Texas Instruments MSP430F6733AIPZR

Overview

MSP430F6733AIPZR from Texas Instruments is an ultra-low-power mixed-signal microcontroller designed for precision energy metering applications. It integrates three 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver supporting up to 320 segments, and real-time clock with crystal offset calibration - all in a 100-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6733AIPZR datasheet, MSP430F6733AIPZR pinout, MSP430F6733AIPZR application, or MSP430F6733AIPZR equivalent, key selection criteria include standby current (1.7 µA in LPM3), sigma-delta ADC channel count (3), flash size (64 KB), RAM (4 KB), and support for single-phase watt-hour metering compliance.

Technical Context

The MSP430F6733AIPZR implements a 16-bit RISC CPU with 25-MHz system clock capability and flexible power management including integrated LDO, supply supervision, and dual auxiliary power domains. Its unified clock system features FLL stabilization, VLO, REFO, and 32-kHz crystal support for RTC operation.

Peripherals include four eUSCI modules (three UART/IrDA/SPI-capable eUSCI_A and one I²C/SPI eUSCI_B), four 16-bit timers (one with three capture/compare registers, three with two each), hardware multiplier, three-channel DMA, and dedicated SD24_B ADC input pins with differential PGA support.

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 ultra-low-power metrology microcontroller applications.

Compared with MSP430F6733AIPZR, the MSP430F6734AIPZR and MSP430F6735AIPZR offer increased Flash (96 KB and 128 KB respectively) while retaining identical 24-bit ADC count, RTC functionality, and 100-pin LQFP packaging - enabling seamless migration paths without PCB redesign.

Availability

MSP430F6733AIPZR is available at Aetrix Electronics and suitable for single-phase watt-hour meters, utility AMI endpoints, and smart grid sensor nodes requiring stable component supply, long-lifecycle support, and metrology-grade accuracy certification.

Supply support for MSP430F6733AIPZR 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, embedded processing, and connectivity solutions with emphasis on power efficiency, reliability, and system-level integration.

The MSP430F673xA product line targets precision energy measurement systems, integrating metrology-grade ADCs, RTC, LCD drivers, and ultra-low-power operation to meet IEC 62053 and ANSI C12 standards for revenue-grade meters.

FAQ

What is the maximum system clock frequency supported by the MSP430F6733AIPZR?

The MSP430F6733AIPZR supports a maximum system clock frequency of 25 MHz, enabled by its integrated FLL control loop and DCO oscillator. This speed allows real-time execution of complex metrology algorithms - including RMS, fundamental, and harmonic calculations - while maintaining compatibility with the device's ultra-low-power architecture and 3 µs wake-up from LPM3.

Does the MSP430F6733AIPZR include hardware support for cryptographic operations?

The MSP430F6733AIPZR does not include dedicated cryptographic accelerators such as AES or SHA engines. However, it supports secure bootloading via its password-protected BSL and provides sufficient RAM (4 KB) and Flash (64 KB) to implement software-based AES-128 or ECDSA for firmware authentication and secure communication - commonly used in DLMS/COSEM-compliant metering deployments.

How many independent analog input channels does the MSP430F6733AIPZR support for metrology measurements?

The MSP430F6733AIPZR supports six external analog input channels for the 10-bit ADC and three fully differential pairs (six pins) for its three 24-bit sigma-delta ADCs (SD24_B). Combined with two internal channels (including temperature sensor), this enables simultaneous acquisition of voltage, current, neutral, and auxiliary signals - essential for Class 0.2 single-phase metering per IEC 62053-21.

Can the MSP430F6733AIPZR drive a segment LCD without external components?

Yes, the MSP430F6733AIPZR integrates a programmable LCD_C module capable of driving up to 320 segments in 8-mux configuration with internal charge pump and contrast control. No external bias resistors or capacitors are required beyond the mandatory LCDCAP pin capacitor (typically 2.2 µF), simplifying design and reducing bill-of-materials cost for utility meter displays.

What is the function of the AUXVCC1, AUXVCC2, and AUXVCC3 pins on the MSP430F6733AIPZR?

The AUXVCC1, AUXVCC2, and AUXVCC3 pins provide dedicated power supplies for the backup subsystem - isolating the RTC, 4×16-bit backup RAM, and 32-kHz oscillator from the main DVCC domain. This separation ensures continuous timekeeping and data retention during main power failure, a mandatory requirement for tamper-evident logging and time-of-use billing in revenue-grade meters.