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Texas Instruments MSP430F2131IDWR
- Part No.:
- MSP430F2131IDWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MSP430F2131IDWR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
MSP430F2131IDWR 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 MSP430F2131IDWR datasheet, MSP430F2131IDWR pinout, MSP430F2131IDWR application, or MSP430F2131IDWR equivalent, key selection criteria include its 20-pin TSSOP (PW) package, integrated DCO with ±1% factory calibration at 1/8/12/16 MHz, brownout detection, and JTAG + BSL programming support - all critical for low-power embedded firmware development and production programming.
Technical Context
The MSP430F2131IDWR 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 via P1SEL/P2SEL. The Comparator_A+ module accepts eight analog inputs (CA0–CA7), supports rail-to-rail operation, and enables 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 - enables deterministic real-time control in compact firmware. |
| Memory | 8 KB flash + 256 B RAM - sufficient for standalone sensor firmware with calibration data storage and interrupt-driven processing. |
| Supply Voltage | 1.8 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, or dual-AA alkaline power rails without LDO overhead. |
| Active Current | 250 μA at 1 MHz / 2.2 V - allows >1-year battery life in wake-up-and-transmit sensor applications with sub-second duty cycles. |
| Wake-up Time | <1 μs from LPM3/LPM4 - ensures rapid response to external events (e.g., motion or voltage threshold crossing) while preserving energy. |
| Comparator Inputs | 8-channel analog mux (CA0–CA7) - supports multi-sensor monitoring (e.g., temperature, battery voltage, ambient light) with shared comparator hardware. |
| Timer Resources | Timer_A3 with three capture/compare registers - provides simultaneous PWM generation, input capture, and interval timing for motor control or signal analysis. |
Pinout & Package
Package: 20-pin TSSOP (PW), body width 4.4 mm, JEDEC MO-153 compliant. Thermal performance optimized for PCB copper pour under exposed pad (not applicable to PW).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input | Accepts external clock source for precise timing synchronization; also functions as general-purpose I/O. |
| P1.1/TA0/TDI/TCLK | Timer_A channel 0 I/O / JTAG test interface | Supports BSL UART transmit (BSL mode) or JTAG TDI/TCLK (debug mode); dual-use reduces pin count. |
| P1.2–P1.7 | Timer_A channels 1–2 I/O / JTAG TDO/TMS/TCK | Shared timer outputs and JTAG signals enable in-system debugging without dedicated debug header footprint. |
| P2.0/ACLK/CA2 | ACLK output / comparator input | Drives 32-kHz watch crystal oscillator output while serving as analog input - simplifies clock tree and sensor front-end integration. |
| XIN/P2.6/CA6 & XOUT/P2.7/CA7 | Crystal oscillator terminals / comparator inputs | Dedicated crystal pins with internal load capacitance; CA6/CA7 reuse enables reference voltage monitoring during crystal operation. |
| RST/NMI | Reset / non-maskable interrupt | Hardware reset initiation and high-priority event handling (e.g., power-fail detection) with glitch filtering. |
| TEST | JTAG mode select | Activates JTAG interface when pulled high during power-up - enables secure programming without permanent debug pads. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | LPM4 current ≤0.1 μA with RAM retention - extends shelf life and field deployment duration in energy-harvesting or coin-cell devices. |
| Factory-calibrated DCO | Four frequencies (1/8/12/16 MHz) trimmed to ±1% - eliminates external crystal for cost-sensitive timing-critical applications like IR remotes. |
| On-chip emulation module (EEM) | Hardware debug support via MSP-FET430UIF - enables full-speed breakpoints, register inspection, and flash programming without target code modification. |
| Bootstrap loader (BSL) | UART-based flash programming using P1.1/P2.2 - allows field firmware updates over existing serial interfaces without JTAG hardware. |
| Brownout protection | Detects VCC drop below programmable threshold and asserts RST - prevents erratic execution during battery depletion or supply transients. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF IC every 30 seconds. IC Role / Device Role / Timing Role: Main controller executing sensor readout, ADC slope conversion via Comparator_A+, and low-duty-cycle RF wake-up scheduling. Use Value: 0.1 μA LPM4 current extends CR2032 battery life beyond 2 years; integrated 16-bit Timer_A synchronizes RF packet timing without external timers. |
Use Scenario: Handheld pulse oximeter with LED drivers, photodiode amplifier, and OLED display. IC Role / Device Role / Timing Role: Signal processor managing LED current modulation, analog comparator-based ambient light rejection, and display refresh timing. Use Value: Slope A/D capability eliminates external ADC; 256 B RAM buffers waveform samples for SpO₂ calculation; 1.8 V operation matches OLED driver voltage range. |
| Smart Utility Meter Interface | Industrial Battery Management Unit |
|
Use Scenario: Tamper-detection module monitoring enclosure switch, voltage rail, and meter pulse output in electricity meters. IC Role / Device Role / Timing Role: Event logger capturing timestamped interrupts from P1/P2 pins and performing cryptographic checksums on stored data. Use Value: Edge-selectable interrupts on all 16 I/O pins enable simultaneous monitoring of multiple tamper sources; 8 KB flash stores 6 months of event logs with firmware update space. |
