Texas Instruments MSP430FR58891IPM

Overview

MSP430FR58891IPM from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 128KB nonvolatile memory, 2KB RAM, 12-bit ADC (12 external inputs), RTC, and extended scan interface (ESI) for metering applications. It operates from 1.8 V to 3.6 V and delivers 100 µA/MHz active current, 0.35 µA RTC mode, and supports capacitive touch I/O on all ports. Used in water/heat meters and portable data loggers.

For engineers reviewing the MSP430FR58891IPM datasheet, MSP430FR58891IPM pinout, MSP430FR58891IPM application, or MSP430FR58891IPM equivalent, key selection criteria include FRAM endurance (10¹⁵ writes), ESI peripheral for background analog sensing, LPM3.5 RTC operation, 64-pin LQFP package compatibility, and UART/I²C bootloader support.

Technical Context

The MSP430FR58891IPM integrates a 16-bit CPUXV2 core with FRAM-based unified memory architecture enabling simultaneous code execution and data logging without wear leveling. Its clock system combines DCO (10 factory-trimmed frequencies), LFXT (32-kHz crystal), and HFXT for flexible timing control across power modes.

Peripherals include dual eUSCI_A (UART/IrDA/SPI) and dual eUSCI_B (I²C/SPI) modules, three-channel DMA, 32-bit hardware multiplier, CRC16/CRC32 engines, five 16-bit timers (TA0–TA3, TB0), and an integrated ESI for low-power analog front-end scanning-critical for metrology-grade sensor interfacing without CPU intervention.

Key Specifications

Pinout & Package

LQFP-64 package with 10 mm × 10 mm body size, exposed thermal pad (RGC variant differs; this part is IPM - LQFP only), standard JEDEC footprint, and 0.5-mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR5889IPM and MSP430FR58881IPM, the MSP430FR58891IPM provides I²C-based bootloader flexibility and maximum FRAM capacity in the LQFP-64 form factor-critical for secure, field-upgradable metering systems requiring extensive historical data retention.

Availability

MSP430FR58891IPM is available at Aetrix Electronics and suitable for water metering, heat cost allocation, and portable medical logging requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.

Supply support for MSP430FR58891IPM 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 MSP430 ULP FRAM portfolio targets energy-constrained applications such as utility metering and portable instrumentation, combining ferroelectric memory with ultra-low-power system architecture to eliminate flash limitations.

FAQ

What is the maximum operating frequency of the MSP430FR58891IPM?

The MSP430FR58891IPM supports a maximum system clock frequency of 16 MHz via its digitally controlled oscillator (DCO), with 10 factory-trimmed frequency settings. This allows deterministic timing for real-time tasks while maintaining ultra-low-power operation across all seven low-power modes, including LPM3.5 where the RTC remains active at 0.35 µA.

Does the MSP430FR58891IPM include hardware encryption capabilities?

No, the MSP430FR58891IPM does not integrate AES or other cryptographic accelerators. Its security features include a true random number seed generator for software-based RNG and memory protection unit (MPU) with IP encapsulation. For applications requiring hardware encryption, designers should consider the MSP430FR6989 or companion secure elements.

How many external ADC input channels does the MSP430FR58891IPM support?

The MSP430FR58891IPM supports up to 12 external analog input channels via its 12-bit ADC12_B module. It also includes internal references, sample-and-hold, and programmable conversion triggers-enabling precise sensor interfacing in metering and portable instrumentation without external signal conditioning.

Is the MSP430FR58891IPM pin-compatible with the MSP430FR5889IPM?

Yes, the MSP430FR58891IPM and MSP430FR5889IPM share identical LQFP-64 pinouts, electrical characteristics, and peripheral mappings. The sole functional difference is the bootloader interface: MSP430FR58891IPM uses I²C BSL, while MSP430FR5889IPM uses UART BSL. PCB layouts are interchangeable.

What is the role of the Extended Scan Interface (ESI) in the MSP430FR58891IPM?

The Extended Scan Interface (ESI) in the MSP430FR58891IPM is a dedicated hardware peripheral that autonomously performs analog front-end operations-including capacitance-to-digital conversion, charge accumulation, and background scanning-for water, heat, and gas volume measurement. It operates independently of the CPU, reducing active time and power consumption by up to 70% during continuous sensing cycles.