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Texas Instruments MSP430FR5849IRHAR
- Part No.:
- MSP430FR5849IRHAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR5849IRHAR.pdf
- Description:
- IC MCU 16BIT 64KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,052
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Product details
Overview
MSP430FR5849IRHAR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 64KB nonvolatile memory, 2KB RAM, and integrated 12-bit ADC (14 external + 2 internal channels), RTC, and dual eUSCI modules (UART/IrDA/SPI + I²C/SPI). It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes requiring long-term data logging and real-time clock functionality.
For engineers reviewing the MSP430FR5849IRHAR datasheet, MSP430FR5849IRHAR pinout, MSP430FR5849IRHAR application, or MSP430FR5849IRHAR equivalent, key selection criteria include LFXT-only clock support, 40-pin VQFN (RHA) package, 0.25 µA RTC current in LPM3.5, FRAM endurance (10¹⁵ writes), and capacitive touch I/O capability on all pins without external components.
Technical Context
The MSP430FR5849IRHAR implements the CPUXV2 16-bit RISC core with hardware multiplier and three-channel DMA, enabling efficient signal processing in energy-constrained environments. Its clock system supports DCO and low-frequency crystal (LFXT) only - no HFXT - limiting maximum system frequency to 16 MHz via DCO while retaining precise RTC timing via 32-kHz crystal.
Peripherals include five 16-bit timers (TA0–TA3, TB0), 16-channel analog comparator, CRC16 engine, and eUSCI_A0/eUSCI_A1 (UART/IrDA/SPI) plus eUSCI_B0 (I²C/SPI). All I/O pins support capacitive touch sensing and edge-selectable wake-up from LPMx.5 modes, making it suitable for intermittent-sensing applications with sub-µA standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | CPUXV2 16-bit RISC with 32-bit hardware multiplier - enables fast math for sensor fusion and control loops |
| FRAM Capacity | 64 KB unified nonvolatile memory - eliminates write wear-out concerns and enables frequent data logging |
| ADC Resolution | 12-bit SAR with 14 external + 2 internal analog inputs - supports multi-sensor analog front-end integration |
| RTC Accuracy | Real-time clock with calendar/alarm, clocked by 32-kHz crystal - provides timestamping with ±1 ppm stability at 25°C |
| Low-Power Mode LPM3.5 | 0.25 µA typical current - enables years of operation on coin-cell batteries when RTC is active and CPU is off |
| Supply Voltage Range | 1.8 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, and alkaline battery systems |
| Capacitive Touch | All I/O pins support CTSIO without external components - reduces BOM cost and PCB area for user interface |
Pinout & Package
VQFN-40 (RHA) package, 6 mm × 6 mm, 0.4 mm pitch, exposed thermal pad (recommended connection to DVSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0/C0/VREF-/VeREF- | Multi-function I/O | Primary RTC calibration output and ADC channel 0 input - critical for time-stamped sensor readings |
| PJ.4/LFXIN & PJ.5/LFXOUT | Crystal oscillator terminals | Dedicated 32-kHz crystal interface for RTC - no internal load caps required; supports 3.7-pF crystal |
| RST/NMI/SBWTDIO | Reset & debug I/O | Unified reset pin with Spy-Bi-Wire debug interface - enables in-system programming and low-pin-count debugging |
| P2.0/TB0.6/UCA0TXD/UCA0SIMO/TB0CLK/ACLK | Multi-function I/O | Default UART TX and ACLK output - simplifies clock distribution and serial communication routing |
| DVCC & DVSS | Power supply | Digital core supply (DVCC) and ground (DVSS) - must be decoupled with 100 nF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 64 KB unified memory with 125 ns write speed and 10¹⁵ endurance - enables reliable firmware updates and cyclic data buffering |
| Ultra-Low-Power RTC | 0.25 µA in LPM3.5 mode with calendar/alarm - supports wake-on-interval or wake-on-event without host CPU intervention |
| Capacitive Touch I/O | All 33 GPIO pins support CTSIO - eliminates dedicated touch controller IC and external RC networks |
| eUSCI Peripherals | eUSCI_A0/A1 (UART/IrDA/SPI) + eUSCI_B0 (I²C/SPI) - allows simultaneous sensor bus (I²C) and host interface (UART) without software bit-banging |
| 3-Channel DMA | Hardware-accelerated data movement between ADC, FRAM, and peripherals - reduces CPU load during burst sampling |
Applications
| Smart Utility Metering | Energy-Harvesting Sensor Node |
|---|---|
Use Scenario: Gas/water meter with hourly pulse counting, temperature compensation, and tamper detection. IC Role / Device Role / Timing Role: Primary MCU managing metrology ADC, RTC-based billing intervals, and secure data storage in FRAM. Use Value: 0.25 µA RTC current extends 10-year battery life; FRAM enables 100% reliable daily log writes without wear leveling. | Use Scenario: Solar-powered environmental monitor measuring temperature, humidity, and light every 5 minutes. IC Role / Device Role / Timing Role: System controller with duty-cycled sensing, RF wakeup, and timestamped FRAM logging. Use Value: LPM3.5 + RTC enables precise 5-minute wake intervals; FRAM retains logs across power loss from intermittent harvesting. |
| Wearable Health Monitor | Industrial Data Logger |
Use Scenario: Wrist-worn device capturing heart rate via photoplethysmography (PPG) and motion via accelerometer. IC Role / Device Role / Timing Role: Signal processor with analog front-end control, motion-triggered sampling, and local data aggregation. Use Value: All-pin capacitive touch enables buttonless UI; 12-bit ADC resolves small PPG signal variations without external amplifiers. | Use Scenario: DIN-rail mounted logger recording voltage, current, and temperature in HVAC control panels. IC Role / Device Role / Timing Role: Standalone data acquisition unit with isolated RS-485 interface and local FRAM buffer. Use Value: eUSCI_B0 I²C interfaces with isolated ADCs; UART (eUSCI_A0) connects to Modbus RTU master; FRAM ensures no data loss during brownouts. |
