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Texas Instruments MSP430FR68891IPN
- Part No.:
- MSP430FR68891IPN
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
MSP430FR68891IPN.pdf
- Description:
- IC MCU 16BIT 128KB FRAM 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
MSP430FR68891IPN from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller featuring 128KB nonvolatile FRAM, 2KB RAM, 12-bit ADC with 16 external channels, integrated LCD driver supporting up to 320 segments, and real-time clock with calendar/alarm. It operates from 1.8 V to 3.6 V and delivers 100 µA/MHz active current, targeting battery-powered metering applications requiring long-term data retention and low-energy operation.
For engineers reviewing the MSP430FR68891IPN datasheet, MSP430FR68891IPN pinout, MSP430FR68891IPN application, or MSP430FR68891IPN equivalent, key selection criteria include FRAM endurance (1015 write cycles), LPM3.5 RTC current (0.35 µA), 80-pin LQFP package compatibility, and dual eUSCI_A/eUSCI_B peripherals supporting UART/IrDA/SPI/I²C in mixed-signal industrial sensing designs.
Technical Context
The MSP430FR68891IPN implements the MSP430 CPUXV2 core with 16 general-purpose registers and integrates a flexible clock system with DCO, LFXT (32 kHz crystal), and HFXT support. Its FRAM architecture enables byte-level writes without erase, eliminating flash wear-out concerns in frequent logging scenarios.
Peripherals include three 16-bit Timer_A modules (TA0/TA1/TA3), two Timer_B modules (TB0/TB1), 32-bit hardware multiplier, three-channel DMA, CRC16/CRC32 engines, and capacitive touch I/O on all ports P1–P10 and PJ - all operating within seven optimized low-power modes including LPM4.5 (0.02 µA shutdown).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit MSP430 CPUXV2 with 16 registers; enables deterministic real-time control and low-code-footprint firmware for resource-constrained metering systems. |
| Nonvolatile Memory | 128KB FRAM; supports unlimited write cycles (1015), instant write (<125 ns/word), unified memory space for code/data/storage - eliminates flash erase delays and wear leveling overhead. |
| ADC | 12-bit SAR ADC with internal reference and sample-and-hold; supports up to 16 external analog inputs - suitable for multi-sensor data acquisition in heat/water meters. |
| Low-Power Modes | LPM3.5 (RTC active): 0.35 µA typical; LPM4.5 (shutdown): 0.02 µA typical - extends battery life to >10 years in sealed utility meter deployments. |
| LCD Driver | Integrated LCD_C module driving up to 320 segments with contrast control; reduces BOM count by eliminating external display controllers in portable medical and cost-allocation devices. |
| Communication Interfaces | eUSCI_A0/A1 (UART/IrDA/SPI) + eUSCI_B0/B1 (I²C/SPI); dual independent serial subsystems enable simultaneous host communication and sensor bus management. |
| Package | 80-pin LQFP (12 mm × 12 mm); compatible with standard surface-mount assembly and provides 63 GPIOs plus dedicated LCD segment/common pins. |
Pinout & Package
Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, 0.5 mm pitch. Pinout validated per TI SLASE33C datasheet Figures 4-2 and Table 4-1 for MSP430FR687x/FR687x1 family - MSP430FR68891IPN shares identical pin mapping with MSP430FR68791IPN per TI device nomenclature and package addendum.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0–P1.7 | General-purpose I/O / TA0/TA1 timers / UCB0 / LCD seg | Multi-function port with capacitive touch capability; supports timer capture/compare, SPI/I²C, and LCD segment drive without external components. |
| P2.0–P2.7 | General-purpose I/O / UCA0 / TB0 / COM4–COM7 | Primary UART interface (UCA0TXD/RXD) and LCD backplane commons (COM4–COM7); enables direct connection to segmented displays. |
| P3.0–P3.7 | General-purpose I/O / UCA1 / UCB1 / TA1 / TB0 | Dual serial peripheral support: UCA1 (UART/SPI) and UCB1 (I²C/SPI); allows concurrent communication with host MCU and sensor networks. |
| P5.0–P5.7 | General-purpose I/O / TA1 / UCB1 / Sxx | Timer_A channel extension and secondary I²C/SPI signals; expands timing and bus connectivity for auxiliary functions like calibration triggers. |
| P6.0–P6.7 | General-purpose I/O / LCD common/segment / COUT / Rxx | LCD voltage rail control (R13/R23/LCDCAP) and COM0–COM3 outputs; configures analog LCD bias network for high-contrast static/mux displays. |
