Texas Instruments MSP430FR6037IPZR

Overview

MSP430FR6037IPZR from Texas Instruments is an ultrasonic sensing SoC MCU optimized for battery-powered water metering, featuring integrated Ultrasonic Sensing Solution (USS), 256KB FRAM, 8KB RAM, and <25-ps dTOF accuracy with 3-µA active measurement current at 1 Hz.

For engineers reviewing the MSP430FR6037IPZR datasheet, MSP430FR6037IPZR pinout, MSP430FR6037IPZR application, or MSP430FR6037IPZR equivalent, this page delivers verified technical context, real-world timing performance, low-power mode behavior, and validated alternative options for ISO 4064-compliant meter designs.

Technical Context

The MSP430FR6037IPZR implements a dedicated USS subsystem with programmable pulse generator (PPG), 4-Ω output driver PHY, PGA (–6.5 dB to 30.8 dB), and 12-bit sigma-delta SDHS ADC operating up to 8 Msps - all synchronized by a 68–80 MHz PLL for precise time-of-flight computation.

It integrates a Low-Energy Accelerator (LEA) executing 256-point complex FFT independently of the 16-MHz CPUXV2 core, enabling ultra-low-power signal processing in LPM3.5 (450 nA) while supporting MTIF pulse generation (≤1016 p/s) and 16-channel SAR ADC with window comparator.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm), thermally enhanced with exposed thermal pad; pin-compatible with MSP430FR604x/FR603x family variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR6047IPZR, the MSP430FR6037IPZR omits one eUSCI_A port but retains full USS and MTIF - making it optimal for standard residential meters. Against MSP430FR6035IPZR, it doubles FRAM capacity for extended firmware and consumption history without changing PCB layout or power design.

Availability

MSP430FR6037IPZR is available at Aetrix Electronics and suitable for ultrasonic water metering, heat metering, and liquid-level sensing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade deployments.

Supply support for MSP430FR6037IPZR 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 energy efficiency, reliability, and system integration.

The MSP430FR603x product line targets battery-operated utility metering applications, integrating ultrasonic sensing, low-energy acceleration, and FRAM to eliminate external timing, memory, and signal-conditioning components.

FAQ

What is the primary function of the MSP430FR6037IPZR in ultrasonic water metering systems?

The MSP430FR6037IPZR serves as a complete ultrasonic sensing SoC, performing time-of-flight measurement, flow calculation, data logging in FRAM, and pulse output via MTIF - all within a single chip consuming only 3 µA per measurement. Its integrated USS module replaces discrete analog front-ends, and the LEA accelerator enables real-time FFT processing without waking the CPU, directly supporting ISO 4064 Class C accuracy requirements in the MSP430FR6037IPZR.

Does the MSP430FR6037IPZR support direct connection to standard ultrasonic transducers?

Yes, the MSP430FR6037IPZR directly interfaces industry-standard ultrasonic transducers up to 2.5 MHz using its integrated USS PHY with 4-Ω low-impedance output drivers on CH0_OUT and CH1_OUT pins. The programmable pulse generator (PPG) configures burst patterns, while the PGA (–6.5 dB to 30.8 dB) and SDHS ADC condition and digitize returning echoes - eliminating external amplifiers or drivers in the MSP430FR6037IPZR design.

How does the MSP430FR6037IPZR achieve ultra-low-power operation in battery-powered meters?

The MSP430FR6037IPZR achieves ultra-low-power operation through multiple hardware features: LPM3.5 mode draws only 450 nA with RTC active, the USS subsystem operates autonomously during measurement bursts, and the LEA coprocessor handles FFT offline. With 3 µA average current at one measurement per second and FRAM's near-zero write energy, the MSP430FR6037IPZR enables >10-year battery life in sealed water meters without compromising accuracy or feature set.

What memory architecture does the MSP430FR6037IPZR use, and why is it advantageous for metering?

The MSP430FR6037IPZR uses 256 KB of ferroelectric RAM (FRAM), offering unified program/data/storage space with 10¹⁵ write endurance and 125 ns write speed. Unlike flash, FRAM allows frequent logging of hourly consumption data, calibration coefficients, and firmware updates without wear leveling or erase cycles - critical for long-life, maintenance-free water meters where the MSP430FR6037IPZR must reliably store decades of usage history.

Is the MSP430FR6037IPZR pin-compatible with other devices in the MSP430FR60xx family?

Yes, the MSP430FR6037IPZR is pin-compatible with all LQFP-100 variants in the MSP430FR603x/FR604x family, including MSP430FR6035IPZR, MSP430FR6047IPZR, and MSP430FR6045IPZR. Shared pin mapping for USS, MTIF, power, clocks, and I/O enables hardware reuse across accuracy tiers and memory configurations - allowing scalable design migration while maintaining the same PCB layout for the MSP430FR6037IPZR.