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Texas Instruments MSP430F67641IPZR
- Part No.:
- MSP430F67641IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67641IPZR.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
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Product details
Overview
MSP430F67641IPZR from Texas Instruments is a polyphase metering system-on-chip (SoC) designed for revenue-grade 3-phase electricity meters. It integrates three independent 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit hardware multiplier, 128KB flash, 8KB RAM, and an LCD controller supporting up to 320 segments - enabling <0.5% accuracy over 2000:1 dynamic range per phase while meeting ANSI C12.20 and IEC 63053 standards.
For engineers reviewing the MSP430F67641IPZR datasheet, MSP430F67641IPZR pinout, MSP430F67641IPZR application, or MSP430F67641IPZR equivalent, this device delivers verified metrology performance in ultra-low-power operation (2.5 µA in LPM3), RTC with AUXVCC3 backup, flexible communication (3 UART / 3 SPI / 1 I²C), and full support for current transformers, Rogowski coils, and shunt sensors in utility-grade metering systems.
Technical Context
The MSP430F67641IPZR implements a dedicated metrology subsystem with three synchronized SD24_B modulators feeding digital filters and calibration engines - each configured for differential current/voltage sensing with programmable gain. Its real-time clock operates from isolated AUXVCC3, enabling continuous timekeeping during AC mains failure at 1.24 µA (LPM3.5).
Power management includes automatic supply switching between DVCC, AUXVCC1, and AUXVCC2, while the 100-pin LQFP package supports 72 GPIOs, four 16-bit timers with nine capture/compare registers, and hardware-accelerated energy calculation via TI's licensed energy measurement software library - all executing from on-chip flash without external co-processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Three independent 24-bit sigma-delta ADCs with differential inputs and variable gain - enables simultaneous high-accuracy current/voltage sampling per phase. |
| Accuracy | <0.5% error over 2000:1 dynamic range for phase current - certified for ANSI C12.20 and IEC 63053 revenue metering compliance. |
| CPU Speed | 25-MHz MSP430 core with 32-bit hardware multiplier - executes energy calculations, tariff management, and communications in real time. |
| Memory | 128KB flash (single-cycle execution) + 8KB RAM (single-cycle access) - sufficient for full meter firmware, calibration tables, and secure data logging. |
| Low-Power Modes | LPM3: 2.5 µA @ 3 V; LPM3.5 (RTC active): 1.24 µA @ 3 V; LPM4.5 (shutdown): 0.78 µA @ 3 V - extends battery backup runtime during mains failure. |
| Communication | Four eUSCI ports configurable as 3 UART, 3 SPI, or 1 I²C - supports AMR/AMI modules, optical ports, and PLC interfaces without external transceivers. |
| LCD Support | Driver for up to 320 segments with contrast control and dedicated LCDCAP pin - eliminates need for external LCD bias generators. |
Pinout & Package
Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, industrial temperature range (–40°C to +85°C). Pin count includes 72 general-purpose I/Os with mappable secondary functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0/SD0N0 SD1P0/SD1N0 SD2P0/SD2N0 | Differential analog inputs for three SD24_B modulators | Accept direct connection to current transformer secondaries, Rogowski coil outputs, or shunt resistor voltage drops - fully differential, high CMRR input stage. |
| VREF, AVCC, AVSS | Analog reference and power supply rails | Support external 2.5V reference or internal VREF generation; separate analog domain ensures metrology-grade noise isolation. |
| AUXVCC3 | Dedicated RTC power supply | Enables continuous real-time clock operation during main power loss - powered independently from DVCC/AVCC domains. |
| P1.4/P1.5/LCDCAP/R33 | LCD voltage reference and capacitor node | Generates regulated LCD bias voltages (V1–V5); LCDCAP must be tied to DVSS if unused to prevent floating node instability. |
| XIN/XOUT | 32.768-kHz crystal oscillator terminals | Drive low-frequency crystal for RTC with integrated offset and temperature calibration - no external load capacitors required in basic configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Digital phase correction | Compensates CT-induced phase shift in software using calibrated delay values - maintains true power accuracy across line frequencies (40–70 Hz) with single-point calibration. |
| Four-quadrant measurement | Computes active/reactive/apparent power and energy in all quadrants per phase or cumulatively - essential for bidirectional grid-tied and net-metering applications. |
| Password-protected RTC | Prevents unauthorized time tampering; includes crystal offset calibration and temperature compensation - meets ANSI C12.19 security requirements for revenue meters. |
| Flexible power supply switching | Automatically selects optimal source among DVCC, AUXVCC1, AUXVCC2 - simplifies design of dual-supply meter front-ends with battery/supercap backup. |
| Energy measurement library | TI-provided, royalty-free firmware library performing all ANSI/IEC-compliant energy calculations - reduces certification effort and validation time. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in residential or 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 voltage/current sampling, energy accumulation, tariff switching, and secure time-stamped data logging. Use Value: Delivers <0.5% accuracy over 2000:1 dynamic range and meets ANSI C12.20 Class 0.2 and IEC 63053 Class 1 - enabling direct revenue-grade deployment without external calibration ICs. | Use Scenario: Embedded in industrial submetering gateways monitoring motor drives, HVAC, or renewable generation points. IC Role / Device Role / Timing Role: High-precision energy analyzer capturing harmonic content, power factor, and reactive energy with four-quadrant capability. Use Value: Three independent 24-bit ADCs enable simultaneous phase-resolved measurements; RTC with AUXVCC3 ensures timestamp integrity during brownouts. |
| AMI Communication Node | Backup-Powered Metering Module |
