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Texas Instruments MSP430F67661IPZR
- Part No.:
- MSP430F67661IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67661IPZR.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,286
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Product details
Overview
MSP430F67661IPZR from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, integrating a 25-MHz ultra-low-power MCU, six 24-bit sigma-delta ADCs, LCD controller (320 segments), and hardware energy measurement engine. It delivers <0.1% accuracy over 2000:1 dynamic range for phase current, meets ANSI C12.20 and IEC 62053 standards, and operates across 40–70 Hz line frequency with single calibration.
For engineers reviewing the MSP430F67661IPZR datasheet, MSP430F67661IPZR pinout, MSP430F67661IPZR application, or MSP430F67661IPZR equivalent, this page provides verified technical context, validated pin functions, real-world utility metering use cases, and confirmed alternative options for revenue-grade energy measurement designs.
Technical Context
The MSP430F67661IPZR implements a dedicated hardware-based energy measurement pipeline using six independent SD24_B sigma-delta modulators with differential inputs and programmable gain, each feeding into a digital filter and calculation engine compliant with ANSI/IEC metrology standards. Its 32-bit hardware multiplier accelerates real-time active/reactive power and energy accumulation without CPU intervention.
It integrates dual power domains (AVCC/DVCC), auxiliary supply monitoring (AUXVCC1–AUXVCC3), tamper-detection circuitry, and a password-protected RTC with crystal offset calibration - all operating in ultra-low-power modes including LPM3.5 (0.34 µA) and LPM4.5 (0.18 µA) for backup operation during mains failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 256 KB single-cycle flash enabling full firmware + TI energy measurement library storage without external memory. |
| RAM | 16 KB single-cycle RAM supporting real-time data buffering, tariff management, and communication stack execution. |
| Sigma-Delta ADCs | 6 × 24-bit SD24_B converters with differential inputs and variable gain - sufficient for 3-phase + neutral current/voltage sensing. |
| Line Frequency Range | 40 Hz to 70 Hz with single-point calibration - eliminates per-frequency recalibration in global utility deployments. |
| Power Supply Range | 1.8 V to 3.6 V - supports direct connection to regulated meter power rails and battery-backed operation. |
| Low-Power Mode (LPM3.5) | 0.34 µA at 3 V - enables >1-year RTC + tamper monitoring on coin-cell backup during AC failure. |
| LCD Driver | Supports up to 320 segments with contrast control - drives standard 4×32 character or custom utility display modules. |
| Operating Temperature | –40°C to +85°C industrial grade - qualified for outdoor meter enclosures and uncontrolled environments. |
Pinout & Package
Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, 0.5 mm pitch, 62 I/O pins. Thermal pad not present; standard surface-mount assembly compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XIN / XOUT | Low-frequency crystal oscillator input/output | Drives 32.768 kHz RTC crystal; internal load caps eliminate external components for timekeeping accuracy. |
| AUXVCC1–AUXVCC3 | Auxiliary supply inputs | Enable independent power domains for backup subsystems (RTC, tamper, LCD), allowing seamless switchover during main supply loss. |
| SD0P0–SD6N0 | Sigma-delta analog input pairs | 6 differential channel pairs (12 pins) for direct connection to CTs, Rogowski coils, or shunts - no external signal conditioning required. |
| COM0–COM7 | LCD common outputs | Drive up to 8 LCD commons for multiplexed 320-segment displays; integrated charge pump supports wide contrast range. |
| P1.0–P1.7, P2.0–P2.7, etc. | General-purpose I/O with secondary functions | Configurable as UART/SPI/I²C, timer capture/compare, or energy pulse outputs - supports AMR/AMI module interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated energy measurement engine | Hardware-accelerated active/reactive energy calculation per phase with four-quadrant support - eliminates CPU overhead and ensures deterministic metrology timing. |
| Digital phase correction | Compensates CT-induced phase shift in real time using on-chip DSP resources - maintains <0.1% accuracy without external calibration hardware. |
| Password-protected RTC | Secure real-time clock with crystal offset calibration and temperature compensation - prevents unauthorized time manipulation in revenue-critical applications. |
| Integrated anti-tamper modules | Detects case opening, magnetic interference, and voltage anomalies via dedicated inputs and internal monitoring - triggers secure event logging and alert signaling. |
| Flexible communication interfaces | 6 eUSCI ports configurable as UART, SPI, or I²C - supports simultaneous PLC, RF, and optical port connectivity for smart meter backhaul and HAN. |
| Ultra-low-power LCD operation | 3 µA LCD operation in LPM3 - extends battery life during extended mains outage while retaining full display functionality. |
Applications
| 3-Phase Revenue Meter | Smart Grid AMI Node |
|---|---|
|
Use Scenario: Installed in utility-owned 3-phase 4-wire star-connected electricity meters for commercial/industrial billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time energy accumulation, tariff switching, secure time-stamping, and pulse output generation. Use Value: Meets ANSI C12.20 Class 0.2 accuracy requirements with single calibration across 40–70 Hz, reducing field commissioning time and test cost. |
Use Scenario: Embedded in advanced metering infrastructure endpoints communicating via PLC or RF mesh networks. IC Role / Device Role / Timing Role: System-on-chip handling metering, secure data aggregation, encrypted communication, and remote firmware updates. Use Value: Integrated eUSCI peripherals and low-power modes enable reliable 10+ year battery-backed operation during network outages. |
| Energy Monitoring Gateway | Tamper-Resistant Submeter |
|
