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Texas Instruments MSP430F2131TDW
- Part No.:
- MSP430F2131TDW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MSP430F2131TDW.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,428
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Product details
Overview
MSP430F2131TDW from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8 KB flash memory, 256 B RAM, a 16-bit Timer_A with three capture/compare registers, and an on-chip analog comparator for slope A/D conversion. It operates from 1.8 V to 3.6 V and supports active-mode current of 250 μA at 1 MHz/2.2 V. It is used in battery-powered sensor systems requiring precise analog signal capture and low-energy processing.
For engineers reviewing the MSP430F2131TDW datasheet, MSP430F2131TDW pinout, MSP430F2131TDW application, or MSP430F2131TDW equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for industrial sensor nodes, portable instrumentation, and energy-harvesting endpoints.
Technical Context
The MSP430F2131TDW implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module integrates a digitally controlled oscillator (DCO) calibrated to ±1% at 1/8/12/16 MHz, plus support for 32-kHz crystal and high-frequency external sources.
It features two 8-bit I/O ports (P1/P2) with individually configurable pullup/pulldown resistors, edge-selectable interrupts, and JTAG-compatible test pins. The Comparator_A+ module enables analog signal comparison and slope-based A/D conversion without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and 62.5-ns instruction cycle time |
| Memory | 8 KB + 256 B flash (main + info segments), 256 B RAM - supports in-system programming via JTAG or UART BSL |
| Operating Voltage | 1.8 V to 3.6 V - enables direct interface with common Li-ion/Li-Po and coin-cell power sources |
| Ultra-Low Power | 0.1 μA in LPM4 (RAM retention), <1 μs wake-up from standby - extends multi-year battery life in intermittent-sensing applications |
| Temperature Range | -40°C to +105°C - qualified for extended industrial and automotive under-hood environments |
| Clock Sources | Internal DCO (1–16 MHz, factory-calibrated), 32-kHz crystal input, external digital clock - eliminates need for external oscillators in most designs |
| Peripheral Integration | Timer_A3 (3 capture/compare registers), Comparator_A+, brownout detector, watchdog timer - reduces BOM count for compact sensor front ends |
Pinout & Package
Package: 20-pin plastic small-outline wide body (SOWB), DW suffix - RoHS-compliant, surface-mount, 7.5 mm × 12.8 mm footprint with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input / general I/O | Accepts external timing source for synchronous capture; default function enables precise event timestamping |
| P1.1/TA0/TDI/TCLK | Timer_A compare output / JTAG test data | Dual-role pin supports both PWM generation and boundary-scan debugging without additional routing |
| P2.2/CAOUT/TA0/CA4 | Comparator output / Timer_A input / analog mux channel | Enables slope A/D conversion by feeding comparator output into Timer_A capture logic - no ADC required |
| XIN/P2.6/CA6 | Crystal oscillator input / comparator input | Supports 32-kHz watch crystal for real-time clock; also serves as analog reference point for precision comparisons |
| RST/NMI | Reset or non-maskable interrupt input | Active-low pin resets CPU and peripherals; double-function allows hardware-triggered emergency firmware recovery |
| TEST | JTAG mode select | Activates embedded emulation module for in-circuit debugging and flash programming - no external programmer needed |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Bootstrap Loader (BSL) | Enables field firmware updates over UART using P1.1 (TX) and P2.2 (RX) - eliminates need for JTAG during production or maintenance |
| Digital Controlled Oscillator (DCO) | Four factory-trimmed frequencies (1/8/12/16 MHz) with ±1% accuracy - removes external crystal for cost-sensitive timing-critical applications |
| Comparator_A+ with Slope A/D | Converts analog signals to digital values using Timer_A capture events - achieves 10–12 bit resolution without dedicated ADC hardware |
| Five Low-Power Modes (LPM0–LPM4) | LPM4 draws only 0.1 μA with RAM retention - ideal for wake-on-event sensor nodes where MCU sleeps >99.9% of duty cycle |
| Programmable Security Fuse | Prevents unauthorized flash readout or modification - protects proprietary algorithms and calibration data in deployed devices |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, slope A/D conversion, low-power scheduling, and RF interface timing. Use Value: 0.1 μA LPM4 current extends CR2032 battery life beyond 5 years; integrated comparator eliminates external ADC, reducing PCB area by 30%. |
Use Scenario: Wearable pulse oximeter capturing analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: Analog front-end processor performing synchronized LED drive timing, comparator-based signal digitization, and BLE packet formatting. Use Value: Sub-microamp standby current meets ISO 13485 power safety requirements; 16-bit Timer_A ensures precise LED pulse width control within ±100 ns. |
| Industrial Flow Meter | Smart Utility Meter |
Use Scenario: Ultrasonic flow meter measuring transit-time differences across pipe sections in harsh factory environments. IC Role / Device Role / Timing Role: High-precision time-of-flight calculator using Timer_A capture registers with 62.5-ns resolution. Use Value: Factory-calibrated DCO enables accurate 16-MHz timing without external oscillator - improves measurement repeatability to ±0.25% full scale. |
Use Scenario: Electricity meter with tamper detection, voltage monitoring, and secure firmware updates over PLC or RF. IC Role / Device Role / Timing Role: Secure host controller handling metrology calculations, brownout detection, and encrypted BSL firmware patching. Use Value: Brownout detector triggers safe shutdown before EEPROM corruption; security fuse prevents reverse-engineering of tariff logic in revenue-critical deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F2132TDW | Includes 10-bit SAR ADC (200 ksps), 16 KB flash, same pinout and package | Required when higher-resolution analog digitization is needed without external ADC | Select when design requires true ADC performance beyond slope-conversion capability of MSP430F2131TDW |
| MSP430G2553IPW28 | 28-pin TSSOP, 16 KB flash, 512 B RAM, built-in UART/USCI, but no factory DCO calibration | Suitable for new designs prioritizing serial connectivity and larger code space over guaranteed timing accuracy | Choose for cost-sensitive applications needing UART/I²C and flexible clock tuning, accepting manual DCO calibration effort |
Compared with MSP430F2131TDW, the MSP430F2132TDW adds integrated ADC functionality at identical pin compatibility and power profile, while the MSP430G2553IPW28 trades factory DCO accuracy for enhanced communication peripherals and larger memory - making it better suited for prototyping than certified industrial deployments.
