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Texas Instruments MSP430F2131TPWR
- Part No.:
- MSP430F2131TPWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F2131TPWR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,319
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Product details
Overview
MSP430F2131TPWR from Texas Instruments is an ultra-low-power 16-bit RISC 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 - optimized for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F2131TPWR datasheet, MSP430F2131TPWR pinout, MSP430F2131TPWR application, or MSP430F2131TPWR equivalent, key selection criteria include its TSSOP-20 package, -40°C to 105°C temperature grade, integrated DCO with four factory-calibrated frequencies (1–16 MHz), brownout detection, and JTAG/on-chip emulation support for low-overhead debugging.
Technical Context
The MSP430F2131TPWR implements a 16-bit CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal input (XIN/XOUT), and high-frequency crystal support up to 16 MHz - all configurable via BCSCTL registers.
It features two 8-bit I/O ports (P1/P2) with individually programmable pullup/pulldown resistors, edge-selectable interrupts, and peripheral mapping including Timer_A inputs (TACLK, INCLK, CCIxA/CCIxB), comparator inputs (CA0–CA7), and JTAG signals multiplexed on P1 pins. The comparator_A+ module enables precision slope ADC and battery-supervision functions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 62.5-ns instruction cycle time - enables deterministic real-time control in resource-constrained embedded designs. |
| Memory | 8 KB flash + 256 B RAM - sufficient for standalone sensor firmware with calibration data storage and runtime variable allocation. |
| Supply Voltage | 1.8 V to 3.6 V - supports direct connection to single-cell Li-ion, LiFePO₄, or dual-AA alkaline battery stacks without regulation. |
| Active Current | 250 μA at 1 MHz / 2.2 V - extends battery life in periodic wake-up sensor applications (e.g., every 10 s for 10 ms active time). |
| Wake-up Time | <1 μs from LPM3/LPM4 - allows rapid response to external interrupts while maintaining sub-μA sleep current (0.1 μA off-mode). |
| Temperature Range | -40°C to +105°C - qualified for industrial and automotive under-hood sensor environments without derating. |
| Clock Sources | Internal DCO (1–16 MHz, ±1% factory-calibrated), 32-kHz crystal, external digital clock - eliminates need for external oscillators in most timing-critical applications. |
Pinout & Package
Package: 20-pin TSSOP (PW), JEDEC MO-153, 6.5 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch. Thermal pad not present - standard surface-mount reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input | Accepts external timing signal for precise event synchronization or gated sampling windows. |
| P1.1/TA0/TDI | Timer_A compare output / JTAG test data input | Dual-use pin enables PWM generation or debug interface access - requires mode selection via P1SEL. |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG test clock | Provides system-peripheral clock to external logic or synchronizes JTAG programming sequences. |
| P2.0/ACLK/CA2 | ACLK output / comparator input | Drives 32-kHz watch crystal circuit or feeds analog reference voltage into comparator_A+ channel 2. |
| XIN/P2.6/CA6 | Crystal oscillator input / comparator input | Connects to low-frequency crystal; also serves as analog input for battery monitoring or threshold detection. |
| RST/NMI | Reset or non-maskable interrupt | Hardware reset initiation or high-priority fault handling - active-low, Schmitt-triggered for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 μA off-mode (RAM retention) and 0.7 μA standby - enables >10-year battery life in wireless sensor endpoints. |
| On-chip analog comparator | Supports slope A/D conversion with internal 8-channel mux (CA0–CA7) - eliminates external ADC and reduces BOM count. |
| Bootstrap loader (BSL) | UART-based flash programming via P1.1/P2.2 - enables field firmware updates without JTAG hardware. |
| Digital I/O flexibility | 16 GPIO pins with individually configurable direction, pullup/pulldown, and interrupt edge select - simplifies PCB routing and reduces external glue logic. |
| Brownout protection | Integrated voltage monitor with hysteresis - prevents erratic execution during battery sag or power ramp-up. |
Applications
| Wireless Sensor Node | Industrial Temperature Monitor |
|---|---|
|
Use Scenario: Battery-powered environmental sensor collecting temperature/humidity data every 30 seconds and transmitting via sub-GHz RF link. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, data processing, RF transceiver timing, and ultra-low-power sleep/wake cycles. Use Value: Sub-μA LPM4 current and <1 μs wake-up enable multi-year operation on CR2032 coin cell without voltage regulation. |
Use Scenario: DIN-rail mounted enclosure monitoring motor winding temperature using PT100 RTD and reporting via RS-485. IC Role / Device Role / Timing Role: Signal conditioner and protocol handler - digitizing analog sensor output, applying linearization, and formatting Modbus frames. Use Value: Integrated comparator and 16-bit Timer_A support precise RTD excitation timing and slope ADC conversion without external op-amps or timers. |
| Smart Meter Tamper Detection | Portable Medical Glucose Reader |
|
Use Scenario: Utility meter detecting magnetic tampering via Hall-effect sensor and logging events to secure flash memory. IC Role / Device Role / Timing Role: Real-time security monitor - sampling analog sensor, verifying cryptographic keys, and triggering secure erase on violation. Use Value: Flash memory security fuse and BSL password protection prevent unauthorized firmware modification or data extraction. |
