Texas Instruments MSP430FR2476TRHAT

Overview

MSP430FR2476TRHAT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 64KB FRAM, 8KB RAM, and a 12-bit ADC with 10 input channels. It operates from 1.8 V to 3.6 V, supports up to 16 MHz DCO clocking, and delivers 135 µA/MHz active current. It targets battery-powered industrial sensors and medical wearables requiring nonvolatile data logging at extended temperature (–40°C to 105°C).

For engineers reviewing the MSP430FR2476TRHAT datasheet, MSP430FR2476TRHAT pinout, MSP430FR2476TRHAT application, or MSP430FR2476TRHAT equivalent, key selection criteria include FRAM endurance (10¹⁵ writes), LPM3.5 RTC operation at 660 nA, eUSCI_A/B serial flexibility, and VQFN-40 package compatibility with space-constrained PCB layouts.

Technical Context

The MSP430FR2476TRHAT integrates a digitally controlled oscillator (DCO) with FLL for ±1% accuracy at room temperature and supports multiple clock sources: internal REFO (32 kHz), VLO (10 kHz), MODOSC, and external LFXT crystal. Its clock system enables fast wake-up (<10 µs) from low-power modes via programmable MCLK/SMCLK prescalers.

It features four Timer_A modules (each with three capture/compare registers), one Timer_B7 (seven CCRs), and dedicated RTC counter - all operating in LPM3.5. Analog subsystem includes a 12-bit SAR ADC (200 ksps sample rate, internal 1.5/2.0/2.5 V reference), enhanced comparator with programmable hysteresis, and integrated 6-bit DAC for reference generation.

Key Specifications

Pinout & Package

VQFN-40 package (6 mm × 6 mm, 0.4 mm pitch) with wettable flanks; thermal pad exposed on underside for enhanced heat dissipation in compact designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2475TRHA, the MSP430FR2476TRHAT provides double FRAM for robust firmware updates and long-term data retention; versus MSP430FR2676TRHAT, it omits CapTIvate hardware, reducing cost and power for non-touch applications while retaining identical analog and timing performance.

Availability

MSP430FR2476TRHAT is available at Aetrix Electronics and suitable for industrial sensor nodes, battery-pack monitors, and medical wearables requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR2476TRHAT 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 for industrial, automotive, and consumer markets.

The MSP430FR247x product line targets ultra-low-power sensing and measurement applications, emphasizing FRAM-based data integrity, extended temperature operation, and rapid development with LaunchPad™ and MSP430Ware™ toolchain support.

FAQ

What is the maximum operating frequency of the MSP430FR2476TRHAT?

The MSP430FR2476TRHAT supports a maximum system clock frequency of 16 MHz using its on-chip digitally controlled oscillator (DCO) with frequency-locked loop (FLL). This is confirmed in Section 1 Features and Section 8.12.3.2 of the SLASEO7C datasheet. The DCO achieves ±1% accuracy at room temperature with the internal reference, making it suitable for time-critical sensor sampling and communication tasks without requiring an external high-frequency crystal.

Does the MSP430FR2476TRHAT support external crystal oscillators?

Yes, the MSP430FR2476TRHAT supports external 32.768 kHz crystals via P2.0 (XOUT) and P2.1 (XIN) pins for precise real-time clock operation. This configuration is explicitly documented in Section 7.1 Pin Diagrams (Figure 7-2) and Section 8.12.3.1 (XT1 Crystal Oscillator). The crystal oscillator remains functional in LPM3.5 mode, enabling ultra-low-power timekeeping at 660 nA typical current draw.

How many ADC input channels does the MSP430FR2476TRHAT have?

The MSP430FR2476TRHAT has 10 configurable analog input channels for its 12-bit SAR ADC, as specified in Table 6-1 (Device Comparison) and Section 1 Features. This differs from the 48-pin TPT variant (12 channels) due to reduced pin count in the VQFN-40 package. All 10 channels are accessible on dedicated pins including P1.0–P1.7, P4.3–P4.4, and P5.3–P5.4, supporting simultaneous multi-sensor acquisition in space-constrained designs.

What debug interface does the MSP430FR2476TRHAT use?

The MSP430FR2476TRHAT uses the Spy-Bi-Wire (SBW) interface via RST/NMI/SBWTDIO (Pin 2) and TEST/SBWTCK (Pin 3) for programming and debugging. This two-wire interface is fully supported by TI's MSP-FET and LaunchPad™ development kits, as detailed in Section 9.7 of the datasheet. SBW eliminates the need for full 4-pin JTAG, saving board space while maintaining full flash read/write and real-time breakpoint capabilities.

Is the MSP430FR2476TRHAT pin-compatible with other members of the FR247x family?

Yes, the MSP430FR2476TRHAT is pin-compatible with the MSP430FR2475TRHA in the same VQFN-40 (RHA) package, sharing identical pin functions, electrical characteristics, and footprint. This is confirmed in Table 6-1 and Section 7.2 Pin Attributes. However, it is not pin-compatible with the 48-pin TPT or 32-pin RHB variants due to differing pin counts and signal allocations.