Texas Instruments MSP430FR2633IRHBR

Overview

MSP430FR2633IRHBR from Texas Instruments is a capacitive touch-sensing mixed-signal microcontroller featuring CapTIvate™ technology, 16-bit RISC CPU, 15.5 KB FRAM (15 KB program + 512 B info), 4 KB RAM, and support for up to 16 self- or 64 mutual-capacitance electrodes. It operates from 1.8 V to 3.6 V, achieves <5 µA wake-on-touch current with four sensors, and targets HMI applications in harsh environments including wet, greasy, or metal-covered surfaces.

For engineers reviewing the MSP430FR2633IRHBR datasheet, MSP430FR2633IRHBR pinout, MSP430FR2633IRHBR application, or MSP430FR2633IRHBR equivalent, key selection criteria include ultra-low-power CapTIvate performance, FRAM endurance (10¹⁵ writes), integrated RTC in LPM3.5 (730 nA), and hardware-accelerated noise immunity compliant with IEC‑61000-4-2/4-4/6.

Technical Context

The MSP430FR2633IRHBR integrates a dedicated CapTIvate module with hardware-accelerated electrode scanning, spread-spectrum modulation, automatic tuning, and built-in debouncing-enabling reliable operation under 10-V RMS common-mode noise and 4-kV EFT. Its clock system includes on-chip 16-MHz DCO with FLL, ±1% accuracy at room temperature, plus selectable LFXT, REFO, VLO, and MODOSC sources.

It features two eUSCI_A modules supporting UART/IrDA/SPI and one eUSCI_B for SPI/I²C; four 16-bit timers-including Timer_A3 with three capture/compare registers-and an ADC with 8 single-ended channels, 10-bit resolution, 200 ksps sampling, and internal 1.5-V reference.

Key Specifications

Pinout & Package

VQFN-32 (RHB) package with 5 mm × 5 mm footprint, exposed thermal pad, and 0.5-mm pitch. Designed for compact, thermally efficient PCB layouts in space-constrained HMI applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2533IRHBR and MSP430FR2632IRHBR, the MSP430FR2633IRHBR provides higher memory headroom, greater electrode scalability, and enhanced analog resources-making it optimal for feature-rich, future-proof HMI designs requiring long-term code maintainability and complex gesture support.

Availability

MSP430FR2633IRHBR is available at Aetrix Electronics and suitable for smart lock keypads, garage door control panels, wireless speaker interfaces, and motorized window blind remotes requiring stable component supply, long-lifecycle assurance, and production-ready qualification.

Supply support for MSP430FR2633IRHBR 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 emphasis on energy efficiency, reliability, and system integration.

The MSP430FR2633IRHBR belongs to TI's ultra-low-power FRAM MCU family, engineered specifically for robust, battery-efficient capacitive touch human-machine interfaces in consumer, industrial, and building automation systems.

FAQ

What is the primary function of the MSP430FR2633IRHBR in an HMI system?

The MSP430FR2633IRHBR serves as a standalone capacitive touch microcontroller, integrating CapTIvate™ technology, 16-bit CPU, FRAM, and peripherals to replace discrete touch controllers and MCUs. It handles electrode scanning, noise rejection, gesture processing, and system control-all within a single VQFN-32 package. Its design eliminates external components for most touch applications, reducing BOM cost and board area while maintaining high reliability in challenging environments.

Does the MSP430FR2633IRHBR support both self- and mutual-capacitance sensing simultaneously?

Yes, the MSP430FR2633IRHBR supports concurrent self-capacitance and mutual-capacitance electrode configurations on the same design. This allows mixing button and slider/wheel elements in one interface-for example, using P1.x pins for self-cap buttons and P2.x pins for mutual-cap sliders. The CapTIvate module manages timing, calibration, and signal processing independently for each type without CPU intervention.

What power modes does the MSP430FR2633IRHBR offer for battery-operated devices?

The MSP430FR2633IRHBR offers six low-power modes, including LPM3.5 (RTC active at 730 nA) and LPM4.5 (shutdown at 16 nA). In wake-on-touch mode, it consumes <5 µA while scanning four electrodes with CPU asleep. These modes enable multi-year operation on coin cells in applications like remote controls and smart locks-without compromising responsiveness or feature set.

How does the FRAM memory in the MSP430FR2633IRHBR differ from traditional flash in practical use?

The MSP430FR2633IRHBR's 15.5 KB FRAM provides instant writes (no erase-before-write), 10¹⁵ endurance cycles, and radiation resistance-unlike flash, which requires block erasure and degrades after ~10⁵ cycles. This enables frequent data logging (e.g., touch event counters), over-the-air firmware updates without wear leveling, and secure storage of calibration parameters that survive 10+ years-even in high-vibration or high-radiation environments.

Can the MSP430FR2633IRHBR drive a real-time clock without external components?

Yes, the MSP430FR2633IRHBR includes a dedicated 16-bit RTC counter that operates in LPM3.5 using an external 32.768-kHz crystal, drawing only 730 nA (typical). It also supports internal VLO or REFO clocks for less-precise timekeeping without crystals. The RTC maintains time during deep sleep and can trigger wake-up events-ideal for scheduling, timestamping, or low-power periodic sensing.