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Texas Instruments MSP430FR5721IRHAT
- Part No.:
- MSP430FR5721IRHAT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR5721IRHAT.pdf
- Description:
- IC MCU 16BIT 4KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
MSP430FR5721IRHAT from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 4KB FRAM nonvolatile memory, 1KB RAM, 12-channel 10-bit ADC, 16-channel analog comparator, and dual eUSCI modules supporting UART, SPI, and I²C. It operates from 2 V to 3.6 V across –40°C to 85°C and targets battery-powered sensor nodes requiring fast FRAM writes (125 ns/word), RTC calendar functions, and sub-µA standby current (6.3 µA in LPM3).
For engineers reviewing the MSP430FR5721IRHAT datasheet, MSP430FR5721IRHAT pinout, MSP430FR5721IRHAT application, or MSP430FR5721IRHAT equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), integrated hardware multiplier, three-channel DMA, real-time clock with crystal support, and RHA package compatibility with TI's MSP-TS430RHA40A target board.
Technical Context
The MSP430FR5721IRHAT implements the MSP430 CPUXV2 core with seven low-power modes, including LPM3.5 (RTC active with 32-kHz crystal) and LPM4.5 (shutdown at 0.32 µA). Its FRAM memory replaces flash and SRAM, enabling unified program/data/storage space with ECC and MPU protection.
Peripherals include two eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), five 16-bit timers (TA0/TA1/TB0/TB1/TB2), a 32-bit hardware multiplier, and a 16-channel comparator with programmable hysteresis and internal voltage reference - all optimized for deterministic timing and minimal power in intermittent-sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2, up to 8-MHz operation with DCO and external crystal support |
| FRAM Capacity | 4 KB nonvolatile memory with 125 ns/word write speed and 10¹⁵ write-cycle endurance |
| ADC | 10-bit SAR ADC with 12 external + 2 internal channels, 200 ksps sampling at 100 µA |
| Low-Power Modes | LPM3 (6.3 µA with VLO), LPM3.5 (1.5 µA with 32-kHz crystal RTC), LPM4.5 (0.32 µA shutdown) |
| Communication | eUSCI_A0/A1: UART/IrDA/SPI; eUSCI_B0: I²C/SPI; hardware UART bootloader (BSL) |
| Timers | Five 16-bit timers: TA0/TA1 (3 capture/compare registers each), TB0/TB1/TB2 (3,3,3 registers) |
| Supply Range | 2.0 V to 3.6 V; fully integrated LDO and supply voltage supervisor with brownout detection |
Pinout & Package
The MSP430FR5721IRHAT is housed in a 40-pin VQFN (RHA) package measuring 6 mm × 6 mm with exposed thermal pad recommended for connection to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function I/O | RTC calibration output, ADC channel A0 input, comparator CD0 input, DMA trigger source |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | Multi-function I/O | ADC reference input (VeREF+), comparator output, TA0/TA1 clock source |
| PJ.4/XIN & PJ.5/XOUT | Clock Input/Output | Connects to external 32-kHz crystal for RTC or high-frequency crystal for system clock |
| RST/NMI/SBWTDIO | Reset & Debug | Active-low reset, non-maskable interrupt, Spy-Bi-Wire data I/O for programming/debug |
| TEST/SBWTCK | Debug Clock | Spy-Bi-Wire clock input; enables JTAG pins when pulled high during power-up |
| VCORE | Core Power | Internal core voltage supply node; requires external 1.8-V regulation via integrated LDO |
Key Features
| Feature | Design Value |
|---|---|
| FRAM Memory Architecture | Unifies program, data, and storage in 4KB nonvolatile memory with zero-wait-state writes and ECC error correction |
| Ultra-Low-Power RTC | Real-time clock with calendar and alarm functions draws only 1.5 µA in LPM3.5 using 32-kHz crystal |
| Hardware Acceleration | 32-bit hardware multiplier and three-channel DMA enable efficient signal processing without CPU overhead |
| Analog Integration | 12-channel 10-bit ADC + 16-channel comparator with internal reference and programmable hysteresis reduce BOM count |
| Secure Bootloader | Hardware UART-based BSL allows field firmware updates without external programming voltage or debug interface |
Applications
| Smart Sensor Node | Energy Metering Interface |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data at 1-minute intervals with local data logging. IC Role / Device Role / Timing Role: Main controller executing sensor polling, FRAM-based circular buffer storage, RTC-triggered wake-up, and BLE subsystem coordination. Use Value: 4KB FRAM enables 10,000+ sensor records with 125 ns writes; LPM3.5 RTC maintains accurate timekeeping at 1.5 µA, extending 2000-mAh coin cell life beyond 5 years. | Use Scenario: Sub-metering module interfacing with shunt-based current sensors and optical pulse inputs in residential smart meters. IC Role / Device Role / Timing Role: Analog front-end manager acquiring synchronized voltage/current samples, computing RMS values, and timestamping events via RTC calendar. Use Value: 10-bit ADC supports 0.5% energy measurement accuracy; built-in comparator monitors threshold crossings for tamper detection without CPU intervention. |
| Wireless Building Automation | Industrial Condition Monitoring |
Use Scenario: Wireless thermostat node communicating via Zigbee or Sub-GHz RF, regulating HVAC based on occupancy and ambient conditions. IC Role / Device Role / Timing Role: System-on-chip managing sensor fusion (temp/humidity/motion), display backlight control, and secure OTA update handling. Use Value: Dual eUSCI modules support concurrent UART (RF module) and I²C (local sensors); FRAM retains configuration and calibration data across power cycles without wear-out concerns. | Use Scenario: Vibration and temperature monitoring node mounted on rotating machinery, transmitting predictive maintenance alerts over LoRaWAN. IC Role / Device Role / Timing Role: Edge processor performing FFT preprocessing on ADC samples, triggering alarms on spectral anomalies, and scheduling transmissions during low-activity windows. Use Value: 32-bit hardware multiplier accelerates FFT computation; LPM4.5 shutdown mode reduces quiescent current to 0.32 µA between 10-second acquisition bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5725IRHAT | 8KB FRAM, same 40-pin RHA package, identical peripherals and pinout | Supports larger firmware images and extended data logging buffers | Select when firmware size exceeds 4KB or long-term sensor history retention is required |
| MSP430FR5721IDA | Same 4KB FRAM and core specs, but in 38-pin TSSOP (DA) package | Lower-cost PCB assembly; reduced I/O count (30 vs. 32 pins) and no P4.x pins | Select for cost-sensitive, space-tolerant designs where thermal pad and QFN assembly are not preferred |
Compared with MSP430FR5725IRHAT, the MSP430FR5721IRHAT trades FRAM capacity for lower cost and smaller code footprint; compared with MSP430FR5721IDA, it offers superior thermal performance and higher I/O density in a compact 6×6 mm footprint ideal for space-constrained sensor modules.
