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Texas Instruments MSP430F67651AIPEU
- Part No.:
- MSP430F67651AIPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F67651AIPEU.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,689
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Product details
Overview
MSP430F67651AIPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, integrating six 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 128KB flash, 16KB RAM, LCD controller (320 segments), and dual eUSCI modules supporting UART/IrDA/SPI/I²C. It meets ANSI C12.20 and IEC 62053 standards with <0.1% accuracy over 2000:1 dynamic range.
For engineers reviewing the MSP430F67651AIPEU datasheet, MSP430F67651AIPEU pinout, MSP430F67651AIPEU application, or MSP430F67651AIPEU equivalent, key selection criteria include metrology-grade ADC channel count, RTC tamper detection, low-power LPM3.5 mode (0.34 µA), and 128-pin LQFP package compatibility with energy measurement firmware libraries.
Technical Context
This SoC implements a dedicated metrology subsystem with six independent SD24_B converters for simultaneous phase/neutral current and voltage sampling, coupled with digital phase correction and temperature-compensated energy calculation. Its real-time clock includes crystal offset calibration and tamper detection via dedicated pins.
The device supports flexible power supply management with automatic switching between AC mains and backup battery, enabling uninterrupted operation during outages - critical for utility-grade metering. Its ultra-low standby current (2.1 µA in LPM3) and 3 µA LCD operation during AC failure ensure extended battery life in smart meter deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Six 24-bit sigma-delta converters for high-accuracy current/voltage sampling across three phases plus neutral. |
| Accuracy | <0.1% error over 2000:1 dynamic range per phase - enables Class 0.2 meter compliance. |
| CPU Speed | 25 MHz MSP430 core with integrated 32-bit hardware multiplier - executes metrology algorithms without external co-processor. |
| Memory | 128 KB flash (single-cycle) + 16 KB RAM - sufficient for Energy Measurement Library (EMDL) and secure firmware updates. |
| Low-Power Modes | LPM3.5 (RTC active): 0.34 µA at 3 V; LPM4.5 (shutdown): 0.18 µA - extends battery life in backup operation. |
| Communication | Four eUSCI_A (UART/IrDA/SPI) + two eUSCI_B (SPI/I²C) - supports HAN, PLC, and optical port interfaces simultaneously. |
| LCD Driver | Supports up to 320 segments with contrast control - drives full-feature utility display without external controller. |
Pinout & Package
Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 90 usable I/O pins including dedicated metrology analog inputs, pulse output pins, and tamper-detection terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0/SD0N0–SD6P0/SD6N0 | Differential analog inputs for sigma-delta modulators | Six fully differential input pairs for phase A/B/C and neutral current/voltage sensing; SD4–SD6 not implemented in F676x1A variant. |
| VREF | Reference voltage input | External 2.5 V reference for SD24_B converters - enables stable metrology performance independent of supply variation. |
| COM0–COM7 | LCD common outputs | Eight COM lines driving multiplexed LCD segments - supports up to 320-segment displays with software-controlled bias. |
| RST/NMI/SBWTDIO | Reset / NMI / JTAG debug I/O | Single-pin multifunction interface for system reset, non-maskable interrupt, and 4-wire Spy-Bi-Wire debugging. |
| RTCCAP0/RTCCAP1 | RTC crystal load capacitors | Connects to 32.768 kHz crystal; internal capacitor array allows precise frequency calibration for ±5 ppm accuracy. |
| P1.0/P1.1 (VeREF−/VeREF+) | ADC10_A reference terminals | Provides dedicated low-noise reference path for 10-bit SAR ADC - isolates metrology and auxiliary measurements. |
Key Features
| Feature | Design Value |
|---|---|
| 4-quadrant energy measurement | Enables bidirectional power flow monitoring (import/export) per phase - required for net-metering and distributed generation applications. |
| Password-protected RTC with tamper detection | Prevents unauthorized clock manipulation and logs physical intrusion events - satisfies ANSI C12.22 security requirements. |
| Digital phase correction for CTs | Compensates for current transformer phase lag in software - eliminates need for external analog compensation networks. |
| Temperature-compensated energy calculation | Uses on-chip temperature sensor to correct metrology errors induced by thermal drift - maintains accuracy across –40°C to +85°C. |
| Single calibration across 40–70 Hz line frequency | Eliminates need for multiple line-frequency calibrations - reduces factory test time and improves production yield. |
Applications
| Smart Electricity Meter | Revenue-Grade Submetering |
|---|---|
Use Scenario: Installed in residential/commercial 3-phase 4-wire service entrances to measure active/reactive energy consumption and demand. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time sampling, harmonic analysis, tariff calculation, and secure data logging. Use Value: Meets ANSI C12.20 Class 0.2 accuracy with integrated RTC tamper detection and password protection - satisfies utility certification requirements. | Use Scenario: Embedded in HVAC or lighting submeters to monitor branch-circuit energy usage for tenant billing or sustainability reporting. IC Role / Device Role / Timing Role: Standalone energy measurement engine with isolated analog front-end and SPI-connected MCU host. Use Value: Six independent 24-bit ADCs enable simultaneous multi-point sensing without external multiplexers - reduces BOM cost and board area. |
| Grid Edge Monitoring Node | Energy Audit Tool |
Use Scenario: Deployed in distribution transformers or switchgear to capture voltage sags, harmonics, and power quality metrics. IC Role / Device Role / Timing Role: High-precision acquisition unit feeding waveform data to wireless gateway via UART or IrDA. Use Value: 25-MHz CPU executes FFT and PQ analytics onboard - minimizes cloud processing latency and bandwidth usage. | Use Scenario: Portable handheld device used by energy auditors to characterize motor loads, lighting systems, and HVAC efficiency. IC Role / Device Role / Timing Role: Battery-powered metrology core with LCD display and pulse output for field calibration verification. Use Value: LPM3.5 mode draws only 0.34 µA - enables >5-year battery life on coin cell, critical for unattended field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67661AIPEU | 256 KB flash, 16 KB RAM - larger program memory for advanced firmware features. | Same metrology ADC count and accuracy; suitable for future-proofed designs requiring OTA updates. | Select when firmware complexity exceeds 128 KB or long-term feature expansion is planned. |
| MSP430F67651AIPZ | 100-pin LQFP (PZ) package, 62 I/Os - smaller footprint but reduced peripheral pin availability. | Identical metrology specs; trade-off is fewer GPIOs and no SD4–SD6 inputs - limits sensor count. | Select when board space is constrained and full 90-I/O capability is unnecessary. |
Compared with MSP430F67661AIPEU, the MSP430F67651AIPEU offers lower flash capacity but identical metrology performance and pinout; compared with MSP430F67651AIPZ, it provides full I/O access and all six SD24_B channels in the same 128-pin package - essential for complex meter topologies.
