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Texas Instruments MSP430FR5737IDAR
- Part No.:
- MSP430FR5737IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR5737IDAR.pdf
- Description:
- IC MCU 16BIT 16KB FRAM 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,035
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Product details
Overview
MSP430FR5737IDAR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 16KB ferroelectric RAM (FRAM), 24-MHz CPU, 16-channel analog comparator, and dual eUSCI modules supporting UART/IrDA/SPI/I²C. It operates from 2 V to 3.6 V across –40°C to 85°C and targets battery-powered sensor management and data acquisition systems requiring nonvolatile memory endurance and real-time clock functionality.
For engineers reviewing the MSP430FR5737IDAR datasheet, MSP430FR5737IDAR pinout, MSP430FR5737IDAR application, or MSP430FR5737IDAR equivalent, key selection criteria include FRAM write endurance (10¹⁵ cycles), RTC calendar support in LPM3.5 (1.5 µA), integrated 32-bit hardware multiplier, five 16-bit timers with capture/compare, and 32 I/O pins in the 40-pin RHA package.
Technical Context
The MSP430FR5737IDAR implements the MSP430xV2 CPU core with seven low-power modes, including LPM4.5 (0.32 µA shutdown) and RTC-enabled LPM3.5. Its FRAM architecture replaces traditional flash and SRAM, enabling simultaneous read/write, error correction coding (ECC), and memory protection unit (MPU) enforcement for secure code/data storage.
Analog subsystem includes a 16-channel comparator with programmable hysteresis and internal reference, while digital peripherals feature three-channel DMA, 16-bit CRC engine, and dual enhanced universal serial communication interfaces-eUSCI_A0/A1 (UART/IrDA/SPI) and eUSCI_B0 (I²C/SPI)-with hardware bootloader (BSL) support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU (MSP430xV2) with 24-MHz max clock - enables deterministic real-time control at ultra-low power. |
| Nonvolatile Memory | 16KB FRAM - supports 10¹⁵ write cycles, 125 ns/word write speed, ECC + MPU, unified program/data/storage space. |
| Supply Voltage Range | 2.0 V to 3.6 V - compatible with single-cell Li-ion, 2xAA, or regulated 3.3 V rails without external level shifting. |
| Low-Power Modes | LPM3.5 (RTC active): 1.5 µA typical - sustains calendar timekeeping and wake-up events during extended sleep. |
| Analog Peripherals | 16-channel analog comparator with internal reference and hysteresis; no ADC - optimized for threshold detection, not digitization. |
| Serial Interfaces | eUSCI_A0/A1: UART/IrDA/SPI; eUSCI_B0: I²C/SPI - dual independent channels enable concurrent sensor bus and host comms. |
| Package & Pins | 40-pin RHA VQFN (6 mm × 6 mm) with 32 GPIO - provides full peripheral access and thermal pad for industrial reliability. |
Pinout & Package
Package: 40-pin RHA VQFN (6 mm × 6 mm), thermally enhanced with exposed die pad connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | GPIO / Timer_A0 CCR1 / DMA trigger / RTC calibration / Comparator input | Primary RTC clock output pin; supports wake-up from LPMx.5; not connected to ADC (MSP430FR5737 has no ADC). |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | GPIO / Timer_A0 CCR2 / Timer_A1 clock / Comparator output | Comparator_D output channel; used for windowed threshold signaling; no ADC reference function on this device. |
| P1.2/TA1.1/TA0CLK/CDOUT/A2*/CD2 | GPIO / Timer_A1 CCR1 / Timer_A0 clock / Comparator output | Dual timer clock routing enables synchronized PWM generation; CDOUT supports active-high/low configurable polarity. |
| P1.3/TA1.2/UCB0STE/A3*/CD3 | GPIO / Timer_A1 CCR2 / eUSCI_B0 SPI slave enable / Comparator input | Enables daisy-chained SPI sensor networks; STE signal asserts only when UCB0 is configured as slave. |
| PJ.0/TDO/TB0OUTH/SMCLK/CD6 | JTAG test / Timer_B0 output high / SMCLK output / Comparator input | Shared debug and functional pin; TB0OUTH drives external logic; SMCLK output aids clock domain verification. |
