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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Texas Instruments MSP430FR69891IPNR

Name: MSP430FR69891IPNR
Brand: Texas Instruments
SKU: MSP430FR69891IPNR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430FR69891IPNR

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 80-LQFP

Datasheet:: MSP430FR69891IPNR.pdf

Description:: IC MCU 16BIT 128KB FRAM 80LQFP

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Product details

Overview

MSP430FR69891IPNR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 128KB ferroelectric RAM (FRAM), 2KB SRAM, integrated LCD driver (up to 320 segments), 12-bit ADC with 16 external inputs, and Extended Scan Interface (ESI) for precision metering. It operates from 1.8 V to 3.6 V and targets battery-powered utility meters and portable medical devices.

For engineers reviewing the MSP430FR69891IPNR datasheet, MSP430FR69891IPNR pinout, MSP430FR69891IPNR application, or MSP430FR69891IPNR equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), RTC current in LPM3.5 (0.35 µA), ESI-based background sensing, AES256 security coprocessor, and I2C Bootloader (BSL) support - all validated for water/heat metering and data logging systems.

Technical Context

The MSP430FR69891IPNR implements a ULP CPUXV2 core with seven low-power modes, including LPM3.5 (RTC active, 0.35 µA) and LPM4.5 (shutdown, 0.02 µA). Its clock system integrates DCO (10 factory-trimmed frequencies), LFXT (32-kHz crystal), and HFXT (high-frequency crystal) sources, enabling precise timing for calendar functions and sensor sampling.

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, and five 16-bit timers (TA0–TA3, TB0) with up to seven capture/compare registers per timer - supporting complex waveform generation and event synchronization without CPU intervention.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPUXV2, up to 16-MHz operation - enables deterministic real-time control with minimal power overhead.
Nonvolatile Memory	128KB FRAM - provides flash-equivalent retention with SRAM-like write speed (125 ns/word) and 10¹⁵ endurance for frequent data logging.
RAM	2KB SRAM - supports fast variable storage and stack operations during active mode execution.
ADC	12-bit ADC12_B with internal reference and sample-and-hold - delivers ±1 LSB INL for accurate analog sensor digitization across 16 external channels.
Low-Power Modes	LPM3.5 (RTC active): 0.35 µA typical - sustains calendar timekeeping and wake-on-interrupt while preserving full FRAM/SRAM content.
Security	AES256 encryption/decryption coprocessor - accelerates secure firmware updates and encrypted data transmission without CPU load.
Bootloader	Hardware UART and I²C BSL - enables field firmware upgrades via serial interface without JTAG debugger.

Pinout & Package

Package: 80-pin LQFP (PN), body size 12 mm × 12 mm, RoHS-compliant, lead-free.

Pin/Terminal	Circuit Role	Design Meaning
P1.0–P1.7	General-purpose I/O with capacitive touch, ADC, timer, USCI	Supports multi-function routing (e.g., P1.6 = UCB0SIMO/UCB0SDA/TA0.1); enables shared peripheral use without external muxing.
P2.0–P2.7	General-purpose I/O with USCI, timer, RTCCLK, DMAE0	P2.0/P2.1 serve as UART BSL TX/RX on UART-BSL variants; not used for I²C BSL (MSP430FR69891 uses P1.6/P1.7).
P3.0–P3.7	General-purpose I/O with USCI_A1/B1, timer	Configurable as SPI master/slave or I²C slave; supports simultaneous dual-USCI communication for sensor hub architectures.
P5.0–P5.7	General-purpose I/O with timer, USCI_B1, SMCLK	P5.2 provides ACLK output for external timing distribution; P5.0–P5.1 support TA1 capture/compare for pulse-width measurement.
P6.0–P6.7	LCD segment/com drivers, timer, comparator	Direct drive of up to 320-segment LCD (static or 2–8 mux); eliminates need for external display controller in metering UIs.
P9.0–P9.7	ESI channel inputs (ESICH0–ESICH3), test signals	Four dedicated ESI input channels with programmable gain and filtering - optimized for differential capacitance sensing in water/heat meters.
PJ.0–PJ.5	JTAG/SBW debug, clock inputs (HFXIN/LFXIN)	PJ.4/PJ.5 connect 32-kHz crystal for RTC; PJ.6/PJ.7 connect HFXT for high-speed system clock.
RST/NMI/SBWTDIO	Reset, non-maskable interrupt, Spy-Bi-Wire data I/O	Single-wire debug interface enables programming and debugging using only TEST and RST pins - reduces PCB footprint vs. 4-pin JTAG.

