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Texas Instruments MSP430F67491IPEU
- Part No.:
- MSP430F67491IPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F67491IPEU.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,712
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Product details
Overview
MSP430F67491IPEU from Texas Instruments is a polyphase metering SoC designed for 3-phase electronic watt-hour meters, featuring four 24-bit sigma-delta ADCs, 512KB flash, 32KB RAM, and ultra-low-power operation (0.18 µA in LPM4.5). It supports ANSI C12.20 and IEC 62053 compliance, digital phase correction, and four-quadrant energy measurement across three phases plus neutral.
For engineers reviewing the MSP430F67491IPEU datasheet, MSP430F67491IPEU pinout, MSP430F67491IPEU application, or MSP430F67491IPEU equivalent, this device is selected for high-accuracy revenue metering designs requiring integrated metrology, LCD driving (up to 320 segments), tamper-resistant RTC, and multi-interface communication (UART/SPI/I²C) in industrial utility environments.
Technical Context
The MSP430F67491IPEU implements a dedicated metrology subsystem with four independent SD24_B sigma-delta modulators-each with differential inputs, programmable gain, and 24-bit resolution-optimized for current transformer, Rogowski coil, or shunt-based sensing. Its 25-MHz CPU with 32-bit hardware multiplier executes TI's energy measurement software library for real-time active/reactive power, RMS, and harmonic calculations.
It integrates dual auxiliary supply domains (AUXVCC1–AUXVCC3) for backup subsystem operation during AC mains failure, enabling <3 µA LCD operation in LPM3 and RTC retention with crystal offset calibration. The device uses separate analog (AVCC/AVSS) and digital (DVCC/DVSS) supply rails with internal voltage regulation (VCORE) and supports 40–70 Hz line frequency with single-point calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 512 KB single-cycle access - enables full energy measurement firmware, tariff management, and secure bootloader storage without external memory. |
| RAM | 32 KB single-cycle access - supports real-time accumulation of multiple energy registers, waveform capture buffers, and communication stack overhead. |
| Sigma-Delta ADCs | 4 × 24-bit SD24_B converters - provides simultaneous phase current/voltage sampling with <0.1% accuracy over 2000:1 dynamic range per channel. |
| Low-Power Modes | LPM4.5: 0.18 µA at 3 V - allows >1-year battery-backed RTC and critical data retention during extended mains outage. |
| LCD Driver | Up to 320 segments with contrast control - drives large-format utility meter displays without external bias generation or segment drivers. |
| Communication Interfaces | 6 eUSCI ports configurable as 4 UART / 6 SPI / 2 I²C - supports concurrent HAN, PLC, and optical port connectivity in smart meter gateways. |
| Package | 128-pin LQFP (PEU), 20 mm × 14 mm - provides 90 GPIOs including dedicated pulse output pins (Sx/COMx) for active/reactive energy calibration signals. |
Pinout & Package
128-pin LQFP (PEU) package with 20 mm × 14 mm body size and exposed thermal pad. Pin functions include dedicated metrology inputs (SD0P0–SD3N0), pulse outputs (S0–S9, COM0–COM7), RTC crystal connections (XIN/XOUT), tamper detection (PJ.0–PJ.3), and dual-domain power pins (AVCC/AVSS, DVCC/DVSS, AUXVCC1–AUXVCC3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0 / SD0N0 – SD3P0 / SD3N0 | Differential analog inputs for SD24_B modulators | Accept ±2.5 V differential signals from current/voltage sensors; support PGA gains up to 32× for shunt-based measurement. |
| S0–S9, COM0–COM7 | Segment/common outputs for LCD driver | Drive up to 320-segment multiplexed LCD directly; support static, 2-, 3-, or 4-mux configurations with programmable bias. |
| P1.0/P1.1 (VeREF−/VeREF+) | External reference input for ADC10_A | Enable precise 10-bit system monitoring (supply/temperature) using user-supplied reference, independent of metrology SD24_B path. |
| AUXVCC3 | Backup subsystem supply rail | Powers RTC, BOR, and basic I/O during main supply loss; supports 3 µA LCD operation in LPM3 with automatic switchover. |
| RST/NMI/SBWTDIO | Reset, non-maskable interrupt, JTAG debug I/O | Enables production programming, field firmware updates, and secure debug access via Spy-Bi-Wire interface. |
Key Features
| Feature | Design Value |
|---|---|
| ANSI C12.20 & IEC 62053 compliance | Validated metrology accuracy <0.1% over 2000:1 dynamic range ensures revenue-grade billing in North America and EU markets. |
| Digital phase correction | Compensates CT-induced phase shift in real time using on-chip DSP engine, eliminating external analog compensation networks. |
| Password-protected RTC with temperature compensation | Retains accurate timekeeping across –40°C to +85°C; prevents unauthorized clock manipulation in tamper-resistant meter deployments. |
| Four-quadrant energy measurement | Calculates import/export active/reactive energy per phase independently, supporting bidirectional grid interconnection and net metering. |
| Integrated anti-tamper modules | Detects case opening, magnetic interference, and power anomaly events via dedicated tamper pins (PJ.x) and internal monitors. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in residential/commercial 3-phase 4-wire service entrances for utility billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time energy calculation, tariff switching, secure data logging, and optical/PLC communication. Use Value: Eliminates need for discrete ADCs, RTC, LCD driver, and communication controllers-reducing BOM count by ≥12 components. |
Use Scenario: Embedded in industrial submetering panels for load profiling and demand response analytics. IC Role / Device Role / Timing Role: High-precision energy accumulator with harmonic analysis, event logging, and time-synchronized waveform capture. Use Value: Delivers 0.1% accuracy across 40–70 Hz line frequencies using single calibration point-cutting factory test time by 65%. |
| AMI Gateway Node | Tamper-Resistant Utility Meter |
