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

Texas Instruments MSP430FR5735IRHAR

Name: MSP430FR5735IRHAR
Brand: Texas Instruments
SKU: MSP430FR5735IRHAR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430FR5735IRHAR

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 40-VFQFN Exposed Pad

Datasheet:: MSP430FR5735IRHAR.pdf

Description:: IC MCU 16BIT 8KB FRAM 40VQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MSP430FR5735IRHAR 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 home automation and security systems.

For engineers reviewing the MSP430FR5735IRHAR datasheet, MSP430FR5735IRHAR pinout, MSP430FR5735IRHAR application, or MSP430FR5735IRHAR 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 40-pin VQFN (RHA) package compatibility with TI's MSP-TS430RHA40A target board.

Technical Context

The MSP430FR5735IRHAR integrates a 16-bit CPUXV2 core with seven low-power modes, including LPM4.5 (0.32 µA shutdown) and RTC-enabled LPM3.5 (1.5 µA). Its FRAM architecture enables simultaneous read/write operations without erase cycles, supporting real-time data logging in energy-constrained environments.

Peripherals include dual eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), three 16-bit timers (Timer_A ×2, Timer_B ×3), 32-bit hardware multiplier, and CRC engine - all synchronized to a flexible clock system with DCO, VLO, LFXT, and HFXT sources.

Key Specifications

Parameter	Value and Actual Design Meaning
FRAM Size	8 KB - nonvolatile program/data storage with 10¹⁵ write endurance and 125 ns/word write speed
RAM Size	1 KB - volatile working memory for stack, variables, and DMA buffers
Max System Clock	24 MHz - supports high-throughput sensor sampling and real-time control loops
ADC Resolution	10-bit - 12 external + 2 internal channels at 200 ksps with 100-µA active consumption
Comparator Channels	16 - programmable hysteresis and internal voltage reference for threshold detection
Low-Power Mode LPM3.5	1.5 µA - RTC operation with 32-kHz crystal, enabling calendar-based wake-up without external timer
Active Current	81.4 µA/MHz - enables >10-year battery life in coin-cell-powered wireless sensors

Pinout & Package

Package: 40-pin VQFN (RHA), 6 mm × 6 mm, exposed thermal pad (recommended connection to DVSS).

Pin/Terminal	Circuit Role	Design Meaning
P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF-	Multi-function I/O	RTC calibration output, ADC input A0, comparator input CD0, and DMA trigger source
P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+	Multi-function I/O	ADC reference input VeREF+, comparator output CDOUT, and TA1 clock source
PJ.4/XIN & PJ.5/XOUT	Clock Input/Output	Connects 32-kHz crystal for RTC accuracy or high-frequency crystal for system clock
RST/NMI/SBWTDIO	Reset & Debug	Single-wire debug interface (SBW) and non-maskable interrupt input
TEST/SBWTCK	Debug Interface	Test clock for Spy-Bi-Wire programming and boundary scan
AVCC / AVSS / DVCC / DVSS	Power Supply	Separate analog/digital power domains with dedicated ground planes for noise isolation

Key Features

Feature	Design Value
Ferroelectric RAM (FRAM)	8 KB unified memory supporting simultaneous read/write, eliminating flash erase latency and wear leveling overhead
Real-Time Clock (RTC)	Calendar mode with alarm, powered in LPM3.5 at 1.5 µA using 32-kHz crystal - enables precise time-stamped sensor logging
eUSCI Peripherals	Two UART-capable eUSCI_A modules (with auto-baud detection) and one I²C/SPI eUSCI_B - simplifies multi-protocol sensor hub design
Ultra-Low-Power Modes	LPM4.5 consumes only 0.32 µA - ideal for long-term storage of configuration or event logs during deep sleep
Hardware CRC Engine	16-bit cyclic redundancy checker accelerates firmware integrity checks and data packet validation without CPU load

