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Texas Instruments MSP430FR5731IRHAT
- Part No.:
- MSP430FR5731IRHAT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR5731IRHAT.pdf
- Description:
- IC MCU 16BIT 4KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
MSP430FR5731IRHAT from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 4KB FRAM nonvolatile memory, 1KB RAM, and integrated peripherals including a 10-bit ADC (12 external + 2 internal channels), 16-channel analog comparator, dual eUSCI modules (UART/IrDA/SPI/I²C), RTC with calendar, five 16-bit timers, and hardware multiplier - designed for battery-powered sensor nodes in industrial monitoring and smart metering.
For engineers reviewing the MSP430FR5731IRHAT datasheet, MSP430FR5731IRHAT pinout, MSP430FR5731IRHAT application, or MSP430FR5731IRHAT equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), LPM3.5 RTC current (1.5 µA), 8-MHz DCO clock accuracy, 2–3.6 V supply range, and RHA 40-pin QFN package compatibility with TI's MSP-TS430RHA40A target board.
Technical Context
The MSP430FR5731IRHAT implements the MSP430xV2 CPU core with unified FRAM memory architecture enabling simultaneous read/write operations and eliminating erase-before-write delays. Its power management system includes an integrated LDO, SVS with reset, and zero-power brownout detection - supporting seven low-power modes optimized for intermittent sensing duty cycles.
Peripherals are tightly coupled via three-channel DMA and share clock domains (MCLK, SMCLK, ACLK) sourced from DCO, VLO, LFXT, or HFXT oscillators. The eUSCI_A0/A1 and eUSCI_B0 modules support concurrent UART bootloading, I²C sensor interfacing, and SPI flash communication without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| FRAM Size | 4 KB - nonvolatile program/data storage with 125 ns/word write speed and no erase cycle required. |
| RAM Size | 1 KB - volatile working memory for stack, variables, and real-time buffering. |
| CPU Speed | Up to 8 MHz - supports deterministic real-time control at ultra-low active current (81.4 µA/MHz). |
| ADC Resolution | 10-bit - delivers 200 ksps sampling at 100 µA, suitable for precision analog sensor digitization. |
| Low-Power Mode LPM3.5 | 1.5 µA - enables RTC operation with 32-kHz crystal while retaining full FRAM/RAM content. |
| Supply Voltage Range | 2.0 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, or two-cell alkaline battery systems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in harsh environments. |
Pinout & Package
VQFN-40 (RHA) package with 6 mm × 6 mm body size and exposed thermal pad (recommended connection to DVSS). Pin count and signal mapping match MSP430FR5721/FR5725/FR5729 RHA variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function I/O | Primary ADC channel A0 input, RTC calibration output, DMA trigger source, and negative reference voltage input. |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | Multi-function I/O | ADC channel A1 input, external reference voltage input (VeREF+), and comparator output routing point. |
| PJ.4/XIN & PJ.5/XOUT | Clock Input/Output | Connects to 32-kHz crystal for RTC accuracy or high-frequency crystal for system clock; requires external load capacitors. |
| RST/NMI/SBWTDIO | Reset & Debug | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire debug data line. |
| TEST/SBWTCK | Debug Clock | Input-only Spy-Bi-Wire clock for programming and debugging; must be pulled high during normal operation. |
| VCORE | Core Power | Internal LDO output node - decoupling capacitor required between VCORE and DVSS for stable core voltage regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 4 KB nonvolatile memory with 10¹⁵ write endurance, radiation resistance, and zero write latency - eliminates flash wear leveling overhead. |
| Ultra-Low-Power RTC | Real-time clock with calendar and alarm functions operating at 1.5 µA in LPM3.5 - enables time-stamped sensor logging without waking CPU. |
| Hardware CRC Engine | 16-bit cyclic redundancy checker accelerates firmware integrity verification and data packet validation without CPU load. |
| Dual eUSCI Modules | eUSCI_A0 (UART/IrDA/SPI) + eUSCI_B0 (I²C/SPI) allow concurrent sensor bus (I²C) and wireless interface (UART) operation with independent clock domains. |
| Comparator_D with Hysteresis | 16-channel analog comparator with programmable hysteresis and internal voltage reference - supports threshold-based wake-up from LPM4.5. |
Applications
| Smart Utility Metering | Industrial Sensor Node |
|---|---|
Use Scenario: Battery-powered electricity/water/gas meter collecting pulse counts, temperature, and pressure at 15-minute intervals. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing FRAM-based data logging, and maintaining accurate time via RTC with 32-kHz crystal. Use Value: 1.5 µA LPM3.5 current extends 10-year battery life; FRAM enables secure, wear-free firmware updates and tamper-proof event logging. | Use Scenario: Wireless vibration/temperature/humidity sensor deployed in factory machinery for predictive maintenance. IC Role / Device Role / Timing Role: Signal acquisition front-end with 10-bit ADC and comparator-driven wake-up, then data preprocessing before BLE transmission. Use Value: Simultaneous ADC sampling and FRAM write at 200 ksps avoids data loss; 81.4 µA/MHz active mode minimizes energy per measurement cycle. |
| Home Automation Hub | Asset Tracking Beacon |
Use Scenario: Zigbee/Z-Wave gateway aggregating data from door/window sensors, motion detectors, and environmental monitors. IC Role / Device Role / Timing Role: Protocol translation engine using eUSCI_B0 (I²C) for local sensors and eUSCI_A0 (UART) for radio module communication. Use Value: Dual eUSCI modules enable concurrent peripheral and radio traffic without software arbitration; 2–3.6 V operation matches coin-cell and USB power sources. | Use Scenario: GPS-less indoor asset tracker using RSSI-based location and accelerometer-triggered reporting. IC Role / Device Role / Timing Role: Low-duty-cycle controller that wakes on motion (Comparator_D), samples accelerometer, logs timestamped events to FRAM, then transmits via sub-GHz RF. Use Value: 0.32 µA LPM4.5 shutdown current maximizes standby duration; FRAM retains last known position and sensor history across power cycles. |
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 |
|---|---|---|---|
| MSP430FR5732IRHAT | 8 KB FRAM, same package/peripherals - adds 4 KB nonvolatile storage for larger firmware or extended data buffers. | Better suited for applications requiring over-the-air firmware updates or multi-day sensor history retention. | Select when FRAM capacity >4 KB is needed without changing PCB layout or toolchain. |
| MSP430FR2476TRHAT | 16 KB FRAM, enhanced ADC (12-bit, 1-MSPS), but lacks RTC_B and second eUSCI_A - uses different pinout and lower-cost RHA variant. | Optimized for cost-sensitive, high-sample-rate sensor acquisition where RTC/calendar is not required. | Choose for new designs prioritizing ADC performance and memory density over legacy RTC compatibility. |
Compared with MSP430FR5732IRHAT, the MSP430FR5731IRHAT offers identical low-power operation and peripheral set at lower FRAM cost; versus MSP430FR2476TRHAT, it trades higher ADC resolution for guaranteed RTC functionality and dual UART support - critical for time-synced telemetry.
