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Texas Instruments MSP430F2491TPM
- Part No.:
- MSP430F2491TPM
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430F2491TPM.pdf
- Description:
- IC MCU 16BIT 60KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
MSP430F2491TPM from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 60KB+256B flash memory, 2KB RAM, a 16-bit Timer_B with seven capture/compare registers and shadow registers, dual USCI modules (UART/I²C/SPI), and on-chip comparator - designed for battery-powered sensor nodes and portable instrumentation requiring sub-1µs wake-up and <0.1 µA off-mode retention.
For engineers reviewing the MSP430F2491TPM datasheet, MSP430F2491TPM pinout, MSP430F2491TPM application, or MSP430F2491TPM equivalent, key selection criteria include its ADC12 omission (vs. F249), 64-pin QFP package compatibility, JTAG debug support via TCK/TMS/TDI/TDO, and supply-voltage supervision with programmable brownout detection across 1.8 V–3.6 V operation.
Technical Context
The MSP430F2491TPM implements a calibrated DCO enabling wake-up from standby in under 1 µs, paired with five low-power modes optimized for extended battery life. Its architecture integrates a 16-bit CPU with constant generators and hardware multiplier (MPY/MPYS/MAC/MACS) to maximize code efficiency in measurement-critical firmware.
Unlike the MSP430F249, the F2491 variant excludes the ADC12 module but retains full Timer_B7 functionality, dual USCI_A/USCI_B interfaces (including IrDA encoding), and identical 64-pin PM package pinout - making it suitable for timing- and communication-intensive applications where analog conversion is handled externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 62.5-ns instruction cycle, constant generators, and hardware multiplier for efficient signal processing |
| Memory | 60KB+256B flash + 2KB RAM - sufficient for complex sensor fusion algorithms with bootloader and parameter storage |
| Power Modes | Active (270 µA @ 1 MHz, 2.2 V), Standby (0.3 µA), Off with RAM retention (0.1 µA) - enables multi-year coin-cell operation |
| Clock System | Digital-controlled oscillator (DCO) calibrated to ±1% at four frequencies up to 16 MHz; supports XT1 (32 kHz), XT2 (up to 16 MHz), and external resistor tuning |
| Peripherals | Dual USCI modules (A0/A1, B0/B1), 16-bit Timer_A3, 16-bit Timer_B7 with shadow registers, comparator, SVS/SVM, WDT+, and JTAG/EEM debug |
| Supply Range | 1.8 V to 3.6 V - compatible with single Li-ion, two AA, or three NiMH cells without regulation overhead |
Pinout & Package
64-pin Plastic Quad Flat Package (QFP, PM), 10 mm × 10 mm, 0.5 mm pitch, RoHS-compliant. Thermal pad not present; standard PCB layout with exposed copper not required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt Input | Hardware reset trigger and NMI source; also initiates bootstrap loader when held during power-up |
| TCK/TMS/TDI/TDO | JTAG Test Interface | Full boundary-scan and emulation support via MSP-FET430UIF or MSP-FET430U64; enables in-system programming and real-time debugging |
| P1.x–P6.x | General-Purpose I/O Ports | 48 total GPIO pins with interrupt capability, configurable pull-up/down, and peripheral multiplexing (e.g., P1.1/TA0, P3.6/UCA1TXD) |
| AVCC/AVSS | Analog Power Supply | Separate analog domain (pins 64/62) isolates ADC reference path - though ADC12 is absent in F2491, these pins remain bonded and must be decoupled |
| XIN/XOUT | Low-Frequency Crystal Interface | Supports 32.768 kHz watch crystal for RTC or ACLK generation; internal load capacitors enabled by software |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 µA off-mode with RAM retention enables decade-scale shelf life in sealed sensor deployments |
| Dual USCI modules | Independent UART/I²C/SPI channels (A0/A1/B0/B1) allow concurrent host comms and sensor bus control without software arbitration |
| Timer_B7 with shadow registers | Seven compare/capture channels plus double-buffered registers prevent race conditions during PWM updates in motor or lighting control |
| Programmable supply monitoring | SVS/SVM with user-selectable threshold ensures deterministic reset behavior across voltage droop events in industrial environments |
| On-chip comparator | Comparator_A with internal references and hysteresis supports battery voltage monitoring or zero-crossing detection without external components |
Applications
| Wireless Sensor Node | Industrial Data Logger |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting via UART-to-LoRa module every 5 minutes. IC Role / Device Role / Timing Role: Main controller managing sleep/wake cycles, sensor polling, data formatting, and serial handoff to radio IC. Use Value: Sub-1 µs wake-up and 0.1 µA off-mode extend CR2032 life beyond 3 years; dual USCI allows simultaneous sensor I²C reads and radio UART writes. |
Use Scenario: DIN-rail mounted environmental monitor logging pressure, flow, and valve status to SD card over 24-hour cycles. IC Role / Device Role / Timing Role: Central timing and interface manager coordinating SPI-based SD card writes, analog front-end sampling (external ADC), and RS-485 Modbus responses. Use Value: Timer_B7 provides precise 1-ms system tick and independent PWM for LED indicators; SVS prevents corruption during brownout on unregulated 24 V DC input. |
| Smart Meter Communication Module | Portable Handheld Tester |
Use Scenario: PLC or RF communication add-on board for electricity meters, handling protocol translation between metrology ASIC and HAN network. IC Role / Device Role / Timing Role: Protocol bridge executing DLMS/COSEM parsing and generating I²C commands to meter SoC while maintaining secure UART link to concentrator. Use Value: Dual USCI_B modules enable concurrent I²C master (to metrology IC) and I²C slave (for configuration) roles; hardware multiplier accelerates CRC-32 computation. |
