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Texas Instruments MSP430FR2533IDAR
- Part No.:
- MSP430FR2533IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR2533IDAR.pdf
- Description:
- IC MCU 16BIT 15.5KB FRAM 32TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430FR2533IDAR from Texas Instruments is a capacitive touch-sensing mixed-signal microcontroller featuring CapTIvate™ technology, 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, low-power HMI solutions in smart locks and appliance control panels.
For engineers reviewing the MSP430FR2533IDAR datasheet, MSP430FR2533IDAR pinout, MSP430FR2533IDAR application, or MSP430FR2533IDAR equivalent, key selection criteria include its dedicated CapTIvate hardware engine, FRAM endurance (1015 writes), integrated 10-bit ADC with 200 ksps sampling, and TSSOP-32 package compatibility with legacy MSP430 layouts.
Technical Context
The MSP430FR2533IDAR integrates a 16-bit RISC CPU with a programmable 16-MHz DCO/FLL clock system, on-chip 32-kHz REFO and 10-kHz VLO oscillators, and dual eUSCI modules supporting UART/IrDA/SPI (eUSCI_A) and SPI/I²C (eUSCI_B). Its CapTIvate module includes hardware-accelerated electrode scanning, spread-spectrum modulation, and automatic tuning - all operating autonomously during LPM3 while CPU remains asleep.
It features four 16-bit timers (two Timer_A3 with three CCRs each, two Timer_A2 with two CCRs each), a dedicated CapTIvate timer, RTC counter, 16-bit CRC engine, and unified FRAM memory architecture with ECC and configurable write protection. The device supports concurrent self- and mutual-capacitance sensing on shared I/O pins without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 register file; enables deterministic real-time response for touch event handling |
| Max Clock Frequency | 16 MHz (DCO/FLL); supports high-speed electrode scanning and fast ADC conversion cycles |
| FRAM Capacity | 15.5 KB (15 KB program + 512 B info); retains code and calibration data across power cycles with no wear-out |
| RAM Size | 2 KB SRAM; sufficient for CapTIvate firmware stack, sensor buffers, and application variables |
| Capacitive Sensing | Up to 16 self- or 24 mutual-capacitance electrodes; enables compact keypad + slider designs in single-package solution |
| ADC Resolution & Speed | 10-bit, 200 ksps sample-and-hold; supports analog sensor integration (e.g., temperature, battery monitoring) |
| Low-Power Modes | LPM3.5 (RTC + CapTIvate active): 730 nA; LPM4.5 (shutdown): 16 nA; enables multi-year battery life in remote controls |
Pinout & Package
TSSOP-32 (DA) package: 11 mm × 6.2 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected), JEDEC-compliant footprint compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire data I/O | Single-pin debug interface; enables programming and debugging without dedicated JTAG pins |
| TEST/SBWTCK | Spy-Bi-Wire clock input | Provides synchronous timing for SBW communication; shares pin with TEST function for factory test |
| P1.0–P1.7 | General-purpose I/O with CapTIvate, ADC, eUSCI, timer functions | Eight pins support simultaneous self/mutual capacitance sensing; P1.0–P1.3 also serve as ADC inputs A0–A3 |
| P2.0–P2.7 | General-purpose I/O with CapTIvate, eUSCI, timer functions | Eight pins support additional electrode channels; P2.0–P2.3 double as UART/I²C signals (UCA0TXD, UCB0SOMI, etc.) |
| P3.0–P3.2 | General-purpose I/O with CapTIvate and timer functions | Three pins extend electrode count; P3.0–P3.2 also map to TA0.0–TA0.2 for timer capture/compare |
| DVCC / DVSS | Main digital/analog power supply pair | Single 1.8–3.6 V rail powers all logic, CapTIvate, ADC, and peripherals; requires 4.7–10 µF bulk + 0.1 µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| CapTIvate™ Hardware Engine | Dedicated peripheral with autonomous electrode scanning, spread-spectrum modulation, and noise filtering - reduces CPU load by >90% vs software-only touch |
| FRAM Endurance | 1015 write cycles; eliminates flash wear leveling overhead and enables frequent calibration storage in real time |
| Wake-on-Touch Power | <5 µA with four sensors active in LPM3.5; allows immediate response to touch events without full MCU wake-up latency |
| IEC Compliance Support | Validated for 4-kV EFT (IEC‑61000-4-4), 15-kV ESD (IEC‑61000-4-2), and 10-V RMS common-mode noise immunity - simplifies EMC certification |
| Unified Memory Architecture | FRAM used for code, constants, and data storage; eliminates separate RAM/flash memory management in firmware |
Applications
| Smart Lock Keypads | Appliance Control Panels |
|---|---|
|
Use Scenario: Touch-sensitive entry keypad on residential smart locks, operating through 3-mm glass or metal bezels in outdoor environments. IC Role / Device Role / Timing Role: Primary HMI controller executing CapTIvate scanning, button debouncing, encryption offload, and secure wireless interface coordination. Use Value: Immunity to water, grease, and ESD ensures reliable operation at IP65-rated enclosures without mechanical buttons or overlays. |
Use Scenario: Wash-cycle selector and status display on front-loading washing machines with wet-hand usability requirements. IC Role / Device Role / Timing Role: Standalone touch controller managing slider-based temperature/duration inputs and LED feedback via GPIO-driven drivers. Use Value: Proximity wake-up reduces standby power to <5 µA, extending battery backup life beyond 5 years during power outages. |
| Garage Door Remotes | Wireless Speaker Controls |
|
Use Scenario: Compact handheld remote with multi-button layout and proximity detection to activate UI before pressing. IC Role / Device Role / Timing Role: Low-power HMI processor handling wake-on-proximity, button scan, and RF transmission trigger sequencing. Use Value: 16 nA shutdown current enables 10+ year CR2032 battery life; mutual-capacitance supports gesture recognition on curved plastic surfaces. |
