Texas Instruments MSP430F6730AIPN

Overview

MSP430F6730AIPN from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase electronic watt-hour metering. It integrates three 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments, and three eUSCI_A modules (UART/IrDA/SPI) plus one eUSCI_B (I²C/SPI), all operating from 1.8 V to 3.6 V with standby current as low as 1.7 µA.

For engineers reviewing the MSP430F6730AIPN datasheet, MSP430F6730AIPN pinout, MSP430F6730AIPN application, or MSP430F6730AIPN equivalent, key selection criteria include its 16 KB Flash/1 KB RAM configuration, 80-pin LQFP package, RTC with crystal offset calibration, auxiliary supply subsystem for backup operation, and dedicated metrology-grade analog front-end for precision energy measurement.

Technical Context

The MSP430F6730AIPN implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL stabilization, VLO and REFO internal sources, and XT1 32-kHz crystal support. Its power architecture includes an integrated LDO with programmable core voltage, dual auxiliary supplies (AUXVCC1–3), and four low-power modes (LPM0–LPM4.5) enabling sub-µA shutdown states.

Peripherals are optimized for metering: SD24_B converters support differential PGA inputs for current/voltage sensing; ADC10_A provides six external and two internal channels (including temperature sensor); DMA enables autonomous data movement; and the password-protected RTC supports temperature-compensated timekeeping with crystal calibration-critical for revenue-grade time-of-use billing.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, 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 metrology microcontroller applications.

Compared with MSP430F6731AIPN, the MSP430F6730AIPN trades Flash/RAM headroom for lower BOM cost in fixed-function meters; versus MSP430F6720AIPN, it adds a third SD24_B channel essential for IEC 62053-22-compliant neutral current detection in TN-C-S systems.

Availability

MSP430F6730AIPN is available at Aetrix Electronics and suitable for single-phase metering, utility grid monitoring, and smart energy gateway applications requiring stable component supply, long-lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F6730AIPN 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 delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The MSP430F673xA family targets precision energy measurement systems, integrating metrology-grade ADCs, RTC, LCD, and low-power peripherals to replace discrete metering ASICs with flexible firmware-defined functionality.

FAQ

What is the maximum system clock frequency supported by the MSP430F6730AIPN?

The MSP430F6730AIPN supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its integrated FLL control loop and DCO oscillator. This allows high-speed execution of metrology algorithms while maintaining ultra-low power consumption in active mode (265 µA/MHz at 8 MHz). The device achieves fast wake-up from standby mode in 3 µs, ensuring responsive real-time sampling without latency penalties.

Does the MSP430F6730AIPN include hardware support for energy calculation functions?

Yes, the MSP430F6730AIPN includes a 32-bit hardware multiplier (MPY32) that accelerates fixed-point arithmetic for RMS, active/reactive power, and energy accumulation. Combined with three independent SD24_B ADCs and DMA-driven data transfer, it enables cycle-accurate computation without CPU intervention. The MSP430F6730AIPN does not include dedicated energy calculation accelerators like some higher-tier metering MCUs, but its architecture is optimized for efficient firmware implementation of IEC 62053-compliant algorithms.

How many LCD segments can the MSP430F6730AIPN drive, and what multiplexing configurations are supported?

The MSP430F6730AIPN integrates the LCD_C peripheral supporting up to 320 segments in 8-mux mode. It provides eight COM outputs (COM0–COM7) and 40 SEG outputs (via P1–P8 ports), enabling configurations from 2-mux (160 segments) to 8-mux (320 segments). Contrast is software-adjustable through internal charge pump control registers, eliminating external potentiometers. The MSP430F6730AIPN requires an external 2.2 µF capacitor on LCDCAP (Pin 29) for stable charge pump operation.

What are the key differences between the MSP430F6730AIPN and MSP430F6730AIPZ packages?

The MSP430F6730AIPN uses an 80-pin LQFP package (12 mm × 12 mm), providing 52 GPIO pins, while the MSP430F6730AIPZ is a 100-pin LQFP (14 mm × 14 mm) offering 72 GPIO pins. Both share identical electrical specifications and peripheral sets, but the PN variant omits pins SD2P0/SD2N0 (pins 5–6), P9.x (pins 11–13), and several segment/com drivers. The MSP430F6730AIPN is optimized for space-constrained meter designs where full I/O count is unnecessary, reducing PCB area and assembly cost.

Can the MSP430F6730AIPN operate from a single 3.3-V supply, and how is analog/digital isolation maintained?

Yes, the MSP430F6730AIPN operates from a single 3.3-V supply applied to DVCC, with AVCC derived internally via the integrated LDO or externally regulated. Analog and digital domains are isolated through separate power pins (AVCC/AVSS and DVCC/DVSS), mandatory decoupling capacitors (100 nF AVCC-to-AVSS, 100 nF DVCC-to-DVSS), and physical separation of analog/digital traces on PCB. The MSP430F6730AIPN datasheet specifies strict layout guidelines-including guard rings around SD24_B inputs and avoidance of digital switching near analog pins-to maintain >80 dB PSRR and prevent noise coupling into metrology measurements.