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Texas Instruments MSP430FR5735IDAR
- Part No.:
- MSP430FR5735IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR5735IDAR.pdf
- Description:
- IC MCU 16BIT 8KB FRAM 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
MSP430FR5735IDAR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8KB FRAM nonvolatile memory, 1KB RAM, 24-MHz system clock, 12-channel 10-bit ADC, and 16-channel analog comparator - deployed in battery-powered sensor nodes for industrial monitoring and smart metering.
For engineers reviewing the MSP430FR5735IDAR datasheet, MSP430FR5735IDAR pinout, MSP430FR5735IDAR application, or MSP430FR5735IDAR equivalent, key selection criteria include FRAM endurance (1015 write cycles), RTC with crystal support in LPM3.5 (1.5 µA), active-mode current (81.4 µA/MHz), and TSSOP-38 package compatibility with legacy MSP430FR57xx layouts.
Technical Context
The MSP430FR5735IDAR implements a CPUXV2 core with hardware multiplier and three-channel DMA, enabling deterministic real-time processing in low-power modes. Its FRAM memory architecture eliminates erase-before-write latency and supports simultaneous read/write operations without wear leveling overhead.
It integrates dual eUSCI modules: eUSCI_A0/A1 supporting UART (with auto-baud detection), IrDA, and SPI; eUSCI_B0 supporting I²C (multi-slave addressing) and SPI. The RTC_B module includes calendar, alarm, and crystal oscillator support for timekeeping in LPM3.5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| FRAM Size | 8 KB nonvolatile memory with 125 ns/word write speed and 1015 write-cycle endurance - enables frequent data logging without flash wear-out concerns. |
| ADC Resolution | 10-bit SAR ADC with 12 external + 2 internal channels, 200 ksps sampling at 100 µA - suitable for multi-sensor analog front-end acquisition. |
| Low-Power Modes | LPM3.5 (RTC + 32-kHz crystal): 1.5 µA typical; LPM4.5 (shutdown): 0.32 µA - extends coin-cell battery life to >10 years in periodic wake-up applications. |
| Operating Voltage | 2.0 V to 3.6 V supply range - compatible with single-cell Li-ion, Li-SOCl₂, and two-cell alkaline systems without external regulators. |
| Clock Sources | DCO (up to 24 MHz), VLO (10 kHz), LFXT (32 kHz crystal), HFXT (up to 16 MHz) - supports precise timing and dynamic frequency scaling across power modes. |
| I/O Count | 30 GPIO pins in TSSOP-38 package, including Schmitt-trigger inputs and programmable pull-ups/downs - simplifies direct interfacing with switches, sensors, and LEDs. |
| Peripherals | Five 16-bit timers (TA0/TA1/TB0/TB1/TB2), 16-channel comparator with hysteresis, CRC-16 engine, and MPU - enables sensor signal conditioning, PWM control, and secure firmware updates. |
Pinout & Package
TSSOP-38 (DA) package: 12.5 mm × 6.2 mm body, exposed thermal pad recommended to be connected to DVSS for thermal management and noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire debug input | Single-pin reset and 2-wire JTAG-compatible debugging interface - reduces PCB footprint and enables in-system programming without dedicated JTAG header. |
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function GPIO | Supports timer capture, DMA trigger, RTC calibration output, ADC channel A0 input, comparator CD0, and negative reference voltage - consolidates timing, sensing, and signal conditioning on one pin. |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | Multi-function GPIO | Enables TA0 compare output, TA1 clock source, comparator output, ADC channel A1 input, comparator CD1, and positive reference voltage - ideal for precision analog measurement chains. |
| eUSCI_A0 (P1.4–P1.5, P2.0–P2.1) | UART/IrDA/SPI interface | Hardware UART with automatic baud-rate detection and IrDA encoding - eliminates software UART overhead and enables robust wireless IR communication. |
