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Texas Instruments MSP430F67781IPZ
- Part No.:
- MSP430F67781IPZ
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67781IPZ.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,064
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Product details
Overview
MSP430F67781IPZ from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates seven 24-bit sigma-delta ADCs, a 25-MHz ultra-low-power CPU with 32-bit multiplier, 512KB flash/16KB RAM, LCD controller (320 segments), and hardware energy measurement acceleration - delivering <0.1% accuracy over 2000:1 dynamic range for phase current in utility metering applications.
For engineers reviewing the MSP430F67781IPZ datasheet, MSP430F67781IPZ pinout, MSP430F67781IPZ application, or MSP430F67781IPZ equivalent, this device is selected for ANSI C12.20/IEC 62053-compliant meter designs requiring simultaneous multi-phase power calculation, tamper-resistant RTC, integrated security modules, and flexible communication via four UARTs/six SPIs/two I²C interfaces on a single chip.
Technical Context
The MSP430F67781IPZ implements a dedicated metering subsystem with seven independent SD24_B sigma-delta modulators supporting differential inputs, programmable gain, and AC performance validated to ±0.1% error across 40–70 Hz line frequencies using single-point calibration. Its architecture separates analog front-end acquisition from digital signal processing, enabling concurrent voltage/current sampling per phase plus neutral with exact phase angle resolution and digital CT phase correction.
Power management includes five low-power modes (LPM0–LPM4.5), with LPM3.5 consuming only 0.34 µA at 3 V for RTC operation and LPM4.5 drawing 0.18 µA in shutdown - optimized for battery-backed operation during AC mains failure. The device executes TI's certified energy measurement software library directly from flash, eliminating external co-processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | <0.1% error over 2000:1 dynamic range for phase current - meets ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.2 requirements. |
| CPU Speed | 25 MHz MSP430 core with 32-bit hardware multiplier - enables real-time tariff rate switching and harmonic analysis without external DSP. |
| Memory | 512 KB single-cycle flash + 16 KB single-cycle RAM - sufficient for full meter firmware, calibration tables, and secure boot code storage. |
| ADC System | Seven 24-bit SD24_B sigma-delta converters with differential inputs and variable gain - supports simultaneous 3-phase + neutral current/voltage sensing with anti-aliasing filtering. |
| Low-Power Modes | LPM3.5: 0.34 µA (RTC active); LPM4.5: 0.18 µA (full shutdown) - extends backup battery life to >10 years in smart meter deployments. |
| Communication | Four eUSCI_A (UART/SPI) + two eUSCI_B (SPI/I²C) ports - enables concurrent HAN, WAN, and PLC interface connectivity without multiplexing. |
| LCD Driver | 320-segment bias-controlled LCD controller with contrast adjustment - drives high-visibility meter displays without external segment drivers. |
Pinout & Package
100-pin LQFP (PZ) package, 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 10–19, 21–25, 27–31, 33–38, 40–44, 46–62, 64–100 | General-purpose I/O / Peripheral function multiplexed | 62 configurable GPIO pins supporting UART, SPI, I²C, timer capture/compare, LCD segment/common, and sigma-delta data I/O. |
| 9, 112, 118–120, 122–127 | Analog supply and reference | AVSS2, AVCC, VASYS1/2, DVCC/DVSS1/2, VCORE - segregated analog/digital power domains with internal regulation for noise immunity in metrology. |
| 103–111, 113–117 | Sigma-delta modulator inputs | SD0P0/SD0N0 through SD6P0/SD6N0 - dedicated differential inputs for six current/voltage channels plus one auxiliary channel. |
| 30, 31 | RTC crystal load capacitors | RTCCAP0/RTCCAP1 - connect external 12.5 pF load caps to 32.768 kHz crystal for temperature-compensated timekeeping. |
| 27, 28 | LF crystal oscillator | XIN/XOUT - drive external 32.768 kHz crystal for low-frequency clock source used by RTC and LPM timing. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated pulse output pins | Hardware-generated active/reactive energy pulses (CF1/CF2) for direct connection to calibration LEDs or external counters - eliminates firmware overhead. |
| Password-protected RTC | Real-time clock with crystal offset calibration and temperature compensation - maintains ±2 ppm accuracy across –40°C to +85°C without external trimming. |
| Integrated anti-tamper modules | Dedicated tamper detect pins (PJ.0–PJ.3), voltage/temperature monitoring, and secure memory lock - satisfies IEC 62053-31 tamper detection requirements. |
| Flexible power supply switching | Automatic switchover between main AC-derived supply and backup battery (AUXVCC1–AUXVCC3) - ensures uninterrupted meter operation and data retention during outages. |
| Four-quadrant energy measurement | Per-phase or cumulative forward/reverse active/reactive energy calculation - supports net metering and bidirectional grid interconnection billing. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in residential/commercial 3-phase 4-wire star-connected utility meters for kWh/kVARh billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time RMS, fundamental, and harmonic power calculations with hardware-accelerated energy accumulation. Use Value: Eliminates need for external ADCs, DSPs, or RTC ICs - reduces BOM cost by ≥30% while meeting ANSI/IEC Class 0.2 accuracy. |
Use Scenario: Embedded in industrial submetering panels tracking per-circuit energy consumption and demand. IC Role / Device Role / Timing Role: Standalone energy measurement engine interfacing to shunt/CT sensors and communicating via RS-485 Modbus. Use Value: Single-chip solution with 0.1% accuracy over 2000:1 dynamic range enables precise load profiling even at light loads (<1% of full scale). |
| AMI Gateway Node | Tamper-Resistant Grid Sensor |
Use Scenario: Integrated into cellular/NB-IoT-based AMI endpoints aggregating meter data from multiple units. IC Role / Device Role / Timing Role: Host processor managing secure firmware updates, encrypted data logging, and dual-interface communication (HAN + WAN). Use Value: On-chip AES-128 encryption, secure boot, and tamper-evident memory prevent unauthorized access to billing data and configuration. |
