Texas Instruments MSP430F2491TPMR

Overview

MSP430F2491TPMR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 60KB+256B flash memory, 2KB RAM, a 16-bit Timer_B with seven capture/compare registers and shadow registers, four USCI modules (two UART/IrDA/SPI, two SPI/I²C), and on-chip comparator. It operates across 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430F2491TPMR datasheet, MSP430F2491TPMR pinout, MSP430F2491TPMR application, or MSP430F2491TPMR equivalent, key selection considerations include its ADC12 absence (vs. MSP430F249), 64-pin QFP package, JTAG debug interface, and support for dual USCI_A/USCI_B peripherals in low-power embedded control.

Technical Context

The MSP430F2491TPMR implements a 16-bit RISC CPU with constant generators and a calibrated DCO enabling sub-1-µs wake-up from standby mode. Its basic clock system integrates internal LF oscillator, 32-kHz crystal support (XT1), and optional high-frequency XT2 up to 16 MHz.

It features two independent 16-bit timers (Timer_A3 and Timer_B7), dual USCI_A (UART/IrDA/SPI) and dual USCI_B (SPI/I²C) modules, and a Comparator_A+ module - but excludes the ADC12 peripheral found in non-"1" variants like MSP430F249.

Key Specifications

Pinout & Package

Package: 64-pin plastic quad flat pack (QFP, PM package), RoHS-compliant, 10 mm × 10 mm body, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.

Compared with MSP430F249TPMR, the MSP430F2491TPMR removes ADC12 to reduce dynamic power and bill-of-materials cost, while matching all timing, communication, and control capabilities; versus MSP430F2481TPMR, it provides 12KB more flash for larger protocol stacks or firmware-over-the-air updates.

Availability

MSP430F2491TPMR is available at Aetrix Electronics and suitable for smart sensor nodes, industrial serial gateways, and portable metering interfaces requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade temperature range (–40°C to 105°C).

Supply support for MSP430F2491TPMR 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 microcontroller innovation.

The MSP430F2491TPMR belongs to the MSP430F2xx ultra-low-power MCU family, designed specifically for energy-constrained applications demanding extended battery life, rapid wake-up response, and integrated mixed-signal control without ADC overhead.

FAQ

Does the MSP430F2491TPMR include an analog-to-digital converter?

No, the MSP430F2491TPMR does not include the ADC12 module. It is part of the "F24x1" variant series explicitly defined in the SLAS547I datasheet as identical to the F24x family except for ADC12 omission. The MSP430F2491TPMR retains full Timer_A, Timer_B, USCI, and Comparator_A+ functionality - making it ideal for applications requiring precision analog comparison but no on-chip digitization. For ADC capability, consider MSP430F249TPMR instead.

What package type is used for the MSP430F2491TPMR?

The MSP430F2491TPMR uses a 64-pin plastic quad flat pack (QFP) package, designated "PM" in TI's ordering nomenclature. This surface-mount package measures 10 mm × 10 mm with 0.5 mm lead pitch and is RoHS-compliant. It is pin-compatible with other MSP430F24x/24x1 devices in the PM package, including MSP430F249TPMR and MSP430F2481TPMR, enabling layout reuse across variants.

Can the MSP430F2491TPMR support both UART and I²C simultaneously?

Yes, the MSP430F2491TPMR supports simultaneous UART and I²C operation using its four USCI modules: USCI_A0 and USCI_A1 can each be configured as UART (with IrDA and auto-baudrate detection), while USCI_B0 and USCI_B1 operate independently as I²C masters or slaves. This allows concurrent communication with UART-based host interfaces and multiple I²C sensors - confirmed by functional block diagrams and terminal function tables in SLAS547I Rev. December 2012.

What debug interface does the MSP430F2491TPMR provide?

The MSP430F2491TPMR includes a standard 4-wire JTAG interface (TCK, TMS, TDI, TDO) on pins 57, 56, 55, and 54 respectively, supporting full-speed emulation, flash programming, and real-time breakpoint debugging. It is compatible with TI's MSP-FET430UIF and MSP-FET430U64 development tools. No SWD or cJTAG is supported - JTAG is the sole debug interface per the device pinout and functional documentation.

Is the MSP430F2491TPMR qualified for industrial temperature range?

Yes, the MSP430F2491TPMR is rated for operation from –40°C to 105°C, as specified in Table 1 ("Available Options") of the SLAS547I datasheet. This industrial temperature grade is standard for all PM- and RGC-packaged devices in the MSP430F24x(1) family, including MSP430F2491TPMR, and is validated across electrical parameters such as supply current, timing, and I/O drive strength within that range.