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Texas Instruments MSP430FR2533IDA
- Part No.:
- MSP430FR2533IDA
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR2533IDA.pdf
- Description:
- IC MCU 16BIT 15.5KB FRAM 32TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:870
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Product details
Overview
MSP430FR2533IDA from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing, 15.5 KB FRAM, 2 KB RAM, and 8-channel 10-bit ADC. It supports up to 16 self-capacitive or 24 mutual-capacitive electrodes, operates from 1.8 V to 3.6 V, and achieves <5 µA wake-on-touch current-designed for battery-powered HMI interfaces in smart locks and appliance control panels.
For engineers reviewing the MSP430FR2533IDA datasheet, MSP430FR2533IDA pinout, MSP430FR2533IDA application, or MSP430FR2533IDA equivalent, key selection criteria include its TSSOP-32 package, dedicated CapTIvate timing engine, LPM3.5 RTC operation at 730 nA, hardware-accelerated noise filtering, and support for metal/water-rejecting touch designs without external components.
Technical Context
The MSP430FR2533IDA integrates a dedicated CapTIvate peripheral with autonomous electrode scanning, spread-spectrum modulation, and real-time environmental compensation-enabling reliable touch detection under 10-V RMS common-mode noise and 15-kV ESD. Its clock system combines a 16-MHz DCO with FLL, 32-kHz LFXT crystal support, and low-frequency VLO/REFO oscillators for precise LPM3.5 RTC operation.
It features two eUSCI_A modules (UART/IrDA/SPI) and one eUSCI_B (SPI/I²C), four 16-bit timers-including one timer exclusively assigned to CapTIvate-and a 16-bit CRC accelerator. The FRAM memory architecture enables 10¹⁵ write cycles, unified program/data storage, and configurable ECC-protected write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers, up to 16 MHz operation |
| Memory | 15.5 KB FRAM (15 KB program + 512 B info), 2 KB SRAM |
| Capacitive Sensing | Up to 16 self-cap or 24 mutual-cap electrodes; hardware-accelerated scan & filtering |
| Power Consumption | LPM3.5 RTC mode: 730 nA (32.768 kHz crystal); wake-on-touch: <5 µA (4 sensors) |
| Analog Peripherals | 8-channel 10-bit SAR ADC, 200 ksps sample rate, internal 1.5-V reference |
| Digital Interfaces | 2× eUSCI_A (UART/IrDA/SPI), 1× eUSCI_B (SPI/I²C), JTAG/Spy-Bi-Wire debug |
| Package | TSSOP-32 (11 mm × 6.2 mm), 19 GPIOs including 16 interrupt-capable pins (P1/P2) |
Pinout & Package
TSSOP-32 (DA) package with 11 mm × 6.2 mm footprint, exposed thermal pad not present, JEDEC-compliant lead finish, rated for industrial temperature range (–40°C to 85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire data I/O | Active-low reset input; dual-function NMI source and debug interface pin |
| TEST/SBWTCK | Spy-Bi-Wire clock | Debug clock input for programming and emulation; no functional use in application |
| P1.0–P1.7 | General-purpose I/O with interrupt capability | All 8 pins support wake-from-LPM; P1.4–P1.7 multiplexed with eUSCI_A0 and Timer_A1 |
| P2.0–P2.7 | General-purpose I/O with interrupt capability | All 8 pins support wake-from-LPM; P2.0–P2.3 multiplexed with ADC inputs A0–A3 |
| P3.0–P3.2 | General-purpose I/O | 3-pin port with no interrupt capability; P3.0–P3.1 support eUSCI_B0 (I²C/SPI) |
| DVCC / DVSS | Main digital power supply pair | 1.8–3.6 V supply; requires 4.7–10 µF bulk + 0.1 µF ceramic decoupling per supply rail |
| XIN / XOUT | Low-frequency crystal oscillator terminals | Supports 32.768 kHz tuning fork crystal for RTC; internal load caps eliminate external caps |
Key Features
| Feature | Design Value |
|---|---|
| CapTIvate™ Touch Engine | Dedicated hardware block enabling concurrent self/mutual-capacitance scanning, automatic tuning, and spread-spectrum noise rejection-no CPU intervention required during active sensing |
| FRAM Memory Architecture | 15.5 KB nonvolatile FRAM with ECC, 10¹⁵ write endurance, unified memory map, and 125 ns fast read/write-eliminates flash erase delays and wear leveling overhead |