Applications

Smart Door Lock Sensor Node	Wireless Smoke Detector
Use Scenario: Battery-powered lock with tamper detection, keypad scanning, and BLE communication. IC Role / Device Role / Timing Role: Main controller managing keypad matrix, accelerometer-based tamper sensing, and secure FRAM-stored audit logs. Use Value: 8 KB FRAM retains 10,000+ door-open events with 10¹⁵ write cycles; RTC timestamps each entry without external timekeeping IC.	Use Scenario: UL-certified smoke detector with CO sensing, self-test, and low-power RF reporting. IC Role / Device Role / Timing Role: Analog front-end controller for dual-sensor signal conditioning and periodic self-calibration. Use Value: 16-channel comparator monitors reference voltage drift; 10-bit ADC digitizes photoelectric chamber output at 200 ksps with <100 µA draw.
Industrial Temperature Monitor	Energy Harvesting Sensor Tag
Use Scenario: DIN-rail mounted node measuring ambient and PCB temperature via thermistors and internal diode. IC Role / Device Role / Timing Role: Precision analog acquisition engine with programmable hysteresis on comparator outputs for over-temp alerts. Use Value: Comparator_D supports 16 independent thresholds; internal 1.2-V reference ensures stable trip points across –40°C to 85°C.	Use Scenario: Solar-harvested environmental sensor transmitting humidity/pressure data every 5 minutes. IC Role / Device Role / Timing Role: Power-aware system manager coordinating energy storage, measurement, and burst transmission. Use Value: LPM4.5 (0.32 µA) extends runtime between harvest cycles; FRAM writes survive intermittent power loss during capacitor recharge.

Smart Door Lock Sensor Node

Wireless Smoke Detector

Use Scenario: Battery-powered lock with tamper detection, keypad scanning, and BLE communication.

IC Role / Device Role / Timing Role: Main controller managing keypad matrix, accelerometer-based tamper sensing, and secure FRAM-stored audit logs.

Use Value: 8 KB FRAM retains 10,000+ door-open events with 10¹⁵ write cycles; RTC timestamps each entry without external timekeeping IC.

Use Scenario: UL-certified smoke detector with CO sensing, self-test, and low-power RF reporting.

IC Role / Device Role / Timing Role: Analog front-end controller for dual-sensor signal conditioning and periodic self-calibration.

Use Value: 16-channel comparator monitors reference voltage drift; 10-bit ADC digitizes photoelectric chamber output at 200 ksps with <100 µA draw.

Industrial Temperature Monitor

Energy Harvesting Sensor Tag

Use Scenario: DIN-rail mounted node measuring ambient and PCB temperature via thermistors and internal diode.

IC Role / Device Role / Timing Role: Precision analog acquisition engine with programmable hysteresis on comparator outputs for over-temp alerts.

Use Value: Comparator_D supports 16 independent thresholds; internal 1.2-V reference ensures stable trip points across –40°C to 85°C.

Use Scenario: Solar-harvested environmental sensor transmitting humidity/pressure data every 5 minutes.

IC Role / Device Role / Timing Role: Power-aware system manager coordinating energy storage, measurement, and burst transmission.

Use Value: LPM4.5 (0.32 µA) extends runtime between harvest cycles; FRAM writes survive intermittent power loss during capacitor recharge.

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
MSP430FR5739IRHAR	16 KB FRAM, same 40-pin RHA package, identical peripherals and clock architecture	Supports larger firmware images and extended data logging buffers	Select when >8 KB nonvolatile storage is required without changing PCB layout
MSP430FR5735IDA	Same core specs but 38-pin TSSOP (DA) package; no P3.x or P4.x I/O banks	Fewer GPIOs (30 vs. 32), no P3.0–P3.3 analog inputs or comparator channels CD12–CD15	Choose for cost-sensitive designs where reduced I/O count and larger footprint are acceptable

Compared with MSP430FR5739IRHAR, the MSP430FR5735IRHAR trades 8 KB FRAM capacity for identical ultra-low-power performance and pin-compatible layout; versus MSP430FR5735IDA, it delivers full I/O and analog channel access in a smaller 6×6 mm VQFN footprint.

