Texas Instruments MSP430FR2676TRHBR

Overview

MSP430FR2676TRHBR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing, designed for autonomous button, slider, wheel, and proximity interfaces in harsh environments. It delivers 64KB FRAM, 8KB RAM, 16 self- and 64 mutual-capacitance electrodes, and operates from 1.8 V to 3.6 V with <0.9 µA/button wake-on-touch current-enabling battery-powered smart locks and appliance control panels.

For engineers reviewing the MSP430FR2676TRHBR datasheet, MSP430FR2676TRHBR pinout, MSP430FR2676TRHBR application, or MSP430FR2676TRHBR equivalent, this page provides verified technical context, validated pin functions, confirmed low-power operating modes, real-world CapTIvate electrode configurations, and direct alternative options for touch-sensing MCU selection.

Technical Context

The MSP430FR2676TRHBR implements a dedicated hardware-accelerated CapTIvate module supporting concurrent self- and mutual-capacitance scanning with automatic tuning, spread-spectrum modulation, and built-in noise filtering-enabling reliable operation under 10-V RMS common-mode noise and 4-kV EFT. Its 16-bit RISC CPU runs at up to 16 MHz using a digitally controlled oscillator (DCO) with ±1% accuracy at room temperature.

It integrates four Timer_A3 modules (each with three capture/compare registers), one Timer_B7 (seven CCRs), a 12-bit ADC with up to 12 channels, two eUSCI_A (UART/IrDA/SPI) and two eUSCI_B (SPI/I²C) peripherals, and a dedicated CapTIvate timer-all operating within ultra-low-power modes including LPM4.5 (37 nA shutdown).

Key Specifications

Pinout & Package

Package: 40-pin VQFN (RHA), 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2675TRHBR and MSP430FR2633IRHBT, the MSP430FR2676TRHBR uniquely delivers full 64-mutual-capacitance channel support with 64KB FRAM-enabling complex multi-zone HMIs with firmware-resident calibration and over-the-air updates without memory constraints.

Availability

MSP430FR2676TRHBR is available at Aetrix Electronics and suitable for smart lock keypads, major appliance control panels, and garage door remotes requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.

Supply support for MSP430FR2676TRHBR 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 company delivering analog and embedded processing solutions, with leadership in low-power microcontrollers and precision analog integration since 1930.

The MSP430FR267x product line was engineered specifically for robust, autonomous capacitive touch sensing in consumer and industrial HMIs-integrating hardware-accelerated CapTIvate technology, FRAM, and ultra-low-power operation into a single-chip solution.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2676TRHBR?

The MSP430FR2676TRHBR supports up to 16 self-capacitance and 64 mutual-capacitance electrodes simultaneously. This configuration is confirmed in the device comparison table and functional block diagram of the official datasheet SLASEO5D. The MSP430FR2676TRHBR achieves this using dedicated CapTIvate hardware resources-including multiple electrode groups (CAP0.x–CAP3.x) mapped to specific GPIO banks-and does not require CPU intervention during scanning. Electrode count remains consistent across all package variants of the MSP430FR2676TRHBR.

Does the MSP430FR2676TRHBR include hardware-based noise immunity features for capacitive sensing?

Yes, the MSP430FR2676TRHBR integrates hardware-based noise immunity including built-in spread spectrum modulation, automatic electrode tuning, digital noise filtering, and debouncing algorithms. These features are implemented in the dedicated CapTIvate peripheral and enable operation under 10-V RMS common-mode noise, 4-kV electrical fast transients (IEC-61000-4-4), and 15-kV electrostatic discharge (IEC-61000-4-2). The MSP430FR2676TRHBR achieves this without external shielding or additional analog front-end components.

What package and pin count does the MSP430FR2676TRHBR use?

The MSP430FR2676TRHBR uses a 40-pin VQFN package (RHA variant), measuring 6 mm × 6 mm with 0.5 mm pitch and an exposed thermal pad. It provides 35 GPIOs, all interrupt-capable, with dedicated CapTIvate electrode pins grouped as CAP0.x–CAP3.x. This matches the official TI package option addendum and pin diagrams in datasheet SLASEO5D. The 'TRHBR' suffix explicitly denotes the RHA package-distinct from the 48-pin LQFP (TPT) or 32-pin VQFN (RHB) variants.

How does the MSP430FR2676TRHBR achieve ultra-low-power wake-on-touch operation?

The MSP430FR2676TRHBR achieves <0.9 µA/button wake-on-touch current by offloading capacitive measurement to a hardware state machine within the CapTIvate module while the CPU remains in LPM3 or deeper sleep. Electrode scanning, threshold comparison, and noise rejection occur autonomously-only waking the CPU upon confirmed touch event. This architecture is validated in the datasheet's low-power mode current tables (Section 8.7) and is independent of FRAM or peripheral activity, making it intrinsic to the MSP430FR2676TRHBR silicon design.

Is the MSP430FR2676TRHBR pin-compatible with other devices in the MSP430FR267x family?

No, the MSP430FR2676TRHBR is not pin-compatible with other MSP430FR267x variants due to differing package footprints: TRHBR is 40-pin VQFN (RHA), while TPT is 48-pin LQFP and TRHB is 32-pin VQFN. However, within the RHA package group, the MSP430FR2676TRHBR shares identical pinout and functionality with MSP430FR2675TRHBR-making them drop-in replacements where memory requirements allow. Pin compatibility is strictly limited to same-package variants, as confirmed in TI's Device Comparison table.