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Texas Instruments MSP430F67791AIPZ
- Part No.:
- MSP430F67791AIPZ
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67791AIPZ.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,786
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Product details
Overview
MSP430F67791AIPZ from Texas Instruments is a polyphase metering SoC designed for high-accuracy 3-phase energy measurement in utility-grade electricity meters. It integrates seven independent 24-bit sigma-delta ADCs (±0.1% accuracy over 2000:1 dynamic range), a 25-MHz CPU with 32-bit multiplier, 512KB flash/32KB RAM, LCD controller (320 segments), and dual eUSCI modules supporting UART/I²C/SPI. It meets ANSI C12.20 and IEC 62053 standards and supports CT, Rogowski, or shunt-based current sensing.
For engineers reviewing the MSP430F67791AIPZ datasheet, MSP430F67791AIPZ pinout, MSP430F67791AIPZ application, or MSP430F67791AIPZ equivalent, key selection criteria include metrology-grade ADC performance, RTC tamper detection with crystal offset calibration, ultra-low-power LPM3.5 mode (0.34 µA), and support for three-phase + neutral power calculation with 4-quadrant energy measurement.
Technical Context
The MSP430F67791AIPZ implements a dedicated metrology subsystem with seven SD24_B modulators feeding independent digital filters, enabling simultaneous voltage/current sampling across three phases and neutral. Its real-time clock includes hardware tamper detection, temperature-compensated crystal calibration, and password protection - all operating in LPM3.5 without CPU intervention.
Digital peripherals include four eUSCI_A modules (UART/IrDA/SPI) and two eUSCI_B modules (I²C/SPI), three-channel DMA for zero-CPU ADC data transfer, and a 16-bit CRC engine for firmware integrity. Power management supports automatic supply switching between AC-derived and backup battery rails, with LCD operation at 3 µA during mains failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Seven independent 24-bit sigma-delta ADCs - enables simultaneous high-precision phase current/voltage sampling with <0.1% error over 2000:1 dynamic range. |
| CPU Speed | 25 MHz MSP430 CPU with integrated 32-bit hardware multiplier - executes full metrology calculations (active/reactive power, RMS, harmonics) in real time. |
| Memory | 512 KB flash / 32 KB RAM - sufficient for certified energy measurement firmware, secure bootloader, and field-upgradable calibration tables. |
| Low-Power Mode | LPM3.5 (RTC active): 0.34 µA @ 3 V - retains RTC, tamper flags, and SRAM while enabling >1-year battery backup for meter data retention. |
| LCD Support | 320-segment LCD controller with contrast control - drives large-format utility meter displays without external bias circuitry. |
| Communication | Four eUSCI_A (UART/IrDA/SPI) + two eUSCI_B (I²C/SPI) - supports HAN, PLC, optical port, and metrology IC interface simultaneously. |
| Package | 100-pin LQFP (PZ), 14 mm × 14 mm - provides 62 GPIOs including dedicated pulse output pins for active/reactive energy calibration. |
Pinout & Package
Package: 100-pin LQFP (PZ), body size 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad not present. Pinout validated per TI SLAS983A Rev. September 2018, Figure 4-2 and Table 4-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XIN / XOUT | 32.768 kHz crystal oscillator input/output | Drives temperature-compensated RTC with crystal offset calibration; requires external 12.5 pF load capacitors. |
| VREF | Reference voltage input | Accepts external 2.5 V reference for SD24_B ADCs; enables stable metrology accuracy independent of AVCC variation. |
| SD0P0–SD6N0 | Sigma-delta ADC analog inputs (7 channels) | Differential inputs for phase A/B/C and neutral current/voltage sensing; supports programmable gain and digital phase correction. |
| COM0–COM7 | LCD segment/common drivers | Direct drive for up to 320-segment LCD; COM0–COM7 are common outputs; segment pins mapped across P1–P11 ports. |
| eUSCI_A0–A3, B0–B1 | Universal serial communication interfaces | Configurable as UART (optical port), SPI (PLC modem), or I²C (sensor hub); each has independent clock and DMA trigger capability. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Quadrant energy measurement | Per-phase and cumulative active/reactive energy calculation with direction detection - required for bidirectional grid-tie metering compliance. |
| Password-protected RTC with tamper detection | Hardware-level RTC security: detects case opening, voltage glitch, temperature anomaly, and logs events to nonvolatile memory without CPU wake-up. |
| Dedicated pulse outputs (CF1/CF2) | Two hardware-calibrated pulse trains for active/reactive energy - eliminates software timing jitter and enables direct connection to LED or optocoupler calibration interfaces. |
| Digital phase correction for CTs | Real-time compensation of current transformer phase lag using configurable digital filter coefficients - improves power factor accuracy at low loads. |
| Temperature-compensated energy measurement | On-chip temperature sensor feeds ADC calibration algorithm - maintains <0.1% accuracy across –40°C to +85°C ambient without external compensation circuitry. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
|
Use Scenario: Installed in residential/commercial 3-phase 4-wire utility meters for kWh billing and demand response. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time active/reactive energy accumulation, harmonic analysis, and tariff switching. Use Value: Meets ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S requirements with single-point calibration across 40–70 Hz line frequency. |
Use Scenario: Embedded in industrial submetering panels for tenant-level energy allocation and power quality logging. IC Role / Device Role / Timing Role: High-accuracy energy aggregator with timestamped 15-min interval registers and event-triggered waveform capture. Use Value: Seven independent SD24_B ADCs enable simultaneous sampling of all three phases and neutral - eliminating inter-channel crosstalk in unbalanced load analysis. |
| Grid Edge IoT Node | Tamper-Resistant Meter Module |
|