Availability
MSP430FR5731IRHAT is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, home automation hubs, and asset tracking beacons requiring stable component supply, long-term lifecycle support, and TI-qualified ultra-low-power performance.
Supply support for MSP430FR5731IRHAT 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 for industrial, automotive, and consumer markets.
The MSP430FR57xx family was engineered specifically for ultra-low-power sensing and system management in building automation, smart grid infrastructure, and battery-operated industrial IoT endpoints - emphasizing FRAM reliability and sub-µA real-time operation.
FAQ
What is the maximum operating frequency of the MSP430FR5731IRHAT?
The MSP430FR5731IRHAT supports a maximum system clock frequency of 8 MHz via its digitally controlled oscillator (DCO), factory-trimmed across six selectable frequencies. This allows deterministic real-time execution while maintaining ultra-low active current consumption of 81.4 µA/MHz - critical for energy-constrained applications like wireless sensor nodes where the MSP430FR5731IRHAT operates continuously in burst-mode sensing.
Does the MSP430FR5731IRHAT include a hardware real-time clock (RTC)?
Yes, the MSP430FR5731IRHAT integrates RTC_B - a calendar-mode real-time clock with alarm, calibration, and battery-backup capability. It operates in LPM3.5 with a typical current draw of 1.5 µA when driven by a 32-kHz crystal connected to PJ.4/XIN and PJ.5/XOUT. This enables precise time-stamping of sensor data and scheduled wake-up events without CPU intervention - a core feature distinguishing the MSP430FR5731IRHAT from basic timer-based alternatives.
How much FRAM and RAM does the MSP430FR5731IRHAT provide?
The MSP430FR5731IRHAT provides 4 KB of ferroelectric RAM (FRAM) for nonvolatile program code, configuration data, and event logs - with 10¹⁵ write-cycle endurance and 125 ns write speed - plus 1 KB of volatile RAM for runtime variables and stack operations. This memory architecture eliminates flash erase delays and wear-out concerns, making the MSP430FR5731IRHAT ideal for field-upgradable devices where frequent parameter writes occur.
Which communication interfaces are supported by the MSP430FR5731IRHAT?
The MSP430FR5731IRHAT features two enhanced universal serial communication interfaces: eUSCI_A0 supports UART (with automatic baud-rate detection), IrDA, and SPI; eUSCI_A1 supports UART and SPI; eUSCI_B0 supports I²C (with multi-slave addressing) and SPI. These enable concurrent sensor bus (I²C), radio interface (UART), and external memory (SPI) connectivity - a key capability confirmed in the MSP430FR5731IRHAT functional block diagram and peripheral description.
What package type and pin count does the MSP430FR5731IRHAT use?
The MSP430FR5731IRHAT is packaged in a 40-pin VQFN (RHA) with 6 mm × 6 mm body size and an exposed thermal pad. Its pinout matches the MSP430FR5721/FR5725/FR5729 RHA variants, enabling shared PCB design and tooling - verified in TI's SLASE35C datasheet Figures 4-1 and 4-2. This package supports full peripheral access including dual eUSCI modules, 16-channel comparator inputs, and 32 GPIOs.
MSP430FR5731IRHAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-VFQFN Exposed Pad
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- 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:
MSP430FR5731IRHAT FAQ
1.How can I place an order for MSP430FR5731IRHAT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5731IRHAT 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 MSP430FR5731IRHAT reliable?
The price and inventory of MSP430FR5731IRHAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5731IRHAT is usually 5 days.
3.What payment methods are accepted for MSP430FR5731IRHAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5731IRHAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5731IRHAT?
MSP430FR5731IRHAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5731IRHAT 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 MSP430FR5731IRHAT?
For technical support, including MSP430FR5731IRHAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5731IRHAT requirements.
6.How does Aetrix verify that MSP430FR5731IRHAT is sourced from the original manufacturer or authorized distributors?
All MSP430FR5731IRHAT 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 MSP430FR5731IRHAT meets industry standards.
7.What is the process for return or replacement of MSP430FR5731IRHAT?
All MSP430FR5731IRHAT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5731IRHAT, 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 MSP430FR5731IRHAT part is unused and in its original packaging.
Return procedure for MSP430FR5731IRHAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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