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Texas Instruments MSP430G2131IN14
- Part No.:
- MSP430G2131IN14
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MSP430G2131IN14.pdf
- Description:
- IC MCU 16BIT 1KB FLASH 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:431
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Product details
Overview
MSP430G2131IN14 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in 14-pin PDIP packaging, featuring 1 kB Flash, 128 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, Timer_A with two capture/compare registers, and USI supporting SPI/I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes requiring analog signal acquisition, local processing, and serial communication.
For engineers reviewing the MSP430G2131IN14 datasheet, MSP430G2131IN14 pinout, MSP430G2131IN14 application, or MSP430G2131IN14 equivalent, this page delivers verified technical context, exact pin functions, low-power operating mode behavior, ADC configuration constraints, and validated alternative options for cost-optimized embedded designs.
Technical Context
The MSP430G2131IN14 implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions in one MCLK cycle. Its clock system integrates a digitally controlled oscillator (DCO), internal LF oscillator, and external 32-kHz crystal support - enabling sub-1 µs wake-up from LPM4 via ACLK-triggered interrupts.
Peripherals include a 10-bit SAR ADC with sample-and-hold and autoscan across eight channels (A0–A7), a two-register Timer_A2 for PWM and interval timing, and a Universal Serial Interface (USI) configurable for synchronous SPI or I²C operation using P1.6/P1.7 pins. Brownout detection and programmable code protection via security fuse are integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 51-instruction set; enables efficient C compilation and deterministic real-time execution. |
| Flash / RAM | 1 kB Flash program memory and 128 B RAM; sufficient for firmware with ADC data buffering and lightweight protocol stacks. |
| ADC Resolution & Speed | 10-bit SAR ADC with 200 ksps sampling rate and internal reference; supports autoscan of up to 8 analog inputs without CPU intervention. |
| Low-Power Modes | Five software-selectable modes including LPM4 (0.1 µA at 2.2 V); enables multi-year operation on coin-cell batteries in sleep-dominated applications. |
| Operating Voltage | 1.8 V to 3.6 V supply range; compatible with single-cell Li-ion, alkaline, or NiMH power sources without external regulation. |
| Timer Resource | Timer_A2 with two capture/compare registers (TA0.0, TA0.1); supports PWM generation, input capture, and precise timebase for ADC triggering. |
| Communication Interface | USI module supporting hardware SPI and I²C protocols on shared P1.6/P1.7 pins; eliminates need for external level shifters in sensor bus interfacing. |
Pinout & Package
Package: 14-pin plastic dual-inline package (PDIP), N suffix, 0.3-inch width, through-hole mounting compatible with legacy prototyping and industrial PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DVCC) | Power supply | Primary digital supply voltage input (1.8–3.6 V); must be decoupled locally with 100 nF ceramic capacitor. |
| 14 (DVSS) | Ground reference | Digital ground return path; requires low-impedance connection to system ground plane. |
| P1.0/TA0CLK/ACLK/A0 | Multi-function I/O | Configurable as timer clock input (TA0CLK), auxiliary clock output (ACLK), or ADC channel 0 input (A0). |
| P1.1/TA0.0/A1 | Multi-function I/O | Supports Timer_A compare output (Out0), capture input (CCI0A), or ADC channel 1 input (A1). |
| P1.2/TA0.1/A2 | Multi-function I/O | Supports Timer_A compare output (Out1), capture input (CCI1A), or ADC channel 2 input (A2). |
| P1.3/ADC10CLK/A3/VREF-/VEREF- | Multi-function I/O | Provides ADC conversion clock output, ADC channel 3 input, or negative reference voltage (VREF−) for differential measurements. |
| P1.4/SMCLK/A4/VREF+/VEREF+/TCK | Multi-function I/O | Outputs sub-main clock (SMCLK), serves as ADC channel 4 input, supplies positive reference (VREF+), or acts as JTAG test clock (TCK). |
| P1.5/TA0.0/SCLK/A5/TMS | Multi-function I/O | Functions as Timer_A compare output (Out0), USI clock (SCLK), ADC channel 5 input, or JTAG test mode select (TMS). |
| P1.6/TA0.1/SDO/SCL/A6/TDI/TCLK | Multi-function I/O | Supports Timer_A compare output (Out1), USI data output (SDO), I²C clock (SCL), ADC channel 6 input, or JTAG test data input (TDI). |
