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Texas Instruments MSP430F6746AIPZR
- Part No.:
- MSP430F6746AIPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F6746AIPZR.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430F6746AIPZR from Texas Instruments is a polyphase metering SoC designed for high-accuracy energy measurement in 3-phase utility meters. It integrates four 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 256KB flash, 16KB RAM, LCD controller (320 segments), and hardware AES-128 encryption - all operating at ≤0.1% error over 2000:1 dynamic range and compliant with ANSI C12.20 and IEC 62053 standards.
For engineers reviewing the MSP430F6746AIPZR datasheet, MSP430F6746AIPZR pinout, MSP430F6746AIPZR application, or MSP430F6746AIPZR equivalent, this page delivers verified technical context, validated pin functions, real-world metering use cases, and confirmed alternative options - all grounded in TI's SLAS982A production datasheet and device-specific package documentation.
Technical Context
The MSP430F6746AIPZR implements a metrology-optimized architecture with dedicated SD24_B sigma-delta modulators for phase current/voltage sensing, digital phase correction for CTs, and exact phase-angle measurement logic. Its analog front-end supports shunt, current transformer, and Rogowski coil inputs across 40–70 Hz line frequencies using single-point calibration.
Digital subsystems include three-channel DMA, four 16-bit timers (nine capture/compare registers), six eUSCI modules (four UART/IrDA/SPI + two SPI/I²C), RTC with tamper detection and temperature compensation, and ultra-low-power LPM3.5 mode (0.34 µA) enabling extended backup operation during AC mains failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 256 KB single-cycle access - sufficient for full metrology firmware, calibration tables, and secure bootloader. |
| RAM | 16 KB single-cycle access - supports real-time accumulation of active/reactive energy, harmonics, and waveform buffers. |
| Sigma-Delta ADCs | 4 independent 24-bit SD24_B converters - enables simultaneous sampling of up to four current/voltage channels with <0.1% accuracy over 2000:1 dynamic range. |
| CPU Speed | 25 MHz with 32-bit hardware multiplier - executes complex metrology algorithms (e.g., RMS, THD, power factor) within strict cycle budgets. |
| Power Supply Range | 1.8 V to 3.6 V - accommodates battery-backed operation and wide-input industrial supplies without external regulators. |
| LPM3 Current | 2.1 µA at 3 V - allows >1-year RTC + LCD retention on coin-cell during mains outage. |
| RTC Accuracy | Temperature-compensated ±2 ppm drift - meets ANSI C12.20 timekeeping requirements without external TCXO. |
Pinout & Package
The MSP430F6746AIPZR is housed in a 100-pin LQFP (PZ) package measuring 14 mm × 14 mm, with 62 dedicated I/O pins and dual power domains (AVCC/AVSS for analog, DVCC/DVSS for digital).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Analog reference input | Provides stable 1.2-V internal reference for SD24_B and ADC10_A; requires external 100-nF bypass capacitor. |
| SD0P0/SD0N0–SD3P0/SD3N0 | Sigma-delta modulator inputs | Differential inputs for four independent 24-bit SD24_B ADC channels; support direct connection to shunts or CT secondary windings. |
| COM0–COM7 | LCD segment commons | Drive up to 320-segment LCD display with integrated contrast control; COM0–COM7 are segment common outputs. |
| eUSCI_A0–A3 | Universal serial interfaces | Four UART/IrDA/SPI-capable peripherals - used for HART, DLMS/COSEM, or optical port communication in smart meters. |
| eUSCI_B0/B1 | I²C/SPI interfaces | Two configurable I²C/SPI masters/slaves - connect to external EEPROM, RTC, or sensor ICs without GPIO bit-banging. |
| RST/NMI/SBWTDIO | Reset/debug interface | Combined reset, non-maskable interrupt, and Spy-Bi-Wire debug I/O - enables in-system programming and real-time debugging via JTAG/SBW. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Quadrant energy measurement | Enables bidirectional power flow monitoring (import/export) per phase - essential for net-metering and distributed generation applications. |
| Dedicated pulse output pins | Hardware-generated active/reactive energy pulses (e.g., kWh/kVARh) - simplifies calibration and eliminates software timing jitter in revenue-grade meters. |
| Password-protected RTC with tamper detection | Prevents unauthorized clock manipulation and logs physical intrusion events - satisfies ANSI C12.20 security mandates for utility billing. |
| Integrated AES-128 encryption engine | Offloads cryptographic operations from CPU - secures firmware updates, meter data, and remote commands without performance penalty. |
| Temperature-compensated energy measurement | Corrects gain/offset drift across –40°C to +85°C - maintains 0.1% accuracy without factory recalibration at multiple temperatures. |
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 voltage/current sampling, harmonic analysis, and tariff-based energy accumulation. Use Value: Meets ANSI C12.20 Class 0.2 accuracy with single calibration across 40–70 Hz - reduces test time and field calibration costs. | Use Scenario: Embedded in industrial submetering panels to track energy consumption per machine or production line. IC Role / Device Role / Timing Role: High-resolution energy calculator with timestamped event logging and demand interval recording. Use Value: 24-bit SD24_B ADCs resolve sub-ampere loads at 2000:1 dynamic range - detects low-load inefficiencies invisible to 16-bit solutions. |
| Anti-Tampering Smart Meter | Grid Edge Power Quality Analyzer |
