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Texas Instruments MSP430AFE231IPWR
- Part No.:
- MSP430AFE231IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430AFE231IPWR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,801
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Product details
Overview
MSP430AFE231IPWR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller designed for precision analog sensing in metering applications. It integrates one 24-bit sigma-delta ADC with differential PGA inputs, 8 KB flash, 512 B RAM, a 16-bit Timer_A3, USART (UART/SPI), hardware multiplier, and operates from 1.8 V to 3.6 V. Its sub-1 µs wake-up and 0.1 µA LPM4 current enable battery-powered single-phase electricity meters.
For engineers reviewing the MSP430AFE231IPWR datasheet, MSP430AFE231IPWR pinout, MSP430AFE231IPWR application, or MSP430AFE231IPWR equivalent, key selection criteria include its single SD24_A converter configuration, TSSOP-24 package with 11 I/O pins, ultra-low active-mode current (350 µA at 1 MHz/3 V), and support for crystal oscillators up to 16 MHz - all critical for cost-optimized, high-accuracy energy measurement designs.
Technical Context
The MSP430AFE231IPWR implements a 16-bit RISC CPU with constant generators and digitally controlled oscillator (DCO), enabling efficient code execution and sub-1 µs transition from LPM3/LPM4 to active mode. Its SD24_A module supports programmable gain, internal reference, and temperature sensing - all calibrated for metrology-grade linearity and offset stability over temperature.
It features a unified clock system with HF crystal (XT2), DCO, and VLO sources, supporting independent ACLK/SMCLK/MCLK domains. The device uses Spy-Bi-Wire for programming and debugging, and includes brownout reset (BOR), supply voltage supervisor (SVS), and JTAG fuse protection - meeting functional safety requirements in utility-grade metering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generators for optimized code density and low-cycle-count sensor processing |
| ADC Resolution & Count | One 24-bit sigma-delta ADC (SD24_A) with differential PGA inputs - enables high-precision current/voltage measurement in single-phase meters |
| Memory | 8 KB flash (programmable in-system), 512 B RAM - sufficient for firmware, calibration tables, and real-time energy accumulation |
| Power Consumption | 0.1 µA in LPM4 (RAM retention), 350 µA active at 1 MHz/3 V - extends battery life beyond 10 years in AMI endpoints |
| Operating Voltage | 1.8 V to 3.6 V - compatible with coin-cell and regulated 3.3 V supplies without external LDO overhead |
| Package & I/O | TSSOP-24 (7.8 mm × 4.4 mm), 11 digital I/O pins with interrupt capability and configurable pullup/pulldown resistors |
| Clock Sources | Internal DCO (calibrated to ±1% at 1/8/12 MHz), VLO (12 kHz), external HF crystal up to 16 MHz - supports precise timekeeping and synchronous sampling |
Pinout & Package
TSSOP-24 (PW) package, 7.8 mm × 4.4 mm body size, lead pitch 0.65 mm, thermally enhanced for stable metrology performance in industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+/A0.0− | SD24_A analog input pair | Differential input channel for primary current/voltage sensing; supports PGA gain up to 32× for shunt-based measurements |
| AVCC/AVSS | Analog power supply rails | Isolated analog domain (2.5–3.6 V operation) ensures ADC noise floor remains below 1 µV RMS for Class 0.5 meter compliance |
| VREF | Reference voltage terminal | Accepts external 2.5 V reference or outputs internal 1.2 V bandgap - enables ratiometric or absolute measurement modes |
| RST/NMI/SBWTDIO | Reset / NMI / debug I/O | Single-pin Spy-Bi-Wire interface for in-system programming and debugging without dedicated JTAG header |
| P1.3/P1.4 | USART0 TX/RX (UART mode) | Hardware UART interface for RS-485 or optical port communication in ANSI C12.18/IEC 62056-21 meter protocols |
| P2.6/P2.7 | XT2IN/XT2OUT | Crystal oscillator terminals for 32.768 kHz or 1–16 MHz crystals - supports accurate time-of-use billing and anti-tamper timestamping |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 µA LPM4 current with RAM retention enables >10-year coin-cell battery life in portable metering devices |
| Integrated metrology ADC | Single 24-bit SD24_A with built-in temperature sensor, VCC sense, and programmable reference buffer - eliminates external signal-conditioning ICs |
| Fast wake-up & deterministic timing | <1 µs wake-up from LPM4 ensures precise sampling alignment for harmonic analysis and transient detection |
| On-chip security & reliability | JTAG fuse lock, BOR, SVS with programmable threshold, and 1000-V HBM ESD rating - meets IEC 61000-4-2 and UL 61010-1 requirements |
| Low-cost development path | Spy-Bi-Wire interface and TI's MSP430Ware software stack reduce tooling cost versus full JTAG solutions |
Applications
| Single-Phase Electricity Meter | Digital Power Monitor |
|---|---|
Use Scenario: Residential or commercial kWh meter measuring active/reactive energy using shunt or current transformer inputs. IC Role / Device Role / Timing Role: Primary metrology controller performing simultaneous voltage/current sampling, RMS calculation, tariff switching, and pulse output generation. Use Value: Single 24-bit SD24_A channel with PGA and internal reference achieves Class 0.5 accuracy per IEC 62053-21 without external op-amps or references. |
Use Scenario: DIN-rail mounted panel meter monitoring real-time voltage, current, power factor, and harmonics in industrial distribution panels. IC Role / Device Role / Timing Role: Standalone sensing node acquiring synchronized samples at 1–4 kHz, computing derived parameters, and communicating via UART to HMI or gateway. Use Value: Ultra-low active current (350 µA @ 1 MHz) and LPM4 retention allow continuous background monitoring with minimal thermal drift impact on ADC performance. |
| Sensor Signal Conditioning | Utility Grid Edge Node |