| eUSCI_B0 (P1.3, P1.6–P1.7, PJ.0–PJ.3) | I²C/SPI interface | Full I²C master/slave with multi-address support and clock-stretching tolerance - interoperates with industry-standard sensors and EEPROMs without bit-banging. |
Key Features
| Feature | Design Value |
|---|---|
| FRAM Memory Architecture | 8 KB unified program/data/storage memory with ECC and MPU - eliminates separate code/data memory partitions and enables atomic firmware updates. |
| Ultra-Low-Power RTC | Real-time clock with calendar and alarm functions operating at 1.5 µA in LPM3.5 using 32-kHz crystal - delivers accurate timekeeping during extended sleep without external RTC IC. |
| Hardware Acceleration | 32-bit hardware multiplier and 16-bit CRC engine - accelerates cryptographic checksums and math-intensive sensor fusion algorithms in <1 µs. |
| Analog Integration | 16-channel comparator with programmable hysteresis and internal voltage reference - enables zero-crossing detection, threshold monitoring, and battery voltage supervision without external components. |
| Power Management | Fully integrated LDO, supply voltage supervisor, and zero-power brownout detection - ensures reliable operation across battery discharge curves without external supervisors. |
Applications
| Smart Utility Metering | Industrial Sensor Node |
|---|---|
Use Scenario: Two-way communication and tamper detection in electricity/water/gas meters with 10+ year battery life. IC Role / Device Role / Timing Role: Primary MCU managing metrology ADC, pulse counting, RF/PLC communication, and secure firmware updates via BSL. Use Value: FRAM enables daily encrypted log storage without wear degradation; RTC maintains billing timestamps during mains outage. | Use Scenario: Wireless temperature/humidity/pressure node in factory floor or HVAC ducts with intermittent BLE/Wi-Fi upload. IC Role / Device Role / Timing Role: Sensor aggregator executing wake-on-event, analog acquisition, digital filtering, and low-power radio handshaking. Use Value: 0.32 µA LPM4.5 shutdown extends AA battery life beyond 5 years; 100 µA ADC enables high-resolution readings per wake cycle. |
| Home Automation Hub | Asset Tracking Beacon |
Use Scenario: Battery-powered Zigbee/Z-Wave coordinator bridging legacy wired sensors to cloud platforms. IC Role / Device Role / Timing Role: Central controller handling protocol translation, local decision logic, and secure OTA updates. Use Value: Dual eUSCI modules support concurrent I²C (sensor bus) and UART (radio module) without software arbitration delays. | Use Scenario: GPS-denied indoor asset tracker logging location via BLE beacons and accelerometer motion triggers. IC Role / Device Role / Timing Role: Motion-triggered logger capturing timestamped orientation and ambient light data into FRAM. Use Value: 1015 FRAM write cycles support continuous 100 Hz sampling for >30 years; LPM3.5 RTC wakes device every 15 min for beacon scan. |
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 |
|---|---|---|---|
| MSP430FR5739IDAR | 16 KB FRAM, same peripherals and pinout in TSSOP-38 - differs only in FRAM capacity and ADC channel count (12 ext/2 int vs. 12 ext/2 int). | Identical use cases but supports larger firmware images and more persistent data buffers. | Select when firmware size exceeds 8 KB or long-term data logging requires >8 KB buffer space. |
| MSP430FR2476TPTR | 16 KB FRAM, 64 MHz FRAM-optimized CPU, fewer analog resources (8-ch ADC, no comparator), TSSOP-48 - not pin-compatible. | Better suited for compute-heavy tasks (e.g., FFT-based vibration analysis); lacks comparator-driven event wakeup. | Choose for higher throughput needs where analog peripheral count is secondary to processing speed. |
Compared with MSP430FR5739IDAR, the MSP430FR5735IDAR trades 8 KB FRAM capacity for identical low-power performance and analog integration in the same footprint; versus MSP430FR2476TPTR, it prioritizes analog richness and sub-µA RTC over raw CPU speed and package size.
