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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Texas Instruments MSP430FR2533IRHBR

Name: MSP430FR2533IRHBR
Brand: Texas Instruments
SKU: MSP430FR2533IRHBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430FR2533IRHBR

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 32-VFQFN Exposed Pad

Datasheet:: MSP430FR2533IRHBR.pdf

Description:: IC MCU 16BIT 15.5KB FRAM 32VQFN

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Product details

Overview

MSP430FR2533IRHBR from Texas Instruments is an ultra-low-power mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing, 15.5 KB FRAM, 2 KB RAM, and support for up to 16 self-capacitive or 24 mutual-capacitive electrodes. It operates from 1.8 V to 3.6 V, achieves 126 µA/MHz active current, and delivers <5 µA wake-on-touch power in LPM3.5 - enabling robust touch interfaces in battery-powered smart locks and appliance control panels.

For engineers reviewing the MSP430FR2533IRHBR datasheet, MSP430FR2533IRHBR pinout, MSP430FR2533IRHBR application, or MSP430FR2533IRHBR equivalent, key selection criteria include its 32-pin VQFN (RHB) package, dedicated CapTIvate timing engine, hardware-accelerated noise filtering, and FRAM-based nonvolatile storage with 10¹⁵ write endurance - critical for field-updatable HMI firmware and environmental compensation algorithms.

Technical Context

The MSP430FR2533IRHBR integrates a 16-bit RISC CPU running at up to 16 MHz with a dedicated CapTIvate peripheral that performs autonomous electrode scanning, spread-spectrum modulation, and real-time noise rejection - all while the CPU remains in LPM3 sleep mode. Its clock system includes on-chip DCO (±1% accuracy), REFO, VLO, and LFXT support for precise timing across touch and RTC functions.

It features two eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B (SPI/I²C), an 8-channel 10-bit 200 ksps ADC with internal 1.5-V reference, four 16-bit timers (including one CapTIvate-optimized timer), and CRC16 hardware acceleration - enabling synchronized sensor fusion, secure firmware updates, and low-latency button response in noisy industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 16 general-purpose registers; enables deterministic real-time execution of CapTIvate firmware and application logic without cache misses.
FRAM Capacity	15.5 KB (15360 + 512 B) unified program/data/constant memory; supports instant writes, zero-wait-state execution, and 10¹⁵ endurance for frequent calibration data logging.
RAM Size	2 KB SRAM; sufficient for dual-buffered touch scan results, stack depth for nested interrupts, and lightweight RTOS task contexts.
Capacitive Sensing	Up to 16 self-cap or 24 mutual-cap electrodes; allows flexible layout of buttons + slider on single PCB layer with metal-over-glass compatibility.
Power Consumption	LPM3.5 RTC mode: 730 nA (typical); enables decade-long battery life in always-on proximity wake applications using 32.768-kHz crystal.
ADC Performance	8-channel, 10-bit, 200 ksps with internal 1.5-V reference; supports simultaneous temperature/humidity sensing alongside touch baseline correction.
Package & Pins	VQFN-32 (RHB), 5 mm × 5 mm; 19 GPIOs including 16 interrupt-capable pins (P1/P2) for fast wake-from-sleep on any touch event.

Pinout & Package

VQFN-32 (RHB) package with exposed thermal pad; 5 mm × 5 mm body size, 0.5-mm pitch, RoHS-compliant, moisture-sensitive level 3.

Pin/Terminal	Circuit Role	Design Meaning
RST/NMI/SBWTDIO	Reset / Non-maskable interrupt / Spy-Bi-Wire test I/O	Single-pin debug interface for programming and boundary-scan; also serves as hardware reset and NMI source for fault recovery.
TEST/SBWTCK	Spy-Bi-Wire clock input	Enables low-pin-count JTAG-like debugging and firmware loading without dedicated TCK/TMS pins.
P1.0–P1.7	General-purpose I/O with CapTIvate channel support	Eight pins configurable as self-capacitive electrodes or mutual-capacitive TX/RX; P1.0–P1.3 support analog inputs for ADC integration.
P2.0–P2.7	General-purpose I/O with interrupt capability	All eight pins can generate wake interrupts from LPM3.5/LPM4; P2.0–P2.3 support CapTIvate mutual-capacitance RX channels.
P3.0–P3.2	Dedicated peripheral I/O	P3.0: UCB0STE (SPI slave select); P3.1: TA0.0 (timer capture/compare); P3.2: TA0.1 (second timer channel).
DVCC / DVSS	Main digital/analog power pair	Single 1.8–3.6 V supply powers CPU, FRAM, CapTIvate, ADC, and peripherals; requires 4.7–10 µF bulk + 0.1 µF ceramic decoupling.
VREG	CapTIvate regulator decoupling node	Must be bypassed with 1 µF capacitor (≤200 mΩ ESR) to stabilize internal touch sensing voltage reference under dynamic load.

