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Texas Instruments MSP430FR5947IDAR
- Part No.:
- MSP430FR5947IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR5947IDAR.pdf
- Description:
- IC MCU 16BIT 32KB FRAM 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,408
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Product details
Overview
MSP430FR5947IDAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB nonvolatile memory, 1KB RAM, and integrated 12-bit ADC (14 external channels), RTC, AES-128/256 encryption, and dual eUSCI modules (UART/I²C/SPI). It operates from 1.8 V to 3.6 V and targets energy-constrained sensor nodes requiring long battery life and secure data logging.
For engineers reviewing the MSP430FR5947IDAR datasheet, MSP430FR5947IDAR pinout, MSP430FR5947IDAR application, or MSP430FR5947IDAR equivalent, this page delivers verified functional roles, low-power mode current values, FRAM endurance specs, real-time clock capability with LFXT support, and UART/I²C bootloader configuration - all confirmed for the TSSOP-38 package variant.
Technical Context
The MSP430FR5947IDAR implements the CPUXV2 16-bit RISC core with hardware multiplier and 3-channel DMA, enabling deterministic real-time control in active and LPM modes. Its clock system integrates DCO, VLO, and LFXT (32-kHz crystal) - with RTC_B module enabled only when LFXT is used, as confirmed for FR594x devices.
FRAM memory architecture provides unified program/data/storage space with 125 ns per-word write speed and 10¹⁵ write-cycle endurance. Analog subsystem includes 16-channel comparator and ADC12_B with internal reference, sample-and-hold, and up to 14 external analog inputs - consistent across MSP430FR5947 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | CPUXV2 16-bit RISC, up to 16 MHz clock - enables deterministic timing-critical firmware execution |
| FRAM Size | 32 KB nonvolatile memory - supports code + data + logging in single address space with no erase latency |
| RAM Size | 1 KB SRAM - sufficient for stack, buffers, and real-time variables during active/LPM operation |
| ADC Resolution | 12-bit ADC12_B with 14 external input channels - meets precision requirements for sensor signal acquisition |
| RTC Support | RTC_B with calendar/alarm functions - requires LFXT crystal (32 kHz) and is active in LPM3.5 (0.25 µA typical) |
| Low-Power Modes | LPM3.5 (0.25 µA), LPM4.5 (0.02 µA) - enables multi-year battery life in metering and wearable applications |
| Security | AES-128/256 coprocessor with random number seed - accelerates encrypted firmware updates and secure data storage |
Pinout & Package
TSSOP-38 package (12.5 mm × 6.2 mm), thermally enhanced with exposed pad recommended for grounding. Pin count and I/O mapping match DA package variant per TI SLAS704G datasheet.
| 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, and DMA trigger source - critical for time-synced sensing |
| P1.1/TA0.2/TA1CLK/COUT/A1/C1/VREF+/VeREF+ | Multi-function I/O | Positive reference voltage output, ADC channel A1, comparator output - enables ratiometric sensor measurements |
| P3.0–P3.3/A12–A15/C12–C15 | Analog input group | Four dedicated ADC inputs with comparator pairing - supports multi-sensor analog front-end without external mux |
| P1.3/TA1.2/UCB0STE/A3/C3 | SPI slave enable | eUSCI_B0 SPI slave transmit enable - simplifies daisy-chain sensor interface with minimal GPIO overhead |
| P2.0/UCA0TXD/UCA0SIMO/TB0CLK/ACLK | UART TX / SPI master out | Primary serial debug and host communication path - supports BSL UART bootloading |
| P2.1/UCA0RXD/UCA0SOMI | UART RX / SPI master in | Full-duplex UART interface with automatic baud-rate detection - reduces host-side configuration complexity |
| RST/NMI/SBWTDIO | Reset & debug I/O | Combined reset, non-maskable interrupt, and Spy-Bi-Wire debug I/O - enables in-system programming with 2-wire interface |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 32 KB unified memory with 125 ns write speed and 10¹⁵ endurance - eliminates flash wear-out in frequent logging applications |
| Ultra-Low-Power RTC | Real-time clock with calendar and alarm in LPM3.5 at 0.25 µA - enables precise wake-up scheduling without external RTC IC |
| Capacitive Touch I/O | All pins support capacitive touch sensing without external components - reduces BOM cost and PCB area for user interface |
| Hardware AES Encryption | Dedicated 128/256-bit AES coprocessor with RNG seed - offloads encryption from CPU, preserving low-power budget |
| eUSCI Serial Peripherals | eUSCI_A0 (UART/IrDA/SPI) and eUSCI_B0 (I²C/SPI) - supports dual-protocol connectivity for sensor hub and cloud gateway interfaces |
Applications
| Smart Utility Metering | Energy-Harvesting Sensor Node |
|---|---|
Use Scenario: Gas/water/electricity meter with tamper detection, pulse counting, and hourly consumption logging. IC Role / Device Role / Timing Role: Primary controller managing metrology ADC, RTC-based timestamping, FRAM-based secure log storage, and UART/RS-485 communication. Use Value: 32KB FRAM retains 10+ years of hourly logs with zero write wear; LPM4.5 (0.02 µA) extends battery life beyond 15 years. |
Use Scenario: Wireless environmental sensor node powered by solar cell or thermoelectric generator. IC Role / Device Role / Timing Role: System-on-chip managing analog sensor conditioning, duty-cycled sampling, RF wakeup, and secure BLE packet prep. Use Value: Unified FRAM stores calibration coefficients and transient sensor data without erase cycles; AES-256 secures OTA firmware updates. |
| Wearable Health Monitor | Industrial Data Logger |