| Ultra-Low-Power Operation | LPM3.5 mode draws only 730 nA with 32.768 kHz RTC running; wake-on-touch state machine scans electrodes autonomously while CPU remains in LPM4 |
| Integrated Analog Subsystem | 8-channel 10-bit ADC with 200 ksps throughput, internal 1.5-V reference, and programmable sample-and-hold-supports direct sensor interfacing without external signal conditioning |
| Robust ESD/EMI Immunity | Qualified to IEC‑61000-4-2 (±15 kV contact), IEC‑61000-4-4 (4 kV EFT), and IEC‑61000-4-6 (10 V RMS RF immunity)-enables certified touch solutions without shielding or guard traces |
Applications
| Smart Lock Keypads | Appliance Control Panels |
|---|---|
|
Use Scenario: Capacitive keypad on stainless-steel door lock housing, operating in humid outdoor environments with frequent hand moisture and glove use. IC Role / Device Role / Timing Role: MSP430FR2533IDA serves as the sole HMI controller, executing real-time proximity wake-up, wet-finger rejection, and metal-over-glass button detection using its dedicated CapTIvate engine. Use Value: Achieves >99.5% touch recognition accuracy under 15-kV ESD and 10-V RMS conducted noise-enabling UL/IEC certification without mechanical buttons or external noise filters. |
Use Scenario: Touch-sensitive control panel on refrigerator or oven with glass overlay, requiring multi-button press detection and slider-based temperature adjustment. IC Role / Device Role / Timing Role: MSP430FR2533IDA hosts the full UI stack, managing up to 16 self-capacitive buttons and 24 mutual-capacitive sliders via hardware-accelerated scan engine and ROM-based CapTIvate library. Use Value: Reduces BOM cost by eliminating external touch controller IC and analog front-end components; supports water-reject algorithms that maintain functionality during surface condensation. |
| Garage Door Remote Controls | Wireless Speaker Keyboards |
|
Use Scenario: Compact handheld remote with sealed plastic enclosure, powered by coin-cell battery, requiring years of standby life and reliable single-button activation. IC Role / Device Role / Timing Role: MSP430FR2533IDA functions as the system-on-chip-handling touch sensing, BLE subsystem control (via UART), and ultra-low-power sleep management using LPM4.5 (16 nA shutdown). Use Value: Enables >5-year battery life with wake-on-touch response <100 ms; FRAM retains calibration data and user settings across power cycles without backup capacitor. |
Use Scenario: Touch-enabled volume slider and playback controls on Bluetooth speaker housing with curved plastic surface and ambient light exposure. IC Role / Device Role / Timing Role: MSP430FR2533IDA implements high-resolution slider (up to 1024 points) and proximity wake-up using mutual-capacitance electrodes routed beneath opaque plastic. Use Value: Delivers smooth 16-bit resolution slider control with <2% linearity error and automatic ambient light compensation-no firmware tuning required post-manufacture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR2633IDA | Same TSSOP-32 package, 4 KB RAM (vs. 2 KB), 16 CapTIvate channels (vs. 16), supports up to 64 mutual-cap electrodes (vs. 24) | Required for designs needing >24 mutual-cap sensors or deeper firmware buffers for complex UI logic | Select when higher RAM headroom or expanded mutual-cap electrode count is needed; identical pinout and software compatibility |
| MSP430FR2532IDA | Same TSSOP-32 package, 8 KB FRAM (vs. 15.5 KB), 1 KB RAM (vs. 2 KB), supports only 8 self- or 8 mutual-cap electrodes | Suitable for simple 4–8 button interfaces where memory and sensor count are constrained | Choose for cost-sensitive, minimal-feature touch applications; shares same footprint but reduced peripheral resources |
Compared with MSP430FR2533IDA, MSP430FR2633IDA offers double the RAM and triple the mutual-cap electrode capacity for richer UIs, while MSP430FR2532IDA trades memory and sensing scale for lower unit cost-enabling tiered product families with shared PCB layout and firmware base.