Availability
MSP430FR5735IDAR is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, home automation hubs, and asset tracking beacons requiring stable component supply and long-term lifecycle assurance.
Supply support for MSP430FR5735IDAR 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 MSP430FR57xx family was designed specifically for ultra-low-power sensing and system management in building automation, smart grid infrastructure, and battery-operated industrial IoT endpoints.
FAQ
What is the maximum system clock frequency supported by the MSP430FR5735IDAR?
The MSP430FR5735IDAR supports a maximum system clock frequency of 24 MHz via its digitally controlled oscillator (DCO). This frequency is factory-trimmed across six selectable settings and can be dynamically adjusted during runtime to balance performance and power consumption. The DCO operates independently of external crystals, enabling fast wake-up from low-power modes without crystal stabilization delay - critical for duty-cycled sensor applications where the MSP430FR5735IDAR must process data within tight time windows.
Does the MSP430FR5735IDAR include hardware support for secure firmware updates?
Yes, the MSP430FR5735IDAR includes hardware-assisted security features essential for secure firmware updates: a built-in memory protection unit (MPU) enforces privilege-level access to FRAM regions, and the boot ROM contains a hardware UART bootloader (BSL) that supports password-protected, encrypted firmware loading over UART without requiring external programming hardware. These capabilities allow field-upgradable firmware while preventing unauthorized code execution - a requirement verified in TI's MSP430FR57xx Family User's Guide and confirmed in the SLAS639L datasheet section 6.6.
How does the FRAM memory in the MSP430FR5735IDAR differ from traditional flash in terms of endurance and write speed?
The MSP430FR5735IDAR's 8 KB FRAM offers 1015 write cycles - 100,000× greater than typical flash - and performs writes at 125 ns per 16-bit word (8 KB in ~1 ms), with no erase-before-write requirement. Unlike flash, FRAM supports true simultaneous read/write and retains data without power. This eliminates wear-leveling firmware overhead and enables deterministic logging in time-critical applications - directly validated in the SLAS639L datasheet sections 1.1 and 5.36.
Can the MSP430FR5735IDAR operate from a single 2.0-V supply, and what is its active-mode current consumption?
Yes, the MSP430FR5735IDAR operates across a 2.0-V to 3.6-V supply range, making it compatible with single-cell lithium chemistries and energy-harvesting sources. At 24 MHz and 3.0 V, its typical active-mode current is 81.4 µA/MHz - translating to ~1.95 mA total. This value is measured under specified conditions in the SLAS639L datasheet section 5.4 and enables sustained computation during brief wake periods in battery-constrained designs.
What development tools are officially supported for the MSP430FR5735IDAR?
Texas Instruments officially supports Code Composer Studio™ IDE (free professional edition), the MSP-EXP430FR5739 LaunchPad development kit (pin-compatible with MSP430FR5735IDAR in TSSOP-38), and the MSP-FET430U40A full-featured emulator. These tools provide full debug visibility, FRAM-aware programming, and low-power mode profiling - documented in the SLAS639L datasheet section 1.1 and TI's MSP430FR57xx product folder. The MSP430FR5735IDAR shares toolchain compatibility with the entire MSP430FR57xx family.
MSP430FR5735IDAR 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:
- Active
- 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:
- 8KB (8K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 14x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR5735IDAR FAQ
1.How can I place an order for MSP430FR5735IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5735IDAR 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 MSP430FR5735IDAR reliable?
The price and inventory of MSP430FR5735IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5735IDAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5735IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5735IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5735IDAR?
MSP430FR5735IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5735IDAR 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 MSP430FR5735IDAR?
For technical support, including MSP430FR5735IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5735IDAR requirements.
6.How does Aetrix verify that MSP430FR5735IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5735IDAR 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 MSP430FR5735IDAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5735IDAR?
All MSP430FR5735IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5735IDAR, 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 MSP430FR5735IDAR part is unused and in its original packaging.
Return procedure for MSP430FR5735IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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