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Texas Instruments MSP430FR50431IRGCT
- Part No.:
- MSP430FR50431IRGCT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR50431IRGCT.pdf
- Description:
- IC MCU 16BIT 64KB FRAM 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,188
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Product details
Overview
MSP430FR50431IRGCT from Texas Instruments is an ultrasonic sensing microcontroller (MCU) with integrated USS_A analog front end, 64KB FRAM, 12-bit 8-MSPS sigma-delta ADC, and low-energy accelerator (LEA). It delivers ±12.5-ps dToF accuracy for water flow measurement and supports 15–1000-mm pipe diameters at <1 L/h minimum detectable flow. Designed for battery-powered smart meters, it achieves ~3 µA system current at 1 result/second.
For engineers reviewing the MSP430FR50431IRGCT datasheet, MSP430FR50431IRGCT pinout, MSP430FR50431IRGCT application, or MSP430FR50431IRGCT equivalent, key selection criteria include differential time-of-flight resolution, integrated PPG/PHY/PGA signal chain, FRAM endurance (10¹⁵ writes), LEA-accelerated FFT performance, and I²C bootloader support.
Technical Context
The MSP430FR50431IRGCT implements a dedicated ultrasonic sensing subsystem (USS_A) comprising a programmable pulse generator (PPG), low-impedance 4-Ω PHY driver, PGA (–6.5 dB to 30.8 dB), and high-speed SDHS ADC (8 Msps). Its PLL generates 68–80 MHz clocks for precise time measurement.
It integrates a 16-bit CPUXV2 core running up to 16 MHz, 12 KB RAM (8 KB shared with LEA), and metering-specific peripherals including MTIF (pulse gen/count, 200 nA in LPM3.5) and AES256 encryption. The device operates from 1.8 V to 3.6 V and supports LPM4.5 (30 nA shutdown).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2, up to 16 MHz clock - enables deterministic real-time ultrasonic signal processing with low latency. |
| Ultrasonic Sensing Engine | USS_A module with PPG, 4-Ω PHY, PGA (–6.5 dB to 30.8 dB), and 12-bit SDHS ADC @ 8 Msps - supports direct interface to 2.5 MHz transducers with optimized ZFD compensation. |
| Time Measurement Accuracy | ±12.5 ps dToF (water), ±250 ps dToF (gas) - enables ±1% flow accuracy across 500:1 dynamic range (water) and 200:1 (gas). |
| Memory | 64 KB FRAM + 12 KB RAM (8 KB shared with LEA) - provides unified nonvolatile storage with 125 ns/word write speed and 10¹⁵ write-cycle endurance. |
| Power Consumption | ~3 µA @ 1 result/sec (water mode), LPM3.5 = 450 nA (RTC active), LPM4.5 = 30 nA - enables >10-year battery life in AMI water meters. |
| Communication | eUSCI_B0/B1 supporting I²C (multi-slave addressing) - matches MSP430FR50431IRGCT's I²C bootloader configuration and simplifies host MCU integration. |
| Cryptographic Security | AES256 coprocessor + IP encapsulation + FRAM inherent security - protects firmware and metering data against physical and logical attacks per OIML R49 requirements. |
Pinout & Package
VQFN-64 (RGC) package, 9 mm × 9 mm, 0.5 mm pitch, thermally enhanced with exposed thermal pad. Pin count: 64 terminals, including 44 GPIOs (capacitive-touch capable), dedicated USS analog channels (CH0_IN/CH0_OUT/CH1_IN/CH1_OUT), and ultrasonic crystal interface (USSXTIN/USSXTOUT/USSXT_BOUT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0_IN / CH1_IN | Ultrasonic receive input (differential) | High-impedance analog inputs for echo signals from transducer pairs; routed directly to SDHS ADC via PGA. |
| CH0_OUT / CH1_OUT | Ultrasonic transmit output (differential) | Low-impedance (4 Ω) outputs driven by USS_A PHY; support multi-tone burst generation via PPG. |
| USSXTIN / USSXTOUT | Ultrasonic crystal oscillator interface | Dedicated pins for external 2.5 MHz or 4 MHz crystal; enable precise timing reference for dToF measurement independent of main system clock. |
| USSXT_BOUT | Ultrasonic crystal buffer output | Provides buffered crystal signal to secondary circuitry (e.g., calibration reference or auxiliary timing path). |
| P3.1 / P4.0 | MTIF_OUT_IN / MTIF_PIN_EN | Hardware pulse generation and counting interface for metrology certification pulses; operates in LPM3.5 at 200 nA. |
