My Inquiry
My Account
Texas Instruments MSP430F67781IPZR
- Part No.:
- MSP430F67781IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F67781IPZR.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,194
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSP430F67781IPZR from Texas Instruments is a polyphase metering SoC designed for revenue-grade 3-phase electronic watt-hour meters. It integrates a 25-MHz MSP430 CPU with 32-bit multiplier, seven 24-bit sigma-delta ADCs, LCD controller (320 segments), and real-time clock with temperature compensation - delivering <0.1% energy measurement accuracy over 2000:1 dynamic range in utility metering applications.
For engineers reviewing the MSP430F67781IPZR datasheet, MSP430F67781IPZR pinout, MSP430F67781IPZR application, or MSP430F67781IPZR equivalent, key selection considerations include its 100-pin LQFP (PZ) package, 512KB flash / 16KB RAM configuration, ANSI C12.20 and IEC 62053 compliance, ultra-low-power LPM3.5 mode (0.34 µA), and dedicated pulse outputs for active/reactive energy calibration.
Technical Context
The MSP430F67781IPZR implements a multi-channel sigma-delta AFE architecture with seven independent 24-bit SD24_B converters supporting differential inputs and programmable gain - enabling simultaneous voltage/current sampling across three phases plus neutral. Its integrated energy measurement software library performs real-time computation of kWh, kVARh, RMS, power factor, and harmonics without host CPU intervention.
It features six enhanced eUSCI modules configurable as UART, SPI, or I²C interfaces - supporting AMR/AMI communication stacks - and a tamper-resistant RTC with crystal offset calibration and password protection. Power management includes automatic supply switching between main and backup rails, with LPM4.5 shutdown current of 0.18 µA at 3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 512 KB single-cycle flash - supports field firmware updates and complex tariff management logic in revenue meters. |
| RAM | 16 KB single-cycle RAM - sufficient for real-time energy calculation buffers and communication stack operation. |
| Sigma-Delta ADCs | Seven 24-bit SD24_B converters - enables concurrent high-accuracy sampling of 3-phase voltages, currents, and neutral current. |
| Energy Accuracy | <0.1% over 2000:1 dynamic range - meets ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.2 requirements. |
| Low-Power Mode (LPM3.5) | 0.34 µA at 3 V - sustains RTC and critical registers during AC mains failure with minimal backup battery drain. |
| LCD Driver | Supports up to 320 segments with contrast control - enables full-feature display for utility meter human interface without external driver. |
| Package | 100-pin LQFP (PZ), 14 mm × 14 mm - provides 62 GPIOs and optimized layout for meter PCBs with isolation barriers. |
| Operating Temperature | –40°C to +85°C - qualified for outdoor and industrial metering environments. |
Pinout & Package
Package: 100-pin LQFP (PZ), 14 mm × 14 mm, 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, 46–50, 52–62, 64–77, 79–86, 88–91, 93–100 | General-purpose I/O (P1–P11, PJ) | Configurable digital I/O with Schmitt-trigger inputs; many support secondary functions including eUSCI, timers, and ADC inputs. |
| 9, 20, 32, 39, 45, 51, 63, 78, 87, 89–92, 94–99 | Dedicated analog/digital function pins | Includes XIN/XOUT (32.768 kHz crystal), RTCCAP0/1 (RTC load caps), SDxP0/SDxN0 (sigma-delta modulator inputs), VREF (reference input), AVCC/AVSS (analog supply), DVCC/DVSS (digital supply), VCORE (core supply). |
| 113–117 | SD4P0/SD4N0 to SD5P0/SD5N0 | Differential inputs for four of seven sigma-delta ADC channels - directly connect current transformers or shunt resistors. |
| 104–109, 111, 114–119 | SD0P0/SD0N0 to SD3P0/SD3N0, VASYS1/2, SD6P0/SD6N0 | Remaining sigma-delta inputs and analog system supplies - enable full 3-phase + neutral sensing with dedicated channel assignment. |
| 22–25, 26–29, 31, 35–37 | COM0–COM7, LCDCAP, Sx pins | LCD segment/common drivers and capacitor connection - supports multiplexed 320-segment display with internal bias generation. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated pulse output pins | Hardware-generated active/reactive energy pulses - eliminate software timing jitter and simplify calibration traceability. |
| Digital phase correction | Real-time CT phase error compensation - maintains accuracy across temperature and frequency drift without manual calibration. |
| Password-protected RTC | Secure timekeeping with crystal offset calibration and temperature compensation - prevents tampering and ensures billing integrity. |
| Four-quadrant energy measurement | Per-phase and cumulative forward/reverse active/reactive energy - supports net metering and bidirectional grid applications. |
| Flexible power supply switching | Automatic transition between main AC-derived and backup battery rails - guarantees uninterrupted meter operation during outages. |
| Integrated anti-tamper modules | Detection of case opening, magnetic interference, and power anomalies - triggers secure event logging and alerts. |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in residential/commercial 3-phase 4-wire star-connected utility meters for kWh billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time energy calculation, tariff management, and secure data logging. Use Value: Delivers ANSI C12.20 Class 0.1 accuracy with no external precision components required - reducing BOM cost and calibration labor. | Use Scenario: Embedded in industrial submetering systems monitoring motor-driven loads and HVAC systems. IC Role / Device Role / Timing Role: High-accuracy polyphase energy analyzer with harmonic analysis and demand logging capabilities. Use Value: Seven independent sigma-delta ADCs enable simultaneous voltage/current capture per phase - eliminating inter-channel skew errors in power quality analysis. |
| AMI Gateway Node | Tamper-Resistant Grid Edge Sensor |
