My Inquiry
My Account
Texas Instruments MSP430F67491AIPEU
- Part No.:
- MSP430F67491AIPEU
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
MSP430F67491AIPEU.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,621
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSP430F67491AIPEU from Texas Instruments is a polyphase metering system-on-chip (SoC) designed for 3-phase electronic watt-hour meters. It integrates four independent 24-bit sigma-delta ADCs, a 25-MHz CPU with 32-bit multiplier, 512KB flash/32KB RAM, LCD controller (320 segments), and dual eUSCI modules supporting UART/I²C/SPI - enabling ANSI C12.20 and IEC 62053-compliant energy measurement across three phases plus neutral.
For engineers reviewing the MSP430F67491AIPEU datasheet, MSP430F67491AIPEU pinout, MSP430F67491AIPEU application, or MSP430F67491AIPEU equivalent, this device is selected for high-accuracy (<0.1% over 2000:1 dynamic range), ultra-low-power metering (0.18 µA in LPM4.5), tamper-resistant RTC, and integrated metrology peripherals requiring no external ADC or calibration ICs.
Technical Context
The MSP430F67491AIPEU implements a dedicated metrology architecture with four SD24_B sigma-delta modulators feeding digital filters and energy calculation engines, supporting exact phase-angle measurement and digital CT phase correction. Its analog front-end includes dedicated reference voltage (VREF), auxiliary supplies (AUXVCC1–3), and isolated analog power domains (VASYS1/2, AVCC/AVSS).
Digital subsystems include three-channel DMA, 16-bit CRC, four Timer_A modules (9 capture/compare registers total), and six eUSCI interfaces - four eUSCI_A (UART/IrDA/SPI) and two eUSCI_B (SPI/I²C) - all configurable for smart meter communication stacks including DLMS/COSEM and ANSI Type 2/5 protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Four independent 24-bit sigma-delta ADCs (SD24_B) for simultaneous phase current/voltage sampling |
| Accuracy | <0.1% error over 2000:1 dynamic range per phase, meeting ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S |
| CPU & Memory | 25-MHz MSP430 CPU with 32-bit hardware multiplier; 512KB single-cycle flash, 32KB single-cycle RAM |
| Power Modes | LPM4.5 shutdown current = 0.18 µA at 3 V; LPM3 standby = 2.1 µA; RTC mode (LPM3.5) = 0.34 µA |
| Communication | Six eUSCI modules: four eUSCI_A (UART/IrDA/SPI), two eUSCI_B (SPI/I²C); supports HART, M-Bus, and PLC modem interfacing |
| LCD Driver | Up to 320-segment LCD controller with programmable contrast, operating at ≤3 µA during AC mains failure |
| Package | 128-pin LQFP (PEU), 20 mm × 14 mm body, 90 GPIO pins, thermal pad exposed on bottom |
Pinout & Package
Package: 128-pin LQFP (PEU), 20 mm × 14 mm body size, 0.5 mm pitch, thermally enhanced with exposed pad. Designed for industrial meter PCB layouts requiring isolation between analog (AVCC/AVSS/VASYS) and digital (DVCC/DVSS/VCORE) domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD0P0 / SD0N0 – SD3P0 / SD3N0 | Differential inputs for 4× SD24_B ADC channels | Accept ±2.5 V differential signals from shunts or current transformers; support 4-quadrant active/reactive energy computation |
| VREF | Reference voltage input for sigma-delta modulators | 2.5 V internal reference; enables ratiometric measurement and eliminates need for external precision reference IC |
| COM0–COM7 | LCD segment/common driver outputs | Drive up to 320-segment LCD directly; COM0–COM7 serve as common lines; P1.6/P1.7/P2.0–P2.3 also configurable as COM |
| eUSCI_A0–A3, eUSCI_B0–B1 | Serial interface transceivers | Support concurrent UART (optical port), SPI (metrology sensor bus), and I²C (RTC/tamper sensor) without software overhead |
| RTCCAP0 / RTCCAP1 | RTC crystal load capacitors | Enable temperature-compensated 32.768 kHz crystal operation; support crystal offset calibration via TLV memory |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated pulse output pins | Separate active/reactive energy pulse outputs (e.g., P1.0/P1.1) enable direct LED calibration without firmware intervention |
| Password-protected RTC with tamper detection | Hardware-enforced RTC lockout, timestamped tamper events, and automatic backup to RAM upon mains loss |
| Temperature-compensated energy measurement | On-chip temperature sensor feeds real-time gain/offset correction to SD24_B modulators, maintaining accuracy across –40°C to +85°C |
| Flexible power supply with auto-switching | Supports dual-supply operation (AVCC/DVCC) and automatic switchover to backup battery during AC failure |
| Energy Measurement Design Center (EMDC) compatibility | Full integration with TI's EMDC GUI for automated calibration, library configuration, and ANSI/IEC compliance reporting |
Applications
| Smart Electricity Meter | Revenue-Grade Energy Monitor |
|---|---|
Use Scenario: Installed in utility-owned 3-phase 4-wire star-connected meters for residential/commercial billing. IC Role / Device Role / Timing Role: Primary metrology SoC performing real-time active/reactive energy accumulation, phase-angle analysis, and tariff switching. Use Value: Eliminates external ADC, DSP, and RTC; achieves Class 0.2 accuracy with single-chip solution and <0.1% linearity error. |
Use Scenario: Embedded in industrial submetering panels tracking per-circuit consumption and power quality. IC Role / Device Role / Timing Role: High-resolution energy accumulator with harmonic analysis capability via 24-bit ADC oversampling and DMA-driven FFT preprocessing. Use Value: Delivers 0.1% accuracy over 2000:1 dynamic range at 50/60 Hz, enabling detection of low-load theft and transformer inefficiency. |
| AMI Endpoint Node | Tamper-Resistant Grid Sensor |