Availability
MSP430FR5721IRHAT is available at Aetrix Electronics and suitable for smart sensor nodes, energy metering interfaces, and wireless building automation systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MSP430FR5721IRHAT 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 company 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 battery-operated IoT endpoints, combining FRAM reliability with deep-sleep efficiency and integrated analog front-ends.
FAQ
What is the maximum operating frequency of the MSP430FR5721IRHAT?
The MSP430FR5721IRHAT supports a maximum system clock frequency of 8 MHz, achieved using the factory-trimmed DCO oscillator or external high-frequency crystals via the HFXT module. This frequency is fully supported across the full operating voltage range (2.0 V to 3.6 V) and temperature range (–40°C to 85°C), enabling deterministic real-time execution for time-critical sensor sampling and communication tasks within the MSP430FR5721IRHAT.
Does the MSP430FR5721IRHAT include hardware encryption or secure boot features?
The MSP430FR5721IRHAT does not include dedicated hardware encryption engines (e.g., AES, SHA) or secure boot ROM. Security relies on software-implemented protocols and the Memory Protection Unit (MPU) to restrict access to FRAM regions. While the hardware UART bootloader (BSL) supports password-protected firmware updates, cryptographic operations must be implemented in firmware. For applications requiring certified security, designers should consider newer MSP430FR series variants or companion secure elements alongside the MSP430FR5721IRHAT.
Can the MSP430FR5721IRHAT drive an external crystal for the real-time clock?
Yes, the MSP430FR5721IRHAT supports external 32-kHz crystals for the real-time clock via PJ.4/XIN and PJ.5/XOUT pins. When configured in LFXT mode, the crystal enables LPM3.5 operation with typical current consumption of 1.5 µA while maintaining calendar and alarm functionality. The device includes internal load capacitors and supports crystal startup verification - critical for reliable timekeeping in battery-powered MSP430FR5721IRHAT deployments.
How many general-purpose I/O pins does the MSP430FR5721IRHAT provide in the RHA package?
The MSP430FR5721IRHAT in the 40-pin RHA package provides 32 general-purpose I/O pins distributed across Ports P1, P2, P3, P4, and PJ. All pins support interrupt generation and wake-up from low-power modes. Port mapping includes 8-bit P1/P2, 8-bit P3, 2-bit P4, and 6-bit PJ - with specific pins shared among timer, ADC, comparator, and communication functions as defined in the signal descriptions table for the MSP430FR5721IRHAT.
Is the MSP430FR5721IRHAT pin-compatible with other devices in the MSP430FR572x family?
Yes, the MSP430FR5721IRHAT is pin-compatible with other RHA-package variants in the MSP430FR572x family, including MSP430FR5725IRHAT and MSP430FR5729IRHAT. All share identical 40-pin VQFN footprints, power pin locations (DVCC/DVSS/AVCC/AVSS/VCORE), and peripheral pin mappings. Firmware portability is further enhanced by consistent register maps and memory organization - allowing hardware reuse across FRAM capacity tiers while maintaining the same PCB layout for the MSP430FR5721IRHAT.
MSP430FR5721IRHAT 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:
MSP430FR5721IRHAT FAQ
1.How can I place an order for MSP430FR5721IRHAT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5721IRHAT 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 MSP430FR5721IRHAT reliable?
The price and inventory of MSP430FR5721IRHAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5721IRHAT is usually 5 days.
3.What payment methods are accepted for MSP430FR5721IRHAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5721IRHAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5721IRHAT?
MSP430FR5721IRHAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5721IRHAT 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 MSP430FR5721IRHAT?
For technical support, including MSP430FR5721IRHAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5721IRHAT requirements.
6.How does Aetrix verify that MSP430FR5721IRHAT is sourced from the original manufacturer or authorized distributors?
All MSP430FR5721IRHAT 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 MSP430FR5721IRHAT meets industry standards.
7.What is the process for return or replacement of MSP430FR5721IRHAT?
All MSP430FR5721IRHAT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5721IRHAT, 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 MSP430FR5721IRHAT part is unused and in its original packaging.
Return procedure for MSP430FR5721IRHAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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