| PJ.6 / PJ.7 | HFXIN / HFXOUT | High-frequency crystal oscillator inputs for system clock (HFXT); support 4–24 MHz crystals for USB or high-speed communication. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USS_A subsystem | Combines PPG, 4-Ω PHY, PGA, and 8-Msps SDHS ADC - eliminates 12+ external components required in discrete ultrasonic meter designs. |
| Low-Energy Accelerator (LEA) | Offloads 256-point complex FFT from CPU; executes 40× faster than Cortex-M0+ - reduces active-mode time and extends battery life. |
| Ferroelectric RAM (FRAM) | 64 KB unified memory with 125 ns write speed and 10¹⁵ endurance - enables frequent logging of flow events without wear-out concerns. |
| Metering Test Interface (MTIF) | Hardware pulse generator and counter with 16-bit capacity, operable in LPM3.5 at 200 nA - satisfies EN 1434 pulse-output compliance testing. |
| I²C Bootloader (BSL) | Factory-programmed ROM-based BSL on P1.6 (BSLSDA) and P1.7 (BSLSCL) - enables field firmware updates without JTAG hardware. |
Applications
| Ultrasonic Smart Water Meter | Ultrasonic Smart Gas Meter |
|---|---|
Use Scenario: Residential/commercial water consumption monitoring with ISO 4064 Class C accuracy and 10+ year battery life. IC Role / Device Role / Timing Role: Primary metrology SoC performing dToF calculation, flow computation, LCD drive, and pulse output via MTIF. Use Value: Achieves ±1% accuracy over 500:1 dynamic range and detects flows <1 L/h using ±12.5-ps dToF resolution and LEA-accelerated signal processing. |
Use Scenario: Industrial gas flow measurement in custody transfer applications requiring EN 14236 compliance and temperature-compensated dToF. IC Role / Device Role / Timing Role: Integrated ultrasonic sensing controller with PGA gain adjustment, 8-Msps ADC sampling, and 250-ps dToF accuracy. Use Value: Supports >25,000 L/h max flow and ±1% accuracy up to 12,000 L/h with 200:1 range, validated per OIML R49 and EN 14236 standards. |
| Ultrasonic Flow Transmitter | Ultrasonic Heat Meter |
Use Scenario: DIN-rail mounted flow transmitter for industrial process control with 4–20 mA/HART or M-Bus output. IC Role / Device Role / Timing Role: Core signal acquisition and processing unit interfacing with external DAC/ADC and communication ICs via eUSCI. Use Value: Leverages FRAM for robust data logging and AES256 for secure firmware updates over M-Bus, meeting IEC 62056-21 requirements. |
Use Scenario: District heating substation metering with dual-flow temperature differential and EN 1434 Class C heat energy calculation. IC Role / Device Role / Timing Role: Dual-role MCU handling ultrasonic flow measurement and PT1000/NTC temperature acquisition via ADC12_B and Comp_E. Use Value: Integrates 12-channel analog comparator and 12-bit ADC with window comparator for simultaneous flow and ΔT measurement - no external signal conditioners needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrasonic sensing MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5043IRGCT | UART bootloader instead of I²C; identical USS_A, FRAM, LEA, and power specs. | Requires UART host interface; unsuitable where I²C-only communication is mandated by system architecture. | Select MSP430FR5043IRGCT only when UART-based firmware update and host communication are already implemented. |
| MSP430FR60431IPN | LQFP-80 package; adds LCD_C driver (248 segments); higher pin count and larger footprint. | Targeted for display-integrated meters; not pin-compatible and requires PCB redesign. | Choose MSP430FR60431IPN only when integrated LCD driving and 57 GPIOs are required - not a drop-in replacement. |
Compared with MSP430FR50431IRGCT, the UART-bootloader variant offers identical metrology performance but limits communication flexibility, while the LQFP-80 version adds display capability at the cost of board space and layout compatibility - neither is pin-compatible, making MSP430FR50431IRGCT the optimal choice for compact, I²C-centric ultrasonic meter designs.
Availability
MSP430FR50431IRGCT is available at Aetrix Electronics and suitable for ultrasonic smart water meters, smart gas meters, and flow transmitters requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430FR50431IRGCT 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 microcontrollers and metrology solutions.
