC 62053-22 standards. This performance is enabled by its four 24-bit sigma-delta ADCs with programmable gain and digital phase correction - allowing precise low-current standby load detection and high-current fault measurement within a single acquisition cycle without range switching.

Does the MSP430F6748IPZR support hardware-accelerated encryption?

Yes, the MSP430F6748IPZR includes a dedicated hardware AES-128 encryption module that operates independently of the CPU. This enables secure firmware updates, encrypted meter data transmission, and protected tamper event logs without consuming CPU cycles or exposing keys in software memory - a critical feature for ANSI C12.22 and DLMS/COSEM-compliant smart meter deployments.

What LCD segment count does the MSP430F6748IPZR driver support?

The MSP430F6748IPZR integrates an LCD controller supporting up to 320 segments with programmable contrast control and internal charge pump. It provides eight COM outputs (COM0–COM7) and 40 SEG lines (via multiplexed GPIO), enabling direct drive of large-format alphanumeric and icon-based utility meter displays without external segment drivers or boost converters.

How many independent sigma-delta ADCs are integrated in the MSP430F6748IPZR?

The MSP430F6748IPZR integrates four independent 24-bit SD24_B sigma-delta ADCs, each with differential inputs, programmable gain (1× to 32×), and built-in offset/gain calibration. These ADCs are optimized for simultaneous sampling of voltage and current channels in 3-phase + neutral meter topologies, delivering >100 dB SNR and enabling Class 0.2 accuracy without external precision op-amps or reference buffers.

What is the lowest power consumption mode of the MSP430F6748IPZR and its typical current draw?

The MSP430F6748IPZR achieves its lowest power state in LPM4.5 (shutdown mode) with a typical current draw of 0.18 µA at 3 V. In this mode, only the RTC and backup RAM remain powered via AUXVCC3, enabling decade-long battery-backed timekeeping and critical register retention - essential for maintaining billing integrity during extended AC mains outages in smart meter applications.