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Texas Instruments MSP430FE4252IPM
- Part No.:
- MSP430FE4252IPM
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430FE4252IPM.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
MSP430FE4252IPM from Texas Instruments is a mixed-signal microcontroller optimized for single-phase energy metering, featuring 16KB Flash + 256B information memory, 512B RAM, dual 16-bit sigma-delta ADCs (SD16), and integrated ESP430CE1B signal processor core. It operates from 2.7 V to 3.6 V, achieves ultra-low-power active mode (400 µA at 1 MHz, 3.0 V), and supports 128-segment LCD drive - deployed in utility-grade 2-wire/3-wire residential electricity meters.
For engineers reviewing the MSP430FE4252IPM datasheet, MSP430FE4252IPM pinout, MSP430FE4252IPM application, or MSP430FE4252IPM equivalent, key selection criteria include its embedded energy metering accelerator (ESP430CE1B), calibrated 2-/3-wire metrology capability, 64-pin QFP package with dedicated analog front-end pins (I1±, V1±), and hardware support for ANSI C12.20 / IEC 62053-21 compliance.
Technical Context
The MSP430FE4252IPM implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register instructions in one cycle. Its FLL+ clock system locks DCO to a 32.768 kHz crystal, enabling sub-6 µs wake-up from LPM4 and stable MCLK generation up to 8 MHz.
It integrates two independent SD16 converters with programmable gain and offset calibration, directly feeding the ESP430CE1B engine - which performs real-time active/reactive energy calculation, power factor, and RMS voltage/current without CPU intervention. The module uses mailbox registers (MBIN0/MBOUT0) for CPU-ESP430 data exchange and requires explicit suspension of ESP430 to access SD16 control registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 16 KB main + 256 B information memory; supports in-system programming via JTAG or UART BSL with password protection. |
| RAM | 512 B; retains data in Off mode (0.1 µA) for metering state persistence during power interruption. |
| Analog Front-End | Dual 16-bit sigma-delta ADCs (SD16) with internal reference; inputs I1± and V1± mapped to dedicated pins for current/voltage sensing in 2-/3-wire meter topologies. |
| Energy Processing Core | ESP430CE1B hardware accelerator computes Wh, VARh, PF, and RMS values autonomously; outputs via 32 mailbox registers (RET0–RET31). |
| LCD Driver | Supports static, 2-/3-/4-MUX displays up to 128 segments; COM0–COM3 and S0–S31 pins enable direct drive of segmented meter displays without external bias circuitry. |
| Power Modes | Five low-power modes including LPM4 (0.1 µA); wake-up from standby in <6 µs enables rapid response to tamper or event triggers. |
| Operating Voltage | 2.7 V to 3.6 V; brownout detector with programmable threshold ensures reliable reset during grid sags common in distribution networks. |
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− | Analog current input pair | Direct connection to shunt resistor or current transformer secondary; routed to SD16 Channel 0 for high-accuracy current measurement. |
| V1+, V1− | Analog voltage input pair | Connects to voltage divider network; feeds SD16 Channel 1 for line voltage sampling in single-phase configurations. |
| COM0–COM3 | LCD common outputs | Drive backplane electrodes for 4-MUX LCDs; eliminates need for external LCD bias generator in meter display subsystems. |
| S0–S31 | LCD segment outputs | Provide up to 32 segment drivers; combined with COM lines, enable full 128-segment display coverage for kWh, tariff, and status indicators. |
| P1.0/TA0, P1.1/TA0/MCLK | BSL serial interface | Pin 53 (TX) and Pin 52 (RX) implement UART-based bootloader; allows field firmware updates without JTAG hardware. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded ESP430CE1B | Hardware-accelerated single-phase metrology engine that computes active/reactive energy, power factor, and RMS values without CPU load - reducing firmware complexity and improving certification repeatability. |
| Dual SD16 Sigma-Delta ADCs | 16-bit resolution with programmable gain (1×–32×), offset calibration, and built-in reference; enables ±0.1% accuracy over temperature for ANSI C12.20 Class 0.2 metering. |
| Integrated LCD Controller | Drives 128 segments with 4-MUX support using only on-chip resources; eliminates external LCD driver IC and reduces BOM count in cost-sensitive meter designs. |
