Texas Instruments MSP430F4793IPZ

Overview

MSP430F4793IPZ from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller designed for single-phase electricity metering. It integrates three 16-bit sigma-delta ADCs with differential PGA inputs, 60KB+256B flash, 2.5KB RAM, and an integrated 160-segment LCD driver. Its active-mode current is 280 μA at 1 MHz/2.2 V, and it supports five power-saving modes with wake-up in under 6 μs.

For engineers reviewing the MSP430F4793IPZ datasheet, MSP430F4793IPZ pinout, MSP430F4793IPZ application, or MSP430F4793IPZ equivalent, this device is selected for precision energy measurement systems requiring high-resolution analog acquisition, on-chip LCD control, low-voltage operation (1.8–3.6 V), and robust serial interface support including dual USCI_A (UART/IrDA/SPI) and dual USCI_B (I²C/SPI).

Technical Context

The MSP430F4793IPZ implements a 16-bit RISC CPU with constant generators and 62.5-ns instruction cycle time, paired with FLL+ clock system supporting XT1 (32.768 kHz), XT2 (up to 16 MHz), and DCO. Its sigma-delta ADC subsystem includes programmable gain amplifiers and differential input pairs on A0–A2 channels, each with dedicated reference and buffer configuration.

Peripherals include two 16-bit timers (Timer_A3 with three capture/compare registers; Timer_B3 with three capture/compare plus shadow registers), on-chip comparator, hardware multiplier (32×32), brownout detector, and supply voltage supervisor with programmable threshold. All I/O ports (P1–P5, P7–P10) support individually configurable pull-up/down resistors and interrupt capability.

Key Specifications

Pinout & Package

100-pin plastic QFP (PZ package), RoHS-compliant, with 0.5 mm pitch and exposed thermal pad. Pin functions validated per SLAS545C Rev. March 2011.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F4794IPZ, the MSP430F4793IPZ saves cost by omitting the fourth ADC while retaining identical timing, LCD, and communication capabilities; versus MSP430F6736IPZ, it trades resolution and processing headroom for proven field reliability and lower power in established single-phase meter platforms.

Availability

MSP430F4793IPZ is available at Aetrix Electronics and suitable for single-phase electricity metering, energy data logging, and smart grid sensor node applications requiring stable component supply, long-term lifecycle support, and TI-qualified metrology performance.

Supply support for MSP430F4793IPZ 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 connectivity technologies, with decades of utility-grade metrology IC development.

The MSP430F47xx product line was engineered specifically for ANSI C12.20 and IEC 62053-compliant electricity meters, integrating metrology-grade ADCs, LCD drivers, and ultra-low-power operation into a single chip.

FAQ

What is the maximum operating frequency of the MSP430F4793IPZ CPU?

The MSP430F4793IPZ CPU operates at up to 16 MHz using the XT2 oscillator or FLL+-stabilized DCO. Its 62.5-ns instruction cycle time enables deterministic execution of metrology algorithms such as RMS calculation and harmonic analysis within strict timing windows required by ANSI C12.20 standards. The MSP430F4793IPZ achieves this while maintaining sub-μA standby current.

Does the MSP430F4793IPZ support external crystal oscillators?

Yes, the MSP430F4793IPZ supports two external crystals: a 32.768-kHz watch crystal on XIN/XOUT for real-time clock and low-power timing, and a high-frequency crystal (up to 16 MHz) on XT2IN/XT2OUT for main system clock. Both are managed by the integrated FLL+ module, which locks the DCO to maintain stability across voltage and temperature variations in meter environments.

How many LCD segments can the MSP430F4793IPZ drive, and what mux configurations are supported?

The MSP430F4793IPZ drives up to 160 segments using its integrated LCD_A module with COM0–COM3 backplane outputs. It supports 1-, 2-, 3-, and 4-mux configurations, enabling flexible display layouts for kWh readouts, tariff indicators, and status icons in utility meters. Contrast is digitally adjustable via internal charge pump control registers in the MSP430F4793IPZ.

What are the key differences between MSP430F4793IPZ and MSP430F4783IPZ?

The MSP430F4793IPZ features 60KB+256B flash and 2.5KB RAM versus 48KB+256B flash and 2KB RAM in the MSP430F4783IPZ; both include three sigma-delta ADCs and identical peripherals. The larger memory in MSP430F4793IPZ accommodates advanced tariff schemes, firmware-over-the-air updates, and extended data logging buffers in modern smart meters.

Is the MSP430F4793IPZ pin-compatible with other devices in the MSP430F47x3 family?

Yes, the MSP430F4793IPZ shares the same 100-pin PZ QFP package and pinout with MSP430F4783IPZ, MSP430F4784IPZ, and MSP430F4794IPZ. This allows hardware reuse across meter variants - for example, a single PCB can support both 3-ADC (MSP430F4793IPZ) and 4-ADC (MSP430F4794IPZ) configurations through firmware and BOM changes only.