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Texas Instruments MSP430FR5947IRHAR
- Part No.:
- MSP430FR5947IRHAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR5947IRHAR.pdf
- Description:
- IC MCU 16BIT 32KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
MSP430FR5947IRHAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB nonvolatile memory, 1KB RAM, and integrated peripherals including 12-bit ADC (14 external channels), RTC with calendar, five 16-bit timers, AES-256 encryption, and dual eUSCI modules supporting UART, SPI, and I²C. It operates from 1.8 V to 3.6 V and targets energy-constrained sensor nodes and metering applications.
For engineers reviewing the MSP430FR5947IRHAR datasheet, MSP430FR5947IRHAR pinout, MSP430FR5947IRHAR application, or MSP430FR5947IRHAR equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), LPM3.5 RTC current (0.25 µA typical), LFXT-only clock architecture, 40-pin VQFN package, and UART/I²C bootloader support.
Technical Context
The MSP430FR5947IRHAR implements the ULP CPUXV2 core with 16 registers and supports seven low-power modes, including LPM3.5 (RTC active) and LPM4.5 (shutdown at 0.02 µA). Its FRAM memory replaces flash and SRAM, enabling unified program/data/storage space with near-SRAM write speed (125 ns/word) and radiation resistance.
It integrates a 12-bit ADC with internal reference and sample-and-hold, 16-channel analog comparator, three-channel DMA, 32-bit hardware multiplier, and real-time clock with calendar and alarm functions-all clocked by the low-frequency crystal oscillator (LFXT) only, as HFXT is not supported in this variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2, up to 16 MHz clock |
| FRAM Capacity | 32 KB nonvolatile memory with 10¹⁵ write endurance |
| RAM Size | 1 KB SRAM for volatile data and stack operations |
| ADC Resolution | 12-bit SAR ADC with 14 external input channels and internal reference |
| RTC Support | Real-time clock with calendar, alarm, and 32-kHz crystal interface (LFXT only) |
| Low-Power Mode LPM3.5 | 0.25 µA typical current with RTC running - enables battery-powered timekeeping |
| Supply Voltage Range | 1.8 V to 3.6 V - compatible with coin-cell and single Li-ion systems |
| Security Engine | Hardware AES-256 coprocessor for encryption/decryption and random number seed generation |
Pinout & Package
This device is housed in a 40-pin VQFN (RHA) package measuring 6 mm × 6 mm with an exposed thermal pad recommended to be connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0/C0/VREF-/VeREF- | Multi-function I/O | RTC calibration output, ADC channel A0, comparator C0, negative reference source/sink |
| P1.1/TA0.2/TA1CLK/COUT/A1/C1/VREF+/VeREF+ | Multi-function I/O | RTC clock input option, ADC channel A1, comparator output, positive reference source/sink |
| PJ.4/LFXIN | Crystal Input | Connects to 32.768 kHz crystal for RTC and low-power timing |
| PJ.5/LFXOUT | Crystal Output | Completes LFXT oscillator circuit with external 32.768 kHz crystal |
| P2.0/TB0.6/UCA0TXD/UCA0SIMO/TB0CLK/ACLK | UART/SPI/Timer/ACLK | Primary UART transmit line, SPI master out, timer clock source, and ACLK output |
| P2.1/TB0.0/UCA0RXD/UCA0SOMI/TB0.0 | UART/SPI/Timer | Primary UART receive line, SPI master in, and timer capture input |
| RST/NMI/SBWTDIO | Reset/Debug | Active-low reset, non-maskable interrupt, and bidirectional JTAG/SBW debug I/O |
| TEST/SBWTCK | Debug Clock | Test clock input for Spy-Bi-Wire programming and debugging interface |
| DVCC / DVSS | Power Supply | Digital core supply (DVCC) and ground (DVSS) - decoupling critical for low-noise operation |
| AVCC / AVSS | Analog Supply | Separate analog power and ground - required for ADC and comparator accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 32 KB unified memory with 125 ns write speed and 10¹⁵ endurance - eliminates flash wear-out and erase delays |
| Ultra-Low-Power RTC | 0.25 µA typical current in LPM3.5 mode with calendar and alarm - enables multi-year coin-cell operation |
| Capacitive Touch I/O | All GPIO pins support capacitive touch sensing without external components - reduces BOM and layout complexity |
| Hardware AES-256 | Dedicated encryption/decryption coprocessor with RNG seed - accelerates secure firmware updates and data logging |
| eUSCI Peripherals | Dual eUSCI modules: eUSCI_A0 (UART/SPI) and eUSCI_B0 (I²C/SPI) - supports simultaneous serial protocols with hardware BSL |
| 12-Bit ADC with Ref | 14-channel ADC with internal 1.5 V/2.5 V reference and sample-and-hold - enables precision sensor interfacing in compact designs |
Applications
| Smart Utility Metering | Energy-Harvested Sensor Node |
|---|---|
Use Scenario: Battery- or solar-powered gas/water/electricity meters requiring decade-long operation and tamper-resistant data logging. IC Role / Device Role / Timing Role: Main system controller managing metrology ADC sampling, FRAM-based secure event logging, and RTC-driven billing intervals. Use Value: 32KB FRAM stores 10+ years of hourly consumption data with 10¹⁵ write cycles; LPM3.5 RTC draws only 0.25 µA to maintain accurate billing timestamps. | Use Scenario: Wireless environmental sensors powered by piezoelectric or thermoelectric harvesters with intermittent energy availability. IC Role / Device Role / Timing Role: Ultra-low-power system manager that wakes on sensor threshold, samples analog inputs, processes data, and transmits via UART to LPWAN radio. Use Value: Active mode current of ~100 µA/MHz and sub-µA standby enable reliable operation under microwatt harvesting budgets. |
| Wearable Health Monitor | Industrial Data Logger |