Use Scenario: Deployed in building-level energy dashboards tracking HVAC, lighting, and tenant loads across multiple circuits. IC Role / Device Role / Timing Role: High-precision data acquisition unit with harmonic analysis capability and local data logging via SPI flash interface. Use Value: Six independent 24-bit sigma-delta ADCs allow concurrent sampling of voltage/current on three phases plus neutral - enabling true vector power analysis. |
Use Scenario: Used in tenant submeters where physical and electrical tampering attempts must be detected and logged. IC Role / Device Role / Timing Role: Security-enforced metrology controller with tamper detect inputs, secure RTC, and non-volatile event logging. Use Value: Integrated tamper detection (case open, magnetic, voltage glitch) and password-protected registers prevent unauthorized configuration changes or data erasure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67671IPZ | 256 KB Flash, 32 KB RAM, 6 SD24_B ADCs - identical peripheral set but higher RAM for complex tariff logic or larger communication buffers. | Preferred when firmware requires extensive data logging, multi-tariff scheduling, or larger OTA update partitions. | Select MSP430F67671IPZ if system design mandates >16 KB RAM for real-time analytics or extended secure boot verification. |
| MSP430F67651IPZ | 128 KB Flash, 16 KB RAM, 6 SD24_B ADCs - same metrology core and low-power performance, reduced memory footprint. | Suitable for cost-optimized single-tariff meters with minimal feature set and fixed firmware. | Choose MSP430F67651IPZ for entry-level revenue meters where BOM cost reduction outweighs future firmware scalability needs. |
Compared with MSP430F67661IPZR, MSP430F67671IPZ offers double the RAM for enhanced data handling without metrology trade-offs, while MSP430F67651IPZ reduces Flash/RAM to lower unit cost - all share identical pinout, package, and metrology accuracy specifications.
Availability
MSP430F67661IPZR is available at Aetrix Electronics and suitable for 3-phase revenue metering, smart grid AMI node deployment, and industrial energy monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MSP430F67661IPZR 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 high-reliability microcontrollers for industrial, automotive, and energy infrastructure markets.
The MSP430F676x1 product line was engineered specifically for revenue-grade polyphase metering - integrating metrology-qualified ADCs, tamper resilience, and ultra-low-power operation to replace discrete metering solutions with single-chip SoCs.
FAQ
What is the maximum number of independent current/voltage channels supported by the MSP430F67661IPZR?
The MSP430F67661IPZR integrates six 24-bit sigma-delta ADCs (SD24_B), each with differential inputs and programmable gain. This supports up to three phase currents, three phase voltages, and neutral current/voltage sensing - sufficient for full 3-phase 4-wire metering with redundancy. All six channels operate simultaneously with hardware-synchronized sampling.
Does the MSP430F67661IPZR include hardware acceleration for energy calculations?
Yes, the MSP430F67661IPZR contains a dedicated hardware energy measurement engine that performs real-time active/reactive energy accumulation, RMS computation, and four-quadrant power analysis without CPU intervention. This ensures deterministic timing, metrology-grade accuracy, and frees the 25-MHz CPU for communication and tariff management tasks.
What low-power modes are available on the MSP430F67661IPZR, and what is the lowest current draw?
The MSP430F67661IPZR supports LPM3 (2.1 µA), LPM3.5 (0.34 µA), and LPM4.5 (0.18 µA) at 3 V. LPM4.5 disables all clocks and retains only RTC and tamper-detection circuitry - enabling >10-year coin-cell operation for secure timekeeping and event logging during mains failure.
Is the MSP430F67661IPZR pin-compatible with other devices in the MSP430F676x1 family?
Yes, all MSP430F676x1 devices in the 100-pin LQFP (PZ) package - including MSP430F67651IPZ, MSP430F67661IPZR, MSP430F67671IPZ, MSP430F67681IPZ, and MSP430F67691IPZ - share identical pinout, package dimensions, and thermal characteristics. Firmware and PCB layout are interchangeable across this variant group.
What communication interfaces does the MSP430F67661IPZR support for smart meter backhaul?
The MSP430F67661IPZR features six enhanced USCI (eUSCI) modules configurable as UART, SPI, or I²C. This enables concurrent support for PLC modems (UART), RF transceivers (SPI), and optical port interfaces (UART/I²C) - meeting requirements for dual-path AMI communication and HAN integration in modern smart meters.
MSP430F67661IPZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 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:
MSP430F67661IPZR FAQ
1.How can I place an order for MSP430F67661IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67661IPZR 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 MSP430F67661IPZR reliable?
The price and inventory of MSP430F67661IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67661IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F67661IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67661IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67661IPZR?
MSP430F67661IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67661IPZR 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 MSP430F67661IPZR?
For technical support, including MSP430F67661IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67661IPZR requirements.
6.How does Aetrix verify that MSP430F67661IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F67661IPZR 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 MSP430F67661IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F67661IPZR?
All MSP430F67661IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67661IPZR, 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 MSP430F67661IPZR part is unused and in its original packaging.
Return procedure for MSP430F67661IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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