Texas Instruments MSP430FR5847IDAR

Overview

MSP430FR5847IDAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB nonvolatile memory, 1KB RAM, 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 and data loggers requiring long-term retention without write endurance limits.

For engineers reviewing the MSP430FR5847IDAR datasheet, MSP430FR5847IDAR pinout, MSP430FR5847IDAR application, or MSP430FR5847IDAR equivalent, key selection criteria include its LFXT-only clock system, 40-pin TSSOP package, UART-capable BSL, 0.25 µA RTC mode current, and FRAM's 10¹⁵ write-cycle endurance for frequent logging.

Technical Context

The MSP430FR5847IDAR implements the CPUXV2 core with 16 registers and supports seven low-power modes, including LPM3.5 (RTC active) at 0.25 µA typical. Its FRAM memory architecture unifies program, data, and storage space, enabling atomic writes and eliminating erase cycles.

Peripherals include three 16-bit Timer_A modules (3/3/2 capture/compare registers), one 16-bit Timer_B (7 registers), 32-bit hardware multiplier, 3-channel DMA, and eUSCI_A0/A1 (UART/IrDA/SPI) plus eUSCI_B0 (I²C/SPI). The device lacks HFXT support and uses only LFXT (32 kHz crystal) for RTC operation.

Key Specifications

Pinout & Package

Package: TSSOP-38 (38-pin Thin Shrink Small Outline Package), 12.5 mm × 6.2 mm body size, lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR58471IDAR, the MSP430FR5847IDAR offers UART BSL for simpler serial updater integration; compared with MSP430FR5848IDAR, it trades memory capacity for lower cost and reduced power in memory-constrained deployments.

Availability

MSP430FR5847IDAR is available at Aetrix Electronics and suitable for metering, energy-harvested sensor nodes, and wearable electronics requiring stable component supply and long-term production continuity.

Supply support for MSP430FR5847IDAR 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 for industrial, automotive, and personal electronics markets.

The MSP430FR58xx family is designed for ultra-low-power sensing and measurement applications, leveraging FRAM to eliminate flash write limitations while maintaining MCU-level programmability and peripheral richness.

FAQ

What is the maximum operating frequency of the MSP430FR5847IDAR?

The MSP430FR5847IDAR supports a maximum system clock frequency of 16 MHz via its factory-trimmed DCO oscillator. This frequency is achievable across the full 1.8 V to 3.6 V supply range and enables deterministic real-time execution for time-critical tasks such as sensor sampling and communication protocol timing. The MSP430FR5847IDAR does not support high-frequency crystal (HFXT) oscillators-its clock system relies solely on DCO and low-frequency 32-kHz LFXT for RTC.

Does the MSP430FR5847IDAR support hardware encryption or secure boot?

The MSP430FR5847IDAR does not integrate AES or other hardware encryption engines. It provides a random number seed generator for software-based cryptographic algorithms but lacks dedicated security peripherals such as secure boot ROM, tamper detection, or key storage. Secure firmware updates must be implemented in software using authenticated signatures verified against keys stored in protected FRAM segments. The MSP430FR5847IDAR relies on its Memory Protection Unit (MPU) and IP encapsulation features to restrict unauthorized access to code and data regions.

What package type and pin count does the MSP430FR5847IDAR use?

The MSP430FR5847IDAR is packaged in a 38-pin TSSOP (Thin Shrink Small Outline Package) with body dimensions of 12.5 mm × 6.2 mm and 0.65 mm lead pitch. This package is explicitly listed in TI's Device Comparison table for the MSP430FR584x series and confirmed in Figure 4-3 of the datasheet. It contains all essential signals-including LFXT inputs (PJ.4/LFXIN, PJ.5/LFXOUT), analog inputs (A0–A15), and eUSCI peripherals-while omitting HFXIN/HFXOUT pins present in HFXT-capable variants.

Can the MSP430FR5847IDAR operate without an external crystal?

Yes, the MSP430FR5847IDAR can operate without an external crystal using its internal digitally controlled oscillator (DCO), which offers 10 factory-trimmed frequencies up to 16 MHz. However, the RTC module requires the 32-kHz LFXT crystal (connected to PJ.4/LFXIN and PJ.5/LFXOUT) to function-no internal low-frequency source substitutes for RTC accuracy. For applications needing only active-mode timing or basic low-power sleep (LPM3), the DCO suffices; RTC-dependent use cases mandate the external 32-kHz crystal.

How many ADC input channels does the MSP430FR5847IDAR support?

The MSP430FR5847IDAR supports 14 external analog input channels (A0–A13) and 2 internal reference channels (VeREF±), as specified in the Device Comparison table and Signal Descriptions section. These inputs map directly to GPIO pins P1.0–P1.5, P3.0–P3.3, P4.0–P4.1, and P2.3–P2.4. The ADC12_B module includes sample-and-hold, programmable conversion resolution, and flexible trigger sources-including timer and software-making it suitable for synchronized multi-channel acquisition in metering and sensor applications.