Texas Instruments MSP430F6723IPNR

Overview

MSP430F6723IPNR 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 (up to 320 segments), real-time clock with crystal calibration, and three eUSCI_A modules supporting UART/IrDA/SPI. It operates from 1.8 V to 3.6 V and delivers 265 µA/MHz active current at 8 MHz.

For engineers reviewing the MSP430F6723IPNR datasheet, MSP430F6723IPNR pinout, MSP430F6723IPNR application, or MSP430F6723IPNR equivalent, this page provides verified functional specifications, package mapping to LQFP-80, confirmed metering-targeted peripherals, and validated alternative options for energy measurement designs requiring tamper resistance and high-accuracy analog front-end integration.

Technical Context

The MSP430F6723IPNR 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, low-frequency internal sources (VLO/REFO), and 32-kHz crystal support for RTC operation with temperature compensation.

It features a dedicated auxiliary supply subsystem (AUXVCC1–AUXVCC3) isolating the RTC, backup RAM (4×16 bits), and 32-kHz oscillator from main power rails-enabling accurate timekeeping during main supply brownout or shutdown. The SD24_B module supports differential PGA inputs with programmable gain for precision current/voltage sensing in 2-wire and 3-wire meter topologies.

Key Specifications

Pinout & Package

Package: LQFP-80 (PN suffix), 12 mm × 12 mm body, 0.5 mm pitch, 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 MSP430F6723IPNR, MSP430F6724IPNR offers expanded memory and ADC capability for multi-element metering, while MSP430F6721IPNR reduces cost and complexity for minimal-feature deployments-both maintain identical LQFP-80 pinout and core peripheral compatibility.

Availability

MSP430F6723IPNR is available at Aetrix Electronics and suitable for 2-wire metering, 3-wire metering, and tamper-resistant utility meter designs requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6723IPNR 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 low-power microcontrollers and precision analog signal chains.

The MSP430F672x product line is engineered specifically for revenue-grade electricity metering, integrating metrology-grade ADCs, RTC, LCD, and security features into a single ultra-low-power SoC architecture.

FAQ

What is the maximum system clock frequency supported by the MSP430F6723IPNR?

The MSP430F6723IPNR supports a maximum system clock frequency of 25 MHz, enabled by its digitally controlled oscillator (DCO) and FLL-based clock stabilization. This allows high-speed execution of metrology algorithms while maintaining timing accuracy across temperature and voltage variations. The device achieves 265 µA/MHz active current at 8 MHz, confirming efficient operation well below its 25-MHz ceiling. MSP430F6723IPNR uses this headroom for burst-mode computation during ADC conversion windows.

Does the MSP430F6723IPNR include an integrated LCD driver, and what is its segment capacity?

Yes, the MSP430F6723IPNR integrates the LCD_C controller supporting up to 320 segments in 8-mux configuration. It includes programmable contrast control, charge-pump voltage generation, and static/dynamic drive modes-all managed in hardware without CPU intervention. This eliminates the need for external display controllers in compact meter designs. MSP430F6723IPNR's LCD driver is fully compatible with common 4-digit, 7-segment + icon displays used in residential meters.

How many sigma-delta ADC channels does the MSP430F6723IPNR provide, and what are their key metrology capabilities?

The MSP430F6723IPNR integrates two independent 24-bit sigma-delta ADCs (SD24_B modules), each with differential PGA inputs, programmable gain (1–32×), and built-in offset/gain calibration registers. These support simultaneous voltage and current sampling with matched latency and phase response-critical for IEC 62053-22 Class 0.5S compliance. MSP430F6723IPNR does not include the third SD24_B channel found in MSP430F6726/IPNR.

What low-power modes are available on the MSP430F6723IPNR, and what is the lowest current draw?

The MSP430F6723IPNR offers five low-power modes: LPM0–LPM4 plus LPM3.5 and LPM4.5. Its lowest operational current is 0.78 µA in LPM4.5 (full RAM retention, supply supervisor active, RTC disabled), and 1.24 µA in LPM3.5 (RTC with 32-kHz crystal active). These modes enable multi-year battery life in backup operation and rapid 3-µs wake-up for event-driven metering tasks. MSP430F6723IPNR's power architecture is optimized for intermittent high-accuracy sampling followed by extended sleep.

Is the MSP430F6723IPNR pin-compatible with other devices in the MSP430F672x family?

Yes, all MSP430F672x devices in the LQFP-80 (PN) package-including MSP430F6720IPNR through MSP430F6726IPNR-are pin-compatible. Pin assignments for primary functions (I/O, power, clocks, reset, debug) are identical; differences exist only in secondary peripheral mappings (e.g., SD2P0/SD2N0 are NC on MSP430F6723IPNR but functional on MSP430F6726IPNR). This enables scalable design reuse across metering tiers without PCB redesign. MSP430F6723IPNR shares the same footprint and thermal pad layout as its family members.