Texas Instruments MSP430F6724AIPZR

Overview

MSP430F6724AIPZR from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase electronic watt-hour metering applications. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, three 16-bit timers, four eUSCI modules (three UART/IrDA/SPI and one I²C), LCD driver supporting up to 320 segments, and RTC with crystal offset calibration - all in a 100-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6724AIPZR datasheet, MSP430F6724AIPZR pinout, MSP430F6724AIPZR application, or MSP430F6724AIPZR equivalent, key selection criteria include its dual SD24_B ADC architecture for current/voltage channel separation, integrated auxiliary supply system for backup subsystem operation, low-power RTC modes (LPM3.5 at 1.24 µA), and metering-specific peripherals including SDCLK and SDxDIO pins for external sensor interfacing.

Technical Context

The MSP430F6724AIPZR implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL, REFO, VLO, and XT1 (32-kHz crystal) support, and programmable LDO core regulation. Its power management includes five low-power modes (LPM0–LPM4.5), with wake-up from LPM3 in 3 µs typical.

Peripherals are organized around metering-specific signal chains: two SD24_B converters accept differential PGA inputs for high-accuracy energy measurement, while the 10-bit ADC provides auxiliary sensing (temperature, supply monitoring). The device supports simultaneous multi-channel sampling via hardware DMA and features password-protected RTC with temperature compensation.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), body size 14 mm × 14 mm, RoHS-compliant, with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6723AIPZR and MSP430F6725AIPZR, the MSP430F6724AIPZR delivers optimal balance of Flash (96 KB) and cost for mid-tier single-phase meters - sufficient for DLMS/COSEM stack plus anti-tamper algorithms without over-provisioning memory.

Availability

MSP430F6724AIPZR is available at Aetrix Electronics and suitable for smart electricity metering, utility grid sensor nodes, energy monitoring gateways, and prepayment meter controllers requiring stable component supply and long-term industrial availability.

Supply support for MSP430F6724AIPZR 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 ultra-low-power microcontrollers for industrial and energy infrastructure.

The MSP430F672xA family is engineered specifically for revenue-grade energy measurement, integrating metrology-grade ADCs, tamper-resistant RTC, and LCD support to replace discrete metering subsystems with a single SoC solution.

FAQ

What is the maximum system clock frequency supported by the MSP430F6724AIPZR?

The MSP430F6724AIPZR supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its integrated FLL control loop and DCO oscillator. This allows real-time execution of complex metrology algorithms - such as RMS, harmonic analysis, and tariff switching - while maintaining sub-1% error margins. The device achieves this performance at ultra-low active-mode current (265 µA/MHz at 8 MHz, 3.0 V), making it suitable for battery-backed metering applications where computational throughput and power efficiency are both critical.

Does the MSP430F6724AIPZR support direct connection to shunt resistors or current transformers?

Yes, the MSP430F6724AIPZR supports direct connection to both shunt resistors and current transformers via its SD24_B analog front end. Pins SD0P0/SD0N0, SD1P0/SD1N0, and SD2P0/SD2N0 (pins 1–6) accept differential inputs with programmable PGA gain (1× to 32×), enabling high-resolution current measurement across a wide dynamic range. The device's built-in VeREF+/VeREF− inputs (pins 14–15) allow precise reference establishment, and its 24-bit resolution ensures >100-dB SNR - meeting IEC 62053-22 Class 0.5S requirements for revenue metering without external signal conditioning.

How does the auxiliary supply system (AUXVCC) function in the MSP430F6724AIPZR?

The MSP430F6724AIPZR features three dedicated auxiliary supply pins (AUXVCC1, AUXVCC2, AUXVCC3) that independently power the RTC, backup RAM, and LCD subsystems. This architecture allows the RTC to remain operational during main DVCC brownout or shutdown (LPM4.5), preserving timekeeping accuracy and enabling wake-up events based on calendar alarms. Each AUXVCC domain is internally regulated and isolated, ensuring metrology-critical functions continue uninterrupted - a requirement for utility-grade meters needing continuous time stamping and tamper-event logging even during power loss.

Can the MSP430F6724AIPZR drive a 320-segment LCD without external components?

Yes, the MSP430F6724AIPZR integrates a full-featured LCD_C peripheral supporting up to 320 segments in 8-mux configuration. It requires only a single external 2.2 µF capacitor on LCDCAP (pin 29) to stabilize the internal charge pump. All COM and SEG outputs are driven directly from the MCU - including COM0–COM7 (pins 32–41) and 256 segment outputs mapped across ports P1–P8 - eliminating the need for external LCD drivers, level shifters, or bias generators. This integration reduces bill-of-materials cost and PCB area while improving display reliability in harsh metering environments.

What communication interfaces are available on the MSP430F6724AIPZR for utility metering protocols?

The MSP430F6724AIPZR provides four enhanced universal serial communication interfaces: eUSCI_A0, eUSCI_A1, and eUSCI_A2 (each supporting UART, IrDA, and SPI), plus eUSCI_B0 (supporting I²C and SPI). This enables concurrent implementation of multiple utility protocols - for example, UART + IrDA for optical port communication (IEC 62056-21), I²C for secure element interfacing, and SPI for external flash or RF transceivers (e.g., TI CC1310). The eUSCI_A modules include hardware baud-rate auto-detection and IrDA pulse shaping, simplifying compliance with DLMS/COSEM and ANSI C12.18 optical port specifications.