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Texas Instruments MSP430FR5721IRHAR
- Part No.:
- MSP430FR5721IRHAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR5721IRHAR.pdf
- Description:
- IC MCU 16BIT 4KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430FR5721IRHAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller featuring 4KB nonvolatile memory, 1KB RAM, 12-channel 10-bit ADC, 16-channel analog comparator, and dual eUSCI modules (UART/IrDA/SPI + I²C/SPI) in a 40-pin VQFN package. It operates from 2 V to 3.6 V across –40°C to 85°C and targets battery-powered sensor nodes requiring fast write endurance and RTC-based data logging.
For engineers reviewing the MSP430FR5721IRHAR datasheet, MSP430FR5721IRHAR pinout, MSP430FR5721IRHAR application, or MSP430FR5721IRHAR equivalent, key selection criteria include FRAM write cycle endurance (10¹⁵), LPM3.5 RTC current (1.5 µA), 4KB memory size versus family variants, and RHA-package pin compatibility with MSP430FR5723/FR5725/FR5729.
Technical Context
The MSP430FR5721IRHAR integrates a 16-bit CPUXV2 core with hardware multiplier and three-channel DMA, enabling deterministic real-time processing in low-power modes. Its FRAM architecture eliminates erase cycles and supports byte-level writes at 125 ns/word - critical for frequent sensor data buffering without wear leveling overhead.
It features two independent timer blocks (Timer_A with dual 3-CC instances, Timer_B with triple 3-CC instances), RTC with calendar/alarm, and dual eUSCI peripherals supporting simultaneous UART bootloading and I²C sensor communication - all managed via a flexible clock system with DCO, VLO, LFXT, and HFXT sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| FRAM Size | 4 KB - persistent program/data storage with 10¹⁵ write cycles; eliminates flash wear-out concerns in data-logging applications. |
| ADC Resolution | 10-bit - supports precision analog sensing (e.g., temperature, voltage) with internal reference and sample-and-hold. |
| Operating Voltage | 2 V to 3.6 V - enables direct operation from single Li-ion or dual alkaline cells without external regulators. |
| LPM3.5 Current | 1.5 µA (typ.) - enables years of battery life in RTC-critical applications like smart metering or environmental monitors. |
| Max Clock Speed | 8 MHz - sufficient for real-time control loops and serial protocol handling while maintaining sub-100 µA/MHz active power. |
| Package | VQFN-40 (6 mm × 6 mm) - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
| eUSCI Peripherals | eUSCI_A0/A1 (UART/IrDA/SPI), eUSCI_B0 (I²C/SPI) - supports concurrent wired communication with multiple sensors and host systems. |
Pinout & Package
VQFN-40 (RHA) package with exposed thermal pad (recommended connection to DVSS). Pin count and layout match MSP430FR5723IRHAR, MSP430FR5725IRHAR, and MSP430FR5729IRHAR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function I/O | Primary RTC calibration output and ADC channel A0 input; enables time-stamped sensor sampling with hardware-triggered DMA transfers. |
| PJ.4/XIN & PJ.5/XOUT | Crystal oscillator terminals | Supports 32-kHz crystal for precision RTC operation; required for LPM3.5 mode with calendar functionality. |
| RST/NMI/SBWTDIO | Reset & debug interface | Single-pin Spy-Bi-Wire debug entry; allows in-system programming and real-time debugging without dedicated JTAG header. |
| eUSCI_A0 TX/RX (P2.0/P2.1) | UART physical layer | Hardware UART with automatic baud-rate detection - simplifies host communication setup in field-deployed devices. |
| eUSCI_B0 SCL/SDA (P1.6/P1.7) | I²C bus interface | Standard-mode I²C master/slave - directly interfaces with digital temperature, humidity, or motion sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 4 KB nonvolatile memory with 125 ns write speed and 10¹⁵ endurance - enables reliable, high-frequency data logging without flash erase delays or wear management firmware. |
| Ultra-Low-Power Modes | LPM3.5 draws only 1.5 µA with RTC active - extends coin-cell battery life to >10 years in periodic wake-up sensor applications. |
| Integrated Analog Front-End | 12-channel 10-bit ADC + 16-channel comparator with programmable hysteresis - supports multi-sensor signal conditioning and threshold-triggered wake-up without external components. |
| Dual eUSCI Modules | eUSCI_A0/A1 support UART/IrDA/SPI; eUSCI_B0 supports I²C/SPI - enables simultaneous communication with host (UART) and local sensors (I²C) without software arbitration. |
| Hardware Acceleration | 32-bit hardware multiplier and three-channel DMA - offloads math-intensive tasks (e.g., FFT, filtering) and memory transfers from CPU, reducing active time and power. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered electricity/water/gas meters collecting hourly consumption data with tamper detection. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing FRAM-based data history, and driving RTC-corrected timestamping. Use Value: 4KB FRAM stores >30 days of 15-minute interval readings; LPM3.5 current ensures >15-year battery life with CR2032 cell. | Use Scenario: Indoor environmental monitor measuring temperature, humidity, and CO₂ using I²C sensors and transmitting via UART to gateway. IC Role / Device Role / Timing Role: Central sensor aggregator with hardware-triggered ADC sampling and I²C peripheral control. Use Value: Dual eUSCI modules enable concurrent sensor polling (I²C) and host reporting (UART); 10-bit ADC resolves <0.1°C temperature changes. |
| Industrial Condition Monitoring | Asset Tracking Beacon |
Use Scenario: Vibration and temperature monitoring on motors/pumps with edge analytics and alert generation. IC Role / Device Role / Timing Role: Real-time signal processor using Timer_A/B for PWM-driven actuator control and DMA-accelerated FFT preprocessing. Use Value: Hardware multiplier reduces FFT computation time by 8× vs. software-only; FRAM retains fault logs across power loss. | Use Scenario: GPS-denied indoor asset tracker using accelerometer wake-up, BLE interface, and location fingerprinting. IC Role / Device Role / Timing Role: Low-duty-cycle supervisor managing motion-triggered wake-up, sensor readout, and BLE packet preparation. Use Value: Comparator_D with programmable hysteresis detects motion events with <5 µA standby current; RTC schedules periodic BLE advertisements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5725IRHAR | 8 KB FRAM, same 40-pin RHA package, identical peripherals and pinout. | Higher memory capacity supports larger firmware images or extended data buffers without changing PCB layout. | Select when firmware size exceeds 4 KB or long-term data retention beyond 30 days is required. |
| MSP430FR5729IRHAR | 16 KB FRAM, same RHA package, identical peripherals and pinout. | Maximum FRAM in family enables complex state machines, OTA update staging, or secure key storage. | Choose for future-proofing or applications requiring >8 KB persistent storage with no hardware redesign. |
Compared with MSP430FR5725IRHAR and MSP430FR5729IRHAR, the MSP430FR5721IRHAR provides optimal cost/performance balance for mid-complexity sensor nodes where 4 KB FRAM suffices - avoiding over-provisioning while retaining full pin and software compatibility within the RHA-family footprint.
