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Texas Instruments MSP430FR5733IDAR
- Part No.:
- MSP430FR5733IDAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
MSP430FR5733IDAR.pdf
- Description:
- IC MCU 16BIT 8KB FRAM 38TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430FR5733IDAR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8KB FRAM nonvolatile memory, 1KB SRAM, 24-MHz system clock, 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 nodes requiring RTC, low-power ADC sampling, and secure firmware updates via hardware UART BSL.
For engineers reviewing the MSP430FR5733IDAR datasheet, MSP430FR5733IDAR pinout, MSP430FR5733IDAR application, or MSP430FR5733IDAR equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), LPM3.5 RTC current (1.5 µA), 10-bit ADC performance (200 ksps at 100 µA), and TSSOP-38 package compatibility with legacy MSP430 design layouts.
Technical Context
The MSP430FR5733IDAR implements a 16-bit CPUXV2 core with seven low-power modes, including LPM4.5 (0.32 µA shutdown) and LPM3.5 with crystal-based RTC (1.5 µA). Its FRAM memory replaces flash and SRAM, enabling unified program/data/storage space with ECC and MPU protection.
Peripherals include two eUSCI_A modules (UART/IrDA/SPI), one eUSCI_B module (I²C/SPI), five 16-bit timers (three Timer_A and three Timer_B instances), 12-channel 10-bit ADC with internal reference, and 16-channel comparator with programmable hysteresis - all directly accessible without external components in typical sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit CPUXV2 RISC, up to 24 MHz - enables deterministic real-time control with low gate count and minimal power per instruction. |
| Nonvolatile Memory | 8 KB FRAM - supports 10¹⁵ write cycles, 125 ns/word write speed, and zero wait-state execution for firmware and data logging. |
| RAM | 1 KB SRAM - provides fast volatile working memory for stack, variables, and DMA buffers independent of FRAM access timing. |
| ADC | 10-bit, 12-channel SAR ADC - delivers 200 ksps sampling at 100 µA, with internal reference and sample-and-hold for direct sensor interfacing. |
| Low-Power Modes | LPM3.5: 1.5 µA (RTC + crystal); LPM4.5: 0.32 µA - enables multi-year battery life in periodic wake-up sensor applications. |
| Supply Voltage | 2.0 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, and dual-cell alkaline battery systems without external regulators. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and outdoor environmental monitoring deployments. |
Pinout & Package
TSSOP-38 package (body size 12.5 mm × 6.2 mm) with exposed thermal pad recommended for connection to DVSS. Pin functions validated per TI SLAS639L Rev. December 2017, Section 4.2 (DA package diagram).
| 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-like programming interface - eliminates need for dedicated JTAG header in space-constrained designs. |
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function I/O | Supports RTC calibration output, ADC channel A0 input, comparator CD0, and DMA trigger - consolidates timing, sensing, and event-handling on one pin. |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | Multi-function I/O | Provides ADC reference input (VeREF+), comparator output (CDOUT), and timer clock source - enables self-referenced analog measurement chains. |
| eUSCI_A0 (P2.0/P2.1/P1.4/P1.5) | UART/IrDA/SPI interface | Dedicated hardware UART with automatic baud-rate detection and IrDA encoding - allows direct connection to BLE modules or optical transceivers without software bit-banging. |
| eUSCI_B0 (P1.6/P1.7/P2.2/P2.6/P2.5) | I²C/SPI interface | Full I²C master/slave support with multiple-slave addressing - interfaces natively with temperature, humidity, and motion sensors using standard protocols. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 8 KB unified memory with 10¹⁵ write endurance and 125 ns write speed - eliminates flash wear leveling overhead and enables true data-logging at sensor sampling rates. |
| Hardware UART Bootloader (BSL) | Factory-programmed ROM bootloader accessible via eUSCI_A0 - enables field firmware updates over UART without external programmer or voltage injection. |
| Real-Time Clock (RTC_B) | Calendar mode with alarm and 32-kHz crystal support - provides accurate timekeeping down to 1.5 µA in LPM3.5, critical for scheduled sensor wake-ups. |
| Three-Channel DMA | Offloads CPU during ADC conversions, UART transfers, and FRAM writes - reduces active-mode time and extends battery life in burst-mode sensing. |
| Memory Protection Unit (MPU) | Configurable read/write/execute permissions per memory region - enforces firmware integrity and prevents accidental corruption of boot code or calibration data. |
Applications
| Smart Meter Sensor Node | Industrial Wireless Transmitter |
|---|---|
Use Scenario: Battery-powered gas meter with pressure, temperature, and flow sensing, transmitting hourly readings via LPWAN. IC Role / Device Role / Timing Role: Main controller executing sensor acquisition, RTC-triggered wake-up, FRAM-based data buffering, and UART-driven modem communication. Use Value: 1.5 µA LPM3.5 RTC current and 8 KB FRAM enable >10-year operation on primary lithium cells while retaining full event history. | Use Scenario: DIN-rail mounted vibration monitor in factory automation, sampling accelerometers at 1 kHz and reporting anomalies via RS-485. IC Role / Device Role / Timing Role: Signal conditioner and protocol translator between analog sensors and industrial bus interface. Use Value: 200 ksps ADC throughput and hardware UART BSL allow real-time oversampling and remote firmware patching without plant downtime. |
| Asset Tracking Beacon | Environmental Data Logger |
