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Texas Instruments MSP430FR5732IPW
- Part No.:
- MSP430FR5732IPW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430FR5732IPW.pdf
- Description:
- IC MCU 16BIT 8KB FRAM 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
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Product details
Overview
MSP430FR5732IPW from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8KB FRAM nonvolatile memory, 1KB RAM, and a 24-MHz CPU. It integrates a 10-bit ADC with 12 external channels, a 16-channel analog comparator, three eUSCI modules (two UART/IrDA/SPI, one I²C/SPI), five 16-bit timers, RTC, hardware multiplier, and DMA-targeted for battery-powered sensor nodes in industrial monitoring systems.
For engineers reviewing the MSP430FR5732IPW datasheet, MSP430FR5732IPW pinout, MSP430FR5732IPW application, or MSP430FR5732IPW equivalent, key selection criteria include FRAM endurance (10¹⁵ write cycles), LPM3.5 RTC current (1.5 µA), 28-pin TSSOP package compatibility, and absence of integrated ADC reference buffer on this variant.
Technical Context
The MSP430FR5732IPW implements the MSP430xV2 CPU core with unified FRAM memory architecture enabling simultaneous read/write operations without erase cycles. Its power management includes SVS/BOR circuitry, LDO regulator, and seven low-power modes-LPM3.5 retains RTC operation with crystal while consuming only 1.5 µA.
Peripherals are clocked via flexible system clock sources: DCO (up to 24 MHz), VLO (12 kHz), LFXT (32.768 kHz crystal), and HFXT (up to 24 MHz). The device supports Spy-Bi-Wire (SBW) programming and debugging through dedicated TEST/SBWTCK and RST/NMI/SBWTDIO pins.
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 active power (81.4 µA/MHz). |
| Nonvolatile Memory | 8KB FRAM-supports 10¹⁵ write cycles, 125 ns/word write speed, ECC protection, and unified program/data storage. |
| ADC | 10-bit SAR ADC with 12 external input channels, 200 ksps sampling rate at 100 µA-suitable for multi-sensor data acquisition. |
| Low-Power Modes | LPM3.5 (RTC + crystal): 1.5 µA; LPM4.5 (shutdown): 0.32 µA-enables years of operation on coin-cell batteries. |
| Package | TSSOP-28 (PW), 9.7 mm × 4.4 mm body-compatible with standard surface-mount assembly and space-constrained PCB layouts. |
| Supply Voltage | 2.0 V to 3.6 V-supports direct connection to single Li-ion, Li-SOCl₂, or dual-AA battery systems without external regulation. |
| Operating Temperature | –40°C to +85°C-qualified for industrial-grade deployment in uncontrolled environments. |
Pinout & Package
Package: TSSOP-28 (PW), 9.7 mm × 4.4 mm body, exposed thermal pad recommended to be connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF- | Multi-function I/O | Primary RTC calibration output, TA0 capture input, DMA trigger source, and ADC channel A0 input (with internal reference negative terminal). |
| P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+ | Multi-function I/O | ADC channel A1 input with internal reference positive terminal, TA0/TA1 clock source, and comparator output. |
| P1.4/TB0.1/UCA0STE/A4*/CD4 | Multi-function I/O | eUSCI_A0 SPI slave transmit enable, TB0 capture input, and ADC channel A4 input. |
| P1.5/TB0.2/UCA0CLK/A5*/CD5 | Multi-function I/O | eUSCI_A0 SPI master clock output / slave clock input, TB0 capture input, and ADC channel A5 input. |
| PJ.0/TDO/TB0OUTH/SMCLK/CD6 | Multi-function I/O | JTAG/SBW test data output, SMCLK output, TB0 PWM high-impedance control, and comparator input CD6. |
| RST/NMI/SBWTDIO | Dedicated debug/reset | Active-low reset, non-maskable interrupt input, and bidirectional SBW data I/O for programming and debugging. |
| TEST/SBWTCK | Dedicated debug | Test clock input for SBW interface-required for flash programming and real-time debugging without JTAG header. |
| DVCC / DVSS | Power supply | Digital core supply (2.0–3.6 V) and ground-must be decoupled with 100 nF ceramic capacitor near package. |
| AVCC / AVSS | Analog supply | Analog subsystem supply and ground-requires separate low-noise filtering from DVCC to ensure ADC accuracy. |