| FLL+ Clock System | Digitally locked oscillator stabilizes MCLK to crystal reference in <6 µs; ensures timing-critical metrology calculations remain synchronized across supply variations and temperature drift. |
| Ultra-Low-Power Operation | 0.1 µA Off mode with RAM retention enables battery-backed operation for >10 years in AMI endpoint applications where mains power may be intermittent. |
Applications
| Residential Electricity Meter | Prepayment Energy Meter |
|---|---|
Use Scenario: Utility-deployed 2-wire or 3-wire kWh meter measuring consumption in homes and small businesses. IC Role / Device Role / Timing Role: Primary metrology controller executing ANSI C12.20-compliant energy accumulation, tamper detection, and LCD display update at 1-second intervals. Use Value: ESP430CE1B delivers certified Class 0.2 accuracy without software compensation routines, reducing firmware validation effort and time-to-certification. | Use Scenario: Pay-as-you-go meter requiring secure credit management, local display of remaining balance, and low-power sleep between transactions. IC Role / Device Role / Timing Role: Host MCU managing keypad input, EEPROM-based credit storage, LCD refresh, and secure BSL firmware updates via optical port. Use Value: 512B RAM with 0.1 µA Off mode preserves credit state during power loss; integrated LCD driver eliminates external display controller. |
| Industrial Sub-Metering Node | Smart Grid Endpoint with Tamper Detection |
Use Scenario: Panel-level monitoring of HVAC, lighting, or machinery loads in commercial buildings. IC Role / Device Role / Timing Role: Standalone metering node performing real-time RMS current/voltage logging and harmonic analysis at 1-kHz sampling rate. Use Value: Dual SD16 ADCs sample I/V simultaneously with matched gain/offset paths, ensuring phase alignment critical for accurate power calculation. | Use Scenario: Meters detecting magnetic, cover-removal, or neutral-disconnect tampering events in distribution networks. IC Role / Device Role / Timing Role: Real-time sensor fusion hub correlating current imbalance, temperature drift (via on-die sensor), and supply voltage anomalies. Use Value: SVS with programmable threshold and P2.3/SVSIN analog monitor pin enable custom tamper thresholds aligned to regional grid specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase energy metering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FE4272IPM | 32 KB Flash + 1 KB RAM; identical peripheral set and ESP430CE1B core; same 64-pin QFP package. | Supports larger firmware for multi-tariff billing, DLMS/COSEM protocol stack, or extended diagnostics - not required for basic Class 0.2 metering. | Select when future firmware expansion or protocol certification (e.g., DLMS) is anticipated; no PCB change needed. |
| STM32G071KBT6 | ARM Cortex-M0+, 128 KB Flash, 36 KB RAM; no integrated metrology accelerator; requires external ADCs and software-based energy calculation. | Higher general-purpose compute headroom for IoT connectivity (BLE/Wi-Fi coexistence), but lacks hardware-certified metrology path. | Choose for hybrid smart-meter designs needing rich UI, cloud upload, or edge analytics - accept added firmware validation burden. |
Compared with MSP430FE4272IPM, the MSP430FE4252IPM offers optimal cost/performance for certified Class 0.2 meters with fixed feature sets; versus STM32G071KBT6, it delivers lower system-level BOM cost and faster regulatory approval due to pre-validated hardware metrology engine.
Availability
MSP430FE4252IPM is available at Aetrix Electronics and suitable for residential metering, prepayment systems, and industrial sub-metering requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for utility-grade deployments.
Supply support for MSP430FE4252IPM 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 digital signal processing technologies with over 50 years of innovation in precision measurement and low-power design.
The MSP430FE42x2 product line was engineered specifically for cost-sensitive, battery-backed, and mains-powered single-phase energy meters - integrating metrology-grade analog front-ends, LCD drivers, and ultra-low-power operation into a single chip.
FAQ
What is the primary metrology function enabled by the ESP430CE1B core in the MSP430FE4252IPM?
