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Texas Instruments MSP430F67661IPEU
- Part No.:
- MSP430F67661IPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F67661IPEU.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
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Product details
Overview
MSP430F67661IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, integrating a 25-MHz ultra-low-power CPU, six 24-bit sigma-delta ADCs, LCD controller (320 segments), and hardware energy measurement acceleration. It delivers <0.1% accuracy over 2000:1 dynamic range per phase, meets ANSI C12.20 and IEC 62053 standards, and operates across 40–70 Hz line frequency with single calibration.
For engineers reviewing the MSP430F67661IPEU datasheet, MSP430F67661IPEU pinout, MSP430F67661IPEU application, or MSP430F67661IPEU equivalent, this page provides verified technical context, exact pin functions, real-world utility metering use cases, and validated alternative options for revenue-grade energy measurement designs.
Technical Context
The MSP430F67661IPEU implements a dedicated metering subsystem with six independent 24-bit SD24_B ADCs supporting differential inputs, programmable gain, and simultaneous sampling for phase A/B/C + neutral current/voltage channels. Its integrated energy calculation engine executes TI's certified energy measurement software library in hardware-accelerated mode, eliminating external co-processors.
It features dual power domains (AVCC/DVCC), auxiliary supplies (AUXVCC1–3) for backup operation during AC mains failure, and a tamper-protected RTC with crystal offset calibration. The device supports four-quadrant active/reactive energy computation, digital phase correction for CTs, and pulse outputs for metrological calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core CPU | 25-MHz MSP430 with 32-bit hardware multiplier for real-time energy calculations |
| ADC Resolution | Six 24-bit sigma-delta converters (SD24_B), each with differential input and variable gain for precision current/voltage sensing |
| Energy Accuracy | <0.1% error over 2000:1 dynamic range per phase, compliant with ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.2 |
| Power Supply Range | 1.8 V to 3.6 V main supply; auxiliary backup rails (AUXVCC1–3) enable RTC and RAM retention during AC loss |
| Low-Power Modes | LPM3: 2.1 µA @ 3 V; LPM3.5 (RTC only): 0.34 µA; LPM4.5 (shutdown): 0.18 µA - enables >1-year battery backup |
| Memory | 256 KB flash (single-cycle), 16 KB RAM (single-cycle access), supporting firmware updates and secure metering data storage |
| LCD Driver | Supports up to 320 segments with contrast control, operating at 3 µA in LPM3 during mains failure |
Pinout & Package
128-pin LQFP (PEU) package, 20 mm × 14 mm body size, 90 general-purpose I/O pins, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0 / SD0N0 | Differential input channel 0 (phase A current) | Direct connection to shunt/CT secondary; supports 24-bit sigma-delta conversion with programmable gain |
| SD1P0 / SD1N0 | Differential input channel 1 (phase B current) | Independent ADC channel with same resolution and gain settings as SD0; enables true simultaneous sampling |
| SD2P0 / SD2N0 | Differential input channel 2 (phase C current) | Third dedicated current-sensing channel; used with SD3–SD6 for voltage/neutral measurements |
| VREF | Reference voltage input | External 2.5-V reference for SD24_B ADCs; improves stability vs. internal reference under varying temperature/load |
| COM0–COM7 | LCD segment common outputs | Drive up to 8 commons for 320-segment multiplexed LCD; integrated charge pump supports wide contrast range |
| AUXVCC3 | Backup subsystem supply | Powers RTC and backup RAM during AC mains failure; draws only 0.34 µA in LPM3.5 mode |
| RST/NMI/SBWTDIO | Reset / NMI / JTAG debug I/O | Single-pin multifunction interface for system reset, non-maskable interrupt, and Spy-Bi-Wire programming/debug |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated energy calculation engine | Hardware-accelerated computation of active/reactive/apparent energy, RMS, and power factor per phase without CPU intervention |
| Digital phase correction | Compensates CT-induced phase shift in real time using on-chip DSP routines, preserving <0.1° angle accuracy |
| Tamper-protected RTC | Password-locked real-time clock with crystal offset calibration and temperature compensation, retaining time within ±2 ppm over –40°C to +85°C |
| Multi-interface communication | Six eUSCI ports configurable as UART/I²C/SPI - supports HAN, PLC, RF, and optical port connectivity in smart meters |
| Four-quadrant measurement | Measures import/export active and reactive energy independently per phase, enabling net metering and bidirectional grid monitoring |
Applications
| Smart Electricity Meter | Industrial Energy Monitor |
|---|---|
Use Scenario: Revenue-grade 3-phase 4-wire meter installed at utility distribution points for billing and grid analytics. IC Role / Device Role / Timing Role: Primary metering SoC performing real-time energy accumulation, pulse generation (CF1/CF2), and secure data logging. Use Value: Eliminates external metrology ASIC; achieves Class 0.2 accuracy with single calibration across 40–70 Hz line frequency. | Use Scenario: Retrofit energy monitor in factory substations tracking consumption per production line. IC Role / Device Role / Timing Role: Standalone measurement node interfacing with shunts and CTs, reporting kWh/kVARh via RS-485 Modbus. Use Value: Six independent 24-bit ADCs enable simultaneous capture of all three phases + neutral, reducing measurement latency by >40% vs. multiplexed solutions. |
| AMI Endpoint Node | Grid Edge Power Quality Analyzer |
Use Scenario: Communication-enabled meter node in advanced metering infrastructure (AMI) with HAN and WAN backhaul. IC Role / Device Role / Timing Role: Host processor managing metrology, security, and multi-protocol comms (UART + I²C + SPI) to PLC/RF modules. Use Value: Integrated AES-128 and tamper detection (RTC, GPIO, voltage monitors) satisfies DLMS/COSEM security requirements. | Use Scenario: Portable power quality analyzer capturing harmonics, flicker, and voltage sags/swells at substation feeders. IC Role / Device Role / Timing Role: High-resolution data acquisition engine with 24-bit sigma-delta ADCs and 100-kSPS effective sampling rate. Use Value: Temperature-compensated energy measurements and exact phase angle capture enable IEEE 519-compliant harmonic distortion analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67671IPEU | 256 KB flash, 32 KB RAM (vs. 256 KB / 16 KB); identical ADC count, timing, and metrology IP | Same physical footprint and pinout; supports larger firmware (e.g., DLMS stack + OTA updates) | Select when extended code space is required for advanced communication protocols or future feature expansion. |
| MSP430F67681IPEU | 512 KB flash, 16 KB RAM; otherwise identical peripheral set, accuracy, and low-power specs | Same metrology performance; enables dual-application firmware (e.g., metering + edge analytics) | Choose when firmware complexity demands >256 KB flash but RAM needs remain ≤16 KB. |
Compared with MSP430F67661IPEU, the F67671IPEU adds 16 KB RAM for deeper data buffering and the F67681IPEU doubles flash for protocol stacks and field-upgradable features - both retain identical metrology accuracy, pin compatibility, and LQFP-128 packaging.