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire data I/O | Single-wire debug interface eliminates need for full JTAG header; supports in-system programming without external voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 16KB unified memory with 10¹⁵ write endurance and 125 ns/word write - eliminates flash wear leveling and enables logging at sensor sampling rates. |
| Real-Time Clock (RTC_B) | Calendar mode with alarm, LPM3.5 current of 1.5 µA - maintains accurate time across multi-year deployments without battery replacement. |
| Comparator_D Module | 16-channel analog comparator with programmable hysteresis and internal reference - supports precision threshold detection for battery monitoring or intrusion sensing. |
| Enhanced Serial Interfaces | eUSCI_A0/A1 (UART/IrDA/SPI) + eUSCI_B0 (I²C/SPI) - enables concurrent wired (I²C sensor hub) and wireless (UART to BLE module) communication paths. |
| Power Management | Integrated LDO, zero-power brownout detection, and supply voltage supervisor - ensures robust operation during battery voltage sag without external supervisors. |
Applications
| Smart Meter Tamper Detection | Industrial Sensor Node |
|---|---|
Use Scenario: Detect physical enclosure breach or magnetic interference in utility meters using discrete reed switches or Hall sensors. IC Role / Device Role / Timing Role: MSP430FR5737IDAR acts as tamper event processor and secure log keeper, using Comparator_D inputs to monitor sensor states and RTC_B to timestamp events. Use Value: FRAM stores tamper logs with 10¹⁵-cycle endurance and instant write capability - no data loss during power interruption or rapid event bursts. |
Use Scenario: Monitor temperature, humidity, and vibration in factory equipment using analog sensors feeding into comparator thresholds. IC Role / Device Role / Timing Role: MSP430FR5737IDAR serves as autonomous sensor arbitrator, triggering alerts via eUSCI_B0 I²C to MCU host only upon threshold violation. Use Value: 16-channel Comparator_D with hysteresis eliminates false triggers from noise; LPM3.5 RTC enables scheduled wake-ups every 10 seconds with 1.5 µA quiescent draw. |
| Wireless Building Automation Controller | Low-Power Data Logger |
Use Scenario: Central node in HVAC system collecting zone-level occupancy and ambient data via wired sensor buses. IC Role / Device Role / Timing Role: MSP430FR5737IDAR functions as protocol translator and local decision engine, using eUSCI_A0 for UART-based RS-485 sensor polling and eUSCI_B0 for I²C-connected display. Use Value: Dual eUSCI modules operate independently - no software arbitration needed; FRAM stores configuration and last-known state for fast recovery after brownout. |
Use Scenario: Standalone environmental logger recording door-open events, light exposure, or temperature excursions over months. IC Role / Device Role / Timing Role: MSP430FR5737IDAR operates in LPM4.5 (0.32 µA) between RTC alarms, waking to sample comparators and append timestamps to FRAM log. Use Value: Calendar-mode RTC_B with alarm interrupts enables precise 1-minute or 1-hour sampling intervals; FRAM retention exceeds 10 years at 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5739IDAR | Includes 12-channel 10-bit ADC (200 ksps) and additional I/O; same FRAM size, clock, and package. | Required where analog sensor digitization (e.g., thermistor voltage) is needed alongside comparator-based thresholding. | Select MSP430FR5739IDAR only if ADC functionality is mandatory; MSP430FR5737IDAR reduces BOM cost and firmware complexity when ADC is unused. |
| MSP430FR5969IPM | Higher FRAM (64KB), integrated LCD driver, different package (80-pin LQFP); no RTC_B calendar mode in base config. | Suitable for human-interface devices with display, but lacks native calendar RTC and uses larger footprint. | MSP430FR5969IPM offers scalability for future feature expansion, but requires PCB redesign and does not match MSP430FR5737IDAR's RTC/calendar timing precision. |
Compared with MSP430FR5739IDAR, the MSP430FR5737IDAR removes ADC circuitry to reduce dynamic power and cost while retaining identical FRAM, RTC_B calendar, comparator count, and low-power performance - making it optimal for pure threshold-detection applications. Against MSP430FR5969IPM, it trades LCD support and memory headroom for smaller size, lower system cost, and guaranteed RTC calendar compliance.