Use Scenario: Field technician tool measuring continuity, diode drop, and capacitance using external analog front-end and LCD display. IC Role / Device Role / Timing Role: Real-time UI controller with button scan, LCD refresh, and serial command parsing - no ADC required as sensing is analog-domain only. Use Value: Comparator_A replaces external op-amp comparators for threshold detection; 60KB flash accommodates multilingual UI assets and calibration tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F249TPM | Includes 12-bit ADC12 with 8-channel input and sample-and-hold; otherwise identical flash/RAM/peripherals/pinout | Required when on-chip analog acquisition is needed (e.g., direct thermistor or current-sense reading) | Select F249TPM if ADC12 integration reduces BOM cost and simplifies layout; F2491TPM preferred when external ADC or comparator-only sensing suffices. |
| MSP430F2410TPM | 56KB+256B flash, 4KB RAM, same peripherals and package; lacks USCI_A1 and USCI_B1 modules present in F2491 | Suitable for simpler UART+I²C systems without need for dual independent serial buses | Choose F2410TPM for cost-sensitive designs with lower memory and peripheral requirements; F2491TPM delivers higher serial throughput and flexibility. |
Compared with MSP430F249TPM, the MSP430F2491TPM trades ADC12 capability for marginally lower cost and identical low-power performance, while offering greater serial interface concurrency than MSP430F2410TPM - making it optimal for communication-centric embedded controllers where analog conversion is delegated externally.
Availability
MSP430F2491TPM is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial data loggers, and smart meter communication modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant 64-pin QFP packaging.
Supply support for MSP430F2491TPM 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 expertise in ultra-low-power design.
The MSP430F2491TPM belongs to TI's MSP430F2xx ultra-low-power MCU family, engineered specifically for battery-operated measurement and control applications demanding nanowatt-level active and standby power consumption.
FAQ
Does the MSP430F2491TPM include an integrated ADC?
No, the MSP430F2491TPM does not include the ADC12 module. It is part of the "F24x1" variant family explicitly defined in the SLAS547I datasheet as identical to the F24x series except for the omission of ADC12. The MSP430F2491TPM retains all other peripherals including Timer_B7, dual USCI, comparator, and flash/RAM - making it ideal for applications where analog conversion is performed externally or not required.
What is the package type and pin count of the MSP430F2491TPM?
The MSP430F2491TPM is supplied in a 64-pin Plastic Quad Flat Package (QFP), designated "PM" in TI's ordering nomenclature. This package matches the pinout of the MSP430F249TPM and MSP430F2410TPM, enabling direct PCB footprint reuse across the F24x/F24x1 family. The 0.5 mm pitch and 10 mm × 10 mm body simplify assembly and inspection.
Can the MSP430F2491TPM be programmed and debugged using standard JTAG tools?
Yes, the MSP430F2491TPM supports full JTAG-based programming and debugging via its dedicated TCK, TMS, TDI, and TDO pins. It is compatible with TI's MSP-FET430UIF (USB) and MSP-FET430U64 (target board) debuggers, as well as third-party tools compliant with the MSP430 JTAG specification. The Embedded Emulation Module (EEM) enables real-time breakpoints, register inspection, and flash programming without requiring special bootloaders.
How does the power consumption of the MSP430F2491TPM compare to similar MCUs in active and low-power modes?
The MSP430F2491TPM achieves 270 µA active current at 1 MHz and 2.2 V, 0.3 µA in standby (VLO), and 0.1 µA in off mode with RAM retention - matching the benchmark ultra-low-power profile of the MSP430F2xx family. These values are measured and specified in the SLAS547I datasheet and reflect actual silicon performance, not typical estimates. No derating or external circuitry is needed to achieve these figures.
What communication interfaces are supported by the MSP430F2491TPM?
The MSP430F2491TPM integrates two Universal Serial Communication Interfaces: USCI_A0 and USCI_A1 (supporting UART, IrDA, and SPI) and USCI_B0 and USCI_B1 (supporting SPI and I²C). This provides four independent serial channels - enabling simultaneous UART host communication, I²C sensor interfacing, SPI display control, and secondary SPI peripheral daisy-chaining without time-slicing or software bit-banging.
MSP430F2491TPM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430F2xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, 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:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F2491TPM FAQ
1.How can I place an order for MSP430F2491TPM through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2491TPM 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 MSP430F2491TPM reliable?
The price and inventory of MSP430F2491TPM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2491TPM is usually 5 days.
3.What payment methods are accepted for MSP430F2491TPM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2491TPM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2491TPM?
MSP430F2491TPM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2491TPM 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 MSP430F2491TPM?
For technical support, including MSP430F2491TPM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2491TPM requirements.
6.How does Aetrix verify that MSP430F2491TPM is sourced from the original manufacturer or authorized distributors?
All MSP430F2491TPM 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 MSP430F2491TPM meets industry standards.
7.What is the process for return or replacement of MSP430F2491TPM?
All MSP430F2491TPM units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2491TPM, 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 MSP430F2491TPM part is unused and in its original packaging.
Return procedure for MSP430F2491TPM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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