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 |
|---|---|---|---|
| MSP430FR5847IRHAR | 32 KB FRAM, 1 KB RAM, same 40-pin RHA package and LFXT-only clock system | Lower memory capacity limits firmware complexity and data buffer depth | Select when application requires <32 KB code+data space and lower cost is prioritized over future scalability |
| MSP430FR5859IRHAR | 64 KB FRAM, 2 KB RAM, but supports HFXT (no LFXT) - lacks RTC_B module and 32-kHz crystal interface | Incompatible with RTC-dependent applications; requires high-frequency crystal for timing | Select only for non-RTC applications needing higher-frequency crystal timing or faster ADC sampling rates enabled by HFXT |
Compared with MSP430FR5847IRHAR, the MSP430FR5849IRHAR doubles FRAM and RAM for larger firmware and longer data retention; compared with MSP430FR5859IRHAR, it retains full RTC functionality via LFXT but sacrifices HFXT flexibility - critical for time-sensitive industrial logging.
Availability
MSP430FR5849IRHAR is available at Aetrix Electronics and suitable for smart metering, energy-harvested sensor nodes, and wearable electronics requiring stable component supply, long-term lifecycle support, and consistent FRAM reliability.
Supply support for MSP430FR5849IRHAR 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 MSP430FR58xx family is designed for ultra-low-power sensing and measurement applications where extended battery life, nonvolatile data integrity, and integrated analog peripherals reduce system complexity.
FAQ
What is the maximum operating frequency of the MSP430FR5849IRHAR?
The MSP430FR5849IRHAR supports up to 16 MHz via its factory-trimmed DCO oscillator. It does not include an HFXT oscillator, so external high-frequency crystals are not supported. The DCO provides stable timing for active-mode processing, while the separate 32-kHz LFXT drives the RTC independently - ensuring accurate timekeeping without compromising CPU performance.
Does the MSP430FR5849IRHAR support hardware UART bootloading?
Yes, the MSP430FR5849IRHAR includes a hardware UART bootloader (BSL) accessible via P2.0 (BSLTX) and P2.1 (BSLRX). This enables field firmware updates over serial interface without requiring JTAG hardware. The BSL is protected by password and supports memory read/write/erase operations, and is activated by holding specific pins during reset - fully documented in the MSP430FR58xx Family User's Guide.
Can the MSP430FR5849IRHAR operate without an external crystal?
Yes, the MSP430FR5849IRHAR can operate using only its internal DCO and VLO oscillators for general-purpose timing. However, the RTC_B module requires an external 32-kHz crystal connected to PJ.4/LFXIN and PJ.5/LFXOUT to achieve calendar accuracy. Without the crystal, RTC functions are unavailable, though the device remains fully functional for non-time-critical applications.
How many analog input channels does the ADC12_B module support on the MSP430FR5849IRHAR?
The ADC12_B module on the MSP430FR5849IRHAR supports 14 external analog input channels (A0–A15 excluding A6 and A7) plus 2 internal references (VeREF+ and VeREF−), totaling 16 selectable inputs. Channel mapping is fixed per pin assignment (e.g., P1.0 = A0, P1.1 = A1), and all channels share the same 12-bit SAR architecture with programmable sample-and-hold timing and internal reference options.
Is the MSP430FR5849IRHAR pin-compatible with other devices in the MSP430FR58xx family?
The MSP430FR5849IRHAR in the 40-pin RHA package is pin-compatible with MSP430FR5847IRHAR and MSP430FR5848IRHAR within the same RHA footprint. It is not pin-compatible with RGZ (48-pin) or DA (38-pin) variants due to differing pin counts and signal allocations. Pin compatibility is limited to same-package variants sharing identical terminal numbering and function mapping per Table 4-1 in the datasheet.
MSP430FR5849IRHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-VFQFN Exposed Pad
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- 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:
- 33
- Program Memory Size:
- 64KB (64K 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 14x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5849IRHAR FAQ
1.How can I place an order for MSP430FR5849IRHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5849IRHAR 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 MSP430FR5849IRHAR reliable?
The price and inventory of MSP430FR5849IRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5849IRHAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5849IRHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5849IRHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5849IRHAR?
MSP430FR5849IRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5849IRHAR 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 MSP430FR5849IRHAR?
For technical support, including MSP430FR5849IRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5849IRHAR requirements.
6.How does Aetrix verify that MSP430FR5849IRHAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5849IRHAR 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 MSP430FR5849IRHAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5849IRHAR?
All MSP430FR5849IRHAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5849IRHAR, 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 MSP430FR5849IRHAR part is unused and in its original packaging.
Return procedure for MSP430FR5849IRHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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