Texas Instruments MSP430FR2675TRHAT

Overview

MSP430FR2675TRHAT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with integrated CapTIvate™ capacitive touch sensing engine, supporting up to 16 self-capacitive and 64 mutual-capacitive electrodes. It features 32KB program FRAM, 6KB RAM, and operates from 1.8 V to 3.6 V with active current of 135 µA/MHz. Designed for robust human-machine interface (HMI) in appliances and smart locks, it delivers wake-on-touch at <0.9 µA/button while maintaining IEC-61000-4-2/4-4/4-6 compliance.

For engineers reviewing the MSP430FR2675TRHAT datasheet, MSP430FR2675TRHAT pinout, MSP430FR2675TRHAT application, or MSP430FR2675TRHAT equivalent, key selection criteria include its 40-pin VQFN (RHA) package, hardware-accelerated touch scanning with four simultaneous scans, support for metal/water-rejecting designs, and autonomous operation in LPM3/LPM4 with CapTIvate active while CPU sleeps.

Technical Context

The MSP430FR2675TRHAT integrates a dedicated CapTIvate timing module synchronized with Timer_A3 and Timer_B7, enabling concurrent self- and mutual-capacitance electrode scanning without CPU intervention. Its hardware state machine handles spread-spectrum modulation, automatic tuning, noise filtering, and debouncing - all while the CPU remains in LPM3 or deeper sleep modes.

Capacitive sensing is implemented via programmable charge-transfer circuits with configurable excitation sources and integrated 12-bit ADC for signal digitization. The device supports electrode capacitance range of 0–300 pF and achieves high-resolution slider operation up to 1024 points using differential measurement techniques and built-in ECC-protected FRAM for firmware storage and runtime calibration data.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2676TRHAT, the MSP430FR2675TRHAT trades memory headroom for identical touch performance in a smaller footprint; compared with MSP430FR2675TPT, it offers identical functionality in a space-constrained VQFN package but with fewer GPIOs and no pin compatibility.

Availability

MSP430FR2675TRHAT is available at Aetrix Electronics and suitable for smart lock keypads, appliance control panels, and garage door controllers requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR2675TRHAT 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 and embedded processing solutions, with over 50 years of innovation in low-power microcontrollers and precision analog integration.

The MSP430FR267x product line was designed specifically for ultra-low-power capacitive touch HMI applications, integrating CapTIvate technology to eliminate external touch controllers and reduce system BOM cost and complexity.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2675TRHAT?

The MSP430FR2675TRHAT supports up to 16 self-capacitive and 64 mutual-capacitive electrodes. This configuration is fixed for the MSP430FR2675 variant and confirmed in the device comparison table. Electrode allocation is managed entirely in hardware by the CapTIvate module, allowing mixed-mode operation without CPU overhead. The MSP430FR2675TRHAT achieves this using its dedicated CapTIvate timing resources and 35 available GPIOs in the 40-pin VQFN package.

Does the MSP430FR2675TRHAT support wake-on-touch from deep sleep modes?

Yes, the MSP430FR2675TRHAT supports wake-on-touch from LPM3 and LPM4 modes with the CapTIvate module fully active while the CPU and most peripherals remain powered down. In this configuration, the hardware state machine performs electrode scanning and threshold detection autonomously, consuming <0.9 µA per enabled button. Wake events trigger an interrupt to resume CPU execution, with typical wake latency under 10 µs from LPM3.

What package type and pin count does the MSP430FR2675TRHAT use?

The MSP430FR2675TRHAT uses a 40-pin VQFN package (RHA), measuring 6 mm × 6 mm with 0.5 mm pitch and an exposed thermal pad. This package provides 35 GPIOs, all of which support interrupt generation for wake-on-touch functionality. Pin assignments are documented in Figure 7-2 of the SLASEO5D datasheet and include dedicated CapTIvate channels (e.g., CAP2.0–CAP2.3, CAP3.0–CAP3.3) mapped to specific port pins.

How does the MSP430FR2675TRHAT achieve IEC-61000-4-2/4-4/4-6 compliance?

The MSP430FR2675TRHAT achieves IEC-61000-4-2 Level 4 (15 kV air/8 kV contact), IEC-61000-4-4 Level 4 (4 kV EFT), and IEC-61000-4-6 Level 3 (10 V RMS conducted RF) compliance through integrated hardware features: built-in spread-spectrum modulation, automatic electrode tuning, adaptive noise filtering, and debouncing algorithms executed in the CapTIvate state machine. These functions operate independently of firmware and require no external components to meet standard requirements.

Is the CapTIvate Design Center software compatible with the MSP430FR2675TRHAT?

Yes, the CapTIvate Design Center PC GUI is fully compatible with the MSP430FR2675TRHAT and supports real-time tuning of all CapTIvate parameters-including scan interval, sensitivity, filter coefficients, and water rejection thresholds-without code modification. The tool communicates directly with the device via Spy-Bi-Wire and leverages the 16KB ROM-based CapTIvate library preloaded in the MSP430FR2675TRHAT, enabling rapid prototyping and field validation.