Use Scenario: GPS-denied indoor asset tag using RSSI-based localization, logging location events and battery voltage every 5 minutes. IC Role / Device Role / Timing Role: Low-power state machine managing BLE advertising, ADC-based battery monitoring, and FRAM-resident event queue. Use Value: 0.32 µA LPM4.5 shutdown current and unified FRAM memory simplify firmware architecture by eliminating separate EEPROM for event storage. | Use Scenario: Outdoor weather station measuring temperature, humidity, and barometric pressure, storing 30 days of 10-minute samples. IC Role / Device Role / Timing Role: Autonomous data acquisition engine with RTC scheduling, analog front-end conditioning, and SPI-connected SD card interface. Use Value: 16-channel comparator enables simultaneous threshold detection across multiple sensors, reducing wake-up latency and average power. |
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 |
|---|---|---|---|
| MSP430FR5735IDAR | 16 KB FRAM, same 1 KB SRAM, identical peripherals and pinout - differs only in FRAM capacity. | Preferred where firmware size exceeds 8 KB or long-term data logging requires >8 KB buffer space. | Select MSP430FR5735IDAR when code footprint or persistent data volume exceeds 8 KB; otherwise MSP430FR5733IDAR offers optimal cost/performance balance. |
| MSP430FR5969IPM | 64 KB FRAM, 2 KB RAM, integrated LCD driver, different 80-pin QFN package - not pin-compatible. | Suitable for feature-rich HMI applications requiring display support and larger memory, but requires PCB redesign. | Choose MSP430FR5969IPM only when LCD integration or >16 KB memory is mandatory; MSP430FR5733IDAR remains optimal for compact, cost-sensitive sensor nodes. |
Compared with MSP430FR5735IDAR, the MSP430FR5733IDAR trades 8 KB FRAM capacity for lower unit cost and identical power/peripheral performance; versus MSP430FR5969IPM, it delivers TSSOP-38 compatibility and proven qualification for industrial sensor use cases without unnecessary feature bloat.
Availability
MSP430FR5733IDAR is available at Aetrix Electronics and suitable for smart metering, industrial wireless transmitters, asset tracking beacons, and environmental data loggers requiring stable component supply and long-term production continuity.
Supply support for MSP430FR5733IDAR 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 delivering analog and embedded processing solutions, with leadership in low-power microcontrollers and precision analog signal chains.
The MSP430FR57xx product line was designed specifically for ultra-low-power sensing and system management in building automation, smart grid infrastructure, and industrial IoT edge nodes - leveraging FRAM to eliminate flash write limitations in data-intensive applications.
FAQ
What is the maximum system clock frequency supported by the MSP430FR5733IDAR?
The MSP430FR5733IDAR supports a maximum system clock frequency of 24 MHz, achieved via its factory-trimmed DCO oscillator or external HFXT crystal. This frequency enables real-time processing of sensor data streams while maintaining sub-100 µA/MHz active-mode current consumption, making it suitable for responsive yet energy-efficient embedded control tasks.
Does the MSP430FR5733IDAR include hardware support for secure firmware updates?
Yes, the MSP430FR5733IDAR includes a factory-programmed hardware UART bootloader (BSL) that enables secure in-field firmware updates over UART without requiring external programming voltage or debug probes. The BSL resides in ROM and supports password-protected entry, ensuring robust field upgrade capability for deployed MSP430FR5733IDAR devices.
How much FRAM and SRAM memory does the MSP430FR5733IDAR provide?
The MSP430FR5733IDAR integrates 8 KB of ferroelectric RAM (FRAM) for nonvolatile program and data storage, plus 1 KB of volatile SRAM for high-speed runtime operations. The FRAM provides 10¹⁵ write endurance and 125 ns write speed, eliminating flash wear-out concerns and enabling efficient data logging directly within the MSP430FR5733IDAR's unified memory architecture.
What low-power modes are available on the MSP430FR5733IDAR, and what are their typical currents?
The MSP430FR5733IDAR offers seven low-power modes, including LPM3.5 (1.5 µA with RTC + 32-kHz crystal) and LPM4.5 (0.32 µA shutdown). These modes are optimized for extended battery life in intermittent-sensing applications, with verified current values published in TI SLAS639L Section 5.5 - enabling precise power budgeting for MSP430FR5733IDAR-based designs.
Is the MSP430FR5733IDAR pin-compatible with other devices in the MSP430FR57xx family?
Yes, the MSP430FR5733IDAR in the TSSOP-38 (DA) package shares identical pinout and signal mapping with MSP430FR5731IDAR, MSP430FR5735IDAR, MSP430FR5737IDAR, and MSP430FR5739IDAR - allowing direct substitution within the same footprint for memory-scaling or feature-adjusted variants without PCB revision.
MSP430FR5733IDAR 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:
- 8KB (8K 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:
MSP430FR5733IDAR FAQ
1.How can I place an order for MSP430FR5733IDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5733IDAR 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 MSP430FR5733IDAR reliable?
The price and inventory of MSP430FR5733IDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5733IDAR is usually 5 days.
3.What payment methods are accepted for MSP430FR5733IDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5733IDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5733IDAR?
MSP430FR5733IDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5733IDAR 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 MSP430FR5733IDAR?
For technical support, including MSP430FR5733IDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5733IDAR requirements.
6.How does Aetrix verify that MSP430FR5733IDAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR5733IDAR 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 MSP430FR5733IDAR meets industry standards.
7.What is the process for return or replacement of MSP430FR5733IDAR?
All MSP430FR5733IDAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5733IDAR, 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 MSP430FR5733IDAR part is unused and in its original packaging.
Return procedure for MSP430FR5733IDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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