Texas Instruments MSP430F6734AIPNR

Overview

MSP430F6734AIPNR from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for single-phase energy metering applications. It integrates three 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 eUSCI modules for UART, IrDA, SPI, and I²C. It operates from 1.8 V to 3.6 V and delivers 265 µA/MHz active current at 8 MHz, 3.0 V.

For engineers reviewing the MSP430F6734AIPNR datasheet, MSP430F6734AIPNR pinout, MSP430F6734AIPNR application, or MSP430F6734AIPNR equivalent, key selection criteria include its 96 KB flash / 4 KB RAM configuration, LQFP-80 package with 52 GPIOs, integrated metrology-grade ADCs, RTC with temperature compensation, and support for ANSI C12.22 and IEC 62056 compliance in utility meter designs.

Technical Context

The MSP430F6734AIPNR implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL, REFO, VLO, and 32-kHz XT1 crystal support, and a flexible power-management architecture with programmable LDO core regulation and multiple low-power modes (LPM3: 1.7 µA, LPM4: 1.6 µA, LPM4.5: 0.78 µA). Its auxiliary supply subsystem isolates the RTC and backup memory using dedicated voltage rails.

It features three independent 24-bit SD24_B ADCs with differential PGA inputs for simultaneous voltage, current, and neutral channel sampling in watt-hour meters, plus a separate 10-bit ADC with internal reference and temperature sensor for system monitoring. The device includes four 16-bit timers (one with three CC registers, three with two each), hardware multiplier, three-channel DMA, and password-protected RTC with crystal calibration.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6735AIPNR, the MSP430F6734AIPNR trades 32 KB flash for tighter cost control while retaining full metrology ADC count; versus MSP430F6724AIPNR, it adds the critical third 24-bit ADC channel required for ANSI C12.20-compliant neutral monitoring in split-phase installations.

Availability

MSP430F6734AIPNR is available at Aetrix Electronics and suitable for single-phase electronic watt-hour meters, utility smart meter endpoints, and industrial power quality analyzers requiring stable component supply across multi-year production cycles.

Supply support for MSP430F6734AIPNR 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 and embedded processing solutions, with over 50 years of innovation in low-power microcontrollers and precision analog front-ends.

The MSP430F673xA family is engineered specifically for revenue-grade energy metering, integrating metrology-optimized ADCs, RTC, LCD, and communication peripherals on a single die to reduce system complexity and certification effort.

FAQ

What is the maximum system clock frequency supported by the MSP430F6734AIPNR?

The MSP430F6734AIPNR supports a maximum system clock (MCLK) frequency of 25 MHz, enabled by its integrated FLL circuit and optimized for high-speed metrology computations such as harmonic analysis and digital filtering. This clock speed is fully validated across the specified operating voltage range (1.8 V to 3.6 V) and temperature range (–40°C to 85°C), and is used internally by the CPU, DMA, and peripheral modules including the 24-bit SD24_B ADCs and 10-bit ADC10_A.

Does the MSP430F6734AIPNR include hardware support for real-time clock calibration?

Yes, the MSP430F6734AIPNR includes password-protected RTC hardware with crystal offset calibration and temperature compensation. It uses internal temperature sensing and programmable trim values stored in TLV memory to adjust the 32-kHz XT1 oscillator frequency, achieving ±1 ppm accuracy over –40°C to 85°C. This capability is essential for ANSI C12.20 and IEC 62053-62 compliance in revenue metering applications.

How many 24-bit sigma-delta ADC channels does the MSP430F6734AIPNR integrate?

The MSP430F6734AIPNR integrates three independent 24-bit sigma-delta ADCs (SD24_B modules), each with differential PGA inputs and configurable gain. These are designated SD0, SD1, and SD2, and support simultaneous sampling for voltage, current, and neutral current measurement-meeting the hardware requirements for Class 0.2 single-phase watt-hour meters per IEC 62053-22.

What package type and pin count does the MSP430F6734AIPNR use?

The MSP430F6734AIPNR uses an 80-pin LQFP (PN) package with a 12 mm × 12 mm body size and 0.5 mm lead pitch. It provides 52 general-purpose I/O pins, including dedicated metrology analog inputs (SD0P0/SD0N0, SD1P0/SD1N0), LCD COM/SEG drivers, and eUSCI signal pins-all electrically and thermally qualified for industrial metering environments.

Can the MSP430F6734AIPNR drive an LCD display directly without external components?

Yes, the MSP430F6734AIPNR includes an integrated LCD_C module supporting up to 320 segments in 8-mux configuration, with programmable charge pump, contrast control, and blinking functionality. It drives standard static and multiplexed LCD glass directly-no external bias generator or capacitor network is required, reducing bill-of-materials cost and PCB area in compact meter designs.