Use Scenario: Integrated into cellular/NB-IoT-enabled smart meter gateways for remote firmware updates and time-of-use rate enforcement. IC Role / Device Role / Timing Role: Secure host processor managing communication stacks, encrypted data transmission, and local policy execution. Use Value: Password-protected RTC and integrated security modules ensure time-stamped, non-repudiable energy records for regulatory compliance. | Use Scenario: Deployed in unattended outdoor substations where physical and electromagnetic tampering risks are high. IC Role / Device Role / Timing Role: Tamper-aware metrology controller with magnetic field detection, case-open sensing, and secure event storage. Use Value: On-chip tamper detection logic and backup RAM retention in LPM3.5 mode preserve evidence of intrusion attempts for forensic audit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67791IPZ | Same 100-pin LQFP package, but with 32 KB RAM (vs. 16 KB) and identical 512 KB flash and 7 SD24_B ADCs. | Preferred when larger RAM buffer is needed for extended waveform capture or advanced communication protocols. | Select MSP430F67791IPZ if application requires >16 KB RAM for deep packet buffering or multi-protocol stacks. |
| MSP430F67681IPZ | Same 100-pin LQFP package and 16 KB RAM, but only six 24-bit SD24_B ADCs (vs. seven) and no SD6 channel. | Suitable for 3-phase delta configurations or applications omitting neutral current measurement. | Choose MSP430F67681IPZ to reduce cost where full 3-phase + neutral sensing is not required. |
Compared with MSP430F67791IPZ, the MSP430F67781IPZR offers identical metrology performance and package but trades 16 KB RAM for lower cost; versus MSP430F67681IPZ, it adds the seventh sigma-delta channel for neutral current monitoring - critical for star-connected revenue meters requiring ANSI/IEC compliance.
Availability
MSP430F67781IPZR is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI gateway node development requiring stable component supply and long-term lifecycle support.
Supply support for MSP430F67781IPZR 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 and embedded processing solutions for industrial, automotive, and consumer applications.
The MSP430F67781IPZR belongs to TI's polyphase metering SoC product line, engineered specifically for revenue-grade 3-phase watt-hour meters that demand metrology accuracy, ultra-low-power operation, and integrated security - minimizing external component count and certification effort.
FAQ
What is the primary metrology accuracy specification of the MSP430F67781IPZR?
The MSP430F67781IPZR achieves <0.1% energy measurement accuracy over a 2000:1 dynamic range under specified conditions. This performance meets or exceeds ANSI C12.20 Class 0.1 and IEC 62053-22 Class 0.2 standards for revenue-grade metering. The accuracy is enabled by its seven 24-bit sigma-delta ADCs, digital phase correction, and temperature-compensated reference architecture - all verified in TI's production test flow for the MSP430F67781IPZR device.
Does the MSP430F67781IPZR support neutral current measurement?
Yes, the MSP430F67781IPZR supports neutral current measurement via its seventh 24-bit sigma-delta ADC channel (SD6). Pin assignments SD6P0 and SD6N0 (pins 118 and 119) provide dedicated differential inputs for neutral current sensing - essential for 3-phase 4-wire star-connected metering topologies required by ANSI C12.20 and IEC 62053 standards. This capability is confirmed in the device comparison table and pinout documentation for the MSP430F67781IPZR.
What low-power modes are available on the MSP430F67781IPZR, and what are their typical currents?
The MSP430F67781IPZR supports multiple low-power modes: Standby (LPM3) draws 2.1 µA at 3 V; RTC mode (LPM3.5) consumes 0.34 µA at 3 V; and Shutdown mode (LPM4.5) uses 0.18 µA at 3 V. These values are measured with RTC running and core powered down - enabling extended backup battery life during AC mains failure. All wake-up times are under 5 µs, ensuring rapid response to metering events. These specifications are validated in the SLAS815D datasheet for the MSP430F67781IPZR.
How many communication interfaces does the MSP430F67781IPZR integrate, and how are they configured?
The MSP430F67781IPZR integrates six enhanced Universal Serial Communication Interfaces (eUSCI), configurable as four UART, six SPI, or two I²C ports - with flexible pin mapping across Ports P2–P4. This allows concurrent support for AMR/AMI radio modules (UART), secure element communication (I²C), and peripheral expansion (SPI), all without external level shifters. The configuration is controlled via register settings and documented in the MSP430F67781IPZR user's guide.
Is the MSP430F67781IPZR pin-compatible with other devices in the F677x1 family?
Yes, the MSP430F67781IPZR in the 100-pin LQFP (PZ) package shares identical pinout and footprint with all other PZ-package F677x1 variants (e.g., MSP430F67791IPZ, MSP430F67771IPZ). This enables hardware reuse across different memory/ADC configurations. Pin compatibility is confirmed in TI's Device Comparison table and Package Option Addendum - ensuring no PCB redesign is needed when migrating within the same package variant of the MSP430F67781IPZR family.
MSP430F67781IPZR 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, 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:
MSP430F67781IPZR FAQ
1.How can I place an order for MSP430F67781IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67781IPZR 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 MSP430F67781IPZR reliable?
The price and inventory of MSP430F67781IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67781IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F67781IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67781IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67781IPZR?
MSP430F67781IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67781IPZR 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 MSP430F67781IPZR?
For technical support, including MSP430F67781IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67781IPZR requirements.
6.How does Aetrix verify that MSP430F67781IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F67781IPZR 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 MSP430F67781IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F67781IPZR?
All MSP430F67781IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67781IPZR, 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 MSP430F67781IPZR part is unused and in its original packaging.
Return procedure for MSP430F67781IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430F67781IPZR Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