The MSP430FR504x family is designed specifically for battery-operated ultrasonic flow measurement, integrating USS_A, LEA, FRAM, and metrology peripherals to replace multi-chip discrete solutions in water/gas/heat metering.
FAQ
What is the primary function of the USS_A module in the MSP430FR50431IRGCT?
The USS_A module in the MSP430FR50431IRGCT is a fully integrated ultrasonic sensing analog front end that combines a programmable pulse generator (PPG), 4-Ω output driver (PHY), programmable gain amplifier (PGA), and 12-bit 8-Msps sigma-delta ADC (SDHS). It enables direct excitation and reception of ultrasonic transducers for high-accuracy time-of-flight measurement - the core function required for flow computation in water and gas meters. This integration eliminates external op-amps, drivers, and ADCs traditionally needed in discrete meter designs.
Does the MSP430FR50431IRGCT support both water and gas flow measurement out of the box?
Yes, the MSP430FR50431IRGCT supports both water and gas flow measurement natively. Its USS_A module delivers ±12.5-ps dToF accuracy for water applications and ±250-ps dToF accuracy for gas, with software-configurable PPG burst profiles, PGA gain settings, and ADC sampling parameters. The device meets ISO 4064 (water), OIML R49, EN 14236 (gas), and EN 1434 (heat) accuracy standards - all verified in TI's Ultrasonic Sensing Software Library and EVM430-FR6043 reference design.
What is the role of the Low-Energy Accelerator (LEA) in the MSP430FR50431IRGCT?
The Low-Energy Accelerator (LEA) in the MSP430FR50431IRGCT is a dedicated signal-processing engine that operates independently of the CPU and shares 8 KB of RAM. It accelerates compute-intensive operations such as 256-point complex FFTs up to 40× faster than the CPU alone - reducing active-mode time during ultrasonic signal analysis. This directly lowers average system current, enabling multi-year battery life in portable and sealed metering applications without sacrificing measurement throughput or resolution.
How does the MSP430FR50431IRGCT handle firmware updates in the field?
The MSP430FR50431IRGCT includes a factory-programmed ROM-based I²C bootloader (BSL) accessible on pins P1.6 (BSLSDA) and P1.7 (BSLSCL). This allows secure, in-system firmware updates over I²C without requiring JTAG debug hardware or physical access to the device. The BSL supports encrypted image loading via AES256, aligning with OIML R49 security requirements for utility meters. No external programming hardware is needed - only a standard I²C master interface.
What package and pin count does the MSP430FR50431IRGCT use, and how many GPIOs are available?
The MSP430FR50431IRGCT uses a 64-pin VQFN (RGC) package measuring 9 mm × 9 mm with 0.5 mm pitch. It provides 44 general-purpose I/O pins, all supporting capacitive-touch sensing without external components. Dedicated pins include CH0_IN/CH0_OUT/CH1_IN/CH1_OUT for ultrasonic transducers, USSXTIN/USSXTOUT for ultrasonic crystal, and MTIF_OUT_IN/MTIF_PIN_EN for metrology pulse generation - all mapped in the official TI pin diagram for RGC package (Figure 7-2).
MSP430FR50431IRGCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-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:
- IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 9x12b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR50431IRGCT FAQ
1.How can I place an order for MSP430FR50431IRGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR50431IRGCT 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 MSP430FR50431IRGCT reliable?
The price and inventory of MSP430FR50431IRGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR50431IRGCT is usually 5 days.
3.What payment methods are accepted for MSP430FR50431IRGCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR50431IRGCT transactions.
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4.How is shipping managed for MSP430FR50431IRGCT?
MSP430FR50431IRGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR50431IRGCT 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 MSP430FR50431IRGCT?
For technical support, including MSP430FR50431IRGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR50431IRGCT requirements.
6.How does Aetrix verify that MSP430FR50431IRGCT is sourced from the original manufacturer or authorized distributors?
All MSP430FR50431IRGCT 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 MSP430FR50431IRGCT meets industry standards.
7.What is the process for return or replacement of MSP430FR50431IRGCT?
All MSP430FR50431IRGCT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR50431IRGCT, 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 MSP430FR50431IRGCT part is unused and in its original packaging.
Return procedure for MSP430FR50431IRGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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