Use Scenario: Lithium-ion pack monitor measuring cell voltages, temperatures, and charge/discharge currents in UPS systems. IC Role / Device Role / Timing Role: Analog front-end controller using Comparator_A+ for overvoltage/undervoltage window detection and Timer_A for precise discharge timing. Use Value: Rail-to-rail comparator inputs directly interface with resistor-divider networks; brownout detector prevents false triggers during load dump transients. |
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 |
|---|---|---|---|
| MSP430F2121IPW | 4 KB flash, 256 B RAM, identical peripherals and pinout | Suitable for firmware with smaller code footprint; lacks headroom for future feature expansion | Select when application firmware fits within 4 KB and cost sensitivity outweighs field-upgrade flexibility. |
| MSP430G2553IPW28 | 16 KB flash, 512 B RAM, enhanced USCI UART/SPI/I²C, same 20-pin TSSOP but different pin mapping | Requires PCB redesign due to non-compatible pinout; adds communication peripherals absent in F2131 | Choose when UART/I²C connectivity is mandatory and board revision is feasible; not drop-in replaceable. |
Compared with MSP430F2121IPW, the MSP430F2131IDWR provides double flash capacity for complex sensor fusion algorithms, while MSP430G2553IPW28 trades pin compatibility for richer serial interfaces - making MSP430F2131IDWR optimal for cost-constrained, pin-stable designs requiring long-term firmware maintainability.
Availability
MSP430F2131IDWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meter interfaces, and industrial battery management units requiring stable component supply across extended product lifecycles.
Supply support for MSP430F2131IDWR 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 decades of microcontroller innovation.
The MSP430F2131IDWR belongs to the MSP430x2xx ultra-low-power MCU family, designed specifically for battery-operated measurement and sensing applications where nanowatt-level sleep current and fast wake-up are essential.
FAQ
What is the maximum operating frequency of the MSP430F2131IDWR?
The MSP430F2131IDWR supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥ 3.3 V, with factory-trimmed DCO calibration at 1/8/12/16 MHz ensuring ±1% accuracy without external crystal. At 2.7 V, max frequency is 12 MHz; at 1.8 V, it is limited to 6 MHz per TI's recommended operating conditions.
Does the MSP430F2131IDWR support in-system programming without a JTAG debugger?
Yes, the MSP430F2131IDWR includes a UART-based bootstrap loader (BSL) accessible via P1.1 (TXD) and P2.2 (RXD). With a simple level-shifter circuit, firmware updates can be performed in-system using only a UART interface - no JTAG hardware or MSP-FET is required for field upgrades.
What package type does the MSP430F2131IDWR use, and is it RoHS-compliant?
The MSP430F2131IDWR uses a 20-pin plastic thin-shrink small-outline package (TSSOP, PW), JEDEC MO-153 compliant. It is RoHS-compliant and lead-free, with NiPdAu terminal finish and halogen-free molding compound per TI's packaging specifications.
How much RAM and flash memory does the MSP430F2131IDWR have?
The MSP430F2131IDWR integrates 256 bytes of RAM and 8 KB of flash memory. Flash is organized into 512-byte segments, including four 64-byte information memory segments (A–D); segment A contains factory DCO calibration data and is protected by default after reset.
Can the MSP430F2131IDWR operate from a single 1.8 V supply?
Yes, the MSP430F2131IDWR is fully specified to operate from 1.8 V to 3.6 V. At 1.8 V, it supports up to 6 MHz MCLK, consumes 250 μA in active mode at 1 MHz, and maintains full functionality of Timer_A, Comparator_A+, and I/O ports - ideal for energy-harvesting or coin-cell applications.
MSP430F2131IDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F2131IDWR FAQ
1.How can I place an order for MSP430F2131IDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2131IDWR 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 MSP430F2131IDWR reliable?
The price and inventory of MSP430F2131IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2131IDWR is usually 5 days.
3.What payment methods are accepted for MSP430F2131IDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2131IDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2131IDWR?
MSP430F2131IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2131IDWR 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 MSP430F2131IDWR?
For technical support, including MSP430F2131IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2131IDWR requirements.
6.How does Aetrix verify that MSP430F2131IDWR is sourced from the original manufacturer or authorized distributors?
All MSP430F2131IDWR 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 MSP430F2131IDWR meets industry standards.
7.What is the process for return or replacement of MSP430F2131IDWR?
All MSP430F2131IDWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2131IDWR, 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 MSP430F2131IDWR part is unused and in its original packaging.
Return procedure for MSP430F2131IDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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