Texas Instruments MSP430FR59941IZVWR

Overview

MSP430FR59941IZVWR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller featuring 256KB FRAM, 8KB RAM, integrated Low-Energy Accelerator (LEA), 12-bit ADC with 20 external channels, and dual eUSCI_A/eUSCI_B peripherals supporting UART/IrDA and I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensing and real-time signal processing in constrained environments.

For engineers reviewing the MSP430FR59941IZVWR datasheet, MSP430FR59941IZVWR pinout, MSP430FR59941IZVWR application, or MSP430FR59941IZVWR equivalent, key selection criteria include FRAM endurance (10¹⁵ writes), LPM3.5 current (350 nA with RTC), LEA-accelerated FFT performance, I²C bootloader capability, and NFBGA-87 package compatibility with high-density PCB layouts.

Technical Context

The MSP430FR59941IZVWR implements a CPUXV2 16-bit RISC core with up to 16 MHz operation, paired with a dedicated LEA subsystem that executes 256-point complex FFT independently of the CPU-delivering up to 40× speedup versus Cortex-M0+ for sensor data preprocessing. Its memory architecture unifies code and data in nonvolatile FRAM with 125 ns write latency and no erase cycles.

Power management includes five low-power modes (LPM0–LPM4.5), with LPM3.5 sustaining RTC operation via 3.7-pF crystal at 350 nA, and LPM4.5 achieving 45 nA shutdown. Clock sources include DCO (10 factory-trimmed frequencies), LFXT (32 kHz crystal), HFXT (up to 24 MHz), and VLO-enabling precise timing across operating modes without external components.

Key Specifications

Pinout & Package

NFBGA-87 package (6 mm × 6 mm, ball pitch 0.5 mm), optimized for space-constrained industrial and wearable designs. Thermal pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR59941IZVWR, the MSP430FR5994IZVWR offers identical processing and memory but trades I²C BSL for UART BSL-reducing flexibility in systems lacking UART routing. The MSP430FR59641IZVWR removes LEA entirely, cutting DSP capability while retaining FRAM benefits for basic sensing.

Availability

MSP430FR59941IZVWR is available at Aetrix Electronics and suitable for smart metering, industrial predictive maintenance, wearable health monitoring, building automation, and grid infrastructure applications requiring stable component supply, long-term manufacturability, and ultra-low-power operation.

Supply support for MSP430FR59941IZVWR 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, reliability, and system-level integration.

The MSP430FR599x product line was engineered for ultra-low-power sensing and real-time signal processing in battery-operated and energy-harvesting systems-prioritizing FRAM endurance, sub-µA sleep currents, and hardware-accelerated analytics.

FAQ

What distinguishes MSP430FR59941IZVWR from MSP430FR5994IZVWR?

The MSP430FR59941IZVWR integrates an I²C-based bootloader (BSL), enabling firmware updates over existing I²C buses without dedicated UART lines. In contrast, MSP430FR5994IZVWR uses a UART BSL. Both share identical FRAM (256 KB), RAM (8 KB), LEA accelerator, and NFBGA-87 packaging. Pin functions differ only on P1.6/P1.7 (BSLSDA/BSLSCL vs. general-purpose I/O).

Does MSP430FR59941IZVWR support crystal-less operation?

Yes, MSP430FR59941IZVWR supports crystal-less operation using its internal digitally controlled oscillator (DCO) with 10 factory-trimmed frequencies ranging from ~10 kHz to 16 MHz. However, RTC operation in LPM3.5 requires an external 32-kHz crystal on PJ.4/PJ.5; the DCO cannot substitute for precision timekeeping in ultra-low-power modes.

How does the LEA subsystem in MSP430FR59941IZVWR improve power efficiency?

The LEA subsystem in MSP430FR59941IZVWR executes signal-processing routines like 256-point FFT autonomously while the CPU remains in LPM3. This reduces active-mode CPU time from ~4 ms to under 100 µs per transform, cutting average current consumption significantly. Combined with 350 nA LPM3.5 RTC, it enables multi-year battery life in intermittent-sampling applications.

What is the maximum external clock frequency supported by MSP430FR59941IZVWR?

MSP430FR59941IZVWR supports an external high-frequency crystal (HFXT) up to 24 MHz on PJ.6/PJ.7. This clock can drive the MCLK for full-speed CPU operation or serve as a source for peripheral modules such as timers and eUSCI baud-rate generation, enabling high-throughput serial communication and precise PWM timing.

Can MSP430FR59941IZVWR operate across the full industrial temperature range?

Yes, MSP430FR59941IZVWR is qualified for operation from –40°C to +85°C ambient temperature. Its FRAM memory retains data integrity and write endurance across this range, and all electrical specifications-including LPM3.5 current (350 nA), ADC accuracy, and clock stability-are guaranteed within these limits per TI's SLASE54D production data sheet.