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Texas Instruments MSP430F1491IRTDR
- Part No.:
- MSP430F1491IRTDR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSP430F1491IRTDR.pdf
- Description:
- IC MCU 16BIT 60KB FLASH 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,820
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Product details
Overview
MSP430F1491IRTDR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 60KB flash, 2KB RAM, dual USARTs, 12-bit ADC (8-channel), two 16-bit timers (Timer_A3 and Timer_B7), and on-chip comparator. It operates from 1.8 V to 3.6 V and supports five power-saving modes, enabling sub-6 µs wake-up - ideal for battery-powered sensor nodes and portable metering.
For engineers reviewing the MSP430F1491IRTDR datasheet, MSP430F1491IRTDR pinout, MSP430F1491IRTDR application, or MSP430F1491IRTDR equivalent, key selection criteria include its VQFN-64 package, 48 GPIOs, integrated ADC reference, JTAG debug interface, and compatibility with TI's MSP430x1xx toolchain and Code Composer Studio.
Technical Context
The MSP430F1491IRTDR implements a 16-bit CPU with constant generators and hardware multiplier for optimized code density and computational efficiency. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains with support for LFXT1 (32.768 kHz crystal) and XT2 (up to 8 MHz) oscillators.
Peripherals are tightly synchronized via the bus architecture: ADC12 uses ADC12CLK derived from SMCLK or DCO; Timer_B7 provides seven capture/compare registers with shadow registers for glitch-free PWM; USART0/USART1 operate in UART or SPI mode with independent clock sources (UCLK0/UCLK1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125-ns instruction cycle and hardware multiplier |
| Memory | 60KB + 256B flash / 2KB RAM - sufficient for complex sensor fusion algorithms with bootloader space |
| ADC | 12-bit, 8-channel, <10 µs conversion - supports simultaneous sampling of analog sensors without external mux |
| Timers | Timer_A3 (3 CC regs) + Timer_B7 (7 CC regs w/ shadow) - enables multi-channel PWM and precise event timing |
| Communication | Two USARTs (UART/SPI) - allows concurrent serial comms (e.g., sensor UART + host SPI) |
| Power Modes | 5 low-power modes; standby current = 1.6 µA, off-mode RAM retention = 0.1 µA - extends coin-cell life to years |
| Supply Range | 1.8 V to 3.6 V - compatible with single Li-ion, 2×AA, or energy-harvesting sources |
Pinout & Package
VQFN-64 (9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad connected to DVSS. Pinout validated per TI SLAS272H Figure 4-3 and Table 4-2 for MSP430F14x1 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pin 1) | Digital supply input | Primary 1.8–3.6 V rail for core logic and digital I/O banks |
| DVSS (Pin 63) | Digital ground | Reference for all digital signals; must be low-impedance connection to thermal pad |
| AVCC (Pin 64) | Analog supply input | Separate 1.8–3.6 V rail for ADC and comparator; decoupling critical for <12-bit accuracy |
| AVSS (Pin 62) | Analog ground | Isolated ground return for analog peripherals; star-point connection recommended |
| P1.0/TACLK – P6.7/A7 | GPIO / peripheral multiplex | 48 configurable I/O pins with interrupt capability; P6.0–P6.7 serve as ADC inputs A0–A7 |
| RST/NMI (Pin 58) | Reset & NMI input | Active-low reset with non-maskable interrupt function; also triggers BSL entry |
| TCK/TMS/TDO/TDI (Pins 57,56,54,55) | JTAG debug interface | Full boundary-scan and flash programming support; no external voltage required |
| XT2IN/XT2OUT (Pins 53,52) | High-frequency crystal interface | Supports up to 8 MHz standard crystals for precise system timing or UART baud rate generation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | Active mode: 280 µA @ 1 MHz / 2.2 V; enables >10-year battery life in sleep-dominated applications |
| Dual USART with flexible clocking | USART0 and USART1 each support independent UART/SPI modes with dedicated UCLK0/UCLK1 - eliminates need for external clock dividers |
| ADC with internal reference | Integrated 2.5 V reference and sample-and-hold - removes external reference IC and reduces BOM cost |
| Hardware multiplier | 16×16-bit multiply in one cycle - accelerates filtering, FFT, and calibration math in firmware |
| On-chip comparator | Comparator_A with programmable hysteresis - replaces discrete comparator for threshold detection and wake-on-event |
Applications
| Smart Utility Meter | Industrial Sensor Node |
|---|---|
Use Scenario: Two-way communication meter reading with tamper detection and real-time load monitoring. IC Role / Device Role / Timing Role: Main controller managing metrology ADC sampling, RF/PLC modem interface, and secure firmware updates. Use Value: Low active current and fast wake-up enable burst-mode operation - 99.9% duty-cycled sleep conserves battery while maintaining time-sync via ACLK/LFXT1. | Use Scenario: Wireless vibration/temperature node in predictive maintenance systems deployed in hazardous areas. IC Role / Device Role / Timing Role: Signal acquisition hub performing analog front-end conditioning, FFT preprocessing, and SPI-to-LoRaWAN gateway handoff. Use Value: Integrated hardware multiplier and Timer_B7 shadow registers allow deterministic real-time FFT windowing and PWM-controlled sensor excitation without CPU overhead. |
| Portable Gas Detector | Medical Patient Monitor |
Use Scenario: Handheld electrochemical gas analyzer requiring low-noise analog sensing and audible alarm feedback. IC Role / Device Role / Timing Role: Analog signal processor interfacing with 4-electrode sensor array, driving buzzer via Timer_A PWM, and logging data to flash. Use Value: On-chip 12-bit ADC with internal reference and autoscan eliminates external precision references - improves measurement repeatability across temperature. | Use Scenario: Battery-powered wearable ECG/SpO₂ monitor with clinical-grade analog front-end and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Primary MCU handling analog acquisition, digital filtering, and BLE packet framing via USART0 UART. Use Value: Five power modes and sub-6 µs wake-up from LPM3 allow synchronous sampling at 250 Hz while maintaining average current <2 µA - extends runtime beyond 7 days on CR2032. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F149IPM | LQFP-64 package (10×10 mm); identical flash/RAM/peripherals; higher thermal resistance (θJA = 46°C/W vs. 36°C/W) | Better suited for prototyping and manual soldering; less optimal for space-constrained PCBs | Select when board layout allows larger footprint and thermal management is less critical |
| MSP430F1481IRTDR | 48KB flash (vs. 60KB); otherwise identical pinout, package, and peripheral set | Suitable where firmware size ≤48KB; lower cost for simpler sensor firmware without OTA update space | Choose when application firmware fits within 48KB and cost sensitivity outweighs future scalability |
Compared with MSP430F149IPM, the MSP430F1491IRTDR offers superior thermal performance in compact layouts; versus MSP430F1481IRTDR, it provides 12KB additional flash for bootloader, security stack, and field-upgradeable features - critical for certified medical or industrial deployments.
