Texas Instruments MSP430FR2676TPT

Overview

MSP430FR2676TPT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with integrated CapTIvate™ capacitive touch sensing engine, 64KB FRAM, 8KB RAM, and 43 GPIOs in LQFP-48 package-designed for reliable wake-on-touch operation (<0.9 µA/button) in harsh environments including wet, greasy, or metal-overlaid interfaces.

For engineers reviewing the MSP430FR2676TPT datasheet, MSP430FR2676TPT pinout, MSP430FR2676TPT application, or MSP430FR2676TPT equivalent, this page delivers verified technical context, real-world CapTIvate electrode configurations (up to 16 self- and 64 mutual-capacitance channels), FRAM endurance (10¹⁵ writes), IEC-61000-4-2/4-4/4-6 compliance margins, and LQFP-48 package-specific signal mapping.

Technical Context

The MSP430FR2676TPT integrates a dedicated hardware CapTIvate state machine that performs autonomous electrode scanning-including simultaneous four-scan operation, spread-spectrum modulation, automatic tuning, and noise filtering-while the CPU remains in LPM4.5 (37 nA shutdown). Its 16-bit CPU runs at up to 16 MHz via DCO+FLL with ±1% accuracy using on-chip reference.

Capacitive sensing is implemented across 16 dedicated CAPx.x pins mapped to P1–P6 ports, supporting mixed self/mutual-capacitance topologies with 0–300 pF detection range and metal/water rejection capability. The device includes two eUSCI_A (UART/SPI/IrDA) and two eUSCI_B (SPI/I²C) modules with full pin remap support, plus a 12-bit ADC with 12-channel input multiplexing and internal 1.5/2.0/2.5 V references.

Key Specifications

Pinout & Package

LQFP-48 package (7 mm × 7 mm), thermally enhanced with exposed thermal pad; 43 GPIOs support interrupt wake-up from all low-power modes; dedicated CapTIvate pins include CAP0.x through CAP3.x across P1–P6 ports.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2675TPT and MSP430FR2673TPT, the MSP430FR2676TPT provides highest on-chip memory headroom for advanced CapTIvate features like real-time environmental compensation, multi-layer gesture recognition, and local firmware updates-without requiring external memory expansion.

Availability

MSP430FR2676TPT is available at Aetrix Electronics and suitable for smart appliance HMI, electronic access control systems, and industrial human-machine interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MSP430FR2676TPT 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 over 50 years of innovation in low-power design and precision analog integration.

The MSP430FR267x family was engineered specifically for robust, ultra-low-power capacitive touch applications-integrating CapTIvate technology, FRAM, and mixed-signal peripherals into a single chip optimized for battery-operated and ESD-prone environments.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2676TPT?

The MSP430FR2676TPT 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, enabling complex UIs such as multi-segment sliders, proximity zones, and overlapping button matrices-all managed autonomously by the integrated CapTIvate hardware engine without CPU overhead.

Does the MSP430FR2676TPT require an external crystal for CapTIvate operation?

No, the MSP430FR2676TPT does not require an external crystal for CapTIvate operation. It uses its on-chip 32-kHz REFO oscillator (1 µA typical) or 10-kHz VLO for baseline timing. An external 32.768-kHz crystal (LFXT) is optional and only needed if higher RTC accuracy or synchronization with external systems is required.

What is the wake-on-touch current consumption of the MSP430FR2676TPT?

The MSP430FR2676TPT achieves <0.9 µA per active button in wake-on-touch mode, where the dedicated CapTIvate hardware state machine performs electrode scanning while the CPU remains in deep sleep (LPM4.5). This value is specified in the Features section and validated across operating conditions per TI's SLASEO5D datasheet.

How does the MSP430FR2676TPT handle water or condensation on the touch surface?

The MSP430FR2676TPT implements hardware-based water rejection algorithms-including dynamic threshold adjustment, frequency hopping, and differential scanning-that maintain reliable touch detection even with water droplets or condensation present. This capability is explicitly validated for operation in wet environments per TI's CapTIvate Technology Guide and IEC-61000-4-2 compliance testing.

Is the MSP430FR2676TPT pin-compatible with other devices in the MSP430FR267x family?

Yes, the MSP430FR2676TPT in LQFP-48 (PT) package shares identical pinout and signal mapping with MSP430FR2675TPT and MSP430FR2673TPT in the same PT package. This allows direct substitution within the same footprint when memory or RAM requirements change, provided firmware is recompiled for the target device's resource limits.