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and leakage current in smart grid infrastructure. IC Role / Device Role / Timing Role: Low-power analog front-end and data logger - digitizing analog sensors, storing trend data, and waking periodically to transmit via LPWAN. Use Value: Integrated temperature sensor and VCC monitor enable self-calibration and supply health reporting without added components. |
Use Scenario: Distributed fault indicator or capacitor bank controller requiring precise voltage sag/swell detection and event logging. IC Role / Device Role / Timing Role: Real-time waveform capture engine triggering on zero-crossing or threshold violation, then storing pre/post-event samples in RAM. Use Value: Deterministic <1 µs wake-up and 12-MHz DCO enable sub-cycle sampling resolution for IEEE 1159-compliant power quality analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430AFE232IPWR | Includes two 24-bit SD24_A converters (vs. one in MSP430AFE231IPWR); identical flash/RAM/clock/peripheral set otherwise | Required when dual-channel isolation is needed (e.g., voltage + current sensing with separate ADC paths) | Select MSP430AFE232IPWR only if additional ADC channel improves measurement independence or reduces external multiplexing complexity |
| MSP430AFE221IPWR | 4 KB flash (vs. 8 KB), 256 B RAM (vs. 512 B), same single SD24_A and peripheral complement | Suitable for simpler firmware with no calibration storage or advanced tariff logic - lower BOM cost where memory headroom is constrained | Choose MSP430AFE221IPWR when application fits within reduced memory and no future feature expansion is planned |
Compared with MSP430AFE231IPWR, MSP430AFE232IPWR adds ADC channel flexibility at no clock/performance trade-off, while MSP430AFE221IPWR reduces memory resources to lower unit cost - both maintain identical pinout, power profile, and metrology-grade ADC architecture.
Availability
MSP430AFE231IPWR is available at Aetrix Electronics and suitable for single-phase electricity meters, digital power monitors, and sensor signal conditioning systems requiring stable component supply across multi-year production cycles.
Supply support for MSP430AFE231IPWR 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 for industrial, automotive, and consumer applications.
The MSP430AFE2xx product line is engineered specifically for ultra-precise, ultra-low-power metrology - integrating sigma-delta ADCs, low-drift references, and robust clock systems to meet international electricity metering standards.
FAQ
What is the maximum crystal frequency supported by MSP430AFE231IPWR?
The MSP430AFE231IPWR supports external high-frequency crystals up to 16 MHz on XT2IN/XT2OUT pins. When used as the MCLK source, the DCO divider must be configured to ensure CPU clock does not exceed 12 MHz at VCC ≥ 3.3 V, per the recommended operating conditions in the SLAS701B datasheet. This allows precise timebase generation for tariff switching and waveform sampling.
Does MSP430AFE231IPWR include an internal voltage reference for the SD24_A ADC?
Yes, MSP430AFE231IPWR includes an internal 1.2 V bandgap reference that can be routed to the SD24_A module via the VREF pin. It also supports external reference inputs (2.5 V typical) and provides a buffered reference output - enabling ratiometric or absolute measurement configurations without external reference ICs.
How many I/O pins are available on MSP430AFE231IPWR, and what are their key capabilities?
MSP430AFE231IPWR provides 11 programmable I/O pins across Ports P1 and P2. All support interrupt-on-change, configurable pullup/pulldown resistors, and multiple peripheral functions including USART, Timer_A capture/compare, and SD24_A bitstream I/O. Pins P1.3/P1.4 are dedicated to UART TX/RX, while P2.6/P2.7 serve as XT2 crystal connections.
What low-power modes are supported by MSP430AFE231IPWR, and what is the lowest current draw?
MSP430AFE231IPWR supports five low-power modes (LPM0–LPM4). In LPM4 (RAM retention, all clocks disabled), it draws just 0.1 µA at 2.2 V and 25°C - verified in Section 5.7 of the SLAS701B datasheet. Wake-up time from LPM4 is under 1 µs, making it ideal for duty-cycled metering applications with strict energy budgets.
Is MSP430AFE231IPWR pin-compatible with other devices in the MSP430AFE2xx family?
Yes, MSP430AFE231IPWR shares the same 24-pin TSSOP (PW) package and pinout with all MSP430AFE2xx variants, including MSP430AFE232IPWR and MSP430AFE221IPWR. Pin functions are identical across the family - allowing hardware reuse when scaling ADC count or memory capacity without PCB redesign.
MSP430AFE231IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tape & Reel (TR)
- 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:
- 8KB (8K 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 1x24b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430AFE231IPWR FAQ
1.How can I place an order for MSP430AFE231IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430AFE231IPWR 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 MSP430AFE231IPWR reliable?
The price and inventory of MSP430AFE231IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430AFE231IPWR is usually 5 days.
3.What payment methods are accepted for MSP430AFE231IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430AFE231IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430AFE231IPWR?
MSP430AFE231IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430AFE231IPWR 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 MSP430AFE231IPWR?
For technical support, including MSP430AFE231IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430AFE231IPWR requirements.
6.How does Aetrix verify that MSP430AFE231IPWR is sourced from the original manufacturer or authorized distributors?
All MSP430AFE231IPWR 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 MSP430AFE231IPWR meets industry standards.
7.What is the process for return or replacement of MSP430AFE231IPWR?
All MSP430AFE231IPWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430AFE231IPWR, 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 MSP430AFE231IPWR part is unused and in its original packaging.
Return procedure for MSP430AFE231IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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