Use Scenario: Integrated into ANSI C12.19-compliant AMI endpoints communicating via RF mesh or PLC backhaul. IC Role / Device Role / Timing Role: Secure data acquisition node with encrypted storage, secure boot, and time-synchronized event logging. Use Value: On-chip AES-128 engine and password-protected RTC enable DLMS/COSEM conformance and audit-ready tamper logs. |
Use Scenario: Deployed in unattended outdoor substations where physical tampering or magnetic interference is a risk. IC Role / Device Role / Timing Role: Anti-tamper metrology core with magnetic field detection (via Hall sensor interface), enclosure breach monitoring, and secure RTC timestamping. Use Value: Hardware tamper detect pins (e.g., RTCCLK, RST/NMI) trigger immediate non-volatile event logging and zeroization of calibration constants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar polyphase metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F67691AIPEU | 6× SD24_B ADCs (vs. 4), identical package, flash/RAM, and peripheral set | Supports 4-phase or higher-channel metrology; adds one extra current channel for neutral monitoring or redundancy | Select when >4 differential current inputs required; same PCB layout and firmware base |
| MSP430F67481AIPEU | Same 4× SD24_B ADCs but reduced RAM (16 KB vs. 32 KB); identical flash, package, and peripherals | Suitable for cost-optimized meters with simpler tariff logic or smaller firmware footprint | Choose for BOM cost reduction where full 32 KB RAM is unused; pin-compatible drop-in replacement |
Compared with MSP430F67691AIPEU, the MSP430F67491AIPEU trades one sigma-delta channel for lower system cost while retaining full 3-phase metrology capability; versus MSP430F67481AIPEU, it provides double RAM for complex tariff scheduling and extended data logging without external SRAM.
Availability
MSP430F67491AIPEU is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and AMI endpoint deployments requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade certification.
Supply support for MSP430F67491AIPEU 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 focus on industrial, automotive, and energy infrastructure markets.
The MSP430F67491AIPEU belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, ultra-low-power energy measurement in smart grid and utility metering applications - prioritizing metrology precision, security, and regulatory compliance over general-purpose compute.
FAQ
What metrology standards does the MSP430F67491AIPEU meet?
The MSP430F67491AIPEU meets or exceeds ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S accuracy requirements for active energy measurement. Its <0.1% error over 2000:1 dynamic range, 4-quadrant computation, and temperature-compensated design ensure compliance across full operating temperature and line frequency (40–70 Hz) ranges without recalibration.
How many sigma-delta ADC channels does the MSP430F67491AIPEU integrate?
The MSP430F67491AIPEU integrates four independent 24-bit sigma-delta ADCs (SD24_B modules), each with differential inputs and programmable gain. These support simultaneous sampling of up to four current/voltage pairs - sufficient for full 3-phase + neutral metering with dedicated neutral current measurement.
Does the MSP430F67491AIPEU support LCD display driving?
Yes, the MSP430F67491AIPEU includes an integrated LCD controller supporting up to 320 segments with programmable bias and contrast. It operates at ≤3 µA in LPM3 during AC mains failure, enabling battery-backed display retention for critical status indication without external drivers.
What low-power modes are available on the MSP430F67491AIPEU?
The MSP430F67491AIPEU offers six low-power modes: LPM3 (2.1 µA), LPM3.5 (RTC active, 0.34 µA), and LPM4.5 (full shutdown, 0.18 µA). All retain RAM content and support wake-up via metrology interrupts, RTC alarms, or serial activity - essential for battery-operated metering during grid outages.
Is the MSP430F67491AIPEU pin-compatible with other devices in the F67xx1A family?
Yes, the MSP430F67491AIPEU shares identical 128-pin LQFP (PEU) package, pinout, and peripheral mapping with all F67xx1A variants in the same package option - including MSP430F67691AIPEU and MSP430F67791AIPEU - enabling hardware reuse across meter performance tiers.
MSP430F67491AIPEU 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:
MSP430F67491AIPEU FAQ
1.How can I place an order for MSP430F67491AIPEU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F67491AIPEU 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 MSP430F67491AIPEU reliable?
The price and inventory of MSP430F67491AIPEU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F67491AIPEU is usually 5 days.
3.What payment methods are accepted for MSP430F67491AIPEU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F67491AIPEU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F67491AIPEU?
MSP430F67491AIPEU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F67491AIPEU 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 MSP430F67491AIPEU?
For technical support, including MSP430F67491AIPEU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F67491AIPEU requirements.
6.How does Aetrix verify that MSP430F67491AIPEU is sourced from the original manufacturer or authorized distributors?
All MSP430F67491AIPEU 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 MSP430F67491AIPEU meets industry standards.
7.What is the process for return or replacement of MSP430F67491AIPEU?
All MSP430F67491AIPEU units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F67491AIPEU, 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 MSP430F67491AIPEU part is unused and in its original packaging.
Return procedure for MSP430F67491AIPEU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430F67491AIPEU 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…
