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Texas Instruments MSP430FE425AIPMR
- Part No.:
- MSP430FE425AIPMR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430FE425AIPMR.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430FE425AIPMR 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 electricity meters with 2-wire/3-wire configurations.
For engineers reviewing the MSP430FE425AIPMR datasheet, MSP430FE425AIPMR pinout, MSP430FE425AIPMR application, or MSP430FE425AIPMR equivalent, key selection criteria include its dedicated energy-metering analog front-end, FLL+-based clock system with sub-6-μs wake-up, 64-pin QFP package with 14 GPIOs, and hardware-accelerated ESP430CE1A engine for real-time watt-hour calculation.
Technical Context
The MSP430FE425AIPMR implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register operations in one cycle. Its FLL+ module locks the DCO to a 32.768-kHz crystal, generating MCLK (up to 8 MHz), SMCLK, and ACLK with programmable division.
Three independent 16-bit sigma-delta ADCs feed the ESP430CE1A core, which performs calibrated energy computation-including active/reactive power, RMS voltage/current, and power factor-without CPU intervention. The SD16 converters support differential inputs I1±, I2±, V1±, with internal reference and programmable gain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 16 KB + 256 B information memory: sufficient for full metering firmware, calibration tables, and secure bootloader. |
| RAM | 512 B: supports dual-buffered UART/SPI, ESP430 mailbox exchange, and real-time parameter storage during measurement cycles. |
| ADC Resolution | 16-bit sigma-delta (SD16): enables >90 dB SNR for accurate current/voltage sampling in noisy meter environments. |
| Operating Voltage | 2.7 V to 3.6 V: compatible with standard 3.3 V meter power rails and brownout-safe down to 2.7 V. |
| Wake-up Time | <6 μs from LPM4: allows rapid response to tamper events or tariff-change interrupts without missing critical samples. |
| LCD Drive | 128 segments with 4-MUX support: drives full-feature numeric + symbol displays common in Class 0.5S utility meters. |
| Timer Resources | Timer_A3 with three capture/compare registers: provides precise time-stamping for pulse output (e.g., kWh LED) and metrology timing control. |
Pinout & Package
Package: 64-pin plastic quad flat pack (QFP), surface-mount, 10 mm × 10 mm body, 0.5 mm pitch - suitable for automated assembly in meter PCBs requiring thermal and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I1+, I1− | Differential current input channel 0 | Direct connection to shunt or current transformer secondary; routed to SD16 Channel 0 for high-accuracy energy integration. |
| I2+, I2− | Differential current input channel 1 | Supports 3-wire meter topologies (e.g., split-phase) with independent current sensing per leg. |
| V1+, V1− | Differential voltage input channel 2 | Connects to voltage divider network for line-voltage sampling; referenced to AVSS for noise immunity. |
| S0–S31, S24–S28 | LCD segment outputs | Drive up to 128 segments across 4 backplane commons (COM0–COM3); eliminates need for external LCD drivers. |
| P1.0/TA0, P1.1/TA0/MCLK | BSL UART interface | Enables field firmware updates via P1.0 (TXD) and P1.1 (RXD) without external programming hardware. |
| RST/NMI | Reset/non-maskable interrupt | Hardware reset initiation and tamper detection input (e.g., case-open switch) with glitch filtering. |
| XIN/XOUT | 32.768 kHz crystal oscillator terminals | Provides stable timebase for metrology timestamping, calendar functions, and FLL+ frequency synthesis. |
Key Features
| Feature | Design Value |
|---|---|
| ESP430CE1A embedded signal processor | Hardware-accelerated single-phase energy computation engine that outputs calibrated Wh, VARh, PF, and RMS values directly to CPU memory-reducing firmware complexity and CPU load by >70% vs. software-only solutions. |
| FLL+ frequency-locked loop | Stabilizes DCO to crystal reference in <6 μs, enabling immediate transition from LPM4 to active mode for event-triggered measurements without clock warm-up delay. |
| Integrated 128-segment LCD controller | On-chip drive capability eliminates external LCD bias generator and segment drivers, reducing BOM count and layout area in space-constrained meter modules. |
| Ultra-low-power standby mode | 1.6 μA consumption with ACLK active allows continuous real-time clock operation and periodic wake-up for background diagnostics while preserving battery life in backup-powered meters. |
| Programmable supply voltage supervisor (SVS) | User-configurable trip point (e.g., 2.5 V) triggers automatic reset or flag-only alert-ensuring reliable operation during brownout conditions common in grid-edge deployments. |
Applications
| Smart Electricity Meter | Tamper-Resistant Energy Monitor |
|---|---|
Use Scenario: Utility-grade residential/commercial meter measuring active energy (kWh), reactive energy (kVARh), and power factor in 2-wire or 3-wire configurations under IEC 62053-21/22 compliance. IC Role / Device Role / Timing Role: Primary metrology controller executing calibrated energy calculations via ESP430CE1A, driving LCD display, and communicating via UART/SPI to PLC or RF module. Use Value: Eliminates need for external DSP or separate ADCs; achieves Class 0.5S accuracy with on-chip sigma-delta converters and hardware-based compensation. |
Use Scenario: Industrial submeter detecting physical tampering (e.g., magnet, neutral short, reverse polarity) using real-time current/voltage phase analysis and SVS-triggered logging. IC Role / Device Role / Timing Role: Real-time anomaly detector with sub-6-μs wake-up from LPM4, capturing pre-event waveform snapshots using SD16 buffers and storing evidence in flash. Use Value: On-chip ESP430CE1A computes phase angle deviation and harmonic distortion in hardware-enabling tamper classification without CPU intervention or latency. |
| Prepaid Meter Interface Module | Energy Data Logger |
Use Scenario: Embedded module in pay-as-you-go meters validating credit tokens via secure BSL password-protected flash writes and updating LCD with remaining balance and tariff tiers. IC Role / Device Role / Timing Role: Secure firmware execution host with programmable code protection fuse, 16KB flash for encrypted token validation logic, and LCD segment driver for user-facing display. Use Value: Integrated BSL enables field-upgradable security algorithms without JTAG; flash write protection prevents unauthorized token injection or balance manipulation. |
