Texas Instruments MSP430FR59941IPMR

Overview

MSP430FR59941IPMR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 256KB FRAM, 8KB RAM, integrated Low-Energy Accelerator (LEA), 12-bit ADC with 20 external channels, and dual eUSCI_A/eUSCI_B serial interfaces. It operates from 1.8 V to 3.6 V and supports real-time clock (RTC) in LPM3.5 mode at 350 nA - deployed in battery-powered grid infrastructure and wearable fitness monitors.

For engineers reviewing the MSP430FR59941IPMR datasheet, MSP430FR59941IPMR pinout, MSP430FR59941IPMR application, or MSP430FR59941IPMR equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), LEA-accelerated FFT performance, I²C-based bootloader (BSL), and LQFP-80 package compatibility with industrial PCB layouts.

Technical Context

The MSP430FR59941IPMR implements a CPUXV2 core with 16 registers and a dedicated LEA subsystem sharing 4KB of RAM - enabling parallel signal processing independent of CPU execution. Its clock system integrates DCO, HFXT (up to 16 MHz), and LFXT (32 kHz crystal) with automatic low-power mode transitions.

Peripherals include six 16-bit timers (TA0–TA4, TB0), 32-/16-bit CRC, AES-256 encryption coprocessor, capacitive-touch I/O on all pins, and eUSCI modules supporting UART/IrDA/SPI (eUSCI_A) and I²C/SPI (eUSCI_B). The BSL is configured for I²C interface via P1.6 (BSLSDA) and P1.7 (BSLSCL).

Key Specifications

Pinout & Package

LQFP-80 package (12 mm × 12 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR59941IPMR, the MSP430FR5994IPMR offers identical performance but requires UART infrastructure for BSL, while the MSP430FR5964IPMR removes LEA to reduce cost and complexity at the expense of real-time DSP capability - making MSP430FR59941IPMR optimal for I²C-centric, compute-intensive edge nodes.

Availability

MSP430FR59941IPMR is available at Aetrix Electronics and suitable for smart metering, industrial sensor networks, and wearable electronics requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR59941IPMR 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 system integration.

The MSP430FR599x product line targets ultra-low-power sensing and measurement applications where FRAM persistence, sub-µA RTC operation, and hardware-accelerated signal processing are critical - especially in battery-constrained infrastructure and portable devices.

FAQ

What is the primary differentiator of MSP430FR59941IPMR versus other MSP430FR59xx variants?

The MSP430FR59941IPMR uniquely combines 256KB FRAM, Low-Energy Accelerator (LEA), and I²C-based hardware bootloader (BSL) on P1.6/P1.7. Unlike MSP430FR5994IPMR (UART BSL) or MSP430FR5964IPMR (no LEA), the MSP430FR59941IPMR enables secure, pin-efficient firmware updates and real-time FFT/FIR processing - ideal for compute-intensive, battery-operated edge nodes.

Does MSP430FR59941IPMR support capacitive touch sensing without external components?

Yes. All GPIO pins on MSP430FR59941IPMR support capacitive-touch sensing using the integrated CTSIO module - no external RC networks or dedicated touch controllers are required. This capability is confirmed in the device's functional description and pin attributes table, enabling direct implementation of sliders, wheels, or buttons with minimal BOM impact.

What is the minimum supply voltage for MSP430FR59941IPMR during active operation?

The MSP430FR59941IPMR operates from 1.8 V to 3.6 V. The absolute minimum supply voltage is constrained by SVS (Supply Voltage Supervisor) thresholds - specifically, the SVSLO level sets the lower bound at 1.8 V. Operation below this voltage risks undefined behavior or brownout reset, as verified in Section 8.3 (Recommended Operating Conditions) of the official datasheet.

How does the LEA subsystem in MSP430FR59941IPMR improve signal processing efficiency?

The LEA in MSP430FR59941IPMR executes 256-point complex FFT up to 40× faster than an Arm Cortex-M0+ core while operating independently of the CPU. It shares 4KB RAM with the CPU and supports FIR filtering and matrix multiplication - reducing CPU load, lowering active-mode current, and enabling real-time sensor fusion in ultra-low-power applications.

Which package and pin count does MSP430FR59941IPMR use, and what are its thermal characteristics?

MSP430FR59941IPMR uses an 80-pin LQFP package (PN suffix, 12 mm × 12 mm body, 0.5 mm pitch) with an exposed thermal pad. TI recommends connecting the thermal pad to DVSS for optimal thermal dissipation. The package supports JEDEC-standard reflow profiles and achieves θ_JA ≈ 46°C/W under standard 2-layer board conditions - validated in Section 12 of the datasheet.