Use Scenario: Edge node in smart grid AMI systems collecting voltage sag/swell, flicker, and harmonic distortion metrics. IC Role / Device Role / Timing Role: Real-time signal processor interfacing with RF/PLC modems via eUSCI_A/B; RTC timestamps all events with ±2 ppm stability. Use Value: Integrated 10-bit SAR ADC measures internal supply/temperature for system health monitoring - no external sensors needed. |
Use Scenario: Secure meter design requiring anti-tampering certification (e.g., DLMS/COSEM, STS, or IEC 62056-53). IC Role / Device Role / Timing Role: Security-enabling SoC with password-protected RTC, tamper-detect pins, and encrypted flash write protection. Use Value: Tamper detection logic operates autonomously in LPM3.5 - preserves evidence (timestamp, event type, register state) even during complete power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67791AIPEU | 128-pin LQFP package with 90 GPIOs; identical core specs but larger footprint and higher I/O count. | Preferred where additional GPIOs are needed for extended sensor interfaces, auxiliary displays, or multi-modem support. | Select MSP430F67791AIPEU when board layout allows larger package and ≥90 I/Os are required for system expansion. |
| MSP430F67691AIPZ | Same 100-pin PZ package but only six SD24_B ADCs; 512KB flash/32KB RAM unchanged. | Suitable for 2-phase or simplified 3-phase meters where neutral current measurement is omitted. | Choose MSP430F67691AIPZ to reduce BOM cost when full 7-channel metrology is unnecessary and neutral current sensing is excluded. |
Compared with MSP430F67791AIPZ, the MSP430F67791AIPEU offers greater I/O flexibility for complex meter designs, while the MSP430F67691AIPZ trades one SD24_B channel for lower unit cost in applications omitting neutral current measurement - both retain identical security, RTC, and communication capabilities.
Availability
MSP430F67791AIPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and grid-edge IoT node development requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.
Supply support for MSP430F67791AIPZ 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 experience in metrology and industrial-grade microcontrollers.
The MSP430F67791AIPZ belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for ANSI/IEC-compliant energy measurement in utility, commercial, and industrial metering applications - emphasizing accuracy, security, and ultra-low-power operation.
FAQ
What metrology standards does the MSP430F67791AIPZ meet?
The MSP430F67791AIPZ meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-21/22 Class 0.5S accuracy requirements for active and reactive energy measurement. Its seven 24-bit sigma-delta ADCs, digital phase correction, and temperature compensation ensure compliance across –40°C to +85°C and 40–70 Hz line frequencies with single-point calibration - verified in TI's Energy Measurement Design Center (EMDC) reference firmware.
Does the MSP430F67791AIPZ support tamper detection without waking the CPU?
Yes. The MSP430F67791AIPZ features hardware-based tamper detection that operates independently in LPM3.5 mode. It monitors RTCCLK, VCC, temperature, and dedicated tamper pins, logging events with timestamps to protected memory - all without CPU intervention. This ensures forensic evidence retention during mains failure or physical intrusion, critical for DLMS/COSEM and STS-certified meter deployments.
How many independent ADC channels does the MSP430F67791AIPZ provide?
The MSP430F67791AIPZ integrates seven independent 24-bit sigma-delta ADC channels (SD24_B) - sufficient for simultaneous sampling of three phase voltages, three phase currents, and neutral current. Each channel supports differential inputs, programmable gain, and digital filtering. An additional 10-bit SAR ADC provides six external and two internal (supply/temperature) measurement channels.
What LCD segment count does the MSP430F67791AIPZ support?
The MSP430F67791AIPZ supports up to 320 LCD segments via its integrated LCD_C peripheral. It provides eight common outputs (COM0–COM7) and flexible segment mapping across multiple I/O ports. Contrast is adjustable in software, and the driver operates down to 3 µA in LPM3 during AC mains failure - enabling long-duration display retention on backup power.
Can the MSP430F67791AIPZ perform 4-quadrant energy measurement?
Yes. The MSP430F67791AIPZ natively supports 4-quadrant active and reactive energy measurement per phase and cumulatively. Its metrology engine calculates energy direction (import/export, inductive/capacitive) using signed instantaneous power values derived from synchronized voltage/current samples - essential for bidirectional grid-tie and net-metering applications compliant with IEC 62053-23.
MSP430F67791AIPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tape & Reel (TR)
- 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:
- 62
- 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:
MSP430F67791AIPZ FAQ
1.How can I place an order for MSP430F67791AIPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67791AIPZ 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 MSP430F67791AIPZ reliable?
The price and inventory of MSP430F67791AIPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67791AIPZ is usually 5 days.
3.What payment methods are accepted for MSP430F67791AIPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67791AIPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67791AIPZ?
MSP430F67791AIPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67791AIPZ 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 MSP430F67791AIPZ?
For technical support, including MSP430F67791AIPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67791AIPZ requirements.
6.How does Aetrix verify that MSP430F67791AIPZ is sourced from the original manufacturer or authorized distributors?
All MSP430F67791AIPZ 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 MSP430F67791AIPZ meets industry standards.
7.What is the process for return or replacement of MSP430F67791AIPZ?
All MSP430F67791AIPZ units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67791AIPZ, 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 MSP430F67791AIPZ part is unused and in its original packaging.
Return procedure for MSP430F67791AIPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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