Use Scenario: Integrated into smart meter designs with RF or PLC communication modules for automated meter reading and remote firmware updates. IC Role / Device Role / Timing Role: Host processor managing AMI protocol stacks (DLMS/COSEM), secure boot, and encrypted data transmission alongside metrology tasks. Use Value: Four configurable eUSCI ports eliminate need for external UART/SPI bridges; 128KB flash stores dual-application images for field-upgradable firmware. | Use Scenario: Used in critical infrastructure meters requiring >10-year battery-backed operation during extended grid outages. IC Role / Device Role / Timing Role: Ultra-low-power metrology engine maintaining time, accumulating energy, and preserving tamper logs in LPM3.5 mode. Use Value: 1.24 µA RTC current at 3 V extends CR2032 battery life beyond 10 years; password-protected RTC prevents time manipulation during backup operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67621IPZR | 64KB flash, 4KB RAM, same ADC/peripheral set - lower memory capacity but identical metrology engine and pinout. | Suitable for cost-sensitive meters with simpler tariff schemes or reduced data logging depth. | Select when firmware footprint fits within 64KB and no future feature expansion is planned. |
| ADuCM3029BBCZ | ARM Cortex-M3 core, 256KB flash, 64KB SRAM, dual 16-bit SAR ADCs - higher processing headroom but no integrated 24-bit sigma-delta metrology ADCs. | Requires external metrology ADCs and calibration firmware; better for mixed-signal IoT edge nodes than pure revenue meters. | Choose only if ARM ecosystem compatibility or advanced connectivity (e.g., BLE stack) outweighs metrology integration benefits. |
Compared with MSP430F67621IPZR, the MSP430F67641IPZR provides double flash/RAM for complex tariff logic and extended data history, while ADuCM3029BBCZ trades integrated metrology for general-purpose processing flexibility - making MSP430F67641IPZR the optimal choice for certified, low-risk, high-volume utility meter designs.
Availability
MSP430F67641IPZR is available at Aetrix Electronics and suitable for 3-phase electronic watt-hour meters, utility metering infrastructure, and industrial energy monitoring systems requiring stable component supply, long-term lifecycle assurance, and TI-qualified metrology performance.
Supply support for MSP430F67641IPZR 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 applications.
The MSP430F676x1 product line was engineered specifically for revenue-grade polyphase electricity metering - integrating metrology-grade ADCs, ultra-low-power operation, and certified software libraries to reduce time-to-certification for ANSI/IEC-compliant meters.
FAQ
What metrology standards does the MSP430F67641IPZR meet?
The MSP430F67641IPZR meets or exceeds ANSI C12.20 Class 0.2 and IEC 63053 Class 1 accuracy requirements for revenue-grade 3-phase meters. Its 24-bit sigma-delta ADC architecture, digital phase correction, and 40–70 Hz line frequency support with single calibration enable certified performance across global utility specifications - validated by TI's energy measurement software library and reference designs like EVM430-F67641.
Does the MSP430F67641IPZR support RTC operation during AC mains failure?
Yes, the MSP430F67641IPZR supports continuous RTC operation during AC mains failure using its dedicated AUXVCC3 power supply rail. In LPM3.5 mode, it draws only 1.24 µA at 3 V while maintaining accurate timekeeping, crystal offset calibration, and temperature compensation - ensuring tamper-resistant timestamps for energy logs even during extended outages.
How many analog inputs does the MSP430F67641IPZR support for current and voltage sensing?
The MSP430F67641IPZR supports six dedicated differential analog inputs across three SD24_B modulators: SD0P0/SD0N0, SD1P0/SD1N0, and SD2P0/SD2N0. These accept direct connections from current transformers, Rogowski coils, or shunt resistors, enabling simultaneous sampling of three phase currents and corresponding voltages - with full four-quadrant measurement capability per phase.
What communication interfaces are available on the MSP430F67641IPZR?
The MSP430F67641IPZR provides four eUSCI modules configurable as up to three UARTs, three SPIs, and one I²C interface - totaling nine logical serial channels. This enables concurrent connections to AMI modules (e.g., RF/PLC), optical port readers, and external security ICs without multiplexing or external bus expanders, all while maintaining deterministic timing for time-critical metrology tasks.
Is the MSP430F67641IPZR pin-compatible with other devices in the F676x1 family?
Yes, the MSP430F67641IPZR in the 100-pin LQFP (PZ) package is pin-compatible with the MSP430F67621IPZR - sharing identical pin assignments, peripheral mappings, and power domain connections. This allows hardware reuse across meter tiers, where the F67641IPZR serves high-feature deployments (128KB flash) and the F67621IPZR targets cost-optimized variants (64KB flash) without PCB redesign.
MSP430F67641IPZR 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, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT, 3x24b Sigma Delta Converter
- Number of I/O:
- 72
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K 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:
MSP430F67641IPZR FAQ
1.How can I place an order for MSP430F67641IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67641IPZR 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 MSP430F67641IPZR reliable?
The price and inventory of MSP430F67641IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67641IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F67641IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67641IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67641IPZR?
MSP430F67641IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67641IPZR 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 MSP430F67641IPZR?
For technical support, including MSP430F67641IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67641IPZR requirements.
6.How does Aetrix verify that MSP430F67641IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F67641IPZR 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 MSP430F67641IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F67641IPZR?
All MSP430F67641IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67641IPZR, 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 MSP430F67641IPZR part is unused and in its original packaging.
Return procedure for MSP430F67641IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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