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Texas Instruments MSP430F67681IPZR
- Part No.:
- MSP430F67681IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67681IPZR.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,238
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Product details
Overview
MSP430F67681IPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring six 24-bit sigma-delta ADCs, 512KB flash, 16KB RAM, and support for ANSI C12.20/IEC 62053 compliance in utility revenue metering applications.
For engineers reviewing the MSP430F67681IPZR datasheet, MSP430F67681IPZR pinout, MSP430F67681IPZR application, or MSP430F67681IPZR equivalent, key selection criteria include 0.1% energy measurement accuracy over 2000:1 dynamic range, ultra-low-power LPM3.5 mode (0.34 µA), LCD driver for 320-segment displays, and integrated security modules for anti-tamper protection in smart meter deployments.
Technical Context
The MSP430F67681IPZR implements a dedicated energy measurement subsystem with six independent SD24_B sigma-delta modulators-five for phase/neutral current sensing and one for voltage reference-paired with TI's energy measurement software library to compute active/reactive power, energy, and four-quadrant metrics. Its 25-MHz CPU with 32-bit hardware multiplier executes tariff management and communication stack tasks concurrently.
It integrates dual power domains (AVCC/DVCC), auxiliary supplies (AUXVCC1–3) for backup subsystem operation during AC mains failure, and configurable eUSCI peripherals-including four UART, six SPI, and two I²C interfaces-mapped across seven enhanced communication ports to support AMR/AMI module interfacing without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 512 KB single-cycle flash enabling full firmware storage including TI energy measurement library and secure boot code. |
| RAM | 16 KB single-cycle RAM supporting real-time energy calculation buffers and communication protocol stacks. |
| Sigma-Delta ADCs | Six independent 24-bit SD24_B converters with differential inputs and programmable gain for simultaneous phase A/B/C + neutral + voltage + reference sampling. |
| Power Supply Range | 1.8 V to 3.6 V operation allows direct connection to common meter battery/supercap backup rails and simplifies PMIC selection. |
| Low-Power Mode LPM3.5 | 0.34 µA at 3 V enables >1-year RTC + tamper detection operation on coin-cell backup during mains outage. |
| LCD Driver | Supports up to 320 segments with contrast control-sufficient for full-feature utility display panels without external segment drivers. |
| Operating Temperature | –40°C to +85°C industrial grade rating ensures reliability in outdoor meter enclosures across global climates. |
Pinout & Package
100-pin LQFP (PZ) package, 14 mm × 14 mm body size, with 62 general-purpose I/O pins, dedicated SD24_B analog input pairs (SD0P0/SD0N0 through SD6P0/SD6N0), and segregated analog/digital power domains (AVCC/AVSS, DVCC/DVSS, VASYS/VDSYS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XIN / XOUT | Low-frequency crystal oscillator interface | Connects to 32.768-kHz watch crystal for RTC timing; supports automatic calibration and temperature compensation. |
| SD0P0 / SD0N0 – SD5P0 / SD5N0 | Dedicated sigma-delta modulator inputs | Five differential pairs for phase A/B/C and neutral current sensing using CTs, Rogowski coils, or shunts. |
| VREF | Reference voltage input | Accepts external precision reference (e.g., REF5025) to stabilize SD24_B conversion accuracy across temperature and supply variation. |
| AUXVCC3 | Backup subsystem supply | Powers RTC, tamper detection, and backup RAM during AC mains failure; draws only 0.18 µA in LPM4.5 shutdown mode. |
| COM0–COM7 | LCD common outputs | Eight multiplexed common lines enabling 320-segment display drive (40 × 8) with integrated charge pump and contrast control. |
| P1.0 / P1.1 | Analog inputs (VeREF− / VeREF+) | Provide internal reference voltage monitoring and enable self-calibration of SD24_B offset/gain errors. |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% energy accuracy over 2000:1 dynamic range | Enables Class 0.2 meter certification per IEC 62053-22 without external calibration components. |
| Dedicated pulse output pins | Hardware-generated active/reactive energy pulses simplify calibration traceability and eliminate CPU overhead. |
| Password-protected RTC with crystal offset calibration | Ensures ±2 ppm timekeeping accuracy over temperature and aging-critical for time-of-use tariff billing. |
| Integrated anti-tamper modules | Monitors case opening, magnetic fields, and power anomalies to trigger secure event logging and zeroization of sensitive data. |
| Four-quadrant energy measurement per phase | Supports bidirectional grid interconnection (e.g., solar feed-in) with independent import/export kWh accounting. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in residential/commercial 3-phase 4-wire star-connected utility meters for kWh billing and demand response. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time active/reactive energy integration, tariff switching, and secure data logging. Use Value: Meets ANSI C12.20 Class 0.2 accuracy requirements with <0.1% error across 2000:1 current range-reducing need for field recalibration. | Use Scenario: Embedded in industrial submetering gateways tracking energy consumption per production line or HVAC zone. IC Role / Device Role / Timing Role: High-precision energy accumulator with timestamped data export via UART/I²C to host controller. Use Value: Six independent SD24_B ADCs allow concurrent measurement of three phases + neutral + voltage + reference-enabling true vector-based power analysis. |
| AMI Endpoint Node | Tamper-Resistant Grid Sensor |
