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Texas Instruments MSP430FE425AIPM
- Part No.:
- MSP430FE425AIPM
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430FE425AIPM.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,901
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Product details
Overview
MSP430FE425AIPM from Texas Instruments is a mixed-signal microcontroller optimized for single-phase energy metering, featuring 16KB+256B flash, 512B RAM, integrated 16-bit sigma-delta ADCs (SD16), embedded signal processor ESP430CE1A, 128-segment LCD driver, and ultra-low-power operation (400 μA active @ 1 MHz, 0.1 μA off mode). It targets tamper-resistant utility meters with 2-wire/3-wire configurations.
For engineers reviewing the MSP430FE425AIPM datasheet, MSP430FE425AIPM pinout, MSP430FE425AIPM application, or MSP430FE425AIPM equivalent, key selection criteria include its dedicated energy-metering AFE, on-chip ESP430CE1A signal processing core, 64-pin QFP package with analog input pairs (I1±, I2±, V1±), and support for UART/SPI via USART0 - all validated for meter-grade accuracy and low-power longevity.
Technical Context
The MSP430FE425AIPM implements a 16-bit RISC CPU with constant generators and five software-selectable low-power modes (LPM0–LPM4), enabling sub-6 μs wake-up from standby. Its FLL+ clock system locks DCO to a 32.768 kHz crystal, generating stable MCLK, SMCLK, and ACLK for synchronized analog and digital operation.
It integrates three independent 16-bit sigma-delta ADCs feeding the ESP430CE1A module - a hardware-accelerated signal processor that autonomously computes real/reactive power, energy, and power factor for single-phase metering without CPU intervention. The SD16 converters accept differential inputs (I1±, I2±, V1±) with programmable gain and offset calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 16 KB + 256 B information memory - sufficient for full meter firmware, calibration tables, and secure boot loader. |
| RAM | 512 B - supports real-time ESP430CE1A result buffering and CPU stack for interrupt-driven metering tasks. |
| ADC Resolution | 16-bit sigma-delta (SD16) - delivers >90 dB SNR for high-accuracy current/voltage sampling in Class 0.5/1.0 meters. |
| Power Consumption | 0.1 μA in off mode with RAM retention - enables decade-scale battery life in non-volatile meter designs. |
| LCD Drive | 128 segments with 4-MUX support - drives full-feature numeric + symbol displays without external drivers. |
| Operating Voltage | 2.7 V to 3.6 V - compatible with standard 3 V coin cells and regulated industrial supplies. |
| Wake-up Time | <6 μs from LPM3/LPM4 - ensures rapid response to tamper events or pulse interrupts while preserving energy budget. |
Pinout & Package
Package: 64-pin plastic quad flat pack (QFP), surface-mount, 10 mm × 10 mm body, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I1+, I1− | Differential current input pair | Direct connection to shunt resistor or current transformer secondary for phase current measurement. |
| I2+, I2− | Differential current input pair | Supports 3-wire metering or neutral current monitoring; internally routed to SD16 Channel 1. |
| V1+, V1− | Differential voltage input pair | Connects to voltage divider for line-to-neutral or line-to-line voltage sensing; feeds SD16 Channel 2. |
| P1.0/TA0, P1.1/TA0/MCLK | Timer_A capture/compare & MCLK output | Enables precise time-stamping of zero-crossings and generation of synchronous clock signals for external peripherals. |
| P2.4/UTXD0, P2.5/URXD0 | UART transmit/receive | Provides isolated RS-485 or optical interface for AMR/AMI communication without external level shifters. |
| S0–S31, COM0–COM3 | LCD segment/common outputs | Drives up to 128 segments in static or 2/3/4-MUX configuration; eliminates need for external LCD controller IC. |
| RST/NMI | Reset/non-maskable interrupt | Hardware reset initiation and tamper-detection input (e.g., case-open switch) with glitch filtering. |