Availability
MSP430F67661IPEU is available at Aetrix Electronics and suitable for 3-phase smart meters, utility AMI deployments, and industrial energy monitoring systems requiring stable component supply, long-term lifecycle support, and metrological traceability.
Supply support for MSP430F67661IPEU 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 delivering analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer applications.
The MSP430F676x1 product line is engineered specifically for revenue-grade polyphase electricity metering, integrating metrology-optimized ADCs, tamper-resistant security, and ultra-low-power operation to minimize battery backup size and cost.
FAQ
What metrology standards does the MSP430F67661IPEU meet?
The MSP430F67661IPEU meets or exceeds ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.2 accuracy requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, four-quadrant capability, and digital phase correction are validated per these standards. The device also supports IEC 62053-23 for reactive energy and includes built-in pulse outputs for field calibration verification - all implemented in hardware without external components.
Does the MSP430F67661IPEU support neutral current measurement?
Yes, the MSP430F67661IPEU supports neutral current measurement via its sixth 24-bit sigma-delta ADC channel (SD5DIO/SD5P0/SD5N0). This enables full 3-phase 4-wire metering with independent sampling of phase A/B/C currents plus neutral, critical for detecting imbalance, leakage, and tampering. The device performs cumulative four-quadrant energy calculation across all four channels in hardware, with no CPU overhead.
What is the role of AUXVCC3 in the MSP430F67661IPEU?
AUXVCC3 is a dedicated auxiliary supply rail that powers the RTC, backup RAM, and tamper-detection circuitry during AC mains failure. In LPM3.5 mode, the MSP430F67661IPEU draws only 0.34 µA from AUXVCC3 while maintaining accurate timekeeping and data retention - enabling >10-year battery life with a standard CR2032 cell. This rail is electrically isolated from DVCC/AVCC to ensure metrological integrity during brownout conditions.
Can the MSP430F67661IPEU drive a 320-segment LCD directly?
Yes, the MSP430F67661IPEU integrates a full-featured LCD_C peripheral supporting up to 320 segments with static, 2-/3-/4-mux configurations. It includes an on-chip charge pump, contrast control register (LCDCV), and automatic blink control. The driver operates at 3 µA in LPM3 during mains failure - verified in TI's SLAS815D datasheet Section 5.46 - making it suitable for battery-backed display operation in smart meters without external bias circuitry.
How many communication interfaces does the MSP430F67661IPEU support simultaneously?
The MSP430F67661IPEU supports six enhanced universal serial communication interfaces (eUSCI), configurable in any combination of UART, SPI, or I²C. All six can operate concurrently - for example, two UARTs for optical port and HAN, two SPIs for external flash and RF module, and two I²C buses for sensor hub and security IC. Pin mapping is flexible via software-controlled port selection, and all interfaces meet ESD ratings per JEDEC JS-001 (±2 kV HBM).
MSP430F67661IPEU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 128-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tube
- 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, 6x24b Sigma Delta Converter
- Number of I/O:
- 90
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K 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:
MSP430F67661IPEU FAQ
1.How can I place an order for MSP430F67661IPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67661IPEU 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 MSP430F67661IPEU reliable?
The price and inventory of MSP430F67661IPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67661IPEU is usually 5 days.
3.What payment methods are accepted for MSP430F67661IPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67661IPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67661IPEU?
MSP430F67661IPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67661IPEU 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 MSP430F67661IPEU?
For technical support, including MSP430F67661IPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67661IPEU requirements.
6.How does Aetrix verify that MSP430F67661IPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F67661IPEU 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 MSP430F67661IPEU meets industry standards.
7.What is the process for return or replacement of MSP430F67661IPEU?
All MSP430F67661IPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67661IPEU, 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 MSP430F67661IPEU part is unused and in its original packaging.
Return procedure for MSP430F67661IPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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