| P1.7/SDI/SDA/A7/TDO/TDI | Multi-function I/O | Handles USI data input (SDI), I²C data (SDA), ADC channel 7 input, or JTAG test data output (TDO)/input (TDI). |
| RST/NMI/SBWTDIO | Reset & debug | Active-low reset input, non-maskable interrupt source, and bidirectional Spy-Bi-Wire debug data I/O. |
| TEST/SBWTCK | Debug interface | Selects JTAG/Spy-Bi-Wire mode; provides test clock input during programming and fuse blowing. |
| XIN/P2.6/TA0.1 | Oscillator & I/O | Crystal oscillator input, general-purpose I/O (P2.6), or Timer_A compare output (Out1); requires external 32.768-kHz crystal for precision timing. |
| XOUT/P2.7 | Oscillator output | Crystal oscillator output; must not be loaded externally when used as oscillator; functions as general-purpose I/O (P2.7) if crystal unused. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low active current | 220 µA at 1 MHz, 2.2 V - enables >10-year battery life in duty-cycled sensor readouts with 1-second wake intervals. |
| Sub-1 µs wake-up time | From LPM4 to active mode in <1 µs using ACLK-triggered interrupts - critical for responsive event-driven systems like tamper detection. |
| Integrated ADC reference | Internal 1.5-V or 2.5-V reference selectable via ADC10CTL0 register - eliminates external reference IC and reduces BOM count. |
| Programmable code protection | Security fuse programmable via Spy-Bi-Wire - prevents unauthorized firmware extraction while allowing field updates. |
| On-chip emulation logic | Spy-Bi-Wire interface with two breakpoints - enables full-speed debugging without dedicated JTAG header or additional pins. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via BLE or Sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Central controller acquiring analog sensor outputs, performing calibration math, managing sleep/wake cycles, and driving serial interface to radio IC. Use Value: 0.1 µA LPM4 current extends CR2032 battery life beyond 3 years; USI handles I²C sensor reads and SPI radio control without CPU overhead. |
Use Scenario: Handheld pulse oximeter measuring SpO₂ and heart rate using photodiode signals. IC Role / Device Role / Timing Role: Analog front-end controller digitizing dual-channel photodiode outputs, applying digital filtering, and updating OLED display. Use Value: 10-bit ADC with autoscan captures synchronized red/IR samples at 200 ksps; internal reference ensures stable measurement accuracy across battery discharge. |
| Smart Energy Metering | Industrial Control Panel |
Use Scenario: DIN-rail mounted meter logging voltage/current harmonics and communicating via RS-485. IC Role / Device Role / Timing Role: Signal conditioner and communications co-processor handling ADC oversampling, FFT preprocessing, and UART-to-RS485 translation. Use Value: Timer_A2 generates precise 50/60 Hz sampling triggers; 1 kB Flash stores calibration coefficients and Modbus stack for secure remote firmware updates. |
Use Scenario: Local HMI panel monitoring machine status via analog pressure/temperature inputs and controlling relays. IC Role / Device Role / Timing Role: Real-time I/O manager reading analog sensors, debouncing pushbuttons, driving LED indicators, and polling CAN bus via external transceiver. Use Value: Eight ADC channels (A0–A7) support simultaneous multi-sensor acquisition; five low-power modes reduce thermal load in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2231IN14 | 2 kB Flash, 128 B RAM, identical peripherals and pinout; adds second ADC channel (A8/A9) and higher Flash endurance. | Required where firmware size exceeds 1 kB or dual-voltage rail monitoring (e.g., VBAT + VDD) is needed. | Select when future firmware expansion or additional analog inputs justify higher cost and same footprint. |
| MSP430G2121IN14 | No ADC10 module; retains Timer_A2, USI, and low-power modes but lacks analog conversion capability. | Suitable for digital-only control tasks such as LED sequencing, relay timing, or I²C bus arbitration without sensing. | Choose for pure digital logic replacement where analog acquisition is unnecessary and BOM cost reduction is critical. |
Compared with MSP430G2131IN14, MSP430G2231IN14 offers scalable Flash for complex algorithms while maintaining pin compatibility, whereas MSP430G2121IN14 removes ADC functionality entirely - making it a lower-cost option only when analog sensing is omitted from the system architecture.