| TCK, TMS, TDI, TDO | JTAG debug/test interface | Enables in-circuit programming, boundary scan, and real-time debugging during meter development and field calibration. |
Key Features
| Feature | Design Value |
|---|---|
| ESP430CE1A Embedded Signal Processor | Hardware-accelerated computation of kWh, kVArh, power factor, and RMS values - reduces CPU load by >95% vs. software-only implementations. |
| Three Independent SD16 ADCs | Simultaneous sampling of current and voltage channels with matched gain/offset calibration - eliminates inter-channel timing skew in energy calculations. |
| Integrated LCD Driver (128 seg) | On-chip bias generation and multiplex control - cuts BOM cost and PCB area by removing external LCD driver IC and charge pump. |
| FLL+ Frequency-Locked Loop | Automatic DCO stabilization to 32.768 kHz crystal - ensures accurate timekeeping and metrology-grade sampling clocks without external PLL components. |
| Bootstrap Loader (BSL) | UART-based flash programming with password protection - enables field firmware updates without JTAG hardware or external programmers. |
Applications
| Smart Electricity Meter | Tamper-Resistant Utility Meter |
|---|---|
Use Scenario: Residential or commercial single-phase electricity meter with remote readout and tariff switching. IC Role / Device Role / Timing Role: Primary metrology controller executing ESP430CE1A energy calculations, driving LCD display, and managing UART-based HAN communication. Use Value: Eliminates external DSP and ADCs; achieves Class 0.5 accuracy with <1 mW active power consumption per channel. |
Use Scenario: Meters deployed in high-theft-risk areas requiring magnetic, cover-removal, and reverse-connection detection. IC Role / Device Role / Timing Role: Real-time sensor fusion hub - monitors I1±/I2± polarity, detects SVS threshold violations, and triggers immediate EEPROM logging on tamper event. Use Value: On-chip brownout detector and SVS monitor enable autonomous tamper response within 10 μs, meeting IEC 62053-31 requirements. |
| Prepayment Energy Meter | Industrial Sub-Metering Module |
Use Scenario: Pay-as-you-go meter with keypad input, credit validation, and local display feedback. IC Role / Device Role / Timing Role: System-on-chip handling keypad scanning, LCD update, secure BSL firmware updates, and AES-encrypted credit validation via internal ROM routines. Use Value: Integrated 16KB flash stores encrypted credit algorithms and usage history; 512B RAM buffers transaction logs across power cycles. |
Use Scenario: DIN-rail mounted panel meter monitoring HVAC, lighting, or machinery energy use in factories. IC Role / Device Role / Timing Role: Standalone data logger - samples voltage/current at 2 kHz, computes 1-second energy integrals, and transmits via SPI to host MCU over RS-485. Use Value: USART0 SPI mode interfaces directly with isolated transceivers; 128-segment LCD shows real-time kW, kWh, and demand peaks without GUI overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar energy metering microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FE427AIPM | 32 KB flash, 1 KB RAM, same peripherals and pinout - adds headroom for advanced tariff logic and firmware encryption. | Required for meters needing >16 KB code space (e.g., DLMS/COSEM protocol stacks or multi-tariff billing). | Select when future firmware expansion or regulatory compliance (e.g., MID certification) demands larger memory. |
| MSP430F6736AIPZ | 64-pin QFN, 32 KB flash, 4 KB RAM, enhanced SD24 ADC (24-bit), integrated temperature sensor, and hardware AES accelerator. | Supports higher-accuracy Class 0.2 meters and secure firmware updates - not pin-compatible with MSP430FE425AIPM. | Choose for next-generation meters requiring cryptographic security or extended dynamic range beyond 16-bit SD16. |
Compared with MSP430FE425AIPM, MSP430FE427AIPM offers scalable memory without layout change, while MSP430F6736AIPZ delivers superior metrology precision and security at the cost of redesign - making MSP430FE425AIPM optimal for cost-sensitive, production-ready Class 0.5 meters.