Availability
MSP430F1491IRTDR is available at Aetrix Electronics and suitable for smart metering, industrial IoT edge nodes, portable diagnostics, and battery-powered environmental monitoring requiring stable component supply and long-term manufacturability.
Supply support for MSP430F1491IRTDR 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 reliability, longevity, and industrial-grade qualification.
The MSP430F1491IRTDR belongs to the MSP430x1xx ultra-low-power MCU family, designed specifically for extended-battery-life applications in metering, sensing, and portable instrumentation where energy efficiency and mixed-signal integration are paramount.
FAQ
What is the maximum operating frequency of the MSP430F1491IRTDR?
The MSP430F1491IRTDR does not have a fixed maximum CPU frequency; its digitally controlled oscillator (DCO) is calibrated to support up to 8 MHz operation using the XT2 oscillator (standard crystal up to 8 MHz). The 125-ns instruction cycle corresponds to 8 MHz execution speed under optimal conditions, confirmed in Section 5.18 of the SLAS272H datasheet.
Does the MSP430F1491IRTDR support in-system programming without external voltage?
Yes, the MSP430F1491IRTDR supports serial onboard programming via the built-in bootloader (BSL) with no external programming voltage required. Programming is performed through UART or SPI using standard 1.8–3.6 V supply, and code protection is enforced by a security fuse - fully documented in Section 6.5 of the SLAS272H datasheet.
How many ADC channels does the MSP430F1491IRTDR have, and what input ranges are supported?
The MSP430F1491IRTDR integrates a 12-bit ADC12 module with eight external input channels (A0–A7 mapped to P6.0–P6.7). It supports both internal (2.5 V) and external reference voltages, with input ranges selectable as AVCC/AVSS, VREF+/VREF−, or VeREF+/VeREF− - detailed in Sections 5.23–5.25 of SLAS272H.
Is the MSP430F1491IRTDR pin-compatible with other devices in the MSP430F14x1 family?
Yes, the MSP430F1491IRTDR shares identical pinout and package (VQFN-64) with MSP430F1481IRTDR and MSP430F1471IRTDR, as confirmed in Figure 4-3 and Table 3-1 of SLAS272H. All three support the same peripheral mapping, I/O functions, and JTAG interface - enabling direct substitution where flash/RAM requirements align.
What debug interfaces are supported by the MSP430F1491IRTDR?
The MSP430F1491IRTDR supports full JTAG emulation via TCK, TMS, TDO/TDI, and TDI/TCLK pins (Pins 57, 56, 54, 55), enabling real-time debugging, flash programming, and boundary-scan testing. It also supports Spy-Bi-Wire (2-wire JTAG) mode for reduced pin count - both methods are natively supported by TI's MSP-FET and Code Composer Studio.
MSP430F1491IRTDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 60KB (60K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K 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:
MSP430F1491IRTDR FAQ
1.How can I place an order for MSP430F1491IRTDR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1491IRTDR 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 MSP430F1491IRTDR reliable?
The price and inventory of MSP430F1491IRTDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1491IRTDR is usually 5 days.
3.What payment methods are accepted for MSP430F1491IRTDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1491IRTDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1491IRTDR?
MSP430F1491IRTDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1491IRTDR 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 MSP430F1491IRTDR?
For technical support, including MSP430F1491IRTDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1491IRTDR requirements.
6.How does Aetrix verify that MSP430F1491IRTDR is sourced from the original manufacturer or authorized distributors?
All MSP430F1491IRTDR 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 MSP430F1491IRTDR meets industry standards.
7.What is the process for return or replacement of MSP430F1491IRTDR?
All MSP430F1491IRTDR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1491IRTDR, 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 MSP430F1491IRTDR part is unused and in its original packaging.
Return procedure for MSP430F1491IRTDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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