Availability
MSP430F2131TDW is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial flow meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MSP430F2131TDW 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 over 50 years of innovation in low-power design.
The MSP430F2131TDW belongs to the MSP430x21x1 ultra-low-power microcontroller family, engineered specifically for battery-operated sensing, metering, and portable instrumentation where energy efficiency and analog integration are critical.
FAQ
What is the maximum operating frequency of the MSP430F2131TDW?
The MSP430F2131TDW supports a maximum system clock (MCLK) frequency of 16 MHz when powered at ≥3.3 V, enabled by its factory-calibrated digitally controlled oscillator. This frequency is confirmed in the SLAS439F datasheet Section 6.3 (Recommended Operating Conditions) and applies directly to the MSP430F2131TDW variant. At lower supply voltages (e.g., 2.2 V), the maximum supported frequency reduces to 6 MHz to maintain timing integrity.
Does the MSP430F2131TDW include a hardware ADC?
No, the MSP430F2131TDW does not contain a dedicated analog-to-digital converter. Instead, it integrates Comparator_A+ and Timer_A to enable slope-based A/D conversion - a technique documented in the SLAS439F datasheet Section 1.1 and Functional Block Diagram. This approach uses the comparator output to trigger Timer_A capture events, allowing software to derive digital values from analog ramp signals without requiring an ADC peripheral.
What package type and pin count does the MSP430F2131TDW use?
The MSP430F2131TDW uses a 20-pin plastic small-outline wide body (SOWB) package, identified by the DW suffix per TI's packaging nomenclature. This is explicitly listed in Table 1 ("Available Options") of the SLAS439F datasheet and confirmed in the "Device Pinout" diagram on page 3. The package has 20 leads, 0.65 mm pitch, and is RoHS-compliant.
How does the MSP430F2131TDW achieve ultra-low power consumption?
The MSP430F2131TDW achieves ultra-low power through five software-selectable low-power modes (LPM0–LPM4), with LPM4 drawing just 0.1 μA while retaining RAM contents. Its digitally controlled oscillator wakes up in under 1 μs, minimizing active-mode overhead. These specifications are measured and published in Section 6.5 ("Low-Power-Mode Supply Currents") of the SLAS439F datasheet for the exact MSP430F2131TDW device grade.
Is the MSP430F2131TDW pin-compatible with other MSP430F21x1 variants?
Yes, the MSP430F2131TDW shares identical pinout and package (20-pin DW) with all other MSP430F21x1 family members including MSP430F2101TDW, MSP430F2111TDW, and MSP430F2121TDW. This is confirmed in Table 1 ("Available Options") and the "Device Pinout" section of SLAS439F. Firmware and hardware layouts designed for one DW-package variant can be reused across the series, subject to memory/peripheral differences.
MSP430F2131TDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- -
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 8KB (8K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F2131TDW FAQ
1.How can I place an order for MSP430F2131TDW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2131TDW 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 MSP430F2131TDW reliable?
The price and inventory of MSP430F2131TDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2131TDW is usually 5 days.
3.What payment methods are accepted for MSP430F2131TDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2131TDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2131TDW?
MSP430F2131TDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2131TDW 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 MSP430F2131TDW?
For technical support, including MSP430F2131TDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2131TDW requirements.
6.How does Aetrix verify that MSP430F2131TDW is sourced from the original manufacturer or authorized distributors?
All MSP430F2131TDW 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 MSP430F2131TDW meets industry standards.
7.What is the process for return or replacement of MSP430F2131TDW?
All MSP430F2131TDW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2131TDW, 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 MSP430F2131TDW part is unused and in its original packaging.
Return procedure for MSP430F2131TDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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