Texas Instruments MSP430FR5739IRHAT

Overview

MSP430FR5739IRHAT from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 16KB ferroelectric RAM (FRAM), 1KB SRAM, 24-MHz CPU, 12-channel 10-bit ADC, 16-channel analog comparator, and dual eUSCI modules supporting UART/IrDA/SPI/I²C. It operates from 2 V to 3.6 V across –40°C to 85°C and targets battery-powered sensor nodes and data acquisition systems.

For engineers reviewing the MSP430FR5739IRHAT datasheet, MSP430FR5739IRHAT pinout, MSP430FR5739IRHAT application, or MSP430FR5739IRHAT equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), RTC with calendar/alarm in LPM3.5 (1.5 µA), active-mode current (81.4 µA/MHz), and 40-pin VQFN (RHA) package compatibility with industrial sensing layouts.

Technical Context

The MSP430FR5739IRHAT integrates a 16-bit CPUXV2 core with hardware multiplier and three-channel DMA for deterministic real-time processing. Its memory subsystem uses FRAM for unified program/data/storage with built-in ECC and MPU-enabling reliable over-the-air firmware updates without flash wear-out concerns.

Analog subsystem includes a 10-bit ADC sampling at 200 ksps with internal reference and sample-and-hold, plus a 16-channel comparator with programmable hysteresis and voltage reference generation-supporting precision threshold detection in low-power wake-up scenarios.

Key Specifications

Pinout & Package

Package: 40-pin VQFN (RHA), 6 mm × 6 mm body with exposed thermal pad (recommended connection to DVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR5969IRHAT, the MSP430FR5739IRHAT offers higher CPU frequency (24 MHz) and lower LPM3.5 current (1.5 µA vs 2.1 µA), making it optimal for time-critical sensor wake-up; versus MSP430F5529IPN, it trades USB for FRAM endurance and sub-µA RTC-favoring long-life battery deployments over connectivity.

Availability

MSP430FR5739IRHAT is available at Aetrix Electronics and suitable for smart meter sensor nodes, industrial wireless sensors, home automation hubs, and portable data loggers requiring stable component supply, long-term lifecycle support, and guaranteed FRAM reliability.

Supply support for MSP430FR5739IRHAT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The MSP430FR573x product line was designed specifically for ultra-low-power sensing and system management in energy-constrained applications such as building automation, smart grid infrastructure, and portable instrumentation.

FAQ

What is the maximum operating frequency of the MSP430FR5739IRHAT?

The MSP430FR5739IRHAT supports a maximum system clock frequency of 24 MHz. This is achieved using the factory-trimmed DCO oscillator or external HFXT crystal. The 24-MHz capability enables real-time signal processing tasks such as FFT computation and high-speed ADC sampling at 200 ksps while maintaining ultra-low-power efficiency in active mode (81.4 µA/MHz). The MSP430FR5739IRHAT does not require external PLL circuitry to reach this speed.

Does the MSP430FR5739IRHAT support real-time clock operation in ultra-low-power mode?

Yes, the MSP430FR5739IRHAT supports real-time clock (RTC) operation in LPM3.5 mode with a 32-kHz crystal connected to PJ.4/XIN and PJ.5/XOUT. In this configuration, the RTC consumes only 1.5 µA typical-enabling calendar and alarm functions without waking the CPU. The RTC_B module includes century, year, month, day, hour, minute, and second registers, and supports periodic interrupts and calibration adjustments. This capability is confirmed in the SLAS639L datasheet Section 1.1 and Table 5.5.

How many analog-to-digital converter channels does the MSP430FR5739IRHAT have?

The MSP430FR5739IRHAT features a 12-channel external + 2-channel internal 10-bit ADC (ADC10_B). The 12 external inputs map to P1.0–P1.5, P3.0–P3.3, and P3.7, while the two internal channels measure temperature and internal reference voltage. It achieves 200 ksps throughput at 100 µA supply current and supports sample-and-hold, internal reference selection (1.5 V or 2.5 V), and window comparator mode. This specification is explicitly listed in Table 3-1 and Section 5.29 of the SLAS639L datasheet.

What communication interfaces are integrated into the MSP430FR5739IRHAT?

The MSP430FR5739IRHAT integrates three enhanced universal serial communication interfaces: eUSCI_A0 and eUSCI_A1 each support UART, IrDA, and SPI; eUSCI_B0 supports I²C and SPI. These peripherals enable concurrent multi-protocol communication-for example, UART to a sensor, I²C to an EEPROM, and SPI to a display-without CPU intervention. All modules support automatic baud-rate detection in UART mode and hardware flow control. This configuration is documented in Section 1.1 Features and Table 3-1 of SLAS639L.

Is the MSP430FR5739IRHAT pin-compatible with other devices in the MSP430FR573x family?

Yes, the MSP430FR5739IRHAT in the 40-pin RHA package shares identical pinout and electrical characteristics with MSP430FR5731IRHAT, MSP430FR5733IRHAT, MSP430FR5735IRHAT, and MSP430FR5737IRHAT per Figure 4-1 and Table 4-1 of SLAS639L. All five devices use the same terminal numbering, signal assignments, and package dimensions (6 mm × 6 mm), allowing direct substitution within the RHA footprint. However, functional differences exist in ADC channel count and comparator inputs-verify peripheral enablement in firmware.