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Texas Instruments MSP430F2131IPWR
- Part No.:
- MSP430F2131IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F2131IPWR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:945
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Product details
Overview
MSP430F2131IPWR from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB + 256 B 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 - ideal for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F2131IPWR datasheet, MSP430F2131IPWR pinout, MSP430F2131IPWR application, or MSP430F2131IPWR equivalent, key selection criteria include its 20-pin TSSOP package, calibrated DCO up to 16 MHz, brownout detection, JTAG-based on-chip emulation, and support for ultra-fast wake-up (<1 μs) from standby mode.
Technical Context
The MSP430F2131IPWR implements a 16-bit RISC 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.
Peripheral integration includes Timer_A3 with three independent capture/compare channels, Comparator_A+ with eight selectable inputs (CA0–CA7), two 8-bit I/O ports (P1/P2) with individually programmable pullup/down resistors and edge-selectable interrupts, and a bootstrap loader accessible via UART on P1.1/P2.2.
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 at 16 MHz |
| Memory | 8 KB flash + 256 B information memory + 256 B RAM - supports in-system programming and BSL-based UART updates |
| Supply Voltage | 1.8 V to 3.6 V - enables direct operation from single-cell Li-ion or dual-cell alkaline batteries |
| Active Current | 250 μA at 1 MHz/2.2 V - allows >10-year battery life in duty-cycled sensor applications |
| Low-Power Modes | LPM4 draws 0.1 μA with RAM retention - critical for long-term data logging without external RTC |
| Wake-Up Time | <1 μs from LPM4 - ensures deterministic real-time response to external events like motion or voltage thresholds |
| Comparator | Comparator_A+ with 8-channel analog mux and CAOUT output - enables hardware-accelerated slope ADC without external components |
Pinout & Package
Package: 20-pin TSSOP (PW), body width 4.4 mm, thermal pad not present - compatible with standard surface-mount reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input / GPIO | Accepts external timing source for precise event synchronization or serves as general-purpose I/O with interrupt capability |
| P1.1/TA0/TMS | Timer_A CCI0A / JTAG TMS / BSL TX | Supports capture/compare, boundary-scan test control, or serial firmware loading via UART boot interface |
| P1.2/TA1 | Timer_A CCI1A / GPIO | Enables second capture channel or PWM output; retains interrupt and pullup/down configuration in all power modes |
| P1.3/TA2 | Timer_A CCI2A / GPIO | Provides third independent capture/compare path; usable for multi-phase timing or pulse-width measurement |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG TCK | Exposes SMCLK for peripheral clocking or acts as JTAG test clock - eliminates need for external clock generator |
| P2.0/ACLK/CA2 | ACLK output / Comparator_A+ input | Drives 32-kHz watch crystal signal to peripherals or feeds external analog signal into comparator for threshold detection |
| XIN/P2.6/CA6 | Crystal oscillator input / Comparator_A+ input | Accepts 32-kHz crystal for low-power real-time clock or routes analog voltage to comparator for battery monitoring |
| RST/NMI | Reset / non-maskable interrupt | Hardware reset initiation and high-priority fault handling - supports brownout recovery and watchdog timeout response |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 μA in LPM4 with RAM retention enables decade-scale battery life in remote sensors without external power management |
| Digital-controlled oscillator (DCO) | Four factory-calibrated frequencies (1/8/12/16 MHz ±1%) allow rapid clock startup and stable timing without external crystal |
| On-chip analog comparator | Eight-input mux with CAOUT simplifies battery voltage supervision, zero-crossing detection, or slope A/D conversion without ADC hardware |
| Bootstrap loader (BSL) | UART-based flash programming via P1.1/P2.2 eliminates need for JTAG debugger in production firmware updates |
| JTAG emulation module | Full-featured on-chip debug interface supports breakpoints, watchpoints, and real-time register inspection during development |
Applications
| Wireless Sensor Node | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Compact environmental sensor collecting temperature/humidity and transmitting via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Main system controller executing sensor readout, data processing, and RF packet scheduling using Timer_A and Comparator_A+. Use Value: Ultra-low active and standby currents extend coin-cell battery life beyond 5 years; fast wake-up ensures timely response to trigger events. |
Use Scenario: Industrial equipment monitoring vibration, temperature, and supply voltage over extended periods. IC Role / Device Role / Timing Role: Standalone data acquisition unit with periodic sampling, threshold-triggered storage, and timestamping via ACLK-driven Timer_A. Use Value: LPM4 current of 0.1 μA enables multi-year unattended operation; internal comparator replaces discrete voltage supervisors. |
| Portable Medical Monitor | Smart Utility Meter Interface |
|
Use Scenario: Wearable pulse oximeter requiring low-noise analog front-end and minimal power draw. IC Role / Device Role / Timing Role: Signal conditioner and controller interfacing photodiode amplifier, driving LED drivers, and managing user interface. Use Value: Comparator_A+ performs analog signal comparison for saturation detection; 1.8 V minimum supply supports single-LiPo operation. |
Use Scenario: Electricity meter auxiliary interface capturing tamper alerts, load profiling, and communication status. IC Role / Device Role / Timing Role: Secondary controller handling isolated I/O, secure event logging, and RS-485/IR communication co-processing. Use Value: Brownout detector ensures reliable reset during grid fluctuations; flash memory stores calibration and event history securely. |
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 pinout and peripheral set - lacks 4 KB of program space | Suitable for simpler firmware with smaller code footprint; same power profile and timing capabilities | Select when application fits within 4 KB flash and cost sensitivity outweighs future firmware scalability needs |
| MSP430F2132IPW | 8 KB flash, 256 B RAM, added 10-bit ADC with sample-and-hold - requires different initialization and driver code | Enables direct analog signal digitization without external ADC; increases BOM count but reduces design complexity | Choose when analog sensor integration demands integrated ADC resolution and sampling control beyond comparator-only functions |
Compared with MSP430F2121IPW, the MSP430F2131IPWR provides double flash capacity for feature-rich firmware while maintaining identical power behavior and pin compatibility; versus MSP430F2132IPW, it trades integrated ADC capability for lower gate count and simpler analog subsystem design.
