Texas Instruments MSP430F67671IPEU

Overview

MSP430F67671IPEU from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates six 24-bit sigma-delta ADCs, a 25-MHz ultra-low-power CPU with 32-bit multiplier, 256KB flash, 32KB RAM, LCD controller (320 segments), and dedicated pulse outputs for active/reactive energy calibration - enabling ANSI C12.20 and IEC 62053-compliant metering with <0.1% accuracy over 2000:1 dynamic range.

For engineers reviewing the MSP430F67671IPEU datasheet, MSP430F67671IPEU pinout, MSP430F67671IPEU application, or MSP430F67671IPEU equivalent, key selection criteria include its 128-pin LQFP (PEU) package with 90 GPIOs, support for current transformers/Rogowski coils/shunts, four-quadrant energy measurement per phase, digital phase correction, and RTC with crystal offset calibration - all critical for utility meter design, firmware validation, and certification testing.

Technical Context

The MSP430F67671IPEU implements TI's high-precision 24-bit sigma-delta modulator architecture across six independent ADC channels, each supporting differential inputs and programmable gain for simultaneous voltage/current sampling across three phases plus neutral. Its dedicated energy measurement engine executes TI's certified energy library in real time without host CPU intervention.

Power management includes five low-power modes (LPM0–LPM4.5), with LPM3.5 consuming only 0.34 µA at 3 V for RTC operation and LPM4.5 drawing 0.18 µA in shutdown - enabling extended backup runtime during AC mains failure while retaining critical metering state in backup RAM.

Key Specifications

Pinout & Package

The MSP430F67671IPEU is housed in a 128-pin LQFP (PEU) package with exposed thermal pad, optimized for meter PCB layouts requiring high analog signal integrity and EMI resilience. Pin functions are fully configurable via software mapping for eUSCI and timer modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F67691IPEU, the MSP430F67671IPEU trades flash capacity and one SD24_B channel for lower unit cost and identical metrology accuracy; versus MSP430F67671IPZ, it delivers full I/O and analog flexibility in a larger footprint - making it optimal for feature-rich, certification-ready meter platforms.

Availability

MSP430F67671IPEU is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI endpoint development requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade deployments.

Supply support for MSP430F67671IPEU 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 leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, energy efficiency, and system-level integration.

The MSP430F67671IPEU belongs to TI's polyphase metering SoC product line, engineered specifically to consolidate metrology, security, display, and communication functions into a single ultra-low-power chip for ANSI/IEC-certified utility meters.

FAQ

What metrology standards does the MSP430F67671IPEU support out of the box?

The MSP430F67671IPEU supports ANSI C12.20 Class 0.2 and IEC 62053-22 compliance through TI's pre-certified Energy Measurement Software Library, which runs natively on the device. Its 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated RTC ensure <0.1% error over 2000:1 dynamic range - meeting core requirements for revenue metering without external calibration hardware. The MSP430F67671IPEU achieves this using factory-trimmed parameters stored in TLV memory.

How many independent analog input channels does the MSP430F67671IPEU provide for current and voltage sensing?

The MSP430F67671IPEU integrates six independent 24-bit sigma-delta ADC modules (SD24_B), each with differential inputs and programmable gain. This supports simultaneous sampling of up to three phase currents, three phase voltages, and neutral current - or any combination totaling six differential pairs. Pins SD0P0/SD0N0 through SD3P0/SD3N0 and SD4P0/SD4N0 through SD6P0/SD6N0 are all functional on the MSP430F67671IPEU per TI's SLAS815D datasheet Table 4-1.

Does the MSP430F67671IPEU include hardware-based security features for anti-tampering?

Yes, the MSP430F67671IPEU includes dedicated hardware tamper detection circuitry with configurable inputs (e.g., RTC Tamper Detect pin), secure boot with password-protected flash, and AES-128 acceleration for encrypted communications. Upon tamper event detection, it triggers immediate secure memory wipe, disables debug interfaces, and asserts alert signals - satisfying IEC 62053-31 and ANSI C12.22 security mandates. These features are enabled and managed directly by the MSP430F67671IPEU's integrated security modules.

What is the lowest power consumption mode available on the MSP430F67671IPEU, and what functionality remains active?

The MSP430F67671IPEU achieves its lowest power state in LPM4.5 (shutdown mode) at 0.18 µA @ 3 V, where only VCORE and backup RAM retain state. In LPM3.5 (RTC mode), it consumes 0.34 µA @ 3 V while maintaining real-time clock operation, calendar functions, and alarm wake-up capability - essential for time-stamped energy logging during AC mains failure. Both modes preserve critical metrology data in battery-backed RAM without CPU intervention.

Can the MSP430F67671IPEU drive a large LCD display, and how many segments does it support?

Yes, the MSP430F67671IPEU includes an integrated LCD controller supporting up to 320 segments with programmable contrast control and multiplex ratios up to 1:8. It drives common (COM0–COM7) and segment (S0–S39) pins directly, enabling full-featured meter displays with tariff indicators, status icons, and numeric fields. In LPM3, the LCD operates at just 3 µA - allowing continuous display visibility during extended power outages using minimal backup capacitance. This capability is intrinsic to the MSP430F67671IPEU's LCD_C peripheral.