Texas Instruments MSP430FR5847IRHAR

Overview

MSP430FR5847IRHAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB nonvolatile memory, 1KB SRAM, and integrated 12-bit ADC (14 external channels), RTC, and dual eUSCI modules (UART/I²C/SPI). It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes requiring long-term data retention without wear-out.

For engineers reviewing the MSP430FR5847IRHAR datasheet, MSP430FR5847IRHAR pinout, MSP430FR5847IRHAR application, or MSP430FR5847IRHAR equivalent, key selection criteria include its LFXT-only clock architecture, 40-pin VQFN (RHA) package, 0.25 µA RTC mode current, FRAM endurance (10¹⁵ writes), and UART-based BSL support - all critical for energy-harvested metering and wearable designs.

Technical Context

The MSP430FR5847IRHAR implements the ULP CPUXV2 core with seven low-power modes, including LPM3.5 (RTC active, 0.25 µA typical) and LPM4.5 (shutdown, 0.02 µA typical). Its FRAM memory replaces flash and EEPROM, enabling byte-level writes at 125 ns/word with no erase cycles.

It integrates a 12-bit ADC with internal reference and sample-and-hold, five 16-bit timers (including Timer_B with 7 capture/compare registers), 32-bit hardware multiplier, and three-channel DMA. The device supports capacitive touch on all I/O pins without external components and includes a hardware CRC16 module.

Key Specifications

Pinout & Package

VQFN-40 (RHA) package, 6 mm × 6 mm body, 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 microcontroller applications.

Compared with MSP430FR5847IRHAR, MSP430FR58471IRHAR trades UART BSL for I²C BSL - ideal for I²C-centric production lines - while MSP430FR5848IRHAR offers +16 KB FRAM and +1 KB SRAM at identical pinout and power profile, easing scalability without layout change.

Availability

MSP430FR5847IRHAR is available at Aetrix Electronics and suitable for smart utility metering, energy-harvested sensor nodes, and wearable health monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MSP430FR5847IRHAR 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 and embedded processing solutions, with decades of expertise in ultra-low-power microcontrollers and precision analog signal chains.

The MSP430FR58xx family is designed for energy-constrained applications demanding nonvolatile memory reliability, sub-µA real-time operation, and integrated analog peripherals - targeting metering, sensing, and portable instrumentation.

FAQ

What is the maximum operating frequency of the MSP430FR5847IRHAR?

The MSP430FR5847IRHAR supports a maximum system clock frequency of 16 MHz using its factory-trimmed DCO or external HFXT (though HFXT is not supported on this LFXT-only variant). Its CPUXV2 core executes instructions at 16-MHz clock rate, enabling responsive real-time control while maintaining ultra-low active-mode current (~100 µA/MHz).

Does the MSP430FR5847IRHAR support an external high-frequency crystal (HFXT)?

No, the MSP430FR5847IRHAR does not support HFXT. As confirmed in the device comparison table and functional block diagram notes, it belongs to the MSP430FR584x series with LFXT-only clock capability. Pins PJ.6/HFXIN and PJ.7/HFXOUT are not functional on this part; only PJ.4/LFXIN and PJ.5/LFXOUT are used for the 32-kHz RTC crystal.

How many ADC input channels does the MSP430FR5847IRHAR support?

The MSP430FR5847IRHAR supports 14 external analog input channels (A0–A15, excluding A6 and A7 which are not routed to pins in the RHA package) plus two internal channels (temperature sensor and VREF). This is explicitly documented in Table 3-1 (Device Comparison) and verified in the signal descriptions for pins P1.0–P1.5, P3.0–P3.3, P4.0–P4.1, and P2.3–P2.4.

What bootloading options are available on the MSP430FR5847IRHAR?

The MSP430FR5847IRHAR features a UART-based hardware bootloader (BSL) accessible via P2.0 (BSLTX) and P2.1 (BSLRX), as specified in the pin diagrams and signal descriptions. It does not support I²C BSL - that functionality is reserved for the MSP430FR58471IRHAR variant. No JTAG or Spy-Bi-Wire BSL is factory-enabled; those require debugger hardware.

Is the MSP430FR5847IRHAR pin-compatible with other devices in the MSP430FR58xx family?

Yes, the MSP430FR5847IRHAR shares the same 40-pin VQFN (RHA) package and pinout with MSP430FR58471IRHAR, MSP430FR5848IRHAR, and MSP430FR5849IRHAR. All four variants route identical signals to identical pins, enabling drop-in replacement within the RHA package group - subject to verifying BSL type (UART vs. I²C) and FRAM/SRAM sizing in firmware.