Availability
MSP430FR2533IDA is available at Aetrix Electronics and suitable for smart lock keypads, appliance control panels, and garage door remotes requiring stable component supply, long-lifecycle assurance, and industrial-grade reliability.
Supply support for MSP430FR2533IDA 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-level integration.
The MSP430FR2xx family delivers ultra-low-power mixed-signal MCUs optimized for capacitive touch HMI, combining FRAM memory, autonomous CapTIvate sensing, and sub-µA real-time operation for battery-constrained industrial and consumer interfaces.
FAQ
What is the maximum number of capacitive touch electrodes supported by the MSP430FR2533IDA?
The MSP430FR2533IDA supports up to 16 self-capacitive electrodes or up to 24 mutual-capacitive electrodes. This configuration is fixed per device variant and confirmed in the Device Comparison table (SLAS942E, Table 3-1). Electrode count cannot be increased via firmware update or configuration register change-it is a hardware-defined limit tied to the CapTIvate module's channel allocation in this specific part.
Does the MSP430FR2533IDA require external crystal loading capacitors for the 32.768 kHz RTC oscillator?
No, the MSP430FR2533IDA integrates internal load capacitors for the LFXT oscillator, eliminating the need for external crystals or loading capacitors on XIN/XOUT pins. This is explicitly stated in Section 1.1 ("Features") and verified in the "Clock System" subsection: "Internal load capacitors eliminate need for external components." External crystal is optional but not required for basic RTC operation.
What is the typical current consumption of the MSP430FR2533IDA in real-time clock mode with 32.768 kHz crystal?
The MSP430FR2533IDA draws 730 nA typical current in LPM3.5 mode with the 32.768 kHz crystal enabled and RTC counter active. This value is specified in Section 1.1 ("Features") and confirmed in Section 5.8 ("Low-Power Mode LPMx.5 Supply Currents") of SLAS942E. It represents the lowest active-current RTC mode available on this device.
Can the MSP430FR2533IDA operate reliably in wet or greasy environments?
Yes-the MSP430FR2533IDA includes built-in water rejection and grease-tolerant algorithms within its CapTIvate engine, validated to meet IEC‑61000-4-2 (15-kV ESD) and operate through condensation, oil films, and conductive contaminants. TI documentation confirms support for "water rejection designs" and operation in "wet, greasy, and dirty environments" without additional hardware.
Is the MSP430FR2533IDA pin-compatible with other devices in the MSP430FR253x/FR263x family?
Yes-the MSP430FR2533IDA shares identical TSSOP-32 (DA) pinout and electrical characteristics with MSP430FR2633IDA, MSP430FR2532IDA, and MSP430FR2632IDA. Pin mapping, voltage tolerances, and I/O drive strength are fully compatible, enabling drop-in replacement within the same package variant per TI's Device Comparison table and Package Option Addendum.
MSP430FR2533IDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-TSSOP (0.240", 6.10mm Width)
- Series:
- MSP430™ FRAM
- Packaging:
- Bulk
- 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:
MSP430FR2533IDA FAQ
1.How can I place an order for MSP430FR2533IDA through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR2533IDA 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 MSP430FR2533IDA reliable?
The price and inventory of MSP430FR2533IDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR2533IDA is usually 5 days.
3.What payment methods are accepted for MSP430FR2533IDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR2533IDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR2533IDA?
MSP430FR2533IDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR2533IDA 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 MSP430FR2533IDA?
For technical support, including MSP430FR2533IDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR2533IDA requirements.
6.How does Aetrix verify that MSP430FR2533IDA is sourced from the original manufacturer or authorized distributors?
All MSP430FR2533IDA 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 MSP430FR2533IDA meets industry standards.
7.What is the process for return or replacement of MSP430FR2533IDA?
All MSP430FR2533IDA units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR2533IDA, 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 MSP430FR2533IDA part is unused and in its original packaging.
Return procedure for MSP430FR2533IDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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