Use Scenario: Compact wearable devices measuring heart rate, temperature, and motion using analog front-end sensors and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Central MCU handling analog sensor acquisition (ADC/comparator), real-time activity tracking (RTC/timers), and secure data storage before BLE transmission. Use Value: Integrated AES-256 encrypts biometric logs in FRAM; capacitive touch I/O enables bezel-free buttonless UI design. | Use Scenario: Ruggedized field loggers capturing vibration, temperature, and humidity in oil/gas or manufacturing settings with long deployment cycles. IC Role / Device Role / Timing Role: Autonomous data acquisition engine performing scheduled sampling, CRC-verified storage, and timestamped FRAM writes independent of host control. Use Value: 16-bit CRC peripheral validates data integrity during power-loss events; radiation-resistant FRAM ensures reliability in high-EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power FRAM microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR59471IRHAR | I²C-capable BSL (P1.6/P1.7), same FRAM/RAM/peripherals; differs only in bootloader interface | Suitable where I²C-based firmware updates are preferred over UART | Select when system already uses I²C for host communication and requires BSL compatibility |
| MSP430FR5948IRHAR | 48 KB FRAM (vs. 32 KB), identical package, clocking, and peripheral set | Better suited for applications needing larger code footprint or extended data buffering | Choose when firmware size exceeds 32 KB or long-duration ring-buffer logging is required |
Compared with MSP430FR5947IRHAR, the MSP430FR59471IRHAR offers I²C bootloader access without changing PCB layout, while MSP430FR5948IRHAR provides 16 KB more FRAM for complex algorithms or extended logging - both share identical pinout, power profile, and LFXT-only timing architecture.
Availability
MSP430FR5947IRHAR is available at Aetrix Electronics and suitable for smart utility metering, energy-harvested sensor nodes, and wearable electronics requiring stable component supply across multi-year production cycles.
Supply support for MSP430FR5947IRHAR 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 personal electronics markets.
The MSP430FR59xx family delivers ultra-low-power mixed-signal microcontrollers built around FRAM technology, targeting battery- and energy-harvested applications where endurance, speed, and microamp-level sleep currents are critical.
FAQ
What is the maximum operating frequency of the MSP430FR5947IRHAR?
The MSP430FR5947IRHAR supports a maximum system clock frequency of 16 MHz using its digitally controlled oscillator (DCO). This frequency is achievable across the full 1.8 V–3.6 V supply range and enables fast FRAM writes (125 ns per word) and real-time signal processing in active mode.
Does the MSP430FR5947IRHAR support high-frequency crystal oscillation (HFXT)?
No, the MSP430FR5947IRHAR does not support HFXT. It is part of the MSP430FR594x series, which is explicitly limited to low-frequency crystal oscillator (LFXT) operation for RTC and low-power timing. HFXT functionality is reserved for MSP430FR595x and MSP430FR596x variants.
How many ADC input channels does the MSP430FR5947IRHAR provide?
The MSP430FR5947IRHAR features a 12-bit ADC12_B module with 14 external analog input channels (A0–A13) plus two internal channels (temperature sensor and VREF). This configuration is confirmed in Table 3-1 of the SLAS704G datasheet for the FR594x family.
What bootloader interfaces are supported on the MSP430FR5947IRHAR?
The MSP430FR5947IRHAR supports a UART-based hardware bootloader (BSL) accessible via P2.0 (BSLTX) and P2.1 (BSLRX). Unlike the MSP430FR59471IRHAR, it does not implement I²C BSL - its BSL is UART-only, as specified in the device comparison table and pin function documentation.
Is the MSP430FR5947IRHAR pin-compatible with other devices in the MSP430FR594x family?
Yes, the MSP430FR5947IRHAR is pin-compatible with all 40-pin RHA-packaged MSP430FR594x devices, including MSP430FR59471IRHAR, MSP430FR5948IRHAR, and MSP430FR5949IRHAR. They share identical pin count, physical dimensions, and pin functions - enabling drop-in replacement for FRAM capacity or bootloader interface changes.
MSP430FR5947IRHAR 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:
- 16MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 14x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5947IRHAR FAQ
1.How can I place an order for MSP430FR5947IRHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5947IRHAR 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 MSP430FR5947IRHAR reliable?
The price and inventory of MSP430FR5947IRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5947IRHAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5947IRHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5947IRHAR transactions.
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4.How is shipping managed for MSP430FR5947IRHAR?
MSP430FR5947IRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5947IRHAR 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 MSP430FR5947IRHAR?
For technical support, including MSP430FR5947IRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5947IRHAR requirements.
6.How does Aetrix verify that MSP430FR5947IRHAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5947IRHAR 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 MSP430FR5947IRHAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5947IRHAR?
All MSP430FR5947IRHAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5947IRHAR, 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 MSP430FR5947IRHAR part is unused and in its original packaging.
Return procedure for MSP430FR5947IRHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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