Texas Instruments MSP430F6726IPZR

Overview

MSP430F6726IPZR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller designed for single-phase electronic watt-hour metering. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments, real-time clock with crystal offset calibration, and three eUSCI_A modules (UART/IrDA/SPI) plus one eUSCI_B module (I²C/SPI), operating from 1.8 V to 3.6 V with standby current as low as 1.7 µA.

For engineers reviewing the MSP430F6726IPZR datasheet, MSP430F6726IPZR pinout, MSP430F6726IPZR application, or MSP430F6726IPZR equivalent, this page delivers verified technical context, exact pin functions for the 100-pin LQFP package, key specifications including SD24_B channel count and RAM size, and validated alternative parts for metering-grade embedded designs.

Technical Context

The MSP430F6726IPZR implements a 16-bit RISC CPU with extended memory addressing and constant generators for optimized code efficiency in metering firmware. Its unified clock system includes FLL stabilization, VLO and REFO internal sources, and 32-kHz XT1 crystal support for RTC operation with temperature compensation.

It features a dedicated auxiliary supply subsystem (AUXVCC1–AUXVCC3) isolating the RTC, backup memory, and low-frequency oscillator from main power rails. The device supports hardware-accelerated energy measurement via three independent SD24_B channels - though only two are enabled in the MSP430F6726IPZR variant - and integrates a 3-channel DMA controller for autonomous ADC-to-memory transfers without CPU intervention.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, standard JEDEC footprint 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 MSP430F6726IPZR, the MSP430F6736IPZR adds metrology headroom for advanced harmonics analysis and multi-tariff storage, while the MSP430F6725IPZR trades RAM capacity for lower unit cost-both retain identical pin compatibility and peripheral feature set except memory and SD24_B channel enablement.

Availability

MSP430F6726IPZR is available at Aetrix Electronics and suitable for 2-wire metering, 3-wire metering, and tamper-resistant electricity meter designs requiring stable component supply, long-term lifecycle assurance, and TI-qualified production traceability.

Supply support for MSP430F6726IPZR 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 specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision measurement and low-power systems.

The MSP430F6726IPZR belongs to TI's ultra-low-power metering MCU product line, engineered specifically for ANSI C12.20 and IEC 62053-21 compliant electricity meters demanding high-accuracy sigma-delta conversion, secure timekeeping, and long-life battery operation.

FAQ

What is the maximum system clock frequency supported by the MSP430F6726IPZR?

The MSP430F6726IPZR supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its digitally controlled oscillator (DCO) and FLL circuitry. This speed allows real-time execution of metrology algorithms-including RMS, fundamental, and harmonic calculations-while maintaining sub-1% error across temperature and voltage ranges. The device achieves full performance at 3.0 V and scales down linearly at lower supply voltages.

Does the MSP430F6726IPZR include a hardware AES engine for secure firmware updates?

No, the MSP430F6726IPZR does not integrate a hardware AES encryption engine. It relies on software-based cryptographic libraries for secure boot and firmware authentication. However, it provides dedicated security features including password-protected JTAG access, RTC write protection, and flash segment locking to prevent unauthorized code execution or memory readout.

How many LCD segments can the MSP430F6726IPZR drive, and what mux configurations are supported?

The MSP430F6726IPZR drives up to 320 LCD segments in 8-mux mode, supporting common configurations such as 40-segment × 8-common or 80-segment × 4-common displays. Its integrated LCD_C module includes programmable contrast control, charge pump regulation, and automatic blink control-eliminating external bias components and reducing BOM count in utility meter front panels.

What is the function of the AUXVCC1, AUXVCC2, and AUXVCC3 pins on the MSP430F6726IPZR?

AUXVCC1, AUXVCC2, and AUXVCC3 provide isolated power domains for the backup subsystem: AUXVCC1 supplies the 32-kHz XT1 oscillator and RTC_C module; AUXVCC2 powers the 4×16-bit backup RAM; AUXVCC3 feeds the SD24_B reference circuitry. This separation ensures RTC operation and data retention during main supply interruption or brownout conditions.

Can the MSP430F6726IPZR operate from a single 3.3-V supply without external LDO regulation?

Yes, the MSP430F6726IPZR integrates a fully programmable on-chip LDO that regulates core voltage (VCORE) from a single 3.3-V input. The LDO supports dynamic voltage scaling (1.8 V to 3.0 V) and is configurable via PMM registers, enabling optimal trade-offs between performance and ultra-low-power operation without requiring external regulators.