Texas Instruments MSP430FR60371IPZR

Overview

MSP430FR60371IPZR from Texas Instruments is an ultrasonic sensing system-on-chip (SoC) microcontroller optimized for battery-powered water metering. It integrates a programmable pulse generator (PPG), 4-Ω output driver PHY, <5-ps time measurement resolution, 12-bit sigma-delta ADC (SDHS) at 8 Msps, and low-energy accelerator (LEA) for FFT-based flow computation - enabling <1 L/h detection with ~3 µA average current per measurement.

For engineers reviewing the MSP430FR60371IPZR datasheet, MSP430FR60371IPZR pinout, MSP430FR60371IPZR application, or MSP430FR60371IPZR equivalent, key selection criteria include ultrasonic time-of-flight accuracy (<25 ps dTOF), ISO 4064/EN 1434 compliance, FRAM endurance (10¹⁵ cycles), MTIF pulse generation capability (1016 p/s), and LPM3.5 RTC operation at 450 nA.

Technical Context

The MSP430FR60371IPZR implements a dedicated ultrasonic sensing subsystem (USS) with hardware-accelerated signal acquisition and processing: PPG excites transducers up to 2.5 MHz; PHY provides impedance-matched 4-Ω drive; PGA offers –6.5 dB to 30.8 dB gain; SDHS ADC delivers 8 Msps sampling with differential input support. The LEA executes 256-point complex FFT independently of CPU, accelerating flow calculation by up to 40× versus Cortex-M0+.

It operates across 1.8–3.6 V, supports LPM3.5 (450 nA with RTC) and LPM4.5 (30 nA shutdown), and embeds 256 KB FRAM + 8 KB RAM (4 KB shared with LEA). Unlike MSP430FR604x variants, it lacks USSXT (ultrasonic transducer interface extension), confirming its role in cost-optimized, single-transducer water meter designs.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm), RoHS-compliant, with exposed thermal pad. Pin functions validated per TI SLASEB7D Rev. D (December 2020), Figure 7-2 (MSP430FR603xPZ).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrasonic sensing applications.

Compared with MSP430FR6037IPZR and MSP430FR6035IPZR, the MSP430FR60371IPZR provides I²C bootloader support for secure, two-wire field updates and double the FRAM capacity - enabling longer data retention, advanced diagnostics, and future firmware scalability without hardware redesign.

Availability

MSP430FR60371IPZR is available at Aetrix Electronics and suitable for ultrasonic water metering, smart heat metering, liquid level sensing, and water leak detection requiring stable component supply across multi-year deployments.

Supply support for MSP430FR60371IPZR 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 for industrial, automotive, and consumer applications.

The MSP430FR603x product line targets battery-operated utility metering, integrating ultrasonic sensing, FRAM, and ultra-low-power operation to replace mechanical meters with certified digital alternatives.

FAQ

What is the primary metrological certification supported by the MSP430FR60371IPZR?

The MSP430FR60371IPZR is designed to meet and exceed ISO 4064, OIML R49, and EN 1434 accuracy standards for water metering. Its <25-ps differential time-of-flight accuracy, programmable gain amplifier, and temperature-compensated ultrasonic signal chain enable Class C (±0.5%) performance across wide flow ranges - verified in TI reference designs and third-party test reports aligned with these standards. This makes MSP430FR60371IPZR suitable for revenue-grade metering in regulated utility markets.

Does the MSP430FR60371IPZR include the USSXT (ultrasonic transducer extension) module?

No, the MSP430FR60371IPZR does not include the USSXT module. Per TI's Device Comparison Table 6-1 (SLASEB7D), USSXT is present only in MSP430FR604x variants (e.g., MSP430FR60471IPZR) and explicitly omitted from all MSP430FR603x devices including MSP430FR60371IPZR. This reflects its target use case: cost-optimized, single-transducer water meters where full USSXT features (e.g., multi-frequency burst control, advanced impedance matching) are unnecessary.

What is the maximum ultrasonic transducer frequency supported by the MSP430FR60371IPZR?

The MSP430FR60371IPZR supports standard ultrasonic sensors operating up to 2.5 MHz, as confirmed in Section 1 Features and Section 3 Description of the official datasheet (SLASEB7D). Its programmable pulse generator (PPG) and 4-Ω PHY output driver are optimized for excitation and reception at this frequency, enabling precise time-of-flight measurement in water-filled pipes with minimal signal attenuation and phase distortion.

How does the MTIF module in the MSP430FR60371IPZR support utility billing compliance?

The MTIF module in the MSP430FR60371IPZR generates flow-proportional pulses up to 1016 pulses per second with a 16-bit counter (65535 max), fully compliant with EN 1434 pulse-output requirements for Class C meters. Its operation in LPM3.5 at 200 nA (typical) ensures continuous pulse generation without compromising battery life. MSP430FR60371IPZR's MTIF is hardware-synchronized with ultrasonic measurements, guaranteeing metrologically traceable pulse timing - essential for utility billing validation.

What is the role of the Low-Energy Accelerator (LEA) in ultrasonic flow computation on the MSP430FR60371IPZR?

The LEA in the MSP430FR60371IPZR performs hardware-accelerated 256-point complex FFT on digitized ultrasonic echo waveforms, executing up to 40× faster than the CPU alone. This offloads intensive DSP tasks - such as spectral analysis for noise rejection and zero-flow drift correction - reducing active-mode CPU time and lowering overall system power. As a result, MSP430FR60371IPZR achieves sub-liter-per-hour detection while maintaining ~3 µA average current per measurement cycle.