Use Scenario: ECG/PPG patch with motion compensation, real-time heart rate calculation, and local event-triggered storage. IC Role / Device Role / Timing Role: Signal acquisition MCU with ADC oversampling, digital filtering, capacitive touch UI, and Bluetooth LE interface. Use Value: All I/O pins support capacitive touch - enables buttonless design; 1KB RAM accommodates real-time DSP buffers without external memory. |
Use Scenario: Ruggedized temperature/humidity/vibration logger for predictive maintenance in factory settings. IC Role / Device Role / Timing Role: Autonomous data collector with RTC-triggered sampling, CRC-16 integrity checks, and SD card or USB host interface. Use Value: 16-channel comparator monitors multiple analog thresholds simultaneously; FRAM ensures crash-proof logging during power interruption. |
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 |
|---|---|---|---|
| MSP430FR5948IDAR | 48 KB FRAM, same 1 KB RAM, identical peripherals and pinout - differs only in memory size | Preferred where larger firmware image or extended data buffering is required | Select when firmware exceeds 32 KB or long-duration buffered logging is needed |
| MSP430FR59471IDAR | Same FRAM/RAM, but features I²C-capable BSL (P1.6/P1.7) instead of UART BSL (P2.0/P2.1) | Required when host system uses I²C for firmware updates and lacks UART interface | Choose when I²C-based bootloader integration is mandatory and UART is unavailable |
Compared with MSP430FR5947IDAR, the MSP430FR5948IDAR offers 50% more FRAM for complex algorithms or longer data retention, while MSP430FR59471IDAR trades UART BSL for I²C BSL - both retain identical low-power performance, ADC capability, and RTC functionality in the TSSOP-38 package.
Availability
MSP430FR5947IDAR is available at Aetrix Electronics and suitable for smart utility metering, energy-harvesting sensor nodes, and wearable electronics requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MSP430FR5947IDAR 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in ultra-low-power design.
The MSP430 ULP FRAM portfolio targets energy-constrained applications like metering and sensor networks, combining FRAM's endurance with a holistic low-power architecture - MSP430FR5947IDAR exemplifies this focus in the TSSOP-38 form factor.
FAQ
What is the maximum operating frequency of the MSP430FR5947IDAR?
The MSP430FR5947IDAR supports a maximum CPU clock frequency of 16 MHz using its factory-trimmed DCO or external HFXT oscillator. However, this device variant is configured for LFXT-only operation (32 kHz crystal), limiting high-frequency clock sources to the DCO. The 16 MHz rating applies to DCO-based active-mode execution, not crystal-driven timing.
Does the MSP430FR5947IDAR support hardware real-time clock functionality?
Yes, the MSP430FR5947IDAR includes the RTC_B module, which provides calendar, alarm, and periodic interrupt functions. It operates in LPM3.5 mode at 0.25 µA typical and requires connection of a 32-kHz crystal to PJ.4 (LFXIN) and PJ.5 (LFXOUT) - confirmed in TI SLAS704G Section 1.4 and Table 3-1.
What serial communication interfaces does the MSP430FR5947IDAR support?
The MSP430FR5947IDAR integrates two enhanced universal serial communication interfaces: eUSCI_A0 supports UART (with automatic baud-rate detection), IrDA, and SPI; eUSCI_B0 supports I²C (with multiple slave addressing) and SPI. Both modules are fully functional in the TSSOP-38 package.
How many analog input channels does the ADC12_B module on the MSP430FR5947IDAR support?
The ADC12_B module on the MSP430FR5947IDAR supports up to 14 external analog input channels (A0–A15, excluding A6 and A7 which are not routed to TSSOP-38 pins), plus 2 internal channels (temperature sensor and VREF). This matches the "14 ext, 2 int ch." specification in TI's Device Comparison Table 3-1.
Is the MSP430FR5947IDAR pin-compatible with other devices in the MSP430FR594x family?
Yes, the MSP430FR5947IDAR is pin-compatible with MSP430FR5948IDAR and MSP430FR59471IDAR in the TSSOP-38 (DA) package. All share identical pin numbering, electrical characteristics, and peripheral mapping - differing only in FRAM size (32 KB vs. 48 KB) and BSL interface (UART vs. I²C).
MSP430FR5947IDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 38-TSSOP (0.240", 6.10mm Width)
- 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:
- 31
- 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 12x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5947IDAR FAQ
1.How can I place an order for MSP430FR5947IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5947IDAR 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 MSP430FR5947IDAR reliable?
The price and inventory of MSP430FR5947IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5947IDAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5947IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5947IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5947IDAR?
MSP430FR5947IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5947IDAR 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 MSP430FR5947IDAR?
For technical support, including MSP430FR5947IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5947IDAR requirements.
6.How does Aetrix verify that MSP430FR5947IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5947IDAR 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 MSP430FR5947IDAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5947IDAR?
All MSP430FR5947IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5947IDAR, 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 MSP430FR5947IDAR part is unused and in its original packaging.
Return procedure for MSP430FR5947IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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