Texas Instruments MSP430F477IPN

Overview

MSP430F477IPN from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with integrated 16-bit sigma-delta ADC, 12-bit DAC, dual 16-bit timers (Timer_A and Timer_B), two USCI modules (UART/I²C/SPI), LCD driver supporting up to 160 segments, and 32KB flash + 2KB RAM - designed for battery-powered metering and sensor applications requiring high-precision analog measurement and low standby current.

For engineers reviewing the MSP430F477IPN datasheet, MSP430F477IPN pinout, MSP430F477IPN application, or MSP430F477IPN equivalent, this page delivers verified technical context, exact package mapping (80-pin LQFP), validated pin functions, real-world use cases in energy metering and portable instrumentation, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The MSP430F477IPN implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) enabling sub-6 µs wake-up from LPM3. Its SD16_A module supports five differential analog inputs with internal reference, programmable gain, and up to 16-bit effective resolution at OSR=1024 - optimized for direct connection to shunt-based current sensors or thermocouples.

It integrates a dedicated LCD_A controller with regulated charge pump (LCDCAP/R33), four COM lines (COM0–COM3), and 48 segment outputs - supporting static, 2-, 3-, or 4-mux configurations without external bias circuitry. The dual USCI modules operate independently: USCI_A0 supports enhanced UART with auto-baud detection and IrDA, while USCI_B0 provides hardware I²C master/slave and synchronous SPI.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, exposed thermal pad not present, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F478IPN and MSP430F479IPN, the MSP430F477IPN offers optimal cost/performance balance for Class 0.5–1.0 meters and portable instruments where 32 KB flash suffices - avoiding over-provisioned memory that increases unit cost without design benefit.

Availability

MSP430F477IPN is available at Aetrix Electronics and suitable for energy metering, portable instrumentation, environmental monitoring, and digital thermostats requiring stable component supply across multi-year production cycles.

Supply support for MSP430F477IPN 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 leadership in ultra-low-power microcontrollers.

The MSP430F47x product line was engineered specifically for precision metering and sensor systems - integrating high-resolution sigma-delta ADCs, LCD drivers, and ultra-low-power operation to replace discrete metrology ASICs in utility and industrial applications.

FAQ

What is the maximum operating frequency of the MSP430F477IPN at 3.0 V?

The MSP430F477IPN supports a maximum system clock (MCLK) frequency of 8 MHz at VCC = 3.0 V, as specified in Section 5.3 of the SLAS629B datasheet. This limit applies when using the internal DCO or external XT2 oscillator. At lower voltages (e.g., 1.8 V), the max frequency reduces to 4.15 MHz to ensure timing compliance and stability across process/voltage/temperature corners.

Does the MSP430F477IPN support hardware I²C communication?

Yes, the MSP430F477IPN supports hardware I²C via USCI_B0 module, as confirmed in Section 1.1 Features and Section 5.43 (USCI I²C Mode) of the SLAS629B datasheet. It operates as both master and slave, supports standard-mode (100 kbps) and fast-mode (400 kbps) speeds, and includes automatic clock stretching and 7-bit/10-bit addressing - enabling direct connection to TI's TMP102, HDC1080, or other I²C sensors without bit-banging.

How many LCD segments can the MSP430F477IPN drive in 4-mux mode?

The MSP430F477IPN drives up to 160 LCD segments in 4-mux configuration, as stated in Section 1.1 Features and Section 5.19 (LCD_A). With four COM lines (COM0–COM3) and 40 segment outputs (S0–S39), it achieves 4 × 40 = 160 segments - sufficient for full-feature energy meter displays with tariff indicators, status icons, and numeric fields.

What is the typical active-mode current consumption of the MSP430F477IPN at 1 MHz and 2.2 V?

The typical active-mode current for the MSP430F477IPN is 262 µA at 1 MHz system clock and 2.2 V supply, per Section 5.4 (Supply Current) of the SLAS629B datasheet. This value assumes all peripherals disabled except CPU and basic clocks (MCLK/SMCLK = 1 MHz, ACLK = 32.768 kHz), and excludes external load currents - making it a reliable baseline for battery-life estimation in portable designs.

Is the MSP430F477IPN pin-compatible with other MSP430F47x variants in the PN package?

Yes, the MSP430F477IPN is fully pin-compatible with MSP430F478IPN and MSP430F479IPN in the 80-pin LQFP (PN) package, as confirmed in Table 3-1 (Device Comparison) and Section 4.1 (Pin Diagrams) of SLAS629B. All three share identical pin counts, mechanical footprint, signal assignments, and electrical characteristics - enabling one PCB design to support firmware-upgradable metering platforms.