Availability
MSP430FE425AIPM is available at Aetrix Electronics and suitable for smart electricity meters, tamper-resistant utility meters, prepayment energy meters, and industrial sub-metering modules requiring stable component supply across multi-year production cycles.
Supply support for MSP430FE425AIPM 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 connectivity technologies, with decades of expertise in ultra-low-power design and metrology-grade signal chains.
The MSP430FE42xA product line was engineered specifically for single-phase energy metering - integrating sigma-delta ADCs, ESP signal processing, LCD drivers, and low-power timers into one die to reduce system cost and certification complexity.
FAQ
What is the primary function of the ESP430CE1A module in the MSP430FE425AIPM?
The ESP430CE1A module in the MSP430FE425AIPM is a dedicated hardware signal processor that autonomously computes real energy (kWh), reactive energy (kVArh), apparent power, RMS current/voltage, and power factor from raw SD16 ADC samples. It operates independently of the CPU, reducing firmware complexity and ensuring deterministic metrology performance without software timing jitter.
Does the MSP430FE425AIPM support UART and SPI communication simultaneously?
No - the MSP430FE425AIPM features a single USART0 peripheral that supports either asynchronous UART or synchronous SPI mode, selected by software configuration. It cannot operate both protocols concurrently; switching requires reinitializing the USART control registers and adjusting pin functions via P1SEL/P2SEL bits.
How many analog input channels does the MSP430FE425AIPM support for energy metering?
The MSP430FE425AIPM supports three differential analog input channels via its integrated SD16 sigma-delta ADCs: I1± for phase current, I2± for neutral or second current, and V1± for line voltage. Each channel maps to a dedicated SD16 converter with independent gain, offset, and filter settings - confirmed in the SLAS588 functional block diagram and terminal functions table.
What is the maximum LCD segment count supported by the MSP430FE425AIPM?
The MSP430FE425AIPM supports up to 128 LCD segments using its integrated driver, configurable for static, 2-MUX, 3-MUX, or 4-MUX operation. This is implemented through dedicated S0–S31 and COM0–COM3 pins plus internal LCD memory (LCDM1–LCDM20), eliminating external driver ICs - as specified in the "LCD drive" section of SLAS588, page 12.
Is the MSP430FE425AIPM pin-compatible with other devices in the MSP430FE42xA family?
Yes - the MSP430FE425AIPM shares identical 64-pin QFP packaging, pin assignments, and electrical characteristics with MSP430FE423AIPM and MSP430FE427AIPM. All three devices use the same PM package designation and have identical terminal functions (e.g., I1±, V1±, S0–S31), enabling direct hardware substitution based on flash/RAM requirements without PCB revision.
MSP430FE425AIPM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x4xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8.4MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LCD, POR, PWM, WDT
- Number of I/O:
- 14
- Program Memory Size:
- 16KB (16K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 3x16b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FE425AIPM FAQ
1.How can I place an order for MSP430FE425AIPM through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FE425AIPM 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 MSP430FE425AIPM reliable?
The price and inventory of MSP430FE425AIPM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FE425AIPM is usually 5 days.
3.What payment methods are accepted for MSP430FE425AIPM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FE425AIPM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FE425AIPM?
MSP430FE425AIPM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FE425AIPM 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 MSP430FE425AIPM?
For technical support, including MSP430FE425AIPM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FE425AIPM requirements.
6.How does Aetrix verify that MSP430FE425AIPM is sourced from the original manufacturer or authorized distributors?
All MSP430FE425AIPM 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 MSP430FE425AIPM meets industry standards.
7.What is the process for return or replacement of MSP430FE425AIPM?
All MSP430FE425AIPM units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FE425AIPM, 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 MSP430FE425AIPM part is unused and in its original packaging.
Return procedure for MSP430FE425AIPM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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