Availability
MSP430FR5721IRHAR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, industrial condition monitoring, and asset tracking applications requiring stable component supply, long-lifecycle assurance, and TI-qualified FRAM reliability.
Supply support for MSP430FR5721IRHAR 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 and embedded processing solutions for industrial, automotive, and consumer markets.
The MSP430FR57xx family was designed specifically for ultra-low-power sensing and system management in building automation, smart grid infrastructure, and industrial IoT endpoints - prioritizing FRAM endurance, RTC accuracy, and mixed-signal integration.
FAQ
What is the maximum operating frequency of the MSP430FR5721IRHAR?
The MSP430FR5721IRHAR supports a maximum system clock frequency of 8 MHz, achieved via its factory-trimmed DCO oscillator or external crystal sources (LFXT/HFXT). This speed enables real-time execution of sensor fusion algorithms and serial protocol handling while maintaining active-mode current below 81.4 µA/MHz - critical for energy-constrained deployments where computational throughput must be balanced against battery life.
Does the MSP430FR5721IRHAR support hardware UART bootloading?
Yes, the MSP430FR5721IRHAR includes a hardware UART bootloader (BSL) accessible via eUSCI_A0 or eUSCI_A1. This allows field firmware updates over standard UART connections without requiring JTAG/Spy-Bi-Wire hardware - simplifying maintenance for deployed devices. The BSL is protected by password security and supports memory verification, making it suitable for secure remote upgrades in the MSP430FR5721IRHAR-based systems.
How much FRAM and RAM does the MSP430FR5721IRHAR integrate?
The MSP430FR5721IRHAR integrates 4 KB of ferroelectric RAM (FRAM) for nonvolatile program and data storage, and 1 KB of volatile RAM for runtime variables and stack operations. The FRAM offers byte-level write capability, 125 ns write speed, and 10¹⁵ endurance - eliminating flash erase limitations. This memory configuration is optimized for compact firmware images and moderate data-logging depth in the MSP430FR5721IRHAR's target applications.
What low-power modes are available on the MSP430FR5721IRHAR?
The MSP430FR5721IRHAR supports seven low-power modes (LPM0–LPM4.5), including LPM3.5 with RTC active at 1.5 µA (typ.) and LPM4.5 shutdown at 0.32 µA (typ.). These modes leverage FRAM's instant-on capability and intelligent peripheral gating to minimize wake-up latency and energy per event - essential for battery-powered MSP430FR5721IRHAR applications where duty cycles are sub-1%.
Is the MSP430FR5721IRHAR pin-compatible with other devices in the FR572x family?
Yes, the MSP430FR5721IRHAR in the RHA package is pin-compatible with MSP430FR5723IRHAR, MSP430FR5725IRHAR, and MSP430FR5729IRHAR - sharing identical 40-pin VQFN footprints and signal assignments. This allows hardware reuse across product tiers; firmware can be scaled upward to 8 KB or 16 KB FRAM variants without PCB revision, provided the application leverages only the common peripheral set defined for the RHA-pinout group.
MSP430FR5721IRHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-VFQFN Exposed Pad
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 14x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5721IRHAR FAQ
1.How can I place an order for MSP430FR5721IRHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5721IRHAR 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 MSP430FR5721IRHAR reliable?
The price and inventory of MSP430FR5721IRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5721IRHAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5721IRHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5721IRHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5721IRHAR?
MSP430FR5721IRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5721IRHAR 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 MSP430FR5721IRHAR?
For technical support, including MSP430FR5721IRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5721IRHAR requirements.
6.How does Aetrix verify that MSP430FR5721IRHAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5721IRHAR 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 MSP430FR5721IRHAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5721IRHAR?
All MSP430FR5721IRHAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5721IRHAR, 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 MSP430FR5721IRHAR part is unused and in its original packaging.
Return procedure for MSP430FR5721IRHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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