Use Scenario: Handheld device measuring blood glucose concentration via electrochemical strip and displaying results on LCD. IC Role / Device Role / Timing Role: Analog front-end controller - biasing test strip, integrating current pulses, and compensating for temperature drift. Use Value: Comparator_A+ with internal reference and programmable hysteresis enables accurate, low-noise current-to-voltage conversion at sub-μA levels. |
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 |
|---|---|---|---|
| MSP430F2121TPWR | 4 KB flash, 256 B RAM, same peripherals and package - 50% less program memory. | Suitable for simpler sensor firmware with fixed calibration tables and no OTA update capability. | Select when firmware size is ≤3.5 KB and future feature expansion is unlikely. |
| MSP430F2132TPWR | Adds 10-bit SAR ADC (6 channels), retains 8 KB flash and 256 B RAM - no comparator_A+ slope ADC mode. | Better for applications requiring multi-channel analog sensing but not slope-based battery monitoring. | Choose when higher-resolution ADC is required and comparator-driven A/D conversion is unnecessary. |
Compared with MSP430F2121TPWR, the MSP430F2131TPWR provides double flash capacity for complex algorithms and secure bootloader space; compared with MSP430F2132TPWR, it trades integrated SAR ADC for dedicated comparator_A+ functionality - making it optimal for cost-sensitive, ultra-low-power slope ADC or analog window-comparison tasks.
Availability
MSP430F2131TPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial temperature monitors, smart meter tamper detection, and portable medical glucose readers requiring stable component supply across extended product lifecycles.
Supply support for MSP430F2131TPWR 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 90 years of innovation in low-power design.
The MSP430F2131TPWR belongs to the MSP430x2xx ultra-low-power MCU family, engineered specifically for battery-operated measurement and sensing applications where energy efficiency, integration, and long-term reliability are critical.
FAQ
What is the maximum operating frequency of the MSP430F2131TPWR?
The MSP430F2131TPWR supports a maximum MCLK frequency of 16 MHz when VCC ≥3.3 V, with factory-calibrated DCO settings for 1 MHz, 8 MHz, 12 MHz, and 16 MHz. At 2.7 V, the guaranteed maximum is 12 MHz, and at 1.8 V, it is 6 MHz - all specified under recommended operating conditions in SLAS439F.
Does the MSP430F2131TPWR include a hardware ADC?
No, the MSP430F2131TPWR does not include a successive-approximation (SAR) or sigma-delta ADC. Instead, it integrates Comparator_A+, which supports slope analog-to-digital conversion using an internal timer and capacitor charging - a software-configurable, ultra-low-power alternative to dedicated ADC modules.
What debug interfaces are supported by the MSP430F2131TPWR?
The MSP430F2131TPWR supports JTAG via P1.6 (TDI/TCLK), P1.7 (TDO/TDI), P1.5 (TMS), and P1.4 (TCK), plus Spy-Bi-Wire (2-wire JTAG) for reduced pin count. It also includes an on-chip emulation module (EEM) compatible with MSP-FET430UIF and MSP-FET430U28 debuggers.
Can the MSP430F2131TPWR operate from a single 1.8-V supply?
Yes, the MSP430F2131TPWR is fully functional at 1.8 V - the minimum rated supply voltage. All peripherals, including flash programming (requires ≥2.2 V), Timer_A, comparator, and I/O, operate correctly within specification at this voltage, enabling direct use with emerging low-voltage energy-harvesting sources.
What is the purpose of the TEST pin on the MSP430F2131TPWR?
The TEST pin (Pin 1) on the MSP430F2131TPWR selects JTAG test mode during device programming and connects to the JTAG fuse. It must be held high during normal operation and pulled low only during fuse-blowing procedures - improper biasing can disrupt JTAG communication or cause unintended device protection activation.
MSP430F2131TPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-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:
- 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:
MSP430F2131TPWR FAQ
1.How can I place an order for MSP430F2131TPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2131TPWR 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 MSP430F2131TPWR reliable?
The price and inventory of MSP430F2131TPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2131TPWR is usually 5 days.
3.What payment methods are accepted for MSP430F2131TPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2131TPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2131TPWR?
MSP430F2131TPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2131TPWR 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 MSP430F2131TPWR?
For technical support, including MSP430F2131TPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2131TPWR requirements.
6.How does Aetrix verify that MSP430F2131TPWR is sourced from the original manufacturer or authorized distributors?
All MSP430F2131TPWR 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 MSP430F2131TPWR meets industry standards.
7.What is the process for return or replacement of MSP430F2131TPWR?
All MSP430F2131TPWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2131TPWR, 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 MSP430F2131TPWR part is unused and in its original packaging.
Return procedure for MSP430F2131TPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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