Use Scenario: Integrated into cellular/NB-IoT-enabled smart meters communicating consumption data hourly to utility head-end systems. IC Role / Device Role / Timing Role: Host processor managing RF modem interface, secure firmware updates, and encrypted data packet generation. Use Value: Four UART/SPI/I²C interfaces enable simultaneous connection to RF module, optical port, and PLC transceiver-eliminating external bus switches. | Use Scenario: Deployed in unattended outdoor substations where physical/magnetic tampering attempts must be detected and logged. IC Role / Device Role / Timing Role: Security-critical subsystem monitoring enclosure integrity, magnetic flux, and supply rail anomalies. Use Value: Hardware-accelerated tamper detection triggers immediate backup RAM encryption and non-volatile event flagging-meeting IEC 62053-31 anti-tamper requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67691IPZR | 32 KB RAM (vs. 16 KB), identical 512 KB flash, same 6 SD24_B ADCs and peripheral set. | Preferred when larger runtime buffer space is required for extended waveform capture or multi-tariff history logging. | Select MSP430F67691IPZR if application requires >16 KB RAM for complex tariff algorithms or extended data buffering. |
| MSP430F67671IPZR | 256 KB flash (vs. 512 KB), 32 KB RAM, same 6 SD24_B ADCs and low-power specs. | Suitable for cost-optimized meters with fixed-feature firmware and no field-upgrade requirement. | Choose MSP430F67671IPZR when firmware footprint is <256 KB and no future feature expansion is planned. |
Compared with MSP430F67691IPZR and MSP430F67671IPZR, the MSP430F67681IPZR delivers optimal balance of memory resources-512 KB flash for secure bootloader, certified libraries, and future OTA updates, plus 16 KB RAM sufficient for real-time metrology and dual-protocol communication stacks.
Availability
MSP430F67681IPZR is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, utility revenue metering, and industrial energy monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for global smart grid deployments.
Supply support for MSP430F67681IPZR 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 solutions for industrial, automotive, and consumer markets.
The MSP430F676x1 product line is engineered specifically for revenue-grade polyphase electricity metering, integrating metrology ADCs, secure processing, and ultra-low-power operation to minimize system cost and bill-of-materials count.
FAQ
What is the maximum dynamic range supported by the MSP430F67681IPZR for accurate energy measurement?
The MSP430F67681IPZR achieves <0.1% accuracy over a 2000:1 dynamic range for phase current measurements, validated per ANSI C12.20 and IEC 62053-22 standards. This performance is enabled by its six 24-bit sigma-delta ADCs with programmable gain and digital phase correction-ensuring precise metrology from light-load standby to full-rated current in 3-phase utility meters.
Does the MSP430F67681IPZR include hardware support for real-time clock (RTC) with battery backup?
Yes, the MSP430F67681IPZR integrates a password-protected RTC with crystal offset calibration and temperature compensation. It operates in LPM3.5 mode at just 0.34 µA (3 V), allowing continuous timekeeping and tamper event logging during AC mains failure using AUXVCC3-supplied backup power-critical for time-of-use billing integrity.
How many independent sigma-delta ADC channels does the MSP430F67681IPZR provide, and what are their primary uses?
The MSP430F67681IPZR provides six independent 24-bit sigma-delta ADCs (SD24_B). Five are configured for differential current sensing on phases A/B/C and neutral; the sixth serves as a precision voltage reference channel. All support variable gain and digital filtering-enabling simultaneous high-accuracy measurement of active/reactive power, harmonics, and four-quadrant energy per phase.
What communication interfaces are available on the MSP430F67681IPZR for smart meter connectivity?
The MSP430F67681IPZR features six enhanced USCI modules configurable as four UART, six SPI, or two I²C interfaces-mapped across seven physical ports. This flexibility supports concurrent connections to RF modems (LTE-M/NB-IoT), PLC transceivers, optical ports, and host MCUs without external bus arbitration, accelerating AMI/AMR system integration.
Is the MSP430F67681IPZR qualified for industrial temperature operation?
Yes, the MSP430F67681IPZR is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters-including SD24_B accuracy, RTC stability, and flash endurance-ensuring reliable performance in outdoor meter enclosures exposed to extreme ambient conditions worldwide.
MSP430F67681IPZR 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, 6x24b Sigma Delta Converter
- Number of I/O:
- 62
- Program Memory Size:
- 512KB (512K 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:
MSP430F67681IPZR FAQ
1.How can I place an order for MSP430F67681IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67681IPZR 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 MSP430F67681IPZR reliable?
The price and inventory of MSP430F67681IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67681IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F67681IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67681IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67681IPZR?
MSP430F67681IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67681IPZR 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 MSP430F67681IPZR?
For technical support, including MSP430F67681IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67681IPZR requirements.
6.How does Aetrix verify that MSP430F67681IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F67681IPZR 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 MSP430F67681IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F67681IPZR?
All MSP430F67681IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67681IPZR, 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 MSP430F67681IPZR part is unused and in its original packaging.
Return procedure for MSP430F67681IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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