Texas Instruments MSP430FR5857IRHAR

Overview

MSP430FR5857IRHAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB nonvolatile memory, 1KB RAM, and integrated 12-bit ADC with 14 external analog inputs. It features HFXT oscillator support (no LFXT), RTC_B module disabled, five 16-bit timers, eUSCI_A0/A1 (UART/IrDA/SPI) and eUSCI_B0 (I²C/SPI), and operates from 1.8 V to 3.6 V. It targets battery-powered sensor nodes and data loggers requiring fast FRAM writes and sub-µA LPM3.5 operation.

For engineers reviewing the MSP430FR5857IRHAR datasheet, MSP430FR5857IRHAR pinout, MSP430FR5857IRHAR application, or MSP430FR5857IRHAR equivalent, key selection criteria include HFXT-only clocking, 40-pin VQFN (RHA) package, 32KB FRAM size, RTC_B unavailability, and UART-based BSL implementation on P2.0/P2.1.

Technical Context

This device belongs to the MSP430FR585x series optimized for high-frequency crystal (HFXT) operation only - it lacks LFXIN/LFXOUT pins and cannot run RTC_B. Its CPUXV2 core supports up to 16 MHz, with active-mode current at ~100 µA/MHz and LPM3.5 current at 0.25 µA typical using VLO.

The peripheral set includes ADC12_B with internal reference and sample-and-hold, Comp_E with 16 channels, three-channel DMA, 32-bit hardware multiplier, CRC16 engine, and capacitive touch I/O on all ports without external components.

Key Specifications

Pinout & Package

VQFN-40 (RHA) package with 6 mm × 6 mm body size and exposed 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 microcontroller applications.

Compared with MSP430FR5858IRHAR, the MSP430FR5857IRHAR trades 16 KB FRAM for lower cost and power in memory-constrained deployments; versus MSP430FR5847IRHAR, it sacrifices RTC_B and LFXT support to enable higher-frequency system timing and faster processing throughput.

Availability

MSP430FR5857IRHAR is available at Aetrix Electronics and suitable for metering, energy-harvested sensor nodes, and wearable electronics requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR5857IRHAR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The MSP430FR585x product line targets ultra-low-power sensing and measurement applications where FRAM endurance, fast write performance, and sub-µA sleep modes are essential design requirements.

FAQ

Does MSP430FR5857IRHAR support real-time clock (RTC) functionality?

No, MSP430FR5857IRHAR does not support RTC_B. It belongs to the HFXT-only variant group and lacks LFXIN/LFXOUT pins required for the 32.768 kHz crystal oscillator that drives RTC_B. The device can generate time bases using VLO or DCO, but calendar/time-of-day functions are unavailable. For RTC capability, consider MSP430FR5847IRHAR or MSP430FR5859IRHAR with LFXT support.

What is the maximum operating frequency of MSP430FR5857IRHAR?

The MSP430FR5857IRHAR supports a maximum system clock frequency of 16 MHz using its digitally controlled oscillator (DCO) or external HFXT crystal (4–24 MHz). The CPUXV2 core executes instructions at this rate, and all peripherals - including ADC12_B, timers, and eUSCI modules - are fully functional at 16 MHz. Performance is sustained across the full 1.8 V–3.6 V supply range.

Which serial interfaces are available on MSP430FR5857IRHAR?

MSP430FR5857IRHAR integrates eUSCI_A0 and eUSCI_A1 (each supporting UART, IrDA, and SPI) plus eUSCI_B0 (supporting I²C and SPI). UART mode is used for the hardware bootloader (BSL) on P2.0 (TX) and P2.1 (RX). All eUSCI modules operate independently and can be configured simultaneously - for example, UART for host debug, SPI for sensor interface, and I²C for EEPROM communication.

How many analog input channels does the ADC12_B module support on MSP430FR5857IRHAR?

The ADC12_B module on MSP430FR5857IRHAR supports 14 external analog input channels (A0–A13) plus two internal references (temperature sensor and VREF). This matches the MSP430FR584x/585x family specification and differs from the MSP430FR586x series, which offers 16 external channels. Inputs are selectable via the ADCMCTL0–ADCMCTL15 registers and sampled with 12-bit resolution and configurable sample-and-hold timing.

Is MSP430FR5857IRHAR pin-compatible with other devices in the MSP430FR58xx family?

Yes, MSP430FR5857IRHAR in the 40-pin VQFN (RHA) package shares identical pinout with MSP430FR5858IRHAR, MSP430FR5859IRHAR, MSP430FR5847IRHAR, and MSP430FR5848IRHAR. However, functional compatibility depends on oscillator configuration: MSP430FR5857IRHAR uses HFXIN/HFXOUT (pins 1–2), while MSP430FR5847IRHAR uses LFXIN/LFXOUT (pins 1–2 on DA/RHA variants). Board designs must route accordingly.