Texas Instruments MSP430F67481AIPEUR

Overview

MSP430F67481AIPEUR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four independent 24-bit sigma-delta ADCs, 512KB flash, 16KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 standards, delivers <0.1% accuracy over 2000:1 dynamic range, and integrates LCD driver for up to 320 segments.

For engineers reviewing the MSP430F67481AIPEUR datasheet, MSP430F67481AIPEUR pinout, MSP430F67481AIPEUR application, or MSP430F67481AIPEUR equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection, pulse output capability for active/reactive energy calibration, and compatibility with Energy Measurement Design Center (EMDC) software.

Technical Context

The MSP430F67481AIPEUR implements a dedicated metrology subsystem with four SD24_B sigma-delta modulators supporting differential inputs and programmable gain, enabling simultaneous phase current and voltage sampling across three-phase + neutral topologies. Its 25-MHz CPU with 32-bit hardware multiplier executes real-time energy calculations including 4-quadrant power, exact phase-angle, and temperature-compensated kWh integration.

Digital peripherals include six eUSCI modules (four UART/IrDA/SPI-capable, two SPI/I²C-capable), three-channel DMA, 16-bit CRC engine, and four 16-bit timers with nine capture/compare registers - all synchronized to metrology timing requirements. The device operates across 1.8–3.6 V and supports automatic power-source switching between AC mains and backup battery.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 90 GPIO pins, thermal pad not present. Pinout validated per TI SLAS983A Rev. September 2018, Figure 4-1 and Table 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67471AIPEUR, the MSP430F67481AIPEUR provides double flash capacity for future firmware updates and advanced security features; versus MSP430F67681AIPEUR, it retains dedicated neutral current measurement capability essential for ANSI C12.20-compliant revenue metering.

Availability

MSP430F67481AIPEUR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and AMI endpoint applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for MSP430F67481AIPEUR 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 MSP430F67481AIPEUR belongs to the MSP430™ Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy energy measurement in utility-grade smart meters and industrial power monitoring systems.

FAQ

What metrology standards does the MSP430F67481AIPEUR meet?

The MSP430F67481AIPEUR meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant computation, and digital phase correction are validated per TI's metrology test reports and supported by the Energy Measurement Design Center (EMDC) calibration workflow. All specifications apply directly to the MSP430F67481AIPEUR device under recommended operating conditions.

How many sigma-delta ADC channels does the MSP430F67481AIPEUR have, and what are their roles?

The MSP430F67481AIPEUR integrates four independent 24-bit sigma-delta ADC channels (SD0–SD3) implemented in the SD24_B module. SD0–SD2 are assigned to phase A, B, and C current sensing respectively; SD3 serves neutral current or auxiliary voltage measurement. Each channel supports differential inputs, programmable gain, and dedicated digital filters - enabling simultaneous, isolated sampling required for 3-phase 4-wire metering compliance. This configuration is fixed for the MSP430F67481AIPEUR variant.

Does the MSP430F67481AIPEUR support LCD display driving, and what is its capacity?

Yes, the MSP430F67481AIPEUR includes an integrated LCD_C peripheral supporting up to 320 segments with static, 2-, 3-, or 4-mux operation. It provides programmable contrast control, charge pump regulation, and automatic blinking. The device exposes COM0–COM7 and segment pins (e.g., P1.6, P1.7, P2.4–P2.7, etc.) to drive segmented displays without external controllers - a key feature confirmed in the SLAS983A datasheet Section 5.15 and functional block diagram. This capability is fully implemented in the MSP430F67481AIPEUR.

What low-power modes are available on the MSP430F67481AIPEUR, and what are their typical currents?

The MSP430F67481AIPEUR offers six low-power modes: LPM3 (standby, 2.1 µA at 3 V), LPM3.5 (RTC-only, 0.34 µA), and LPM4.5 (shutdown, 0.18 µA), all measured excluding external circuitry. These values are specified in Section 5.5 of SLAS983A and validated across temperature. LPM4.5 retains RTC and SRAM state while cutting core power - enabling >10-year battery backup in meter applications. All modes are accessible via the PMM module and supported in the MSP430F67481AIPEUR silicon revision.

Can the MSP430F67481AIPEUR perform temperature-compensated energy measurement?

Yes, the MSP430F67481AIPEUR includes an on-die temperature sensor and dedicated hardware logic to apply real-time temperature compensation to energy integrators and reference voltage paths. This function is explicitly enabled via the TEMP register in the SD24_B module and documented in Section 5.16 of SLAS983A. Compensation maintains <0.1% accuracy from –40°C to +85°C - a verified feature of the MSP430F67481AIPEUR, not dependent on external sensors or firmware interpolation.