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Texas Instruments MSP430F67791AIPEU
- Part No.:
- MSP430F67791AIPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F67791AIPEU.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
MSP430F67791AIPEU from Texas Instruments is a polyphase metering SoC designed for high-accuracy 3-phase electricity meters, featuring seven independent 24-bit sigma-delta ADCs (±0.1% accuracy over 2000:1 dynamic range), 512KB flash/32KB RAM, and integrated LCD controller supporting up to 320 segments - deployed in ANSI C12.20- and IEC 62053-compliant utility metering systems.
For engineers reviewing the MSP430F67791AIPEU datasheet, MSP430F67791AIPEU pinout, MSP430F67791AIPEU application, or MSP430F67791AIPEU equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection with crystal offset calibration, pulse output support for active/reactive energy calibration, and ultra-low-power LPM3.5 mode (0.34 µA at 3 V) for battery-backed operation during AC mains failure.
Technical Context
The MSP430F67791AIPEU integrates a 25-MHz CPU with 32-bit hardware multiplier optimized for real-time energy calculations across three phases plus neutral, using dedicated SD24_B modulators with digital phase correction for current transformers and temperature-compensated energy measurement algorithms.
Its analog subsystem includes dual ADC domains: seven 24-bit sigma-delta converters for precision current/voltage sampling and a 10-bit SAR ADC for auxiliary measurements (supply voltage, die temperature); digital peripherals include four eUSCI_A modules (UART/IrDA/SPI) and two eUSCI_B modules (I²C/SPI), plus three-channel DMA and 16-bit CRC for secure firmware updates and data integrity in smart grid edge devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Seven independent 24-bit sigma-delta ADCs enabling <0.1% energy measurement error over 2000:1 dynamic range per phase. |
| Flash / RAM | 512KB single-cycle flash and 32KB single-cycle RAM - sufficient for full ANSI/IEC metrology library, secure bootloader, and multi-tariff billing logic. |
| Power Modes | LPM3.5 (RTC mode): 0.34 µA at 3 V; LPM4.5 (shutdown): 0.18 µA - supports >10-year battery life in backup power scenarios. |
| LCD Driver | Supports up to 320 segments with programmable contrast control - eliminates external display controller in cost-sensitive meter designs. |
| Communication | Four eUSCI_A (UART/IrDA/SPI) + two eUSCI_B (I²C/SPI) interfaces - enables simultaneous HAN, PLC, and optical port connectivity. |
| RTC Security | Password-protected RTC with tamper detection, crystal offset calibration, and temperature compensation - meets anti-tamper requirements of ANSI C12.22. |
| Package | 128-pin LQFP (PEU), 20 mm × 14 mm body, 90 GPIOs - compatible with industrial PCB assembly and thermal management in sealed meter enclosures. |
Pinout & Package
128-pin LQFP (PEU) package with 20 mm × 14 mm body size and exposed thermal pad. Pin functions include dedicated SDxP/SDxN differential inputs for all seven sigma-delta ADC channels, COM0–COM7 LCD segment drivers, pulse output pins (Sx, COMx), and dual system supply domains (AVCC/AVSS, DVCC/DVSS, VASYS/VDSYS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0 / SD0N0 | Differential input for Sigma-Delta ADC Channel 0 | Accepts shunt or CT-derived voltage signals; supports programmable gain and digital phase correction. |
| SD4P0 / SD4N0 | Differential input for Sigma-Delta ADC Channel 4 | Assigned to neutral current sensing path in 3-phase 4-wire star topology per Figure 1-1. |
| COM0 – COM7 | LCD common outputs | Drive up to 8 multiplexed LCD backplanes; paired with segment pins (e.g., P1.6/COM2) for 320-segment display. |
| S0 – S9 | LCD segment outputs | Configurable as segment drivers or general-purpose I/O; mapped to ports P7–P11 for flexible display layout. |
| RST/NMI/SBWTDIO | Reset, NMI, and JTAG debug I/O | Enables in-system programming, boundary-scan testing, and secure firmware recovery via Spy-Bi-Wire interface. |
| VREF | Reference voltage input | Accepts external 2.5V reference for highest ADC accuracy; internal reference also available. |
Key Features
| Feature | Design Value |
|---|---|
| 4-quadrant energy measurement | Enables bidirectional power flow monitoring (generation/consumption) per phase without external hardware reconfiguration. |
| Dedicated pulse outputs | Hardware-calibrated active/reactive energy pulses (kWh/kVARh) eliminate software timing jitter in revenue-grade metering. |
| Temperature-compensated metrology | On-die temperature sensor feeds real-time correction coefficients into energy calculation engine - maintains accuracy across –40°C to +85°C. |
| Flexible power supply architecture | Automatic switching between AC mains, supercapacitor, and coin-cell backup ensures continuous RTC and memory retention during outages. |
| Anti-tamper security modules | Hardware-accelerated AES-128, tamper-detect pins, and secure boot prevent unauthorized firmware modification and physical attack. |
Applications
| 3-Phase Electronic Watt-Hour Meter | Smart Grid Distribution Transformer Monitor |
|---|---|
Use Scenario: Revenue-grade metering in residential/commercial 3-phase 4-wire installations with CT-based current sensing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time voltage/current sampling, harmonic analysis, and kWh/kVARh accumulation. Use Value: Meets ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements without external calibration components. |
Use Scenario: Real-time load profiling and power quality monitoring on medium-voltage distribution transformers. IC Role / Device Role / Timing Role: High-resolution waveform capture and RMS/THD calculation engine synchronized to 50/60 Hz line frequency. Use Value: 40–70 Hz single-calibration range eliminates need for region-specific firmware variants in global deployments. |
| AMI Endpoint with Dual-Port Communication | Prepayment Energy Meter with Tamper-Resistant RTC |