Key Features

Feature	Design Value
CapTIvate™ Touch Engine	Dedicated hardware accelerator enabling concurrent self/mutual-capacitance scanning, automatic tuning, and spread-spectrum noise rejection - reduces CPU load by >90% during touch polling.
FRAM Memory Architecture	Unified 15.5 KB nonvolatile memory with ECC, configurable write protection, and 10¹⁵ write cycles - eliminates flash wear-out concerns in touch calibration and OTA update scenarios.
Ultra-Low-Power Operation	730 nA LPM3.5 (RTC + 32.768-kHz crystal) and 16 nA LPM4.5 shutdown modes - extends coin-cell battery life to >10 years in smart lock standby.
Hardware CRC16 Engine	Accelerates firmware image integrity checks and sensor data packet validation - ensures reliable over-the-air updates and tamper-resistant HMI operation.
Integrated Analog Peripherals	8-channel 10-bit ADC with 200 ksps sampling and internal 1.5-V reference - enables on-chip environmental compensation (e.g., temperature drift correction) without external components.

Applications

Smart Lock Keypads	Appliance Control Panels
Use Scenario: Capacitive keypad on stainless-steel refrigerator door requiring wet-finger and glove operation. IC Role / Device Role / Timing Role: Primary touch controller executing real-time CapTIvate scanning, baseline tracking, and water-rejection algorithm - independent of main application MCU. Use Value: Achieves IEC 61000-4-2 ±15 kV ESD immunity and 10-V RMS common-mode noise rejection, enabling reliable operation behind 4-mm glass.	Use Scenario: Touch-enabled oven control panel with slider for temperature adjustment and proximity wake. IC Role / Device Role / Timing Role: Dedicated HMI processor handling all capacitive sensing, LED feedback PWM, and UART communication to main system MCU. Use Value: Hardware-accelerated touch scanning at 20-ms intervals with <5 µA average current enables always-on proximity detection without compromising battery backup.
Garage Door Controllers	Wireless Audio Remotes
Use Scenario: Outdoor wall-mounted garage opener with metal housing and exposure to rain, dust, and RF interference. IC Role / Device Role / Timing Role: Standalone touch interface MCU managing button press detection, anti-tamper monitoring, and encrypted command transmission via UART to motor controller. Use Value: Built-in spread-spectrum modulation and automatic tuning maintain >99.9% touch reliability under 4-kV EFT (IEC 61000-4-4) and 15-kV ESD stress.	Use Scenario: Compact Bluetooth speaker remote with multi-function slider and gesture support. IC Role / Device Role / Timing Role: Low-power touch sensor hub performing high-resolution slider interpolation (up to 1024 points) and wake-on-touch state machine management. Use Value: FRAM-based firmware storage enables field-upgradable gesture algorithms without flash reprogramming delays or wear leveling overhead.

Smart Lock Keypads

Appliance Control Panels

Use Scenario: Capacitive keypad on stainless-steel refrigerator door requiring wet-finger and glove operation.

IC Role / Device Role / Timing Role: Primary touch controller executing real-time CapTIvate scanning, baseline tracking, and water-rejection algorithm - independent of main application MCU.

Use Value: Achieves IEC 61000-4-2 ±15 kV ESD immunity and 10-V RMS common-mode noise rejection, enabling reliable operation behind 4-mm glass.

Use Scenario: Touch-enabled oven control panel with slider for temperature adjustment and proximity wake.

IC Role / Device Role / Timing Role: Dedicated HMI processor handling all capacitive sensing, LED feedback PWM, and UART communication to main system MCU.

Use Value: Hardware-accelerated touch scanning at 20-ms intervals with <5 µA average current enables always-on proximity detection without compromising battery backup.

Garage Door Controllers

Wireless Audio Remotes

Use Scenario: Outdoor wall-mounted garage opener with metal housing and exposure to rain, dust, and RF interference.

IC Role / Device Role / Timing Role: Standalone touch interface MCU managing button press detection, anti-tamper monitoring, and encrypted command transmission via UART to motor controller.

Use Value: Built-in spread-spectrum modulation and automatic tuning maintain >99.9% touch reliability under 4-kV EFT (IEC 61000-4-4) and 15-kV ESD stress.

Use Scenario: Compact Bluetooth speaker remote with multi-function slider and gesture support.

IC Role / Device Role / Timing Role: Low-power touch sensor hub performing high-resolution slider interpolation (up to 1024 points) and wake-on-touch state machine management.

Use Value: FRAM-based firmware storage enables field-upgradable gesture algorithms without flash reprogramming delays or wear leveling overhead.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430FR2633IRHBR	15.5 KB FRAM, 4 KB RAM, 16 self-/64 mutual-cap electrodes, dedicated CapTIvate timing engine	Supports larger touch surfaces (e.g., full-panel sliders) and higher channel count than MSP430FR2533IRHBR	Select when design requires >24 mutual-capacitance channels or deeper buffer space for complex UI logic.
MSP430FR2532IRHBR	8 KB FRAM, 1 KB RAM, 8 self-/8 mutual-cap electrodes, same VQFN-32 package	Lower electrode count and memory footprint; suitable for simple 4-button interfaces only	Choose for cost-sensitive, minimal-feature designs where 16+ electrodes are unnecessary.

