Texas Instruments MSP430FR2476TRHBT

Overview

MSP430FR2476TRHBT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 64KB FRAM, 8KB RAM, and integrated 12-bit ADC with 12 input channels. It operates from 1.8 V to 3.6 V, supports up to 16 MHz DCO clock, and delivers 135 µA/MHz active current - optimized for battery-powered sensing in industrial and medical edge devices.

For engineers reviewing the MSP430FR2476TRHBT datasheet, MSP430FR2476TRHBT pinout, MSP430FR2476TRHBT application, or MSP430FR2476TRHBT equivalent, key selection criteria include FRAM endurance (10¹⁵ writes), LPM3.5 RTC operation at 660 nA, pin-remappable eUSCI peripherals (2× UART/IrDA/SPI + 2× SPI/I²C), and 40-pin VQFN (RHA) package compatibility with thermal and layout constraints.

Technical Context

The MSP430FR2476TRHBT implements a digitally controlled oscillator (DCO) with FLL, ±1% accuracy at room temperature using on-chip reference, and supports multiple clock sources: 16-MHz DCO, 32-kHz REFO, 10-kHz VLO, and external LFXT crystal. Its clock system enables sub-10 µs wake-up from LPM modes.

It integrates four Timer_A3 modules (each with three capture/compare registers), one Timer_B7 (seven CCRs), a dedicated RTC counter, 16-bit CRC engine, and dual eUSCI_A/B modules with full pin remap capability - enabling flexible peripheral routing without PCB redesign.

Key Specifications

Pinout & Package

Package: 40-pin VQFN (RHA), 6 mm × 6 mm, thermally enhanced with exposed thermal pad. Pinout conforms to TI's standard MSP430FR247x RHA footprint, compatible with LP-MSP430FR2476 LaunchPad and MSP-TS430PT48A target board adapters.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2476TRHBT, the MSP430FR2475TRHBT reduces memory resources while maintaining identical low-power behavior and pin compatibility, whereas the MSP430FR2676TRHBT adds capacitive sensing at higher cost and complexity - making MSP430FR2476TRHBT the optimal balance for general-purpose industrial and medical sensing.

Availability

MSP430FR2476TRHBT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and battery management units requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR2476TRHBT 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 reliability, longevity, and design-in support.

The MSP430FR247x product line targets ultra-low-power sensing and measurement applications, combining FRAM technology with holistic power architecture to extend battery life while simplifying firmware development for industrial and medical edge devices.

FAQ

What is the maximum operating frequency of the MSP430FR2476TRHBT?

The MSP430FR2476TRHBT supports a maximum system clock frequency of 16 MHz via its digitally controlled oscillator (DCO) with frequency-locked loop (FLL). This frequency is achievable across the full operating voltage range (1.8 V to 3.6 V) and temperature range (–40°C to +105°C), with ±1% accuracy at room temperature using the on-chip reference. The MSP430FR2476TRHBT maintains this performance without external crystal dependency for main clock generation.

Does the MSP430FR2476TRHBT support hardware real-time clock (RTC) functionality in low-power mode?

Yes, the MSP430FR2476TRHBT includes a dedicated 16-bit RTC counter that remains fully operational in LPM3.5 mode with a 32768-Hz external crystal, consuming only 660 nA typical. This allows precise timekeeping and periodic wake-up scheduling without activating the CPU or other peripherals - a critical capability for battery-powered applications like environmental loggers and wearable health monitors using the MSP430FR2476TRHBT.

How many analog input channels does the 12-bit ADC in the MSP430FR2476TRHBT support?

The MSP430FR2476TRHBT integrates a single 12-bit SAR ADC supporting up to 12 analog input channels, selectable via the ADCCTL1 and ADCMCTL0 registers. Channel mapping includes P1.0–P1.7 (A0–A7), P4.3–P4.4 (A8–A9), P5.3–P5.4 (A10–A11), and internal references. The ADC achieves 200 ksps sample rate with built-in sample-and-hold, making it suitable for multi-sensor acquisition in applications such as industrial condition monitoring using the MSP430FR2476TRHBT.

What debug interface does the MSP430FR2476TRHBT use, and how many pins are required?

The MSP430FR2476TRHBT uses the Spy-Bi-Wire (SBW) interface for programming and debugging, requiring only two pins: RST/NMI/SBWTDIO (pin 2) and TEST/SBWTCK (pin 3). This 2-wire interface is electrically compatible with JTAG and supported by TI's MSP-FET, LaunchPad debuggers, and Code Composer Studio. No additional debug header or SWD pins are needed - simplifying board layout and reducing BOM count for designs based on the MSP430FR2476TRHBT.

Is the MSP430FR2476TRHBT pin-compatible with other members of the MSP430FR247x family in the same package?

Yes, the MSP430FR2476TRHBT is fully pin-compatible with the MSP430FR2475TRHBT in the 40-pin VQFN (RHA) package - sharing identical pin functions, electrical characteristics, and thermal pad layout. This allows direct substitution in existing designs when upgrading from 32KB to 64KB FRAM, provided firmware accommodates the increased memory map. However, it is not pin-compatible with the 48-pin PT or 32-pin RHB variants due to differing pin counts and signal allocations.