Availability
MSP430FR5737IDAR is available at Aetrix Electronics and suitable for smart meter tamper detection, industrial sensor nodes, and wireless building automation controllers requiring stable component supply, long-term lifecycle assurance, and TI-qualified FRAM reliability.
Supply support for MSP430FR5737IDAR 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, embedded processing, and connectivity solutions with emphasis on energy efficiency, reliability, and system integration.
The MSP430FR573x product line was designed specifically for ultra-low-power sensing and system management in battery-operated infrastructure applications - prioritizing FRAM endurance, RTC accuracy, and comparator-rich analog front ends over raw compute throughput.
FAQ
What is the maximum operating frequency of the MSP430FR5737IDAR?
The MSP430FR5737IDAR supports a maximum system clock frequency of 24 MHz, achieved via its factory-trimmed DCO oscillator or external HFXT crystal. This allows deterministic real-time execution of time-critical tasks such as comparator response handling and UART frame timing, while maintaining compatibility with TI's MSP430 toolchain and Code Composer Studio™ IDE.
Does the MSP430FR5737IDAR include an analog-to-digital converter (ADC)?
No, the MSP430FR5737IDAR does not include an ADC. As confirmed in the Device Comparison table (Table 3-1), MSP430FR5737 has "–" under the ADC10_B column, distinguishing it from variants like MSP430FR5739IDAR. Its analog capability is limited to the 16-channel Comparator_D module with internal reference and hysteresis - intended for threshold detection, not digitization.
What package type is used for the MSP430FR5737IDAR?
The MSP430FR5737IDAR uses the 40-pin RHA VQFN package (6 mm × 6 mm) with an exposed thermal pad. This package is shared with MSP430FR5739IDAR and MSP430FR5735IDAR, and supports full pin access including all 32 GPIOs, dual eUSCI modules, RTC_B, and Comparator_D inputs - validated in Figures 4-1 and Table 4-1 of the SLAS639L datasheet.
How does FRAM memory in the MSP430FR5737IDAR differ from traditional flash in terms of endurance and speed?
The MSP430FR5737IDAR's 16KB FRAM offers 10¹⁵ write cycles - orders of magnitude higher than typical flash (10⁴–10⁵ cycles) - and performs writes in 125 ns per 16-bit word (16KB in ~1 ms). Unlike flash, FRAM supports true simultaneous read/write and requires no erase-before-write, enabling reliable data logging even during power interruptions or high-frequency sensor events.
Can the MSP430FR5737IDAR operate from a single 2.0-V supply?
Yes, the MSP430FR5737IDAR is fully specified to operate across 2.0 V to 3.6 V, as stated in Section 5.3 (Recommended Operating Conditions) of the SLAS639L datasheet. Its integrated LDO and supply voltage supervisor ensure stable core voltage and reset behavior down to 2.0 V, making it suitable for direct connection to aging alkaline or lithium primary cells without external regulation.
MSP430FR5737IDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 38-TSSOP (0.240", 6.10mm Width)
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 30
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5737IDAR FAQ
1.How can I place an order for MSP430FR5737IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5737IDAR 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 MSP430FR5737IDAR reliable?
The price and inventory of MSP430FR5737IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5737IDAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5737IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5737IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5737IDAR?
MSP430FR5737IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5737IDAR 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 MSP430FR5737IDAR?
For technical support, including MSP430FR5737IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5737IDAR requirements.
6.How does Aetrix verify that MSP430FR5737IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5737IDAR 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 MSP430FR5737IDAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5737IDAR?
All MSP430FR5737IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5737IDAR, 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 MSP430FR5737IDAR part is unused and in its original packaging.
Return procedure for MSP430FR5737IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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