Availability
MSP430G2131IN14 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart energy meters, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant through-hole microcontrollers.
Supply support for MSP430G2131IN14 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 MSP430G2xx family was engineered for ultra-low-power mixed-signal applications in battery-constrained environments - emphasizing rapid wake-up, integrated analog peripherals, and minimal active/sleep current across extended temperature ranges.
FAQ
What is the maximum operating frequency of the MSP430G2131IN14?
The MSP430G2131IN14 supports a maximum MCLK frequency of 16 MHz at VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC = 1.8 V. The DCO is factory-calibrated for 1 MHz, 8 MHz, and 12 MHz; 16 MHz operation requires user calibration. All timing specifications assume 50% ±10% duty cycle and proper decoupling per SLAS694J Section 6.2.
Does the MSP430G2131IN14 support hardware UART?
No, the MSP430G2131IN14 does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) module that supports only synchronous protocols - specifically SPI and I²C. UART functionality must be implemented in software using Timer_A and GPIO pins, or an external UART-to-SPI bridge IC must be used for asynchronous serial communication.
How many ADC input channels does the MSP430G2131IN14 have?
The MSP430G2131IN14 has eight ADC10 analog input channels (A0 through A7), accessible via P1.0–P1.5 and P1.7–P1.4 as listed in Table 2 of SLAS694J. Channel mapping is fixed per pin; no analog multiplexer reconfiguration beyond autoscan sequence order is supported. The ADC10 module is exclusive to G2x31 variants and absent in G2x21 devices.
What debug interface does the MSP430G2131IN14 use?
The MSP430G2131IN14 uses the two-wire Spy-Bi-Wire (SBW) interface via RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11) for programming and debugging. This replaces standard 4-wire JTAG and requires TI's MSP-FET or compatible debuggers. SBW supports full-speed execution, breakpoints, and flash programming without external voltage injection.
Is the MSP430G2131IN14 pin-compatible with other packages in the G2x31 family?
Yes, the MSP430G2131IN14 (14-pin PDIP) shares identical pin functions and signal assignments with the MSP430G2131IPW14 (14-pin TSSOP) and MSP430G2131IRSA16 (16-pin QFN), as confirmed in Table 1 and pinout diagrams of SLAS694J. However, the QFN variant has two additional NC pins (15–16), and thermal/mechanical design rules differ significantly between through-hole and surface-mount packages.
MSP430G2131IN14 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- MSP430G2xx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 10
- Program Memory Size:
- 1KB (1K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MSP430G2131IN14 FAQ
1.How can I place an order for MSP430G2131IN14 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2131IN14 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 MSP430G2131IN14 reliable?
The price and inventory of MSP430G2131IN14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2131IN14 is usually 5 days.
3.What payment methods are accepted for MSP430G2131IN14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2131IN14 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2131IN14?
MSP430G2131IN14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2131IN14 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 MSP430G2131IN14?
For technical support, including MSP430G2131IN14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2131IN14 requirements.
6.How does Aetrix verify that MSP430G2131IN14 is sourced from the original manufacturer or authorized distributors?
All MSP430G2131IN14 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 MSP430G2131IN14 meets industry standards.
7.What is the process for return or replacement of MSP430G2131IN14?
All MSP430G2131IN14 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2131IN14, 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 MSP430G2131IN14 part is unused and in its original packaging.
Return procedure for MSP430G2131IN14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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