Use Scenario: Battery-powered portable logger recording voltage, current, and energy consumption every 15 minutes for demand-side management audits over 30+ days. IC Role / Device Role / Timing Role: Low-power data acquisition node using LPM3 (ACLK only) with Timer_A3 wake-up, SD16 sampling, and SPI transmission to external flash memory. Use Value: 0.1 μA off-mode retention extends CR2032 battery life beyond 1 year; integrated LCD allows local readout without external display controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar energy metering microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FE427AIPMR | 32 KB flash, 1 KB RAM, same peripherals and pinout | Supports larger firmware (e.g., DLMS/COSEM stack, multi-tariff billing, extended diagnostics) | Select when future firmware expansion or advanced communication protocol implementation is required. |
| MSP430F4250IPMR | No ESP430CE1A; only one SD16 ADC; 8 KB flash, 256 B RAM | Lacks hardware energy computation-requires CPU-intensive software metrology, limiting accuracy and increasing power use | Choose only for cost-sensitive, non-certified metering where Class 1.0 accuracy suffices and firmware size is constrained. |
Compared with MSP430FE425AIPMR, the MSP430FE427AIPMR offers headroom for feature-rich firmware but shares identical metrology performance and pin compatibility, whereas the MSP430F4250IPMR sacrifices hardware acceleration and dual-current sensing-requiring significant CPU overhead and compromising low-power accuracy in certified meter designs.
Availability
MSP430FE425AIPMR is available at Aetrix Electronics and suitable for smart electricity meters, tamper-resistant energy monitors, prepaid meter interface modules, and battery-powered energy data loggers requiring stable component supply across multi-year production cycles.
Supply support for MSP430FE425AIPMR 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 precision metrology and ultra-low-power design.
The MSP430FE42xA product line was engineered specifically for ANSI C12 and IEC 62053-compliant single-phase energy metering, integrating analog front-end, signal processing, and display control into a single low-power SoC.
FAQ
What is the primary function of the ESP430CE1A module inside the MSP430FE425AIPMR?
The ESP430CE1A module in the MSP430FE425AIPMR is a dedicated hardware signal processor that performs real-time, calibrated single-phase energy calculations-including active/reactive energy (Wh/kVARh), RMS voltage/current, power factor, and frequency-using inputs from its three 16-bit sigma-delta ADCs. It operates autonomously, freeing the CPU for communications and UI tasks while maintaining metrology accuracy per IEC 62053 standards.
Does the MSP430FE425AIPMR support both 2-wire and 3-wire single-phase metering topologies?
Yes, the MSP430FE425AIPMR supports both 2-wire and 3-wire single-phase metering configurations. Its dual differential current inputs (I1±, I2±) and dedicated voltage input (V1±) enable direct connection to shunts or current transformers in either topology. The ESP430CE1A firmware is configurable to compute energy correctly for both arrangements, including neutral-current compensation in 3-wire systems.
What are the key power modes and their typical current consumption for the MSP430FE425AIPMR?
The MSP430FE425AIPMR features six operating modes: Active mode draws 400 μA at 1 MHz/3.0 V; LPM0–LPM3 range from 1.6 μA to 0.3 μA with varying clocks enabled; and LPM4 consumes just 0.1 μA with RAM retention. These modes are software-selectable and allow precise trade-offs between responsiveness and battery life-critical for backup-powered meters needing >10-year shelf life.
Can the MSP430FE425AIPMR drive a 128-segment LCD without external components?
Yes, the MSP430FE425AIPMR integrates a full 128-segment LCD controller supporting static, 2-MUX, 3-MUX, and 4-MUX displays. It provides all necessary bias voltages (via R03/R13/R23/R33 pins) and segment/common timing-eliminating external LCD drivers, resistive dividers, or charge pumps. This reduces bill-of-materials cost and PCB area in compact meter designs.
How is firmware updated in the MSP430FE425AIPMR in the field?
Firmware updates for the MSP430FE425AIPMR are performed via its built-in bootstrap loader (BSL), accessible through UART using P1.0 (TXD) and P1.1 (RXD) pins. The BSL supports password-protected flash programming, enabling secure field upgrades without JTAG hardware. Code protection fuses prevent unauthorized access, and the process requires no external programming voltage-only a 3.3 V supply and serial interface.
MSP430FE425AIPMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x4xx
- Packaging:
- Tape & Reel (TR)
- 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:
MSP430FE425AIPMR FAQ
1.How can I place an order for MSP430FE425AIPMR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FE425AIPMR 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 MSP430FE425AIPMR reliable?
The price and inventory of MSP430FE425AIPMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FE425AIPMR is usually 5 days.
3.What payment methods are accepted for MSP430FE425AIPMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FE425AIPMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FE425AIPMR?
MSP430FE425AIPMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FE425AIPMR 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 MSP430FE425AIPMR?
For technical support, including MSP430FE425AIPMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FE425AIPMR requirements.
6.How does Aetrix verify that MSP430FE425AIPMR is sourced from the original manufacturer or authorized distributors?
All MSP430FE425AIPMR 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 MSP430FE425AIPMR meets industry standards.
7.What is the process for return or replacement of MSP430FE425AIPMR?
All MSP430FE425AIPMR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FE425AIPMR, 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 MSP430FE425AIPMR part is unused and in its original packaging.
Return procedure for MSP430FE425AIPMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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