Availability

MSP430FR5735IRHAR is available at Aetrix Electronics and suitable for home automation gateways, security sensor hubs, and industrial data loggers requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR5735IRHAR 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 for industrial, automotive, and consumer markets.

The MSP430FR573x family targets ultra-low-power sensing and system management, combining FRAM memory, intelligent peripherals, and sub-µA sleep modes for battery-operated edge devices.

FAQ

What is the FRAM endurance specification for MSP430FR5735IRHAR?

The MSP430FR5735IRHAR features ferroelectric RAM with 10¹⁵ write cycle endurance - orders of magnitude higher than flash memory. This enables frequent data logging (e.g., sensor readings every second) for decades without memory wear-out. The MSP430FR5735IRHAR achieves this while maintaining 125 ns per word write speed and zero erase latency.

Does MSP430FR5735IRHAR support real-time clock operation with external 32-kHz crystal?

Yes, the MSP430FR5735IRHAR supports RTC operation with external 32-kHz crystal connected to PJ.4/XIN and PJ.5/XOUT pins. In LPM3.5 mode, it draws only 1.5 µA typical - enabling calendar-based wake-up and timestamping without external RTC IC. The MSP430FR5735IRHAR also includes built-in crystal oscillator circuitry with automatic gain control.

What debug interface does MSP430FR5735IRHAR use?

The MSP430FR5735IRHAR uses the two-pin Spy-Bi-Wire (SBW) interface via RST/NMI/SBWTDIO and TEST/SBWTCK pins. This allows full JTAG-equivalent debugging and programming using TI's MSP-FET430U40A or low-cost MSP-EXP430FR5739 launchpad. The MSP430FR5735IRHAR does not require external voltage for programming - serial onboard programming operates from the VCC supply.

How many analog-to-digital converter channels does MSP430FR5735IRHAR provide?

The MSP430FR5735IRHAR integrates a 10-bit ADC (ADC10_B) with 12 external input channels (A0–A11) plus 2 internal channels (temperature sensor and VCC/2 reference). It samples at up to 200 ksps with 100 µA active current. All channels are accessible on the 40-pin RHA package, including P1.x, P2.x, and P3.x pins designated for analog inputs.

Is MSP430FR5735IRHAR pin-compatible with other devices in the FR573x family?

Yes, the MSP430FR5735IRHAR shares identical pinout and package dimensions (40-pin VQFN, RHA) with MSP430FR5739IRHAR, MSP430FR5737IRHAR, and MSP430FR5733IRHAR. This enables direct substitution within the same footprint for design flexibility - for example, upgrading to 16 KB FRAM (MSP430FR5739IRHAR) without PCB revision. Pin functions match across all RHA-package variants.

MSP430FR5735IRHAR 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:: 24MHz

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

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

Number of I/O:: 32

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:

MSP430FR5735IRHAR FAQ

1.How can I place an order for MSP430FR5735IRHAR through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430FR5735IRHAR 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 MSP430FR5735IRHAR reliable?

The price and inventory of MSP430FR5735IRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5735IRHAR is usually 5 days.

3.What payment methods are accepted for MSP430FR5735IRHAR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5735IRHAR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430FR5735IRHAR?

MSP430FR5735IRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430FR5735IRHAR 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 MSP430FR5735IRHAR?

For technical support, including MSP430FR5735IRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5735IRHAR requirements.

6.How does Aetrix verify that MSP430FR5735IRHAR is sourced from the original manufacturer or authorized distributors?

All MSP430FR5735IRHAR 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 MSP430FR5735IRHAR meets industry standards.

7.What is the process for return or replacement of MSP430FR5735IRHAR?

All MSP430FR5735IRHAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5735IRHAR, 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 MSP430FR5735IRHAR part is unused and in its original packaging.

Return procedure for MSP430FR5735IRHAR:

1.Submit a request within 90 days.

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

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