Texas Instruments MSP430FR2676TPTR

Overview

MSP430FR2676TPTR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing engine, 64KB FRAM, 8KB RAM, and 43 GPIOs in LQFP-48 package. It supports up to 16 self-capacitive and 64 mutual-capacitive electrodes, operates from 1.8 V to 3.6 V, and delivers <0.9 µA/button wake-on-touch current for battery-powered HMI applications such as smart locks and appliance control panels.

For engineers reviewing the MSP430FR2676TPTR datasheet, MSP430FR2676TPTR pinout, MSP430FR2676TPTR application, or MSP430FR2676TPTR equivalent, this page provides verified technical context, validated pin functions, confirmed CapTIvate timing and noise immunity specs, real-world application mappings, and two rigorously cross-checked alternative parts for touch-sensing MCU selection.

Technical Context

The MSP430FR2676TPTR integrates a dedicated hardware-based CapTIvate module with four concurrent electrode scan engines, spread-spectrum modulation, automatic tuning, and built-in debouncing-enabling reliable operation under 10-V RMS common-mode noise and 4-kV EFT per IEC‑61000-4-4. Its 16-bit RISC CPU runs at up to 16 MHz using a digitally controlled oscillator (DCO) with ±1% accuracy at room temperature.

Capacitive sensing is decoupled from CPU execution via a state-machine-driven wake-on-touch path: the hardware scans electrodes and detects touches while the CPU remains in LPM3 (<5 µA), then wakes only on valid event. FRAM memory (64KB program + 512B info) enables fast write endurance (10¹⁵ cycles), ECC protection, and unified storage for code, constants, and runtime data without flash wear leveling overhead.

Key Specifications

Pinout & Package

LQFP-48 (PT) package, 7 mm × 7 mm body size, 0.5 mm pitch, thermally enhanced with exposed thermal pad (not electrically connected). Pinout validated per TI SLASEO5D Rev. D Figure 7-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2675TPT, the MSP430FR2676TPTR provides double the FRAM and 2KB more RAM for complex UI stacks or OTA update staging; versus MSP430FR2673TRHB, it offers 40 additional mutual-cap electrodes, LQFP-48 routing flexibility, and 4× more program memory-justifying its use in premium appliances and industrial HMIs.

Availability

MSP430FR2676TPTR is available at Aetrix Electronics and suitable for smart lock keypads, appliance control panels, and garage door controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEM programs.

Supply support for MSP430FR2676TPTR 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 designed specifically for robust, ultra-low-power capacitive touch human-machine interfaces-integrating CapTIvate technology, FRAM, and mixed-signal peripherals into a single chip for metal, wet, and noisy environments.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2676TPTR?

The MSP430FR2676TPTR supports up to 16 self-capacitive and 64 mutual-capacitive electrodes simultaneously. This capability is confirmed in the device comparison table (SLASEO5D Table 6-1) and applies specifically to the MSP430FR2676TPTR variant in LQFP-48 package. Electrode allocation is configurable via CapTIvate software library and hardware register settings-not limited by pin count alone.

Does the MSP430FR2676TPTR require an external crystal for basic CapTIvate operation?

No, the MSP430FR2676TPTR can operate CapTIvate sensing using its internal 32-kHz REFO oscillator (1 µA typical), eliminating need for external crystal in cost-sensitive or space-constrained designs. External 32-kHz crystal (LFXT) is optional and used only when higher timing accuracy or lower drift across temperature is required for specific sensor calibration routines.

What is the wake-on-touch current consumption of the MSP430FR2676TPTR in LPM3 mode?

In LPM3 mode with four capacitive sensors active, the MSP430FR2676TPTR consumes less than 5 µA total supply current while continuously scanning electrodes via hardware state machine. The wake-on-touch path operates independently of CPU execution, allowing full touch responsiveness without waking the core-verified in Section 8.7 of SLASEO5D.

How does the MSP430FR2676TPTR achieve IEC‑61000-4-2 compliance?

The MSP430FR2676TPTR achieves 15-kV air-gap and 8-kV contact ESD immunity per IEC‑61000-4-2 through on-die protection structures, spread-spectrum modulation, automatic tuning, and hardware noise filtering-all part of the CapTIvate engine. System-level compliance also requires proper PCB layout (e.g., ground plane, keep-out zones), but the IC itself meets the standard's electrical stress thresholds without external TVS diodes.

Is the MSP430FR2676TPTR pin-compatible with other devices in the MSP430FR267x family?

Yes-the MSP430FR2676TPTR shares identical pinout, signal mapping, and package dimensions with MSP430FR2675TPT in LQFP-48 (PT) package. Both devices have 43 GPIOs, same CapTIvate channel assignments (e.g., CAP0.0 = P3.0), and identical power/ground/programming pin locations. This allows direct substitution where firmware fits within 32KB FRAM.