Use Scenario: Serving as head-end controller in meshed neighborhood area networks aggregating data from multiple endpoints. IC Role / Device Role / Timing Role: Dual-role processor: metrology engine for local consumption + protocol gateway (DLMS/COSEM over UART/SPI) for upstream reporting. Use Value: Concurrent execution of metrology and communication stacks avoids external MCU, reducing latency and firmware complexity. |
Use Scenario: Deployed in unattended outdoor meter cabinets subject to magnetic, thermal, and physical intrusion attempts. IC Role / Device Role / Timing Role: Security-critical SoC managing tamper detection logic, encrypted EEPROM storage, and zeroization of sensitive keys on violation. Use Value: On-chip tamper response (RTC freeze, memory wipe, alert signaling) meets IEC 62053-31 Class 0.2S security requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67691IPEU | 6 SD24_B ADCs (vs. 4), identical flash/RAM/package; lacks SD4P0/SD4N0–SD6P0/SD6N0 pins | Better suited for 4-phase or split-load 3-phase topologies requiring additional current channels | Select when needing >4 metrology channels; otherwise MSP430F67491IPEU offers optimal cost/performance for standard 3-phase+neutral. |
| MSP430F67481IPEU | Same 4 SD24_B ADCs but only 16 KB RAM (vs. 32 KB); identical flash, package, and peripheral set | Targeted at cost-sensitive meters with simplified tariff schemes and reduced waveform buffer depth | Choose for entry-level meters where full 32 KB RAM for harmonic analysis or extended data logging is unnecessary. |
Compared with MSP430F67691IPEU and MSP430F67481IPEU, the MSP430F67491IPEU balances metrology channel count, memory capacity, and feature set for mainstream 3-phase revenue meters-offering full 32 KB RAM for advanced diagnostics while avoiding over-specification of ADC resources.
Availability
MSP430F67491IPEU is available at Aetrix Electronics and suitable for smart electricity meters, revenue-grade energy monitors, AMI gateway nodes, and tamper-resistant utility meters requiring stable component supply across multi-year production cycles.
Supply support for MSP430F67491IPEU 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 and embedded processing technologies, with leadership in low-power microcontrollers and precision metrology solutions.
The MSP430F67491IPEU belongs to TI's polyphase metering SoC product line, engineered specifically for ANSI/IEC-compliant revenue meters that demand integrated metrology, ultra-low standby power, and robust anti-tamper capabilities.
FAQ
What is the primary metrology capability of the MSP430F67491IPEU?
The MSP430F67491IPEU integrates four independent 24-bit sigma-delta ADCs (SD24_B) optimized for current and voltage sensing in 3-phase+neutral metering. It achieves <0.1% accuracy over 2000:1 dynamic range and supports digital phase correction, four-quadrant energy calculation, and compliance with ANSI C12.20 and IEC 62053 standards-all executed in real time by its 25-MHz CPU and TI energy measurement software library.
Does the MSP430F67491IPEU support LCD display driving?
Yes, the MSP430F67491IPEU includes an integrated LCD_C peripheral capable of driving up to 320 segments with programmable bias, frame frequency, and contrast control. It operates down to 3 µA in LPM3 mode during AC mains failure, making it ideal for battery-backed utility meter displays without external LCD controllers.
How does the MSP430F67491IPEU handle power loss scenarios?
The MSP430F67491IPEU features three auxiliary supply rails (AUXVCC1–AUXVCC3) that automatically switch to backup power during mains failure. In LPM4.5 mode, it draws just 0.18 µA at 3 V to retain RTC state and critical registers, while LPM3 enables 3 µA LCD operation-ensuring uninterrupted timekeeping and display visibility for >1 year on a coin-cell battery.
What communication interfaces are available on the MSP430F67491IPEU?
The MSP430F67491IPEU provides six enhanced universal serial communication interfaces (eUSCI), configurable as four UARTs, six SPIs, or two I²C ports. These support concurrent connectivity to optical ports, PLC modems, RF transceivers, and HAN devices-enabling full DLMS/COSEM protocol stack implementation without external interface ICs.
Is the MSP430F67491IPEU pin-compatible with other members of the F674x1 family?
Yes, all MSP430F674x1 variants-including MSP430F67491IPEU, MSP430F67481IPEU, and MSP430F67471IPEU-share identical 128-pin LQFP (PEU) packaging, pinout, and peripheral mapping. Differences are limited to internal resource allocation (flash, RAM, SD24_B count), allowing drop-in replacement within the same package footprint.
MSP430F67491IPEU 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, 4x24b Sigma Delta Converter
- Number of I/O:
- 90
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K 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:
MSP430F67491IPEU FAQ
1.How can I place an order for MSP430F67491IPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67491IPEU 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 MSP430F67491IPEU reliable?
The price and inventory of MSP430F67491IPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67491IPEU is usually 5 days.
3.What payment methods are accepted for MSP430F67491IPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67491IPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67491IPEU?
MSP430F67491IPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67491IPEU 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 MSP430F67491IPEU?
For technical support, including MSP430F67491IPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67491IPEU requirements.
6.How does Aetrix verify that MSP430F67491IPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F67491IPEU 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 MSP430F67491IPEU meets industry standards.
7.What is the process for return or replacement of MSP430F67491IPEU?
All MSP430F67491IPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67491IPEU, 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 MSP430F67491IPEU part is unused and in its original packaging.
Return procedure for MSP430F67491IPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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