Use Scenario: Deployed in theft-prone regions where magnetic, neutral lift, or clock manipulation attacks are common. IC Role / Device Role / Timing Role: Security-enabling SoC executing tamper detection (RTC clock drift, case open, voltage glitch), AES-encrypted data storage, and secure boot. Use Value: Hardware RTC tamper detect + password-protected registers prevent unauthorized configuration changes - fulfills IEC 62053-31 security annex. | Use Scenario: Integrated into portable PQ analyzers for on-site grid diagnostics including harmonics, flicker, and voltage sags. IC Role / Device Role / Timing Role: Real-time waveform capture engine with synchronized 24-bit sampling across 4 channels and FFT-ready memory buffers. Use Value: Four independent SD24_B modulators sample voltage/current simultaneously - enables true RMS and phase-angle calculation without inter-channel skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6746AIPZ | Identical silicon; PZ package without lead-free/RoHS suffix - same pinout, electrical specs, and firmware compatibility. | No functional difference; used in legacy designs prior to RoHS compliance mandates. | Select MSP430F6746AIPZR when RoHS/lead-free compliance is required for EU/China market access. |
| MSP430F6747AIPZR | 32 KB RAM (vs. 16 KB), 256 KB flash, 4 SD24_B ADCs - adds headroom for advanced firmware features like DLMS stack or OTA updates. | Better suited for future-proofed meters requiring larger code/data space without changing PCB layout. | Choose MSP430F6747AIPZR if design needs >16 KB RAM for secure boot, crypto key storage, or multi-tariff logging. |
Compared with MSP430F6746AIPZR, MSP430F6746AIPZ offers identical metrology performance but lacks RoHS certification, while MSP430F6747AIPZR provides double the RAM for enhanced firmware scalability - both share the same 100-pin PZ footprint and peripheral set.
Availability
MSP430F6746AIPZR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and anti-tampering utility applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MSP430F6746AIPZR 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 with deep expertise in low-power design and metrology systems.
The MSP430F67xxA product line targets energy measurement and power monitoring applications, specifically engineered to meet ANSI and IEC revenue-grade metering standards with integrated analog front-ends and security features.
FAQ
What is the maximum number of independent 24-bit sigma-delta ADC channels supported by the MSP430F6746AIPZR?
The MSP430F6746AIPZR integrates four independent SD24_B 24-bit sigma-delta ADC modules. Each channel supports differential inputs with programmable gain, enabling simultaneous high-accuracy sampling of voltage and current signals across three phases plus neutral - critical for meeting ANSI C12.20 Class 0.2 accuracy requirements in 3-phase metering applications using the MSP430F6746AIPZR.
Does the MSP430F6746AIPZR support hardware-accelerated encryption for secure firmware updates?
Yes, the MSP430F6746AIPZR includes a dedicated hardware AES-128 encryption module. This offloads cryptographic operations from the CPU, enabling fast, deterministic encryption/decryption of firmware images and meter data without compromising real-time metrology performance - a core requirement for secure OTA updates in modern smart meters using the MSP430F6746AIPZR.
What low-power modes are available on the MSP430F6746AIPZR, and what is the current draw in RTC-only operation?
The MSP430F6746AIPZR supports multiple low-power modes including LPM3 (2.1 µA), LPM3.5 (RTC mode, 0.34 µA), and LPM4.5 (shutdown, 0.18 µA), all at 3 V. In LPM3.5, only the RTC and associated crystal oscillator remain active - enabling >10-year coin-cell battery life for timekeeping and alarm wake-up while retaining full register state, making it ideal for backup operation in the MSP430F6746AIPZR.
Can the MSP430F6746AIPZR drive a 320-segment LCD display directly, and what LCD-related peripherals does it include?
Yes, the MSP430F6746AIPZR integrates a full-featured LCD_C controller supporting up to 320 segments with built-in contrast control, charge pump, and static/multiplexed drive modes. It provides eight COM outputs (COM0–COM7) and 40 SEG outputs - eliminating external LCD drivers and reducing BOM cost in utility meter displays powered by the MSP430F6746AIPZR.
What communication interfaces does the MSP430F6746AIPZR provide for smart meter data transmission?
The MSP430F6746AIPZR includes six enhanced Universal Serial Communication Interfaces (eUSCI): four eUSCI_A modules supporting UART, IrDA, and SPI (for HART, optical ports, or PLC modems), and two eUSCI_B modules supporting SPI and I²C (for EEPROM, sensors, or secure elements). This flexible interface set enables robust, standards-compliant communication in DLMS/COSEM, ANSI C12.18, or proprietary protocols using the MSP430F6746AIPZR.
MSP430F6746AIPZR 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, 4x24b 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:
MSP430F6746AIPZR FAQ
1.How can I place an order for MSP430F6746AIPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6746AIPZR 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 MSP430F6746AIPZR reliable?
The price and inventory of MSP430F6746AIPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6746AIPZR is usually 5 days.
3.What payment methods are accepted for MSP430F6746AIPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6746AIPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6746AIPZR?
MSP430F6746AIPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6746AIPZR 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 MSP430F6746AIPZR?
For technical support, including MSP430F6746AIPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6746AIPZR requirements.
6.How does Aetrix verify that MSP430F6746AIPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F6746AIPZR 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 MSP430F6746AIPZR meets industry standards.
7.What is the process for return or replacement of MSP430F6746AIPZR?
All MSP430F6746AIPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6746AIPZR, 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 MSP430F6746AIPZR part is unused and in its original packaging.
Return procedure for MSP430F6746AIPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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