Texas Instruments MSP430F149IPMR

Overview

MSP430F149IPMR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 60KB flash, 2KB RAM, dual USARTs, a 12-bit ADC with 8 channels and internal reference, Timer_B7 with seven capture/compare registers, and hardware multiplier - designed for battery-powered sensor systems and portable instrumentation requiring sub-µA standby current and <6 µs wake-up.

For engineers reviewing the MSP430F149IPMR datasheet, MSP430F149IPMR pinout, MSP430F149IPMR application, or MSP430F149IPMR equivalent, key selection criteria include its 64-pin LQFP package, dual UART/SPI capability, integrated ADC with autoscan, five low-power modes, and JTAG debug support - all critical for energy-constrained embedded measurement designs.

Technical Context

The MSP430F149IPMR implements a 16-bit CPU with constant generators and 125-ns instruction cycle time, paired with a digitally controlled oscillator (DCO) enabling sub-6 µs transition from LPM3 to active mode. Its memory-mapped peripherals include two independent 16-bit timers (Timer_A3 and Timer_B7), each supporting PWM, capture, and compare functions with shadow registers for glitch-free updates.

It integrates dual USART modules (USART0 and USART1) configurable as asynchronous UART or synchronous SPI, plus an on-chip comparator and hardware multiplier. The ADC12 supports both internal and external references, 8-channel autoscan, and conversion times under 10 µs - all operating across a 1.8 V–3.6 V supply range with AVCC/DVCC separation for analog-digital domain isolation.

Key Specifications

Pinout & Package

LQFP-64 (10 mm × 10 mm) package with exposed thermal pad (connected to DVSS), 48 general-purpose I/O pins, and dedicated analog/digital supply rails (AVCC/AVSS, DVCC/DVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F149IPMR, the IPAG variant offers identical functionality in a TQFP package for legacy assembly lines, while the IRTD variant delivers superior thermal dissipation and miniaturization in VQFN - both retain full software and peripheral compatibility but require package-specific layout and assembly validation.

Availability

MSP430F149IPMR is available at Aetrix Electronics and suitable for smart metering, portable medical devices, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.

Supply support for MSP430F149IPMR 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 MSP430F149IPMR belongs to TI's MSP430F1xx ultra-low-power MCU family, engineered specifically for battery-operated measurement and sensing applications where energy efficiency, integrated analog peripherals, and robust debug infrastructure are essential.

FAQ

What is the maximum operating frequency of the MSP430F149IPMR?

The MSP430F149IPMR does not have a fixed maximum clock frequency; it uses a digitally controlled oscillator (DCO) calibrated to operate up to approximately 8 MHz under typical conditions. Its 16-bit RISC architecture achieves a 125-ns instruction cycle time, meaning effective throughput scales with DCO tuning and system clock configuration. The MSP430F149IPMR datasheet specifies DCO frequency ranges across supply voltage and temperature - e.g., 1–8 MHz at 2.2–3.6 V - with accuracy dependent on calibration and external resistor (ROSC) selection.

Does the MSP430F149IPMR support in-system programming without external high voltage?

Yes, the MSP430F149IPMR supports in-system programming via its built-in bootloader (BSL), which operates through UART or SPI using only the standard 1.8–3.6 V supply - no external programming voltage is required. The BSL is activated via specific pin states on reset and allows full flash memory erase, program, and verify operations. Additionally, the MSP430F149IPMR supports standard JTAG programming for development and production, with fuse-based security to prevent unauthorized code readout.

How many analog input channels does the MSP430F149IPMR ADC support?

The MSP430F149IPMR integrates the ADC12 module, which supports up to 8 analog input channels (A0–A7) mapped to pins P6.0 through P6.7. These channels can be configured for single-ended or differential sampling, with selectable reference sources (internal 2.5 V or external). The ADC12 also features autoscan mode, allowing sequential conversion of multiple channels without CPU intervention - a key capability confirmed in the MSP430F149IPMR device comparison table and functional block diagram.

What are the key differences between MSP430F149IPMR and MSP430F1491IRTD?

The MSP430F149IPMR and MSP430F1491IRTD share identical core functionality - 60KB flash, 2KB RAM, dual USARTs, ADC12, Timer_B7, and ultra-low-power modes - but differ in package: MSP430F149IPMR uses LQFP-64 (10 mm × 10 mm), while MSP430F1491IRTD uses VQFN-64 (9 mm × 9 mm) with wettable flanks. The IRTD variant offers better thermal performance and smaller footprint but requires different PCB layout, stencil design, and solder inspection due to its leadless construction.

Can the MSP430F149IPMR operate from a single 1.8-V supply?

Yes, the MSP430F149IPMR is fully specified to operate across a supply range of 1.8 V to 3.6 V, making it compatible with single-cell lithium chemistries and low-voltage industrial rails. At 1.8 V, it maintains full functionality including 12-bit ADC operation (with reduced reference headroom), UART communication (at lower baud rates), and all five low-power modes. The datasheet confirms active-mode current of 280 µA at 1 MHz and 2.2 V - and while current scales with voltage, operation down to 1.8 V is guaranteed per Recommended Operating Conditions (Section 5.3).