Availability
MSP430F67651AIPEU is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade submetering, and grid-edge monitoring requiring stable component supply, long lifecycle support, and TI-qualified metrology performance.
Supply support for MSP430F67651AIPEU 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 and embedded processing solutions, with deep expertise in precision metrology and ultra-low-power design.
The MSP430F67xx1A product line targets energy measurement and power monitoring applications, integrating metrology-grade ADCs, secure RTC, and low-power architecture specifically for ANSI/IEC-compliant smart meters.
FAQ
What metrology standards does the MSP430F67651AIPEU meet?
The MSP430F67651AIPEU meets or exceeds ANSI C12.20 and IEC 62053 standards for active and reactive energy measurement accuracy. Its six 24-bit sigma-delta ADCs deliver <0.1% error over 2000:1 dynamic range, enabling Class 0.2 meter certification. The device also supports 4-quadrant measurement and digital phase correction - both required for modern bidirectional grid applications.
Does the MSP430F67651AIPEU support tamper detection and secure timekeeping?
Yes, the MSP430F67651AIPEU includes a password-protected real-time clock (RTC) with dedicated tamper-detection pins (TAMPER0/TAMPER1), crystal offset calibration, and temperature compensation. These features satisfy ANSI C12.22 security requirements for utility meters. The RTC remains operational in LPM3.5 mode at just 0.34 µA, ensuring accurate time stamping during mains failure.
How many analog inputs does the MSP430F67651AIPEU support for polyphase metering?
The MSP430F67651AIPEU integrates six independent 24-bit sigma-delta ADCs (SD24_B), supporting up to six differential analog input pairs (SD0–SD5). This enables simultaneous sampling of three-phase voltages, three-phase currents, and neutral current - covering full 3-phase 4-wire metering topologies without external multiplexing.
What low-power modes are available on the MSP430F67651AIPEU, and what are their typical currents?
The MSP430F67651AIPEU offers multiple low-power modes: Standby (LPM3) draws 2.1 µA at 3 V with sub-5 µs wake-up; RTC-active mode (LPM3.5) consumes 0.34 µA; and shutdown mode (LPM4.5) uses only 0.18 µA. Its LCD driver operates at 3 µA in LPM3 - enabling continuous display during AC mains failure while preserving battery life.
Is the MSP430F67651AIPEU pin-compatible with other devices in the MSP430F676x1A family?
Yes, the MSP430F67651AIPEU shares identical 128-pin LQFP (PEU) packaging and pinout with all MSP430F676x1A variants (e.g., MSP430F67661AIPEU, MSP430F67671AIPEU). This allows direct PCB reuse across memory/configurations. However, SD4–SD6 analog inputs are not implemented in the F67651A - unused pins (SD4P0/SD4N0, etc.) must be tied appropriately per datasheet guidance.
MSP430F67651AIPEU 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:
- 128KB (128K 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:
MSP430F67651AIPEU FAQ
1.How can I place an order for MSP430F67651AIPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67651AIPEU 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 MSP430F67651AIPEU reliable?
The price and inventory of MSP430F67651AIPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67651AIPEU is usually 5 days.
3.What payment methods are accepted for MSP430F67651AIPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67651AIPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67651AIPEU?
MSP430F67651AIPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67651AIPEU 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 MSP430F67651AIPEU?
For technical support, including MSP430F67651AIPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67651AIPEU requirements.
6.How does Aetrix verify that MSP430F67651AIPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F67651AIPEU 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 MSP430F67651AIPEU meets industry standards.
7.What is the process for return or replacement of MSP430F67651AIPEU?
All MSP430F67651AIPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67651AIPEU, 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 MSP430F67651AIPEU part is unused and in its original packaging.
Return procedure for MSP430F67651AIPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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