Texas Instruments MSP430F47173IPZR

Overview

MSP430F47173IPZR from Texas Instruments is an ultralow-power mixed-signal microcontroller designed for precision electricity metering applications. It integrates 92KB Flash, 8KB RAM, three 16-bit sigma-delta ADCs with differential PGA inputs, a 16-bit RISC CPU, integrated LCD driver (160 segments), and four USCI modules supporting UART, IrDA, SPI, and I²C - enabling single-phase and poly-phase watt-hour meter designs.

For engineers reviewing the MSP430F47173IPZR datasheet, MSP430F47173IPZR pinout, MSP430F47173IPZR application, or MSP430F47173IPZR equivalent, key selection criteria include its 3-channel SD16_A ADC architecture, 100-pin QFP package with dedicated analog input pairs (A0–A2), real-time clock capability via Basic Timer, and support for E-meter reference design SLAA409.

Technical Context

The MSP430F47173IPZR implements a 16-bit RISC CPU with constant generators and 62.5-ns instruction cycle time, paired with five software-selectable low-power modes (LPM0–LPM4) and wake-up from standby in under 6 µs. Its SD16_A module provides three independent 16-bit sigma-delta converters, each with differential inputs and programmable gain, directly mapped to pins A0.0±, A1.0±, and A2.0±.

Peripherals include dual 16-bit timers (Timer_A3 and Timer_B3), three-channel DMA, hardware multiplier (32×32), on-chip comparator, supply voltage supervisor with programmable threshold, and JTAG/EEM for on-chip emulation. The device uses separate analog (AVCC/AVSS) and digital (DVCC/DVSS) power domains with strict sequencing requirements.

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flatpack (QFP), PZ package, surface-mount, RoHS-compliant. Pin pitch: 0.5 mm. Thermal pad not present. Requires controlled-impedance PCB layout for XT2 crystal (1–8 MHz) and analog input routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with MSP430F47163IPZR, the MSP430F47173IPZR provides double the RAM for real-time harmonic computation buffers; compared with MSP430F47183IPZR, it trades 24KB Flash for lower unit cost while retaining identical metrology performance and peripheral configuration.

Availability

MSP430F47173IPZR is available at Aetrix Electronics and suitable for electricity metering, portable instrumentation, and smart grid edge-node applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MSP430F47173IPZR 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 power management technologies with over 50 years of innovation in industrial and energy infrastructure solutions.

The MSP430F471xx product line was engineered specifically for revenue-grade electricity metering, integrating metrology-optimized ADCs, low-power RTC, and LCD drivers to reduce system-level BOM and simplify IEC/ANSI certification.

FAQ

What is the maximum sampling rate supported by the SD16_A module in MSP430F47173IPZR?

The SD16_A module in MSP430F47173IPZR supports up to 8 kSPS per channel in continuous conversion mode with oversampling ratio (OSR) configured for 16-bit effective resolution. This rate is sufficient for IEC 62053-22 Class 0.2 metering at 50/60 Hz with 128× OSR, and is synchronized across all three channels using the module's internal timing control - ensuring phase-coherent acquisition critical for power factor accuracy.

Does MSP430F47173IPZR support external crystal oscillators for both low-frequency and high-frequency operation?

Yes, MSP430F47173IPZR supports two crystal oscillators: XT1 (32.768 kHz watch crystal on XIN/XOUT) for ACLK and real-time clock functions, and XT2 (1–8 MHz standard crystal on XT2IN/XT2OUT) for MCLK and SMCLK generation. Both are fully integrated with FLL+ loop control, enabling precise frequency synthesis and automatic failover to DCO if either crystal stops - a requirement for utility-grade meter reliability.

How does the power supply sequencing requirement affect system design for MSP430F47173IPZR?

MSP430F47173IPZR requires AVCC to power up after DVCC1/DVCC2 to prevent latch-up and ensure ADC accuracy. This sequencing must be enforced via discrete RC delay or dedicated power-supply sequencer IC. Failure to observe this causes undefined behavior in SD16_A conversion results and may trigger SVS faults - verified in TI application report SLAA409 section 4.2 for E-meter reference designs.

Can MSP430F47173IPZR drive a 4-mux LCD without external bias circuitry?

Yes, MSP430F47173IPZR's integrated LCD_A module supports static, 2-, 3-, and 4-mux configurations up to 160 segments using internal charge pump and contrast control registers. For 4-mux operation, it generates VLCD from DVCC via internal resistor ladder and supports software-adjustable bias voltage (VLCD = 2.4–3.3 V), eliminating external LCD bias ICs and reducing component count in meter front panels.

Is the JTAG interface on MSP430F47173IPZR usable for production programming, or only for development?

The JTAG interface on MSP430F47173IPZR supports both development debugging and production programming via tools like MSP-GANG430 gang programmer. It enables full Flash/RAM access, security fuse programming, and boundary-scan testing - making it suitable for high-volume manufacturing. TI confirms JTAG functionality remains accessible even after security fuse is blown, provided the fuse is not set to disable JTAG entirely (SLAU056 Chapter 2.4).