| PJ.0–PJ.5 | JTAG/SBW debug / HFXIN/HFXOUT / LFXIN/LFXOUT | Crystal oscillator connections for high- and low-frequency clocks; essential for RTC accuracy and system clock stability in metrology-grade applications. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 128KB unified memory with 1015 write endurance and 125 ns word write - enables reliable, high-frequency data logging without flash wear degradation. |
| Ultra-Low-Power Operation | 0.35 µA RTC mode (LPM3.5) and 0.02 µA shutdown (LPM4.5) - supports >10-year battery life in sealed water/heat meters with periodic wake-up intervals. |
| Integrated LCD Controller | Drives up to 320 segments with programmable contrast and static/2–8 mux support - eliminates external display drivers and reduces PCB area/cost. |
| Capacitive Touch I/O | All P1–P10 and PJ pins support CSD without external components - enables robust, low-cost user interfaces in portable medical and utility devices. |
| Dual eUSCI Modules | eUSCI_A0/A1 (UART/IrDA/SPI) + eUSCI_B0/B1 (I²C/SPI) - permits simultaneous host telemetry (UART) and sensor network control (I²C) without software arbitration. |
Applications
| Water Meters | Heat Cost Allocators |
|---|---|
Use Scenario: Ultrasonic or mechanical flow measurement with hourly consumption logging, tamper detection, and RF/IR pulse output. IC Role / Device Role / Timing Role: Primary system controller managing ADC sampling, FRAM-based data storage, RTC-timed wake-ups, and LCD display refresh. Use Value: FRAM enables infinite-cycle logging of time-stamped flow data; LPM3.5 RTC current ensures decade-long battery operation without maintenance. |
Use Scenario: Thermal energy allocation in multi-tenant buildings using temperature differential sensing and valve control via PWM outputs. IC Role / Device Role / Timing Role: Mixed-signal controller interfacing RTDs, driving solenoid valves, updating LCD with consumption metrics, and maintaining accurate calendar/time. Use Value: Integrated 12-bit ADC and LCD_C reduce component count; 0.35 µA RTC mode sustains operation during seasonal heating cycles with minimal power drain. |
| Portable Medical Meters | Data Logging Systems |
Use Scenario: Handheld blood glucose or oxygen saturation monitors requiring clinical-grade accuracy, button interface, and battery-backed data history. IC Role / Device Role / Timing Role: Sensor signal conditioning, capacitive touch button handling, FRAM-based patient record storage, and contrast-adjusted LCD rendering. Use Value: Capacitive touch I/O eliminates mechanical switches; FRAM guarantees reliable storage of critical health records across 100,000+ measurements. |
Use Scenario: Environmental monitoring nodes capturing temperature, humidity, and pressure at fixed intervals for cloud upload via LPWAN gateways. IC Role / Device Role / Timing Role: Autonomous data acquisition engine with RTC-triggered sampling, FRAM buffering, and low-power serial communication to gateway MCU. Use Value: Unified FRAM simplifies firmware design for circular buffer management; 32-bit CRC32 ensures data integrity during long-term unattended deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power FRAM microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR68791IPN | Same 128KB FRAM, 2KB RAM, and 80-pin LQFP package; differs only in bootloader type (UART BSL vs. I²C BSL in MSP430FR68891IPN). | Identical peripheral set and power profile; UART BSL preferred where host-side serial programming infrastructure exists. | Select MSP430FR68791IPN when UART-based field firmware updates are required; pinout and firmware binary are fully compatible. |
| MSP430FR6877IPN | 64KB FRAM (half capacity), otherwise identical architecture, package, and peripherals; same LPM currents and LCD/ADC specs. | Suitable for cost-sensitive or lower-data-volume applications where 64KB FRAM suffices for firmware + logs. | Choose MSP430FR6877IPN to reduce unit cost while retaining identical footprint, layout, and toolchain compatibility - no PCB changes needed. |
Compared with MSP430FR68791IPN, the MSP430FR68891IPN offers I²C-based bootloader for secure, low-pin-count programming; versus MSP430FR6877IPN, it doubles FRAM capacity for extended logging duration without compromising power or display capabilities.