Key Features

Feature	Design Value
Ultra-Low-Power FRAM	128KB nonvolatile memory with 10¹⁵ write cycles and 125 ns write time - eliminates wear-leveling firmware and enables true EEPROM-style logging at SRAM speed.
Extended Scan Interface (ESI)	Dedicated hardware for background capacitance-to-digital conversion - measures water/heat/gas volume without CPU involvement, reducing active time by >90% in metering applications.
Integrated LCD Driver	Drives up to 320 segments with contrast control and static/2–8 multiplex support - removes external LCD controller and associated BOM cost in utility meter displays.
Real-Time Clock with Calendar	RTC_C module with alarm, calibration, and LPM3.5 operation at 0.35 µA - maintains accurate time stamping for billing intervals and data logging over 10+ year battery life.
Hardware AES256 Coprocessor	Offloads encryption/decryption from CPU - secures firmware updates and sensor data payloads while maintaining sub-µA sleep current in secure IoT endpoints.

Applications

Water Meters	Heat Cost Allocators
Use Scenario: Ultrasonic or mechanical flow measurement with hourly consumption logging and tamper detection. IC Role / Device Role / Timing Role: Main controller executing ESI-based flow calculation, FRAM-based data storage, and RTC-timestamped billing records. Use Value: 128KB FRAM stores >10 years of hourly readings; ESI enables continuous background sensing at <1 µA average current.	Use Scenario: Thermal energy allocation in multi-tenant buildings using temperature differential and flow rate integration. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating RTD, thermistor, and flow data; performs real-time heat calculation and secure data upload. Use Value: AES256 encrypts tenant usage data before transmission; integrated LCD displays allocation metrics without external controller.
Portable Medical Meters	Data Logging Systems
Use Scenario: Battery-powered blood glucose or inhaler dose counters requiring FDA-grade data integrity and audit trail. IC Role / Device Role / Timing Role: Secure data acquisition node with tamper-evident logging, calibrated ADC, and cryptographic signature generation. Use Value: FRAM ensures no data loss during unexpected power loss; AES256 enables HIPAA-compliant encrypted storage of patient records.	Use Scenario: Environmental monitoring (temperature, humidity, pressure) in industrial or agricultural settings with long-term unattended operation. IC Role / Device Role / Timing Role: Autonomous logger capturing sensor data at configurable intervals, storing in FRAM, and transmitting via UART/I²C to gateway. Use Value: LPM4.5 shutdown mode draws only 0.02 µA - extends 2xAA battery life beyond 10 years for infrequent sampling intervals.

Water Meters

Heat Cost Allocators

Use Scenario: Ultrasonic or mechanical flow measurement with hourly consumption logging and tamper detection.

IC Role / Device Role / Timing Role: Main controller executing ESI-based flow calculation, FRAM-based data storage, and RTC-timestamped billing records.

Use Value: 128KB FRAM stores >10 years of hourly readings; ESI enables continuous background sensing at <1 µA average current.

Use Scenario: Thermal energy allocation in multi-tenant buildings using temperature differential and flow rate integration.

IC Role / Device Role / Timing Role: Sensor fusion hub aggregating RTD, thermistor, and flow data; performs real-time heat calculation and secure data upload.

Use Value: AES256 encrypts tenant usage data before transmission; integrated LCD displays allocation metrics without external controller.

Portable Medical Meters

Data Logging Systems

Use Scenario: Battery-powered blood glucose or inhaler dose counters requiring FDA-grade data integrity and audit trail.

IC Role / Device Role / Timing Role: Secure data acquisition node with tamper-evident logging, calibrated ADC, and cryptographic signature generation.

Use Value: FRAM ensures no data loss during unexpected power loss; AES256 enables HIPAA-compliant encrypted storage of patient records.

Use Scenario: Environmental monitoring (temperature, humidity, pressure) in industrial or agricultural settings with long-term unattended operation.

IC Role / Device Role / Timing Role: Autonomous logger capturing sensor data at configurable intervals, storing in FRAM, and transmitting via UART/I²C to gateway.

Use Value: LPM4.5 shutdown mode draws only 0.02 µA - extends 2xAA battery life beyond 10 years for infrequent sampling intervals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430FR6989IPN	Identical FRAM/SRAM/peripherals but features UART Bootloader (BSL) instead of I²C BSL; P2.0/P2.1 assigned to BSLTX/BSLRX.	Preferred where UART-based field firmware updates are required; incompatible with I²C-only host update infrastructure.	Select MSP430FR6989IPN if UART BSL is mandatory; verify P2.0/P2.1 pin assignment aligns with system debug/update architecture.
MSP430FR59891IPM	Same FRAM/SRAM, clock system, and peripherals but in 64-pin LQFP (PM) package; lacks LCD_C and ESI peripherals; reduced I/O count (48 vs. 63).	Suitable for compact sensor nodes without display or advanced metrology; not viable for LCD-driven meters or ESI-based volumetric sensing.	Choose MSP430FR59891IPM only when LCD and ESI are unnecessary and board space constraints demand smaller footprint.

