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Texas Instruments MSP430AFE253IPW
- Part No.:
- MSP430AFE253IPW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430AFE253IPW.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,565
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Product details
Overview
MSP430AFE253IPW from Texas Instruments is an ultra-low-power mixed-signal microcontroller integrating three independent 24-bit sigma-delta ADCs, a 16-bit RISC CPU, 16 KB flash, 512 B RAM, and USART with UART/SPI support. It operates from 1.8 V to 3.6 V, achieves active-mode current of 220 µA at 1 MHz/2.2 V, and supports single-phase electricity metering with differential PGA inputs and built-in voltage reference.
For engineers reviewing the MSP430AFE253IPW datasheet, MSP430AFE253IPW pinout, MSP430AFE253IPW application, or MSP430AFE253IPW equivalent, key selection criteria include 24-bit ADC resolution per channel, TSSOP-24 package compatibility, ultra-low standby current (0.5 µA), and integrated SD24_A module with external reference input capability.
Technical Context
The MSP430AFE253IPW implements a 16-bit RISC CPU with constant generators and digitally controlled oscillator (DCO), enabling sub-1 µs wake-up from LPM3/LPM4. Its SD24_A module provides three independent 24-bit sigma-delta converters with differential PGA inputs, programmable gain, and internal/external reference support.
It features a unified clock system with HF crystal (up to 16 MHz), DCO (up to 12 MHz), and VLO (12 kHz), plus Timer_A3 with three capture/compare registers, hardware multiplier, and Spy-Bi-Wire debug interface - all optimized for metrology-grade analog front-end control in battery-powered measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generators for high code efficiency in embedded metrology firmware |
| ADC Resolution | Three independent 24-bit sigma-delta ADCs (SD24_A) with differential PGA inputs for precision energy measurement |
| Memory | 16 KB flash (in-system programmable) and 512 B RAM - sufficient for full metering firmware including calibration tables and communication stacks |
| Supply Range | 1.8 V to 3.6 V operation - compatible with standard lithium coin cells and regulated 3.3 V rails in utility meter designs |
| Active Current | 220 µA at 1 MHz / 2.2 V - enables >10-year battery life in intermittent-read metering applications |
| Low-Power Modes | Five power-saving modes including LPM4 (0.1 µA RAM retention) - critical for long-term unattended deployment |
| Package | TSSOP-24 (7.8 mm × 4.4 mm) - surface-mount compatible with automated assembly and space-constrained meter PCBs |
Pinout & Package
TSSOP-24 package (7.8 mm × 4.4 mm) with exposed pad not specified; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+/A0.0− | Differential analog input pair for SD24_A channel 0 | Accepts ±2.5 V differential signals with PGA gain up to 32× - directly interfaces shunt resistors or current transformers |
| A1.0+/A1.0− | Differential analog input pair for SD24_A channel 1 | Independent 24-bit conversion path for voltage sensing or second current channel in polyphase metering |
| A2.0+/A2.0− | Differential analog input pair for SD24_A channel 2 | Third dedicated metrology channel - enables simultaneous voltage, current, and auxiliary sensor acquisition |
| VREF | Reference voltage terminal | Accepts external 2.5 V reference or outputs internal 1.2 V bandgap - ensures stable ADC full-scale across temperature and supply variation |
| P1.3/UTXD0/SD1DO | Multi-function I/O | UART transmit output or SD24_A bitstream data output for channel 1 - enables direct digital interface to external DSP or isolation ICs |
| RST/NMI/SBWTDIO | Reset/nonmaskable interrupt/test I/O | Single-pin JTAG/Spy-Bi-Wire interface for in-circuit programming and debug - eliminates need for dedicated debug header |
Key Features
| Feature | Design Value |
|---|---|
| Triple 24-bit SD24_A ADCs | Enables simultaneous high-resolution acquisition of voltage, current, and auxiliary parameters without multiplexing-induced phase error |
| Integrated PGA per ADC channel | Programmable gain (1×–32×) allows direct connection to low-level shunt or CT outputs without external amplification |
| On-chip 1.2 V bandgap reference | Stable internal reference reduces BOM count and improves long-term drift performance versus external references |
| Ultra-fast LPM3→AM wake-up (<1 µs) | Supports burst-sampling architectures where MCU sleeps between precise time-triggered ADC conversions |
| Hardware multiplier (16×16) | Accelerates real-time RMS, harmonic, and energy calculations - avoids software emulation latency and flash overhead |
Applications
| Single-Phase Electricity Metering | Digital Power Monitoring |
|---|---|
Use Scenario: Residential or commercial kWh meter measuring active/reactive energy using shunt-based current sensing and resistor-divider voltage sensing. IC Role / Device Role / Timing Role: Primary metrology controller executing ADC sampling, RMS/harmonic calculation, tariff computation, and optical/RS-485 communication. Use Value: Triple 24-bit SD24_A channels enable concurrent voltage, current, and neutral current sampling - eliminating time skew and supporting Class 0.5 accuracy per IEC 62053-21. | Use Scenario: Industrial panel-mounted power quality monitor tracking voltage sags, harmonics, and THD over time. IC Role / Device Role / Timing Role: Real-time signal processor capturing synchronized waveforms and computing IEEE 1459-compliant metrics. Use Value: Hardware multiplier and 12-MHz DCO allow 16-sample-per-cycle processing at 60 Hz - meeting Class A PQ analyzer timing requirements per IEC 61000-4-30 Ed.3. |
| Sensor Signal Conditioning | Portable Energy Audit Tool |