Availability
MSP430F2131IPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, and portable medical monitors requiring stable component supply across industrial temperature ranges (-40°C to 85°C).
Supply support for MSP430F2131IPWR 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 focused on analog and embedded processing technologies, with decades of expertise in ultra-low-power design and mixed-signal integration.
The MSP430F2131IPWR belongs to the MSP430x21x1 series - engineered specifically for extended-battery-life portable measurement applications where precision analog sensing, deterministic timing, and minimal active/standby current are critical.
FAQ
What is the maximum operating frequency of the MSP430F2131IPWR?
The MSP430F2131IPWR supports a maximum system clock (MCLK) frequency of 16 MHz when supplied at ≥3.3 V, enabled by its factory-calibrated digitally controlled oscillator (DCO). At lower voltages (e.g., 2.2 V), the maximum supported frequency is 6 MHz per TI's recommended operating conditions. This frequency governs CPU execution speed, Timer_A timing resolution, and peripheral clock rates - all directly tied to the DCO calibration values stored in flash segment A.
Does the MSP430F2131IPWR include an analog-to-digital converter (ADC)?
No, the MSP430F2131IPWR does not integrate a dedicated ADC. Instead, it features Comparator_A+ with slope A/D conversion capability - using the built-in 16-bit Timer_A to measure comparator output transition times and derive digital values from analog inputs. This architecture reduces silicon area and power consumption compared to a full ADC, making it suitable for applications where moderate resolution (e.g., 10–12 bits) and low sampling rate are acceptable.
What debug interfaces are supported by the MSP430F2131IPWR?
The MSP430F2131IPWR supports JTAG-based debugging via pins P1.4/TCK, P1.5/TMS, P1.6/TDI, P1.7/TDO, and RST/NMI - fully compatible with TI's MSP-FET430UIF and MSP-FET430U28 tools. It also includes an on-chip emulation module (EEM) enabling real-time breakpoints, register inspection, and flash programming without external hardware. The TEST pin (Pin 1) enables JTAG fuse control for security lockout.
Can the MSP430F2131IPWR operate from a single 1.8 V supply?
Yes, the MSP430F2131IPWR is fully specified to operate from 1.8 V to 3.6 V, including flash programming (minimum 2.2 V required for write/erase) and active-mode execution. At 1.8 V, its maximum MCLK frequency is limited to 6 MHz, and active current drops to ~200 μA at 1 MHz - enabling robust operation in energy-constrained designs such as coin-cell-powered IoT endpoints.
What packaging options are available for the MSP430F2131IPWR?
The MSP430F2131IPWR is supplied exclusively in the 20-pin TSSOP (Thin Shrink Small Outline Package) with body width 4.4 mm and JEDEC-standard lead pitch of 0.65 mm. This package is distinct from the DW (SOWB), DGV (TVSOP), and RGE (QFN) variants listed in TI's datasheet - the "PW" suffix explicitly denotes the TSSOP variant, which offers hand-solderability, optical inspection compatibility, and mature assembly process support.
MSP430F2131IPWR 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:
- 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:
MSP430F2131IPWR FAQ
1.How can I place an order for MSP430F2131IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2131IPWR 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 MSP430F2131IPWR reliable?
The price and inventory of MSP430F2131IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2131IPWR is usually 5 days.
3.What payment methods are accepted for MSP430F2131IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2131IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2131IPWR?
MSP430F2131IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2131IPWR 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 MSP430F2131IPWR?
For technical support, including MSP430F2131IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2131IPWR requirements.
6.How does Aetrix verify that MSP430F2131IPWR is sourced from the original manufacturer or authorized distributors?
All MSP430F2131IPWR 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 MSP430F2131IPWR meets industry standards.
7.What is the process for return or replacement of MSP430F2131IPWR?
All MSP430F2131IPWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2131IPWR, 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 MSP430F2131IPWR part is unused and in its original packaging.
Return procedure for MSP430F2131IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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