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Texas Instruments MSP430F5131IDAR
- Part No.:
- MSP430F5131IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430F5131IDAR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
MSP430F5131IDAR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 8 KB Flash, 1 KB RAM, dual 16-bit Timer_D modules (TD0/TD1), USCI_A0 (UART/IrDA/SPI) and USCI_B0 (I²C/SPI), 16-channel comparator, and 5-V-tolerant I/Os in a 38-pin TSSOP package. It operates from 1.8 V to 3.6 V and supports sub-1 µA standby current (LPM3), making it suitable for battery-powered sensor nodes and energy-harvesting systems.
For engineers reviewing the MSP430F5131IDAR datasheet, MSP430F5131IDAR pinout, MSP430F5131IDAR application, or MSP430F5131IDAR equivalent, key selection criteria include its LPM3 current (1.1 µA @ 3 V), 38-pin TSSOP footprint, absence of integrated ADC (unlike F51x2 variants), and compatibility with TI's MSP430F51x1 family toolchain and firmware libraries.
Technical Context
The MSP430F5131IDAR implements the CPUXV2 core with 16-bit registers and constant generators for optimized code density. Its unified clock system integrates DCO-based FLL stabilization, low-frequency VLO and REFO internal sources, and support for external 32-kHz and up to 25-MHz crystals via XT1.
It belongs to the MSP430F51x1 subfamily-distinguished from F51x2 by omission of the 10-bit ADC10_A module-and retains full peripheral complement including 3-channel DMA, hardware multiplier, CRC16 engine, and programmable LDO with core voltage regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2 with 40-ns instruction cycle; enables deterministic real-time control in compact firmware. |
| Memory | 8 KB Flash / 1 KB RAM; sufficient for sensor fusion algorithms and BLE stack coexistence in constrained-edge devices. |
| Low-Power Modes | LPM3 (1.1 µA @ 3 V), LPM4 (0.9 µA RAM retention), LPM4.5 (0.25 µA shutdown); extends coin-cell life beyond 10 years in periodic wake-up applications. |
| Timers | Two 16-bit Timer_D modules (TD0/TD1), each with three capture/compare registers and high-resolution mode; supports precise PWM generation and time-of-flight measurement. |
| Communication | USCI_A0 (UART/IrDA/SPI) + USCI_B0 (I²C/SPI); enables dual-bus connectivity to sensors and host controllers without external level shifters. |
| I/O Capability | Up to 29 digital I/O pins, 12 of which are 5-V tolerant with 20-mA drive strength; simplifies interface to legacy industrial peripherals and LED drivers. |
| Package | 38-pin TSSOP (DA package, 12.5 mm × 6.2 mm); compatible with standard SMT reflow and accessible for manual prototyping and repair. |
Pinout & Package
Package: 38-pin TSSOP (DA), body size 12.5 mm × 6.2 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0–P1.5 | General-purpose I/O with USCI_A0/USCI_B0 secondary functions | Configurable as UART TX/RX, SPI master/slave, or I²C SDA/SCL - eliminates need for external bus translators. |
| P2.0–P2.7 | Timer_D and TEC fault/clear I/O | Direct connection to TD0/TD1 compare outputs and fault inputs enables hardware-synchronized motor gate control or overcurrent protection. |
| P3.0–P3.7 | Timer_A clock input, comparator output, TD0/TD1 signals | Supports cascaded timing chains and analog comparator event triggering without CPU intervention. |
| PJ.0–PJ.3 | SMCLK/MCLK/ACLK/ADC10CLK outputs | Provides traceable clock domains for debug, synchronization, and low-jitter peripheral timing - PJ.2 and PJ.3 also serve as JTAG test pins. |
| RST/NMI/SBWTDIO | Reset, nonmaskable interrupt, Spy-Bi-Wire I/O | Single-pin 4-wire debug interface reduces PCB routing complexity and supports in-system programming without dedicated JTAG header. |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated LDO | Programmable core voltage (1.8–3.6 V) enables dynamic power scaling and stable operation across battery discharge curves. |
| Reconfigurable port mapping | Per-pin remapping of USCI, Timer, and comparator functions allows flexible PCB layout and reuse of firmware across pin-compatible variants. |
| Hardware CRC16 engine | Offloads checksum calculation from CPU during firmware updates or sensor data packet validation - reduces latency and power per transaction. |
| Ultra-fast wake-up | <5 µs exit from LPM3 to active mode ensures responsive reaction to external interrupts (e.g., motion detection or RF packet arrival). |
| 3-channel DMA | Enables autonomous data movement between peripherals (e.g., USCI → RAM) without CPU cycles - critical for continuous sensor logging at low power. |
Applications
| Wireless Sensor Node | Industrial Thermostat |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data every 2 minutes via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Main controller managing sensor polling, data formatting, low-power sleep/wake scheduling, and SPI communication with RF IC. Use Value: LPM3 current of 1.1 µA extends CR2032 battery life to >5 years; 38-pin TSSOP allows compact two-layer PCB design with minimal decoupling. | Use Scenario: Wall-mounted HVAC controller with local display, push-button interface, and wired RS-485 backhaul. IC Role / Device Role / Timing Role: System-on-chip handling analog sensor conditioning (via external ADC), button debouncing, display refresh, and half-duplex RS-485 framing via USCI_B0. Use Value: 5-V-tolerant I/Os directly interface with RS-485 transceivers and tactile switches; programmable LDO maintains stable core voltage despite 12-V supply ripple. |
| LED Lighting Controller | Digital Power Supply Monitor |