Use Scenario: Battery-powered thermal or pressure sensor node requiring high-precision analog front-end and low quiescent power. IC Role / Device Role / Timing Role: Analog-to-digital converter and system manager - digitizing sensor outputs and managing sleep/wake cycles. Use Value: 0.1 µA LPM4 current and internal VLO enable multi-year operation on CR2032; SD24_A's built-in temperature sensor supports self-calibration. | Use Scenario: Handheld device for field technicians to measure load profiles, demand peaks, and power factor across circuits. IC Role / Device Role / Timing Role: Embedded host processor running metering firmware and driving LCD/USB interface. Use Value: Integrated USART and 16 KB flash support dual-mode operation (UART for PC upload, SPI for display driver) without external peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430AFE252IPW | Identical package and core, but only two 24-bit SD24_A ADCs (no A2.0± pins) | Suitable for cost-sensitive single-channel metering where third ADC is unused | Select when design requires only two independent metrology channels and lower flash/RAM usage is acceptable |
| MSP430AFE233IPW | Same ADC count (3×24-bit) but reduced memory: 8 KB flash / 512 B RAM | Applicable where firmware footprint is under 8 KB and no future feature expansion is planned | Choose for legacy meter platforms with proven 8 KB firmware or constrained BOM cost targets |
Compared with MSP430AFE252IPW and MSP430AFE233IPW, the MSP430AFE253IPW provides maximum metrology flexibility via full 3-channel SD24_A support and largest memory headroom - essential for advanced features like waveform capture, DLMS/COSEM stack, or OTA updates.
Availability
MSP430AFE253IPW is available at Aetrix Electronics and suitable for single-phase electricity metering, digital power monitoring, and portable energy audit tools requiring stable component supply and long-term industrial lifecycle support.
Supply support for MSP430AFE253IPW 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 company specializing in analog, embedded processing, and connectivity technologies with leadership in low-power design and metrology solutions.
The MSP430AFE2xx product line is engineered specifically for high-accuracy energy measurement applications, integrating precision sigma-delta ADCs, low-drift references, and ultra-low-power operation to meet IEC 62053 and ANSI C12 standards.
FAQ
What is the maximum system clock frequency supported by the MSP430AFE253IPW?
The MSP430AFE253IPW supports a maximum MCLK frequency of 12 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. At lower supply voltages, the maximum frequency is reduced: 9 MHz at 2.7 V and 4.15 MHz at 1.8 V. This specification is defined in the Recommended Operating Conditions table of the SLAS701B datasheet and applies to CPU and peripheral clocking derived from MCLK.
Does the MSP430AFE253IPW include an internal voltage reference for the SD24_A ADCs?
Yes, the MSP430AFE253IPW includes an internal 1.2 V bandgap voltage reference usable by the SD24_A ADCs. The VREF pin can output this internal reference or accept an external 2.5 V reference. Internal reference operation eliminates external component count and improves long-term stability in temperature-varying environments typical of utility meter installations.
How many independent analog input channels does the MSP430AFE253IPW support?
The MSP430AFE253IPW supports three independent differential analog input channels via its SD24_A module: A0.0±, A1.0±, and A2.0±. Each channel has dedicated PGA, programmable gain (1×–32×), and 24-bit sigma-delta conversion - enabling true simultaneous sampling of voltage, current, and auxiliary signals without multiplexer-induced timing skew.
What debug interface does the MSP430AFE253IPW use, and how many pins are required?
The MSP430AFE253IPW uses the Spy-Bi-Wire (SBW) interface, which requires only two pins: TEST/SBWTCK (pin 10) and RST/NMI/SBWTDIO (pin 11). This 2-wire JTAG subset enables full in-system programming and real-time debugging while minimizing PCB footprint - critical for space-constrained meter designs where traditional 4-wire JTAG is impractical.
Is the MSP430AFE253IPW qualified for use in electricity metering applications compliant with IEC 62053?
Yes, the MSP430AFE253IPW is designed and characterized for electricity metering applications targeting IEC 62053-21 (Class 0.5/1.0) and ANSI C12.20 compliance. Its triple 24-bit SD24_A ADCs, low-drift internal reference, PGA linearity, and temperature-stable performance across –40°C to +85°C support the accuracy and reliability requirements of revenue-grade metering systems.
MSP430AFE253IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 12MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, PWM, WDT
- Number of I/O:
- 11
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 3x24b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430AFE253IPW FAQ
1.How can I place an order for MSP430AFE253IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430AFE253IPW 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 MSP430AFE253IPW reliable?
The price and inventory of MSP430AFE253IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430AFE253IPW is usually 5 days.
3.What payment methods are accepted for MSP430AFE253IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430AFE253IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430AFE253IPW?
MSP430AFE253IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430AFE253IPW 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 MSP430AFE253IPW?
For technical support, including MSP430AFE253IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430AFE253IPW requirements.
6.How does Aetrix verify that MSP430AFE253IPW is sourced from the original manufacturer or authorized distributors?
All MSP430AFE253IPW 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 MSP430AFE253IPW meets industry standards.
7.What is the process for return or replacement of MSP430AFE253IPW?
All MSP430AFE253IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430AFE253IPW, 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 MSP430AFE253IPW part is unused and in its original packaging.
Return procedure for MSP430AFE253IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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