Compared with MSP430FR2533IRHBR, MSP430FR2633IRHBR offers double the RAM and quadruple the mutual-capacitance channel count for advanced HMI, while MSP430FR2532IRHBR reduces FRAM and RAM by >50% - trading flexibility for bill-of-materials savings in basic touch applications.

Availability

MSP430FR2533IRHBR 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 MSP430FR2533IRHBR 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in ultra-low-power microcontrollers and precision analog signal chains.

The MSP430FR2533IRHBR belongs to TI's CapTIvate-enabled FRAM MCU family, designed specifically for robust, low-power capacitive touch human-machine interfaces in consumer, industrial, and home automation applications - prioritizing noise immunity, battery longevity, and rapid development.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2533IRHBR?

The MSP430FR2533IRHBR supports up to 16 self-capacitive electrodes or 24 mutual-capacitive electrodes. This configuration enables flexible HMI layouts such as multi-button keypads combined with short sliders. The device uses dedicated hardware resources within the CapTIvate module to manage electrode scanning independently of CPU activity, ensuring consistent performance even during deep-sleep modes like LPM3.5.

Does the MSP430FR2533IRHBR include hardware-accelerated cryptographic functions?

No, the MSP430FR2533IRHBR does not include dedicated cryptographic accelerators such as AES or SHA engines. It provides a hardware CRC16 module for data integrity checking and supports secure boot via bootloader (BSL) with password protection. For encryption-intensive applications, external secure elements or software-based libraries running on its 16-bit CPU may be used - though performance and power trade-offs apply. The device focuses on touch sensing reliability rather than cryptographic throughput.

What package type and dimensions does the MSP430FR2533IRHBR use?

The MSP430FR2533IRHBR uses a 32-pin VQFN package (RHB variant) with 5 mm × 5 mm body size and 0.5-mm pin pitch. It includes an exposed thermal pad for enhanced heat dissipation and meets RoHS requirements. This compact, surface-mount package supports high-density PCB layouts and is compatible with standard reflow soldering profiles - making it ideal for space-constrained consumer electronics and white goods control modules.

Can the MSP430FR2533IRHBR operate reliably in wet or greasy environments?

Yes, the MSP430FR2533IRHBR is engineered for operation in harsh environments including wet, greasy, and dirty conditions. Its CapTIvate technology incorporates hardware-based water rejection algorithms, spread-spectrum modulation, and adaptive baseline tracking - validated to meet IEC 61000-4-2 (±15 kV ESD), IEC 61000-4-4 (4 kV EFT), and IEC 61000-4-6 (10 V RMS conducted noise) standards. These capabilities enable reliable touch detection through condensation, oil films, or partial submersion.

What development tools are officially supported for the MSP430FR2533IRHBR?

Texas Instruments officially supports the CAPTIVATE-PGMR programmer and CAPTIVATE-FR2633 evaluation board for the MSP430FR2533IRHBR. The CapTIvate Design Center PC GUI enables real-time tuning of touch parameters without code changes, while MSP430Ware™ provides ROM-resident CapTIvate software libraries. Target boards like MSP-TS430RGE24A offer socket-based prototyping, and Code Composer Studio v10+ delivers full debug integration including Spy-Bi-Wire support for the MSP430FR2533IRHBR.

MSP430FR2533IRHBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 32-VFQFN Exposed Pad

Series:: MSP430™ FRAM

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: MSP430 CPU16

Core Size:: 16-Bit

Speed:: 16MHz

Connectivity:: I2C, IrDA, SCI, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 19

Program Memory Size:: 15.5KB (15.5K x 8)

Program Memory Type:: FRAM

EEPROM Size:: -

RAM Size:: 2K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 8x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430FR2533IRHBR FAQ

1.How can I place an order for MSP430FR2533IRHBR through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430FR2533IRHBR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MSP430FR2533IRHBR reliable?

The price and inventory of MSP430FR2533IRHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR2533IRHBR is usually 5 days.

3.What payment methods are accepted for MSP430FR2533IRHBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR2533IRHBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430FR2533IRHBR?

MSP430FR2533IRHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430FR2533IRHBR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MSP430FR2533IRHBR?

For technical support, including MSP430FR2533IRHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR2533IRHBR requirements.

6.How does Aetrix verify that MSP430FR2533IRHBR is sourced from the original manufacturer or authorized distributors?

All MSP430FR2533IRHBR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430FR2533IRHBR meets industry standards.

7.What is the process for return or replacement of MSP430FR2533IRHBR?

All MSP430FR2533IRHBR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR2533IRHBR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MSP430FR2533IRHBR part is unused and in its original packaging.

Return procedure for MSP430FR2533IRHBR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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