The ESP430CE1B core in the MSP430FE4252IPM performs autonomous single-phase energy calculations including active energy (Wh), reactive energy (VARh), power factor, and RMS voltage/current - using inputs from its dual SD16 ADCs. It outputs results via 32 mailbox registers (RET0–RET31), eliminating CPU involvement in real-time metrology and enabling ANSI C12.20 Class 0.2 accuracy without software compensation. This hardware acceleration is exclusive to the MSP430FE42x2 family and is central to the MSP430FE4252IPM's role in certified electricity meters.
Does the MSP430FE4252IPM support both 2-wire and 3-wire single-phase metering configurations?
Yes, the MSP430FE4252IPM supports both 2-wire and 3-wire single-phase metering configurations through its dedicated analog input structure: I1± and V1± pins connect directly to current shunts or CTs and voltage dividers, while the ESP430CE1B core includes configurable firmware libraries validated for both topologies. The device's dual SD16 ADCs provide simultaneous sampling and matched gain/offset paths essential for phase-aligned measurements in either configuration - a requirement explicitly stated in the SLAS616 datasheet for the MSP430FE4252IPM.
How does the MSP430FE4252IPM achieve ultra-low-power operation in metering applications?
The MSP430FE4252IPM achieves ultra-low-power operation via five software-selectable low-power modes, including Off mode with RAM retention at 0.1 µA and wake-up from Standby in under 6 µs. Its FLL+ clock system stabilizes the DCO to a 32.768 kHz crystal without external components, and the ESP430CE1B core handles metrology autonomously - allowing the CPU to remain in LPM4 during measurement cycles. This architecture enables >10-year battery life in backup-powered meters and meets IEC 62053-21 standby current requirements - all confirmed in the MSP430FE4252IPM's SLAS616 specification table.
What LCD display capabilities does the MSP430FE4252IPM provide, and how are they implemented?
The MSP430FE4252IPM provides integrated LCD driving for up to 128 segments using static, 2-MUX, 3-MUX, or 4-MUX configurations. It dedicates pins S0–S31 and COM0–COM3 to segment and common outputs, with internal resistive divider circuitry powered by AVCC/AVSS. No external bias generator or driver IC is required - the LCDCTL register configures mux ratio and frame frequency, and LCD memory (LCDM1–LCDM20) stores segment states. This capability is fully documented in the MSP430FE4252IPM's functional block diagram and terminal functions table (SLAS616, pages 3 and 4).
Can the MSP430FE4252IPM be programmed in-system, and what interfaces are supported?
Yes, the MSP430FE4252IPM supports in-system programming via three interfaces: JTAG (using TCK/TMS/TDI/TDO pins), UART-based Bootstrap Loader (BSL) on P1.0/P1.1, and CPU-controlled flash writes. The BSL enables field firmware updates without debug hardware, protected by user-defined password; JTAG allows full debugging and production programming. All methods are specified in the MSP430FE4252IPM's memory organization and BSL sections (SLAS616, pages 11 and 12), and the device requires no external programming voltage - simplifying manufacturing and maintenance workflows.
MSP430FE4252IPM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x4xx
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- 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 2x16b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FE4252IPM FAQ
1.How can I place an order for MSP430FE4252IPM through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FE4252IPM 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 MSP430FE4252IPM reliable?
The price and inventory of MSP430FE4252IPM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FE4252IPM is usually 5 days.
3.What payment methods are accepted for MSP430FE4252IPM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FE4252IPM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FE4252IPM?
MSP430FE4252IPM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FE4252IPM 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 MSP430FE4252IPM?
For technical support, including MSP430FE4252IPM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FE4252IPM requirements.
6.How does Aetrix verify that MSP430FE4252IPM is sourced from the original manufacturer or authorized distributors?
All MSP430FE4252IPM 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 MSP430FE4252IPM meets industry standards.
7.What is the process for return or replacement of MSP430FE4252IPM?
All MSP430FE4252IPM units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FE4252IPM, 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 MSP430FE4252IPM part is unused and in its original packaging.
Return procedure for MSP430FE4252IPM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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