| PJ.4/XIN / PJ.5/XOUT | Clock input/output | Crystal oscillator connections for 32.768 kHz LFXT-essential for RTC operation in LPM3.5 mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 8KB unified memory with 10¹⁵ write endurance and zero-write-delay-eliminates flash erase latency and wear leveling overhead in logging applications. |
| Ultra-Low-Power RTC | Real-time clock with calendar and alarm functions operating at 1.5 µA in LPM3.5 using 32.768 kHz crystal-enables precise time-stamped sensor wake-up without external RTC IC. |
| Hardware Acceleration | 32-bit hardware multiplier and three-channel DMA-offloads math-intensive tasks (e.g., FFT, filtering) from CPU, reducing active time and total energy per measurement. |
| Integrated Power Management | On-chip LDO, supply voltage supervisor (SVS), and zero-power brownout detection-removes need for external supervisors and simplifies BOM for battery-operated designs. |
| Flexible Serial Interfaces | eUSCI_A0/A1 (UART/IrDA/SPI) and eUSCI_B0 (I²C/SPI)-supports daisy-chain sensor networks, wireless module bridging, and EEPROM communication without protocol translation ICs. |
Applications
| Smart Metering Node | Industrial Wireless Sensor |
|---|---|
Use Scenario: Battery-powered electricity/water meter collecting pulse counts, temperature, and tamper events over 10+ years. IC Role / Device Role / Timing Role: Primary system controller executing metrology firmware, managing FRAM-based event log, and waking every 15 minutes via RTC alarm to sample sensors and transmit data. Use Value: 8KB FRAM stores >100,000 timestamped events with 10¹⁵ write cycles; LPM4.5 shutdown current (0.32 µA) extends battery life beyond 15 years on CR2032. | Use Scenario: DIN-rail mounted vibration/temperature node in factory automation, reporting condition data every 5 seconds via LoRaWAN gateway. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating ADC readings, running digital filters, and formatting packets for UART-to-LoRa bridge; RTC triggers periodic self-test routines. Use Value: Hardware multiplier accelerates RMS calculation; eUSCI_B0 I²C interfaces directly to MEMS accelerometer; 28-pin TSSOP fits compact industrial enclosure. |
| Asset Tracking Beacon | Building Automation Controller |
Use Scenario: GPS-denied indoor asset tag using BLE beaconing and motion-triggered location updates in warehouses. IC Role / Device Role / Timing Role: Motion-aware controller using comparator_D to detect acceleration thresholds, then waking CPU to log position via FRAM and initiate BLE transmission. Use Value: Comparator_D with programmable hysteresis enables reliable wake-on-motion without CPU polling; 1.5 µA RTC current ensures accurate sleep timing between beacons. | Use Scenario: HVAC zone controller reading temperature/humidity sensors, driving relays, and communicating via RS-485 Modbus network. IC Role / Device Role / Timing Role: Field-level controller executing PID loops, managing relay timing via Timer_B PWM outputs, and buffering Modbus responses in FRAM during transient bus faults. Use Value: Five 16-bit timers support concurrent HVAC cycle timing, fan ramp control, and watchdog supervision; FRAM retains configuration across power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5732IRHA | 40-pin QFN (6×6 mm), 32 I/O pins, includes P3.x port (A12–A15, CD12–CD15) not present on PW package | Supports higher channel-count ADC configurations and additional GPIO for complex sensor arrays | Select when >21 GPIO or full 16-channel comparator inputs are required; requires PCB redesign due to different footprint. |
| MSP430FR5734IPW | Identical TSSOP-28 package and pinout; differs in FRAM size (16KB vs. 8KB) and ADC channel count (8 ext + 2 int vs. 0 ext + 2 int) | Enables larger firmware images and supports up to 8 external analog sensors without external MUX | Drop-in replacement for memory- or ADC-channel–constrained upgrades; same layout, no schematic change needed. |
Compared with MSP430FR5732IPW, the MSP430FR5732IRHA offers expanded I/O and analog routing at the cost of larger board area, while MSP430FR5734IPW provides double FRAM and added ADC channels within the identical TSSOP-28 footprint-making it the preferred upgrade path for firmware scalability and sensor integration.