Use Scenario: Advanced metering infrastructure node communicating via PLC (eUSCI_B) and RF module (eUSCI_A) simultaneously. IC Role / Device Role / Timing Role: Central processing unit managing concurrent protocol stacks (DLMS/COSEM, IEEE 1901.2) and secure OTA updates. Use Value: Six eUSCI modules enable full-duplex HAN + WAN communication without external bridge ICs or bus contention. |
Use Scenario: Pay-as-you-go meter requiring secure timekeeping, battery-backed RTC, and physical tamper response. IC Role / Device Role / Timing Role: Secure real-time clock with crystal offset calibration, temperature compensation, and password-protected access. Use Value: Tamper-detect pins trigger immediate memory wipe and log events; RTC continues operation at 0.34 µA in LPM3.5 mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67781AIPEU | Same 512KB flash but only 16KB RAM; identical ADC count, timers, and eUSCI configuration. | Reduced firmware footprint requirement; suitable for simpler tariff structures or legacy codebases. | Select when full 32KB RAM is unnecessary and BOM cost reduction is prioritized over future feature scalability. |
| MSP430F67691AIPEU | 6-channel SD24_B (vs. 7), same 512KB/32KB; lacks SD6P0/SD6N0 pins - no neutral current sensing capability. | Restricted to 3-phase 3-wire delta configurations; cannot support 4-wire star with neutral monitoring. | Choose only for delta-connected systems where neutral current measurement is not required by regulatory standard. |
Compared with MSP430F67781AIPEU and MSP430F67691AIPEU, the MSP430F67791AIPEU uniquely delivers full 7-channel sigma-delta metrology with neutral current support, maximum RAM headroom for DLMS/COSEM stack execution, and complete pin compatibility within the PEU package family - making it the highest-capability variant for next-generation ANSI/IEC-compliant meters.
Availability
MSP430F67791AIPEU is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, smart grid distribution monitors, and prepayment energy meters requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade certification.
Supply support for MSP430F67791AIPEU 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 for industrial, automotive, and energy applications.
The MSP430F67791AIPEU belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, low-power energy measurement in smart meters and grid-edge sensing equipment.
FAQ
What metrology standards does the MSP430F67791AIPEU meet?
The MSP430F67791AIPEU meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements for active and reactive energy measurement. Its seven 24-bit sigma-delta ADCs deliver <0.1% error over 2000:1 dynamic range, and built-in digital phase correction compensates for CT-induced phase shift - all verified per TI's SLAS983A production datasheet.
Does the MSP430F67791AIPEU support neutral current measurement?
Yes, the MSP430F67791AIPEU supports neutral current measurement via its seventh sigma-delta ADC channel (SD6P0/SD6N0 pins), enabling full 3-phase 4-wire star topology compliance. This capability is confirmed in the device comparison table (Table 3-1) and functional block diagram - distinguishing it from the 6-channel MSP430F67691AIPEU and MSP430F67491AIPEU variants.
What is the lowest power consumption mode of the MSP430F67791AIPEU?
The MSP430F67791AIPEU achieves 0.18 µA in LPM4.5 (shutdown mode) and 0.34 µA in LPM3.5 (RTC-only mode) at 3 V, per Section 5.5 of SLAS983A. These modes retain RTC operation and SRAM contents while disabling CPU, peripherals, and LCD - critical for >10-year battery life in AC-failure backup scenarios.
How many communication interfaces does the MSP430F67791AIPEU integrate?
The MSP430F67791AIPEU integrates six enhanced universal serial communication interfaces: four eUSCI_A modules (supporting UART, IrDA, SPI) and two eUSCI_B modules (supporting I²C and SPI). This allows concurrent implementation of optical port (UART), PLC modem (SPI/I²C), and HAN radio (UART/IrDA) without external bridging logic.
Is the MSP430F67791AIPEU pin-compatible with other devices in the F677x1A family?
Yes, the MSP430F67791AIPEU shares identical 128-pin LQFP (PEU) package pinout with all F677x1A, F676x1A, and F674x1A variants in the same package option, including MSP430F67781AIPEU and MSP430F67771AIPEU. Pin mapping differences are limited to secondary functions (e.g., SD6P0/SD6N0 are NC on lower-tier variants), enabling hardware reuse across product tiers.
MSP430F67791AIPEU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 128-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT, 7x24b Sigma Delta Converter
- Number of I/O:
- 90
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F67791AIPEU FAQ
1.How can I place an order for MSP430F67791AIPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67791AIPEU 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 MSP430F67791AIPEU reliable?
The price and inventory of MSP430F67791AIPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67791AIPEU is usually 5 days.
3.What payment methods are accepted for MSP430F67791AIPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67791AIPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67791AIPEU?
MSP430F67791AIPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67791AIPEU 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 MSP430F67791AIPEU?
For technical support, including MSP430F67791AIPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67791AIPEU requirements.
6.How does Aetrix verify that MSP430F67791AIPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F67791AIPEU 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 MSP430F67791AIPEU meets industry standards.
7.What is the process for return or replacement of MSP430F67791AIPEU?
All MSP430F67791AIPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67791AIPEU, 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 MSP430F67791AIPEU part is unused and in its original packaging.
Return procedure for MSP430F67791AIPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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