Use Scenario: Volume, play/pause, and source-select controls embedded in speaker grilles with metal mesh overlay. IC Role / Device Role / Timing Role: Capacitive touch sensor interfacing directly to audio SoC via I²C, providing calibrated touch coordinates and swipe gestures. Use Value: Metal-touch capability eliminates need for conductive paint or aperture windows; built-in spread spectrum minimizes RF interference with Bluetooth audio streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR2532IDA | 8 KB program FRAM, 1 KB RAM, supports only 8 self- or 8 mutual-capacitance electrodes | Suitable for simpler 4–6 button interfaces; lacks slider/wheel support beyond basic keypads | Select when cost sensitivity outweighs electrode count and memory headroom requirements |
| MSP430FR2633IDA | Same package and pinout; 4 KB RAM, 15 KB FRAM, supports up to 16 self- or 64 mutual-capacitance electrodes | Enables complex HMI with sliders, wheels, and multitouch gestures; higher RAM supports larger CapTIvate firmware | Choose when advanced gesture recognition or future firmware expansion is required |
Compared with MSP430FR2532IDA, the MSP430FR2533IDAR offers 94% more FRAM and doubles electrode capacity - making it optimal for mid-tier HMI where cost and complexity must be balanced. Against MSP430FR2633IDA, it trades 2 KB RAM and 40 mutual-capacitance channels for lower BOM cost and reduced memory overhead in fixed-function applications.
Availability
MSP430FR2533IDAR is available at Aetrix Electronics and suitable for smart lock keypads, appliance control panels, and garage door remotes requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430FR2533IDAR 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 90 years of engineering excellence and broad industrial design-in support.
The MSP430FR2xx family targets ultra-low-power human-machine interface applications, integrating CapTIvate touch sensing, FRAM nonvolatility, and intelligent peripherals to replace mechanical buttons and simplify certified HMI development.
FAQ
What is the maximum number of capacitive touch electrodes supported by the MSP430FR2533IDAR?
The MSP430FR2533IDAR supports up to 16 self-capacitive electrodes or 24 mutual-capacitive electrodes. This configuration is confirmed in the Device Comparison table (SLAS942E, Table 3-1) and aligns with its 19 GPIOs allocated across P1, P2, and P3 ports. Electrode count is limited by internal CapTIvate channel resources, not pin count alone.
Does the MSP430FR2533IDAR include hardware-based cryptographic acceleration?
No, the MSP430FR2533IDAR does not include dedicated cryptographic hardware accelerators. Its security features rely on software-based implementations using the 32-bit hardware multiplier (MPY32) and FRAM write protection. For hardware AES or SHA acceleration, designers should consider the MSP430FR59xx or MSP430FR69xx families instead.
What package type and pin count does the MSP430FR2533IDAR use?
The MSP430FR2533IDAR uses a 32-pin TSSOP (Thin Shrink Small Outline Package) with designation DA. This is explicitly listed in the Device Information table (SLAS942E, page 3) and confirmed in the Package Option Addendum. The pin pitch is 0.65 mm, and the body size is 11 mm × 6.2 mm.
Can the MSP430FR2533IDAR operate from a single 1.8-V supply?
Yes, the MSP430FR2533IDAR operates across a supply range of 1.8 V to 3.6 V. The minimum voltage is constrained by SVS (Supply Voltage Supervisor) thresholds, but 1.8 V is fully supported per Recommended Operating Conditions (SLAS942E, Section 5.3). At 1.8 V, maximum clock frequency is reduced to 8 MHz due to DCO/FLL limitations.
Is the MSP430FR2533IDAR pin-compatible with other devices in the MSP430FR253x series?
Yes, the MSP430FR2533IDAR is pin-compatible with the MSP430FR2532IDA in the same TSSOP-32 (DA) package. Both share identical pin functions, electrical characteristics, and footprint. However, firmware and memory layout differ due to FRAM/RAM size variations - requiring recompilation but no PCB change.
MSP430FR2533IDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-TSSOP (0.240", 6.10mm Width)
- 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:
MSP430FR2533IDAR FAQ
1.How can I place an order for MSP430FR2533IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR2533IDAR 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 MSP430FR2533IDAR reliable?
The price and inventory of MSP430FR2533IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR2533IDAR is usually 5 days.
3.What payment methods are accepted for MSP430FR2533IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR2533IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR2533IDAR?
MSP430FR2533IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR2533IDAR 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 MSP430FR2533IDAR?
For technical support, including MSP430FR2533IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR2533IDAR requirements.
6.How does Aetrix verify that MSP430FR2533IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR2533IDAR 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 MSP430FR2533IDAR meets industry standards.
7.What is the process for return or replacement of MSP430FR2533IDAR?
All MSP430FR2533IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR2533IDAR, 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 MSP430FR2533IDAR part is unused and in its original packaging.
Return procedure for MSP430FR2533IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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