Use Scenario: Deployed in outdoor distribution transformers to monitor voltage sag/swell and harmonic distortion. IC Role / Device Role / Timing Role: High-accuracy sensor node with temperature-compensated measurements and long-life battery operation. Use Value: LPM4.5 current of 0.18 µA extends 3.6 V lithium battery life beyond 10 years - reducing field maintenance cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67791IPZ | 32 KB RAM (vs. 16 KB), identical flash (512 KB), same peripherals and pinout | Required when firmware requires larger runtime buffer for advanced tariff algorithms or extended data logging | Select MSP430F67791IPZ only if application demands >16 KB RAM; otherwise MSP430F67781IPZ offers optimal cost/performance balance. |
| MSP430F67681IPZ | 6 SD24_B ADCs (vs. 7), same CPU, memory, and communication interfaces | Suitable for 2-phase or simplified 3-phase meters where neutral current measurement is omitted | Choose MSP430F67681IPZ to reduce system cost when full 3-phase+neutral metrology is not required. |
Compared with MSP430F67791IPZ and MSP430F67681IPZ, the MSP430F67781IPZ delivers the optimal trade-off of 7-channel metrology capability and 16 KB RAM for standard 3-phase revenue meters - avoiding over-specification while maintaining full ANSI/IEC compliance and pin compatibility within the PZ package family.
Availability
MSP430F67781IPZ is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI gateway node development requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.
Supply support for MSP430F67781IPZ 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 company specializing in analog, embedded processing, and connectivity technologies with leadership in low-power microcontrollers and precision metrology solutions.
The MSP430F67781IPZ belongs to TI's polyphase metering SoC product line, engineered specifically for ANSI/IEC-compliant electricity meters that require integrated metrology, security, display, and communication in a single ultra-low-power device.
FAQ
What is the primary metrology accuracy specification of the MSP430F67781IPZ?
The MSP430F67781IPZ achieves <0.1% error over a 2000:1 dynamic range for phase current measurements, validated per ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.2 standards. This accuracy is enabled by its seven 24-bit SD24_B sigma-delta ADCs with digital phase correction and temperature compensation - all operating without external calibration components. The MSP430F67781IPZ maintains this performance across 40–70 Hz line frequencies using a single-point calibration routine.
Does the MSP430F67781IPZ support hardware-accelerated energy calculation?
Yes, the MSP430F67781IPZ includes dedicated hardware accelerators for active, reactive, and apparent energy accumulation across all measured phases. It executes TI's certified energy measurement software library directly in flash, offloading computation from the CPU. The MSP430F67781IPZ generates standardized CF1/CF2 pulse outputs for active/reactive energy - enabling direct connection to calibration equipment without firmware intervention.
What low-power modes are available on the MSP430F67781IPZ and their typical current draw?
The MSP430F67781IPZ supports five low-power modes: LPM3 (2.1 µA at 3 V), LPM3.5 (0.34 µA for RTC-only operation), and LPM4.5 (0.18 µA in full shutdown). These modes enable >10-year battery life in backup operation. The MSP430F67781IPZ wakes from LPM3 in under 5 µs, allowing rapid response to meter events like tamper detection or load changes - critical for real-time grid monitoring applications.
How many communication interfaces does the MSP430F67781IPZ integrate?
The MSP430F67781IPZ integrates six enhanced universal serial communication interfaces: four eUSCI_A modules (configurable as UART or SPI) and two eUSCI_B modules (configurable as SPI or I²C). This allows concurrent implementation of HAN (e.g., Zigbee via UART), PLC (via SPI), and backhaul (e.g., LTE modem via UART) without external bus expanders. All interfaces operate independently and retain state during low-power mode transitions.
Is the MSP430F67781IPZ pin-compatible with other devices in the F677x1 family?
Yes, the MSP430F67781IPZ shares identical pinout and package (100-pin LQFP, PZ) with all other F677x1 IPZ variants (e.g., MSP430F67791IPZ, MSP430F67771IPZ). This enables hardware reuse across meter tiers - for example, designing a single PCB that supports both 16 KB and 32 KB RAM variants by populating different flash/RAM configurations. Firmware remains binary-compatible within the same peripheral subset.
MSP430F67781IPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tray
- 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:
- 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:
MSP430F67781IPZ FAQ
1.How can I place an order for MSP430F67781IPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67781IPZ 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 MSP430F67781IPZ reliable?
The price and inventory of MSP430F67781IPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67781IPZ is usually 5 days.
3.What payment methods are accepted for MSP430F67781IPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67781IPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67781IPZ?
MSP430F67781IPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67781IPZ 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 MSP430F67781IPZ?
For technical support, including MSP430F67781IPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67781IPZ requirements.
6.How does Aetrix verify that MSP430F67781IPZ is sourced from the original manufacturer or authorized distributors?
All MSP430F67781IPZ 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 MSP430F67781IPZ meets industry standards.
7.What is the process for return or replacement of MSP430F67781IPZ?
All MSP430F67781IPZ units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67781IPZ, 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 MSP430F67781IPZ part is unused and in its original packaging.
Return procedure for MSP430F67781IPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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