Use Scenario: Constant-current LED driver with dimming, thermal foldback, and DALI communication. IC Role / Device Role / Timing Role: Real-time PWM generator (using TD0/TD1), DALI physical layer controller (via USCI_A0 UART), and analog monitoring front-end. Use Value: Dual Timer_D modules provide independent 16-bit PWM channels for RGB mixing; 20-mA drive strength directly drives DALI bus without external transistor. | Use Scenario: Secondary-side monitor for isolated DC-DC converter, measuring output voltage/current and reporting faults via I²C. IC Role / Device Role / Timing Role: Fault-detecting supervisor interfacing with external precision ADCs and communicating status to primary controller. Use Value: 16-channel comparator enables simultaneous overvoltage, undervoltage, overcurrent, and thermal threshold detection with zero-latency response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F5132IDAR | Includes 10-bit ADC10_A (9 external + 2 internal channels); otherwise identical Flash/RAM/peripherals/package. | Required when direct on-chip analog sensing (e.g., thermistor, photodiode) is needed without external ADC. | Select MSP430F5132IDAR only if ADC functionality is mandatory; MSP430F5131IDAR offers lower cost and same power/performance where analog inputs are handled externally. |
| MSP430F5151IPR | 16 KB Flash / 2 KB RAM; same peripheral set and LPM3 current; packaged in 40-pin QFN (RSB). | Suitable for designs requiring larger firmware headroom or higher I/O count (31 vs. 29 pins), but demands finer-pitch assembly. | Choose MSP430F5151IPR when firmware complexity exceeds 8 KB or when additional GPIOs are needed; avoid if TSSOP assembly or cost sensitivity is prioritized. |
Compared with MSP430F5132IDAR, the MSP430F5131IDAR saves BOM cost by omitting the ADC while retaining identical low-power performance and timer capability; versus MSP430F5151IPR, it trades Flash capacity and package density for manufacturability and price in space-constrained but firmware-light applications.
Availability
MSP430F5131IDAR is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial thermostats, and LED lighting controllers requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430F5131IDAR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on energy efficiency and reliability.
The MSP430F51x1 product line targets ultra-low-power sensing and control applications where extended battery life, deterministic real-time response, and robust peripheral integration are essential - exemplified by the MSP430F5131IDAR's optimized LPM3 current and reconfigurable I/O architecture.
FAQ
Does the MSP430F5131IDAR include an integrated analog-to-digital converter (ADC)?
No, the MSP430F5131IDAR does not include an integrated ADC. It belongs to the MSP430F51x1 family, which omits the 10-bit ADC10_A module present in the F51x2 variants (e.g., MSP430F5132). Analog signal acquisition requires external ADCs or sensor ICs with digital output. This omission reduces die size and cost while maintaining identical low-power operation and peripheral complement otherwise.
What is the maximum operating frequency of the MSP430F5131IDAR?
The MSP430F5131IDAR supports a maximum system clock (MCLK) frequency of 25 MHz, achievable using the internal digitally controlled oscillator (DCO) with FLL stabilization or an external crystal up to 25 MHz on XT1. The 16-bit RISC CPU executes instructions at 40 ns per cycle at this rate, enabling real-time control loops with sub-microsecond latency.
Which development tools are officially supported for the MSP430F5131IDAR?
Texas Instruments officially supports the MSP430F5131IDAR with the MSP430Ware software library, Code Composer Studio v12+, and the MSP-FET debugger. Hardware evaluation is enabled via the MSP-TS430DA38 target socket board, which mates directly with the 38-pin TSSOP package. No LaunchPad is available specifically for DA-package devices, but firmware developed for MSP430F5131IDAR runs unchanged on pin-compatible QFN variants.
Can the MSP430F5131IDAR operate from a single 3.3-V supply?
Yes, the MSP430F5131IDAR operates across 1.8 V to 3.6 V, fully supporting 3.3-V nominal supply. Its integrated LDO regulates the core voltage independently, and all 5-V-tolerant I/Os function correctly at 3.3 V with 20-mA drive strength. This allows direct interfacing with 3.3-V logic families and simplifies power design in mixed-voltage systems.
Is the MSP430F5131IDAR pin-compatible with other members of the MSP430F51x1 family?
Yes, the MSP430F5131IDAR shares identical pinout and electrical characteristics with other 38-pin TSSOP (DA package) MSP430F51x1 devices, including MSP430F5151IDAR and MSP430F5171IDAR. Firmware and PCB layouts are interchangeable across these variants; differentiation lies solely in Flash (8 KB/16 KB/32 KB) and RAM (1 KB/2 KB/2 KB) sizes - no hardware modifications are required for migration.
MSP430F5131IDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 38-TSSOP (0.240", 6.10mm Width)
- Series:
- MSP430F5xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 29
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F5131IDAR FAQ
1.How can I place an order for MSP430F5131IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F5131IDAR 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 MSP430F5131IDAR reliable?
The price and inventory of MSP430F5131IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F5131IDAR is usually 5 days.
3.What payment methods are accepted for MSP430F5131IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F5131IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F5131IDAR?
MSP430F5131IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F5131IDAR 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 MSP430F5131IDAR?
For technical support, including MSP430F5131IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F5131IDAR requirements.
6.How does Aetrix verify that MSP430F5131IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430F5131IDAR 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 MSP430F5131IDAR meets industry standards.
7.What is the process for return or replacement of MSP430F5131IDAR?
All MSP430F5131IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F5131IDAR, 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 MSP430F5131IDAR part is unused and in its original packaging.
Return procedure for MSP430F5131IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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