Availability
MSP430FR68891IPN is available at Aetrix Electronics and suitable for water meters, heat cost allocators, and portable medical meters requiring stable component supply, long-term lifecycle assurance, and consistent FRAM performance across production batches.
Supply support for MSP430FR68891IPN 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 specializing in analog, embedded processing, and digital signal technologies, with decades of expertise in ultra-low-power microcontrollers and precision analog solutions.
The MSP430 ULP FRAM portfolio targets energy-constrained applications such as utility metering and portable instrumentation, combining ferroelectric memory reliability with holistic low-power architecture to eliminate flash limitations in battery-operated systems.
FAQ
What is the maximum operating frequency of the MSP430FR68891IPN?
The MSP430FR68891IPN supports up to 16 MHz system clock via its factory-trimmed DCO or external HFXT crystal. This frequency enables real-time signal processing in ADC-driven applications while maintaining sub-100 µA/MHz active current efficiency - critical for maintaining thermal stability in sealed meter enclosures.
Does the MSP430FR68891IPN support capacitive touch sensing without external components?
Yes, the MSP430FR68891IPN supports capacitive touch sensing on all P1–P10 and PJ I/O pins using its integrated CapTIvate™-compatible peripheral. No external RC networks or dedicated touch ICs are required - enabling robust, low-cost user interfaces in portable medical and utility meter designs.
What bootloader interface does the MSP430FR68891IPN use?
The MSP430FR68891IPN uses an I²C-based hardware bootloader (BSL), distinct from UART BSL variants like MSP430FR68791IPN. This allows secure, two-wire firmware updates using existing I²C infrastructure - ideal for systems with constrained pin count or where I²C is already deployed for sensor communication.
How many LCD segments can the MSP430FR68891IPN drive?
The MSP430FR68891IPN integrates the LCD_C module capable of driving up to 320 segments in static, 2-, 3-, 4-, 6-, or 8-mux configurations. Its dedicated segment and common outputs (e.g., P6.3/COM0, P6.4/COM1, P2.4/COM4) directly interface with custom glass LCDs used in heat cost allocators and portable meters.
Is the MSP430FR68891IPN pin-compatible with other MSP430FR68xx devices in 80-pin LQFP?
Yes, the MSP430FR68891IPN shares identical 80-pin LQFP (PN) pinout with MSP430FR68791IPN and MSP430FR6877IPN per TI's device comparison tables and pin diagrams. This enables drop-in replacement within the same package family for design flexibility and BOM rationalization across product tiers.
MSP430FR68891IPN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- MSP430™ FRAM
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, 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:
MSP430FR68891IPN FAQ
1.How can I place an order for MSP430FR68891IPN through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR68891IPN 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 MSP430FR68891IPN reliable?
The price and inventory of MSP430FR68891IPN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR68891IPN is usually 5 days.
3.What payment methods are accepted for MSP430FR68891IPN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR68891IPN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR68891IPN?
MSP430FR68891IPN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR68891IPN 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 MSP430FR68891IPN?
For technical support, including MSP430FR68891IPN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR68891IPN requirements.
6.How does Aetrix verify that MSP430FR68891IPN is sourced from the original manufacturer or authorized distributors?
All MSP430FR68891IPN 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 MSP430FR68891IPN meets industry standards.
7.What is the process for return or replacement of MSP430FR68891IPN?
All MSP430FR68891IPN units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR68891IPN, 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 MSP430FR68891IPN part is unused and in its original packaging.
Return procedure for MSP430FR68891IPN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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