Compared with MSP430FR69891IPNR, the MSP430FR6989IPN offers identical metrology capability but requires UART-based BSL infrastructure, while the MSP430FR59891IPM sacrifices LCD and ESI to reduce size and cost - making MSP430FR69891IPNR the optimal choice for full-featured utility meters with secure, low-power display and sensing.

Availability

MSP430FR69891IPNR is available at Aetrix Electronics and suitable for water meters, heat cost allocators, and portable medical meters requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MSP430FR69891IPNR 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 consumer applications.

The MSP430 ULP FRAM portfolio targets energy-constrained metering and sensing applications, combining FRAM nonvolatility, ultra-low-power operation, and integrated metrology peripherals like ESI and LCD_C.

FAQ

What is the primary differentiator of the MSP430FR69891IPNR versus standard flash-based MCUs?

The MSP430FR69891IPNR replaces flash with 128KB ferroelectric RAM (FRAM), delivering 10¹⁵ write cycles, 125 ns write speed, and zero write latency - eliminating erase-before-write delays and wear-leveling complexity. This enables reliable, high-frequency data logging in utility meters without compromising battery life or firmware robustness. The MSP430FR69891IPNR also integrates ESI and LCD_C peripherals absent in most flash-based alternatives.

Does the MSP430FR69891IPNR support real-time clock functionality with battery backup?

Yes, the MSP430FR69891IPNR includes RTC_C with calendar and alarm functions that operate in LPM3.5 mode at 0.35 µA typical current. It supports external 32-kHz crystal connection (via PJ.4/PJ.5) for high-accuracy timekeeping and retains full FRAM/SRAM content during RTC operation - enabling decade-long timestamped data logging without external RTC IC or backup capacitor.

How does the Extended Scan Interface (ESI) in the MSP430FR69891IPNR improve metering accuracy?

The ESI in the MSP430FR69891IPNR performs autonomous, background capacitance-to-digital conversion on up to four dedicated input channels (P9.0–P9.3), enabling precise water/heat/gas volume measurement without CPU intervention. It includes programmable gain, filtering, and offset cancellation - reducing measurement noise and drift while lowering system power by keeping the CPU in deep sleep during sensing cycles.

What debug interface does the MSP430FR69891IPNR use, and what pins are required?

The MSP430FR69891IPNR uses Spy-Bi-Wire (SBW), a two-pin debug interface compatible with TI's MSP-FET and LaunchPad debuggers. Only TEST/SBWTCK (pin 23) and RST/NMI/SBWTDIO (pin 24) are required - significantly reducing debug footprint compared to 4-pin JTAG. SBW supports full flash programming, real-time debugging, and EnergyTrace++ power profiling directly through these two pins.

Is the MSP430FR69891IPNR pin-compatible with other devices in the MSP430FR69xx family?

Yes, the MSP430FR69891IPNR in the 80-pin LQFP (PN) package shares identical pinout and electrical characteristics with MSP430FR6989IPN, MSP430FR6988IPN, and MSP430FR6987IPN - enabling hardware reuse across FRAM capacity variants. All share the same peripheral mapping, voltage ratings, and timing specifications, allowing drop-in replacement based on memory size requirements without PCB redesign.

MSP430FR69891IPNR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 80-LQFP

Series:: MSP430™ FRAM

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Core Processor:: MSP430 CPUXV2

Core Size:: 16-Bit

Speed:: 16MHz

Connectivity:: I2C, IrDA, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT

Number of I/O:: 63

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FRAM

EEPROM Size:: -

RAM Size:: 2K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 12x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430FR69891IPNR FAQ

1.How can I place an order for MSP430FR69891IPNR through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430FR69891IPNR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MSP430FR69891IPNR reliable?

The price and inventory of MSP430FR69891IPNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR69891IPNR is usually 5 days.

3.What payment methods are accepted for MSP430FR69891IPNR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR69891IPNR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430FR69891IPNR?

MSP430FR69891IPNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430FR69891IPNR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MSP430FR69891IPNR?

For technical support, including MSP430FR69891IPNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR69891IPNR requirements.

6.How does Aetrix verify that MSP430FR69891IPNR is sourced from the original manufacturer or authorized distributors?

All MSP430FR69891IPNR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430FR69891IPNR meets industry standards.

7.What is the process for return or replacement of MSP430FR69891IPNR?

All MSP430FR69891IPNR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR69891IPNR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MSP430FR69891IPNR part is unused and in its original packaging.

Return procedure for MSP430FR69891IPNR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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