Availability
MSP430FR5732IPW is available at Aetrix Electronics and suitable for smart metering, industrial wireless sensing, and building automation applications requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430FR5732IPW 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The MSP430FR57xx family was designed specifically for ultra-low-power sensing and system management in battery-operated infrastructure devices-including smart grid endpoints, environmental monitors, and predictive maintenance nodes-leveraging FRAM for reliable data logging under extreme duty cycles.
FAQ
What is the maximum operating frequency of the MSP430FR5732IPW CPU?
The MSP430FR5732IPW CPU operates at a maximum frequency of 24 MHz, achieved using the digitally controlled oscillator (DCO) with factory-trimmed calibration. This frequency is supported across the full operating voltage range (2.0 V to 3.6 V) and temperature range (–40°C to +85°C), enabling deterministic real-time execution in time-critical sensor processing tasks.
Does the MSP430FR5732IPW include an integrated ADC reference voltage generator?
No, the MSP430FR5732IPW does not include an integrated ADC reference voltage generator. While it supports external reference inputs (VeREF+ and VeREF– on P1.1 and P1.0), and has internal 1.5-V and 2.5-V references, the device lacks the internal reference buffer amplifier found in higher-variant members like MSP430FR5739. Designers must use external precision references or rely on the internal references with appropriate bypassing.
How many I/O pins are available on the MSP430FR5732IPW in its TSSOP-28 package?
The MSP430FR5732IPW provides 21 general-purpose I/O pins in the TSSOP-28 (PW) package. These include P1.x (8 pins), P2.x (6 pins), PJ.x (4 pins), and P4.0 (1 pin). Pins P3.x and certain comparator/ADC channels (A12–A15, CD12–CD15) are not bonded out in this package variant, as confirmed by the device comparison table and pin diagrams in the SLAS639L datasheet.
What debug interface does the MSP430FR5732IPW support, and what pins are required?
The MSP430FR5732IPW supports the Spy-Bi-Wire (SBW) debug interface, requiring only two pins: RST/NMI/SBWTDIO (pin 1) and TEST/SBWTCK (pin 2). This 2-wire interface enables full programming, breakpoint debugging, and real-time variable inspection using TI's MSP-FET430U40A or compatible tools-without needing a full 4-wire JTAG header, saving PCB space and BOM cost.
Is the MSP430FR5732IPW pin-compatible with other devices in the MSP430FR573x family?
The MSP430FR5732IPW is pin-compatible with other TSSOP-28 variants in the family, including MSP430FR5734IPW and MSP430FR5736IPW. All share identical pin numbering, electrical characteristics, and signal mapping per the PW package pin diagram. However, functional differences exist-such as FRAM size, ADC channel count, and timer configurations-which must be verified against the specific device variant's datasheet before substitution.
MSP430FR5732IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430™ FRAM
- Packaging:
- Tube
- 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:
- 21
- 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:
MSP430FR5732IPW FAQ
1.How can I place an order for MSP430FR5732IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR5732IPW 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 MSP430FR5732IPW reliable?
The price and inventory of MSP430FR5732IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR5732IPW is usually 5 days.
3.What payment methods are accepted for MSP430FR5732IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR5732IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR5732IPW?
MSP430FR5732IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR5732IPW 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 MSP430FR5732IPW?
For technical support, including MSP430FR5732IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR5732IPW requirements.
6.How does Aetrix verify that MSP430FR5732IPW is sourced from the original manufacturer or authorized distributors?
All MSP430FR5732IPW 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 MSP430FR5732IPW meets industry standards.
7.What is the process for return or replacement of MSP430FR5732IPW?
All MSP430FR5732IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5732IPW, 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 MSP430FR5732IPW part is unused and in its original packaging.
Return procedure for MSP430FR5732IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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